The Benefits of Using Pigment Red 57:1

Preparation method of modified pigment red 57:1 Technical Field The invention relates to the technical field of pigment preparation methods, in particular to a preparation method of modified pigment red 57: 1. Background Pigment red 57: 1(c.i. pigment red 57:1), also known as lysolrubin BK; lithol rubine A6B; Lisolberry Red FBB; magenta 6B; pigment brilliant red 6B; pigment Red 6B; 3-hydroxy-4- [ (4-methyl-2-sulfophenyl) azo ] -2-naphthoic acid calcium salt, the structural formula of which is shown in figure 1. Pigment Red 57:1(pt,th,tr) is suitable for various printing inks, has a shade which corresponds to the magenta color prescribed for a four-color plate, has high tinctorial strength and good light fastness on a 4-5 level (1/1 SD). Approximately 265 card numbers are offered by nearly 50 companies. The pigment is mainly used for coloring paint, ink, oil paint and watercolor, and can also be used for coloring rubber, plastic wires, electronic spray and daily chemicals. Pigment Red 57:1 was synthesized by coupling a diazonium salt of 4-aminotoluene-3-sulfonic acid and 3-hydroxy-2-naphthoic acid to obtain an azo pigment, which was then further laked with an inorganic calcium compound. The Turkey acid is added during synthesis to change the particle size and the color light; however, the pigment prepared by the method has poor alkali resistance and storage stability, and is easy to generate phenomena of coarse turning, thickening and the like after being placed in an aqueous acrylic acid system for a long time, so that the application of the pigment in the aqueous system is limited to a great extent. Pigment red 57:1, the color lake generates displacement effect of metal ions due to metal dissociation in an aqueous medium, so that the alkaline printing ink becomes thick when being stored, and can be replaced by C.I. pigment red 184 (a mixed coupled product) to prevent the thickening of the printing ink; in emulsion paints and plastics (soft PVC, LDPE), food red No.7 was used. The invention patent of publication No. CNA discloses a water dispersible pigment Red 57:1 modified pigment and a preparation method thereof, wherein inorganic core modification and surface modification are combined, and the particle size and distribution of the pigment are controlled by the inorganic core modification, so that the dispersion uniformity of the pigment in an aqueous medium is improved; hydrophilic groups are grafted through the surface modification of the second coupling component so as to improve the dispersing capacity of the modified pigment in an aqueous medium. Finally, the water dispersible C.I. pigment red 57:1 modified pigment is prepared by selecting the dosage and the type of the dispersant. Compared with the similar products sold in the market, the C.I. pigment red 57:1 modified pigment has better hydrophilicity and water dispersibility, the contact size of a sample tablet is 37.07-67.38 degrees, and the viscosity of the acrylic acid water-based paint prepared from the modified pigment is 73.26-102.47 centipoises. The technical proposal is adopted because the addition of the inorganic core can cause the reduction of the coloring power of the pigment. The invention patent of publication No. CNA discloses a preparation method of C.I. waterborne modified pigment red 57:1Firstly, preparing diazo liquid and coupling liquid, placing prepared diazo liquid into coupling liquid to make coupling, then making after-treatment, adding Sr when making after-treatment 2+、Al3+And Mg2+And styrene maleic anhydride dispersant, and then carrying out filter pressing, drying, mixing, standardization and inspection to obtain the finished pigment red 57: 1. The pigment prepared by the preparation method of the C.I. water-based modified pigment red 57:1 has good alkali resistance and stable storage, can not generate the phenomena of coarse reversion, thickening and the like after being placed in a water-based acrylic acid system for a long time, and can be freely applied in the water-based system. The technical scheme has complex heating process and complicated operation process. Two preparation schemes above, pigment red 57 prepared: 1, the lake pigment is a water-soluble acid dye in an aqueous medium due to the dissociation of alkaline earth metal ions such as calcium ions, strontium ions, magnesium ions and the like which are complexed by the lake and the replacement of the metal ions, so that the lake pigment is influenced by the viscosity of color paste and the color fastness of a coating. Disclosure of Invention In order to solve the problems, the invention provides a preparation method of modified pigment red 57:1, the pigment red 57:1 prepared by using the 4B acid composition has higher stability and lower viscosity in an aqueous solution, the technical problem that calcium benzenesulfonate in a 4B acid structure in pigment lake is replaced due to ionization is solved, and the influence on the viscosity of a color paste and the color fastness of a coating layer in the using process of the pigment red 57:1 is prevented. In order to achieve the above purpose, the invention adopts a technical scheme that: a preparation method of modified pigment red 57:1 comprises the following steps: s10, placing the 4B acid composition, hydrochloric acid, a sodium nitrite solution and purified water in a diazo tank for reaction to obtain a first mixed solution; s20, dissolving the 2, 3-acid in a dissolving tank, and placing the solution in a coupling tank after cleaning to obtain a first reaction solution; s30, placing the first mixed solution into the first reaction solution for coupling reaction, and adding urea and a disproportionated rosin sodium water solution in sequence while stirring to obtain a reaction product; and S40, adding calcium chloride into the reaction product, fully reacting, and sequentially performing material beating, filter pressing, drying and crushing to obtain pigment red 57: 1; wherein the 4B acid composition comprises a 4B acid and a composition comprising at least one of (3-aminophenyl) phosphonic acid or 5-chloro-2-aminophenylphosphonic acid. Further, the composition accounts for 3% -10% of the mass of the 4B acid. Further, the step S10 includes the following steps: s11, adding a proper amount of purified water into a diazo tank, adding the 4B acid composition, pulping, adding liquid alkali, dissolving, adding ice blocks, and cooling to below 20 ℃ to obtain a first solution; s12, adding hydrochloric acid with a certain mass into the first solution, stirring for a certain time, continuing adding ice, and cooling to-2 ℃ to obtain a second solution; and S13, adding a sodium nitrite solution and potassium iodide test paper bluish into the second solution, and fully stirring for later use to obtain the first mixed solution. Further, the step S20 includes the following steps: s21, putting a proper amount of purified water into a material dissolving tank, adding 2, 3-acid, pulping for 10-90 minutes, adding liquid alkali, and dissolving to obtain a third solution; and adding a proper amount of bottom water into the S22 coupling tank, putting the third solution into the coupling tank, adding ice blocks, cooling to 1-3 ℃ for later use, and obtaining a first reaction solution. Further, the amount of the substance of the 2, 3-acid is the same as the amount of the substance of the 4B acid. Further, the pH value of the coupling reaction is 10.5-11, the temperature is 0-5 ℃, and the reaction time of the coupling reaction is 10-60 min. Further, the pH value of the reaction in the step S40 is 10.5, the temperature is kept at 60 ℃ for sufficient reaction for 60 minutes, the temperature is raised to 85-90 ℃, the temperature is kept for 5-10 minutes, and the finished pigment red 57:1 is obtained after material beating, filter pressing, drying, crushing and inspection. Compared with the prior art, the technical scheme of the invention has the following advantages: the invention relates to a preparation method of modified pigment red 57:1, which selects at least one of (3-aminophenyl) phosphonic acid or 5-chloro-2-aminophenylphosphonic acid to replace part of 4B acid to obtain a 4B acid composition, and the pigment red 57:1 prepared by using the 4B acid composition has higher stability and lower viscosity in an aqueous solution because the ionization constant of (3-aminophenyl) phosphonic acid or 5-chloro-2-aminophenylphosphonic acid is lower and alkaline earth metal salts are less easy to ionize, thereby solving the technical problem that calcium benzenesulfonate in the 4B acid structure in pigment lakes is replaced due to ionization and preventing the influence on the viscosity of a color paste and the color fastness of a coating layer in the using process of the pigment red 57: 1. Drawings The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings. FIG. 1 shows the structural formula of pigment Red 57: 1; FIG. 2 is a flow chart illustrating a method for preparing modified pigment Red 57:1 in accordance with one embodiment of the present invention; FIG. 3 shows a synthetic route for modified pigment Red 57:1 according to one embodiment of the present invention; FIG. 4 shows a synthetic route for a modified pigment Red 57:1 according to another embodiment of the present invention. Detailed Description The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiment provides a preparation method of modified pigment red 57:1, as shown in fig. 2 to 4, comprising the following steps: s10 the 4B acid composition, hydrochloric acid, sodium nitrite solution and purified water are placed in a diazo tank to react to obtain a first mixed solution. S20, dissolving the 2, 3-acid in a dissolving tank, and placing the solution in a coupling tank after cleaning to obtain a first reaction solution. S30, placing the first mixed solution into the first reaction solution for coupling reaction, and adding urea and a disproportionated rosin sodium water solution in sequence while stirring to obtain a reaction product. And S40, adding calcium chloride into the reaction product, fully reacting, and sequentially performing material beating, filter pressing, drying and crushing to obtain the pigment red 57: 1. Wherein the 4B acid composition comprises a 4B acid and a composition comprising at least one of (3-aminophenyl) phosphonic acid or 5-chloro-2-aminophenylphosphonic acid. The composition accounts for 3-10% of the mass of the 4B acid. The step S10 includes the following steps: s11, adding a proper amount of purified water into a diazo tank, adding the 4B acid composition, pulping, adding liquid alkali, dissolving, adding ice blocks, and cooling to below 20 ℃ to obtain a first solution. S12, adding hydrochloric acid with a certain mass into the first solution, stirring for a certain time, and then continuing to add ice to cool to-2 ℃ to obtain a second solution. And S13, adding a sodium nitrite solution and potassium iodide test paper bluish into the second solution, and fully stirring for later use to obtain the first mixed solution. The step S20 includes the following steps: s21, adding a proper amount of purified water into a material dissolving tank, adding 2, 3-acid, pulping for 10-90 minutes, adding liquid alkali, and dissolving to obtain a third solution. And adding a proper amount of bottom water into the S22 coupling tank, putting the third solution into the coupling tank, adding ice blocks, cooling to 1-3 ℃ for later use, and obtaining a first reaction solution. The amount of the 2, 3-acid species is the same as the amount of the 4B acid species. In the step S30, the pH value of the coupling reaction is 10.5-11, the temperature is 0-5 ℃, and the reaction time of the coupling reaction is 10-60 min. Sodium disproportionate rosin water or urea is usually added during the coupling reaction in order to remove the sodium nitrite during the coupling reaction. And (3) keeping the reaction pH value of the step S40 at 10.5, keeping the temperature at 60 ℃ for fully reacting for 60 minutes, heating to 85-90 ℃, keeping the temperature for 5-10 minutes, and obtaining the finished pigment red 57:1 after material beating, filter pressing, drying, crushing and inspection. Example 1 388kg of 4B acid (purity 98%, from Jiaxing, chemical Co., Ltd.) and 12kg of (3-aminophenyl) phosphonic acid (national drug group) were combined to form a 4B acid composition. S11 adding L of purified water into a diazo tank, adding the 4B acid composition, pulping for 20 minutes, adding liquid alkali, adding ice blocks after dissolving, and cooling to below 20 ℃ to obtain a first solution. S12 adding 500L of concentrated hydrochloric acid into the first solution, stirring for 15 minutes, continuing adding ice, and cooling to-2 ℃ to obtain a second solution. And S13, keeping the temperature at 0 ℃, adding 370L of 40% sodium nitrite aqueous solution and potassium iodide test paper bluish into the second solution at one time while stirring, and fully stirring for later use to obtain the first mixed solution containing 4-aminotoluene-3-sulfonic acid diazonium salt and (3-aminophenyl) phosphonic acid diazonium salt. S21 putting L of clean water into a material dissolving tank, adding 403kg of 2, 3-acid, pulping for 90 minutes, adding 400kg of liquid alkali, and dissolving to obtain a third solution. And adding a proper amount of bottom water into the S22 coupling tank, putting the third solution into the coupling tank, adding ice blocks, cooling to 1-3 ℃ for later use, and obtaining a first reaction solution. S30, keeping the reaction system at 0-5 ℃, putting the first mixed solution into the first reaction solution for coupling reaction while stirring within 60min, controlling the pH value of the reaction system at 10.5-11 and the temperature at 5 ℃, and sequentially adding 1kg of urea and 200kg of 25% disproportionated rosin sodium water solution while stirring to obtain a reaction product. S40, heating the reaction product to 60 ℃, adding 238kg of calcium chloride powder while rapidly stirring, keeping the temperature for reaction for 60min, heating to 90 ℃, cooling, performing suction filtration and washing to obtain a filter cake, placing the filter cake in an air-blast drying oven, drying at 85 ℃, and grinding to obtain the modified pigment red 57:1 pigment. Example 2 90kg of 4B acid (purity 98%, from Kasching chemical Co., Ltd.) and 5kg of (3-aminophenyl) phosphonic acid (national drug group) and 5g of 5-chloro-2-aminophenylphosphonic acid were combined to prepare a 4B acid composition. S11 adding 600mL of purified water into a 1L big beaker, adding the 4B acid composition, pulping for 20 minutes, adding liquid alkali, adding ice blocks after dissolving, and cooling to below 20 ℃ to obtain a first solution. S12 to the first solution was added 100mL of concentrated hydrochloric acid to obtain a second solution. And S13, keeping the temperature at 0 ℃, adding 97g of 40% sodium nitrite aqueous solution and potassium iodide test paper bluish to the second solution at a time while stirring, and sufficiently stirring for later use to obtain the first mixed solution containing 4-aminotoluene-3-sulfonic acid diazonium salt, (3-aminophenyl) phosphonic acid diazonium salt and (3-aminophenyl) phosphonic acid diazonium salt. S21A 5L big beaker is filled with 600mL of clean water, 100.5kg of 2, 3-acid is added, the mixture is pulped for 10 minutes, 400g of caustic soda liquid is added, and the mixture is cleared to obtain a third solution. And S22, adding ice blocks into the third solution, cooling to 1-3 ℃ for later use, and obtaining a first reaction solution. S30, keeping the reaction system at 0-5 ℃, putting the first mixed solution into the first reaction solution for coupling reaction while stirring within 20min, controlling the pH value of the reaction system at 10.5-11 and the temperature at 0-5 ℃, and adding 10g of urea and 50g of 25% sodium disproportionated rosin aqueous solution while stirring to obtain a reaction product. S40, heating the reaction product to 60 ℃, rapidly stirring and adding 60g of calcium chloride aqueous solution, keeping the temperature for reaction for 60min, heating to 90 ℃, cooling, performing suction filtration and washing to obtain a filter cake, placing the filter cake in an air-blast drying oven, drying at 85 ℃, and grinding to obtain the modified pigment red 57:1 pigment. Example 3 180g of 4B acid (purity 98%, from Jiaxing chemical Co., Ltd.) and 20g of 5-chloro-2-aminophenylphosphonic acid (national drug group) were combined to form a 4B acid composition. S11 adding mL of purified water into a 2.5L big beaker, adding the 4B acid composition, pulping for 20 minutes, adding liquid alkali, adding ice blocks after dissolving, and cooling to below 20 ℃ to obtain a first solution. S12 adding 200L of concentrated hydrochloric acid into the first solution, stirring for 15 minutes, continuing adding ice, and cooling to-2 ℃ to obtain a second solution. And S13, keeping the temperature at 0 ℃, adding 180g of 40% sodium nitrite aqueous solution and potassium iodide test paper bluish into the second solution at one time while stirring, and fully stirring for later use to obtain the first mixed solution containing 4-aminotoluene-3-sulfonic acid diazonium salt and (3-aminophenyl) phosphonic acid diazonium salt. S21A 5L big beaker is filled with 600mL of clean water, 199.1g of 2, 3-acid is added, the mixture is pulped for 20 minutes, 200g of caustic soda liquid is added, and the mixture is cleared to obtain a third solution. And S22, adding ice blocks into the third solution, cooling to 1-3 ℃ for later use, and obtaining a first reaction solution. S30, keeping the reaction system at 0-5 ℃, putting the first mixed solution into the first reaction solution for coupling reaction while stirring within 50min, controlling the pH value of the reaction system at 10.5-11 and the temperature at 5 ℃, and adding 5g of urea and 80g of 25% disproportionated rosin sodium water solution while stirring to obtain a reaction product. S40 heating the reaction product to 60 ℃, rapidly stirring and adding 126g of calcium chloride aqueous solution, keeping the temperature for reaction for 60min, heating to 90 ℃, cooling, performing suction filtration and washing to obtain a filter cake, placing the filter cake in an air-blast drying oven, drying at 85 ℃, and grinding to obtain the modified pigment red 57:1 pigment. Example 4 19.4g of 4B acid (purity 98%, from Koxing chemical Co., Ltd.) and 0.6g of 5-chloro-2-aminophenylphosphonic acid were combined to give a 4B acid composition. S11 adding 200ml of purified water into a 500ml beaker, adding the 4B acid composition, pulping for 20 minutes, adding liquid alkali, adding ice blocks after dissolving, and cooling to below 20 ℃ to obtain a first solution. S12 to the first solution was added 30ml of concentrated hydrochloric acid to obtain a second solution. And S13, keeping the temperature at 0 ℃, adding 19g of 40% sodium nitrite aqueous solution and potassium iodide test paper bluish into the second solution at one time while stirring, and fully stirring for later use to obtain the first mixed solution containing 4-aminotoluene-3-sulfonic acid diazonium salt and 5-chloro-2-aminophenylphosphonic acid diazonium salt. S21A 1L big beaker is filled with 200mL of clean water, 20.05g of 2, 3-acid is added, the mixture is pulped for 10 minutes, 10g of caustic soda liquid is added, and the mixture is cleared to obtain a third solution. And S22, adding ice blocks to cool to 1-3 ℃ for later use, and obtaining a first reaction liquid. S30, keeping the reaction system at 0-5 ℃, putting the first mixed solution into the first reaction solution for coupling reaction while stirring within 50min, controlling the pH value of the reaction system at 10.5-11 and the temperature at 5 ℃, and sequentially adding 2g of urea and 50g of 25% disproportionated rosin sodium water solution while stirring to obtain a reaction product. S40, heating the reaction product to 60 ℃, rapidly stirring and adding 13g of calcium chloride aqueous solution, keeping the temperature for reaction for 60min, heating to 90 ℃, cooling, performing suction filtration and washing to obtain a filter cake, placing the filter cake in an air-blast drying oven, drying at 85 ℃, and grinding to obtain the modified pigment red 57:1 pigment.

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Additional resources:
The Benefits of Using Calcium Alkyl Benzene Sulfonate TBN400
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