CN113462195A - Preparation method of modified sodium lignosulfonate dye dispersing agent - Google Patents
Preparation method of modified sodium lignosulfonate dye dispersing agent Download PDFInfo
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- CN113462195A CN113462195A CN202110761049.9A CN202110761049A CN113462195A CN 113462195 A CN113462195 A CN 113462195A CN 202110761049 A CN202110761049 A CN 202110761049A CN 113462195 A CN113462195 A CN 113462195A
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- sodium lignosulfonate
- leveling agent
- dye
- dye dispersant
- modified sodium
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- 229920005552 sodium lignosulfonate Polymers 0.000 title claims abstract description 65
- 239000002270 dispersing agent Substances 0.000 title claims abstract description 49
- 150000003385 sodium Chemical class 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 238000013329 compounding Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 37
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 28
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 27
- 229920005610 lignin Polymers 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 15
- 238000006116 polymerization reaction Methods 0.000 claims description 14
- 235000010265 sodium sulphite Nutrition 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 238000003916 acid precipitation Methods 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000006277 sulfonation reaction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000012839 conversion disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/008—Preparations of disperse dyes or solvent dyes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
- C07G1/00—Lignin; Lignin derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/0086—Non common dispersing agents anionic dispersing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/0089—Non common dispersing agents non ionic dispersing agent, e.g. EO or PO addition products
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/009—Non common dispersing agents polymeric dispersing agent
Abstract
The invention discloses a preparation method of a modified sodium lignosulfonate dye dispersing agent, which is prepared by compounding sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3. The sodium lignosulfonate dye dispersing agent prepared by the invention can effectively improve the sanding effect, shorten the sanding time for dye preparation and improve the high-temperature dispersibility of the dye.
Description
Technical Field
The invention relates to the technical field of production of dye dispersants, and particularly relates to a preparation method of a modified sodium lignosulfonate dye dispersant.
Background
In order to improve the dyeing performance of the dye, a dye dispersant needs to be added into the waste water, but when the conventional dye dispersant is used for sanding, the sanding effect is not ideal, more insoluble substances can still be measured in a sanded system, and the high-temperature dispersibility of the obtained finished product is poor, so that the dye cannot achieve the expected dyeing effect finally, and therefore, the problem needs to be improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a preparation method of a modified sodium lignosulfonate dye dispersing agent, the sodium lignosulfonate dye dispersing agent with low surface tension is prepared by optimizing and improving the preparation method, the sanding effect can be effectively improved, the sanding time of dye preparation is shortened, and the high-temperature dispersibility of dye is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a modified sodium lignosulfonate dye dispersing agent comprises the step of compounding sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 to prepare the sodium lignosulfonate dye dispersing agent.
The sodium lignosulfonate is prepared by sulfonating and polymerizing lignin extracted from papermaking black liquor.
The papermaking black liquor is subjected to membrane concentration and acid precipitation treatment to prepare the high-purity lignin.
The addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 10-40% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 1-3.
The method specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) carrying out sulfonation reaction on lignin and sodium sulfite, conveying the material liquid to a polymerization reaction kettle after the reaction, adding formaldehyde, and stirring for reaction to obtain sodium lignosulfonate;
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant.
In the step (b), the temperature of the sulfonation reaction is 60-90 ℃, and the time of the sulfonation reaction is 3-5 h.
In the step (b), formaldehyde is added into the polymerization reaction kettle, then the mixture reacts for 3 to 5 hours at the temperature of between 60 and 90 ℃, and the temperature is raised to 100 ℃ for continuous reaction for 5 to 8 hours.
In the step (b), the mass ratio of the lignin to the sodium sulfite and formaldehyde is 1: (0.5-1): (0.2-0.4).
The invention has the beneficial effects that: the sodium lignosulfonate is prepared by the procedures of membrane concentration, acidification, sulfonation, polymerization and the like, and is compounded with a leveling agent XP-50 and a leveling agent AEO-3 to obtain the sodium lignosulfonate dye dispersing agent with low surface tension, so that the sanding time of the dye can be greatly shortened, the sanding effect is improved, the high-temperature dispersibility of the dye is improved, and the dyeing performance is improved.
Drawings
FIG. 1 is a structural view of a polymerization reactor of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a side view of a column, a moving cylinder and a stirring paddle mounting structure of a polymerization reactor.
In the figure: the device comprises a kettle body 1, a connecting rod 11, a first motor 12, a second motor 13, a column barrel 2, a through groove 21, a sealing ring 22, a middle shaft 3, a screw rod part 31, an end shaft part 32, a moving barrel 4, a barrel part 41, a connecting part 42, a first through hole 43, an end cover part 44, a second through hole 45, a side shaft 5, a stirring paddle 6, a stirring blade 7, a chain wheel structure 8, a gear 81, a chain 82, a bevel gear structure 9, an A bevel gear 91 and a B bevel gear 92.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
example 1
A preparation method of a modified sodium lignosulfonate dye dispersing agent specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) sulfonating lignin and sodium sulfite at 80 ℃ for 4h, conveying the material liquid to a polymerization reaction kettle after reaction, adding formaldehyde, stirring and reacting at 80 ℃ for 4h, heating to 100 ℃, and continuing stirring and reacting for 7h to obtain sodium lignosulfonate; wherein the mass ratio of the lignin to the sodium sulfite to the formaldehyde is 1: 0.8: 0.3.
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant, wherein the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 28% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 1.
Example 2
A preparation method of a modified sodium lignosulfonate dye dispersing agent specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) sulfonating lignin and sodium sulfite at 60 ℃ for 5h, conveying the material liquid to a polymerization reaction kettle after reaction, adding formaldehyde, stirring at 60 ℃ for 5h, heating to 100 ℃, and continuing stirring for 8h to obtain sodium lignosulfonate; wherein the mass ratio of the lignin to the sodium sulfite to the formaldehyde is 1: 1: 0.4.
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant, wherein the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 15% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 2.
Example 3
A preparation method of a modified sodium lignosulfonate dye dispersing agent specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) sulfonating lignin and sodium sulfite at 90 ℃ for 3h, conveying the material liquid to a polymerization reaction kettle after reaction, adding formaldehyde, stirring at 90 ℃ for 3h, heating to 100 ℃, and continuing stirring for 6h to obtain sodium lignosulfonate; wherein the mass ratio of the lignin to the sodium sulfite to the formaldehyde is 1: 0.5: 0.3.
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant, wherein the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 10% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 3.
Example 4
A preparation method of a modified sodium lignosulfonate dye dispersing agent specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) sulfonating lignin and sodium sulfite at 70 ℃ for 4h, conveying the material liquid to a polymerization reaction kettle after reaction, adding formaldehyde, stirring and reacting at 70 ℃ for 4h, heating to 100 ℃, and continuing stirring and reacting for 8h to obtain sodium lignosulfonate; wherein the mass ratio of the lignin to the sodium sulfite to the formaldehyde is 1: 0.7: 0.4.
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant, wherein the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 32% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 1.
Example 5
A preparation method of a modified sodium lignosulfonate dye dispersing agent specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) sulfonating lignin and sodium sulfite at 90 ℃ for 3h, conveying the material liquid to a polymerization reaction kettle after reaction, adding formaldehyde, stirring at 90 ℃ for 3h, heating to 100 ℃, and continuing stirring for 5h to obtain sodium lignosulfonate; wherein the mass ratio of the lignin to the sodium sulfite to the formaldehyde is 1: 0.7: 0.2.
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant, wherein the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 40% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 2.
The molecular weight distribution and the surface tension test of the products prepared in the above examples respectively show that the molecular weight distribution of each modified sodium lignosulfonate dye dispersant is relatively narrow, and the surface tensions of the modified sodium lignosulfonate dye dispersants are respectively 18.7mN/m, 18.4mN/m, 18.1mN/m, 18.5mN/m and 18.3mN/m under the mass concentration of 1%.
Sanding the product prepared in the embodiment and a commercially available sodium lignosulfonate dispersant with the same dye filter cake (commercially available sodium lignosulfonate), performing a high-temperature dispersibility test on the sanded material, and simultaneously determining the time for achieving a standard sanding effect and the content of insoluble substances after sanding; the dye uptake and leveling property of the products obtained in the examples and the commercially available sodium lignosulfonate dispersant were also tested, and the results are shown in Table 1.
TABLE 1
The stirring of present polymerization cauldron is mostly single stirring, is the rotatory stirring in plane moreover, has the stirring inhomogeneous, the poor problem of mass transfer heat transfer effect at the in-process of stirring, has influenced the conversion rate of reaction and the homogeneity of product molecular weight greatly, influences finished product quality.
As shown in figures 1-3, the polymerization reaction kettle used in each embodiment of the invention comprises a kettle body 1 and a stirring mechanism arranged in the kettle body 1, the stirring mechanism comprises a column casing 2 fixed in the kettle body 1, a middle shaft 3 which passes through the column casing 2 in a rotating way, a shift cylinder 4 arranged in the column casing 2 in a rotating way, a pair of side shafts 5 which are arranged in the shift cylinder 4 in a rotating way and are connected in a transmission way, a pair of stirring paddles 6 which can rotate and move up and down at the same time, and a stirring blade 7 fixed at the lower end of the middle shaft 3, the movable cylinder 4 comprises a cylinder part 41 and a connecting part 42 connected with the inner wall of the cylinder part 41, the middle shaft 3 is in threaded connection with the connecting part 42 and drives the movable cylinder 4 to move up and down through the connecting part 42, the pair of side shafts 5 are distributed on two sides of the middle shaft 3 and respectively penetrate through the connecting part 42, the pair of stirring paddles 6 respectively penetrate through the column cylinder 2 and are correspondingly and rotatably installed on the cylinder part 41, and the pair of stirring paddles 6 are correspondingly and vertically connected with the pair of side shafts 5 in a transmission mode.
The middle shaft 3 is driven by a first motor 12 to rotate alternately in forward and reverse directions. The middle shaft 3 comprises a wire rod part 31 and end shaft parts 32 connected to two ends of the wire rod part 31, the end shaft parts 32 located on the upper portion penetrate through the top of the column casing 2 and are connected with the first motor 12 behind the top of the kettle body 1, and the end shaft parts 32 located on the lower portion penetrate through the bottom of the column casing 2 in a rotating mode. The end shaft part 32 located at the upper part is rotationally connected with the top of the kettle body 1 through a bearing, and the end shaft part 32 located at the lower part is rotationally connected with the bottom of the column casing 2 through a bearing.
The connecting portion 42 is provided in the middle of the cylindrical portion 41, and the connecting portion 42 is provided with a first through hole 43 through which the side shaft 5 passes. The shift cylinder 4 further comprises end cover parts 44 arranged at two ends of the cylinder part 41, and the side shaft 5 is rotatably arranged on the end cover parts 44 at two ends. The end cover part 44 is provided with a second through hole 45 for the middle shaft 3 to pass through.
The pair of side shafts 5 are in transmission connection through a chain wheel structure 8, wherein one side shaft 5 is driven to rotate through a second motor 13. The sprocket structure 8 includes gears 81 fixed to the pair of side shafts 5, respectively, and a chain 82 connecting the two gears 81.
The cylindrical shell 2 is symmetrically provided with through grooves 21, the shaft parts of the stirring paddles 6 penetrate through the through grooves 21 and are mounted to the cylindrical part 41, the stirring paddles 6 move up and down in the range of the through grooves 21 along with the moving barrel 4, and the stirring paddles 6 are in transmission connection with the side shaft 5 through bevel gear structures 9. The bevel gear structure 9 comprises an A bevel gear 91 fixed on the side shaft 5 and a B bevel gear 92 fixed on the shaft part of the stirring paddle 6, and the A bevel gear 91 is meshed with the B bevel gear 92.
The cylinder part 41 and the peripheral edge of the through groove 21 are sealed by a sealing ring 22, so that reaction materials are prevented from entering the column casing 2 in the process of moving the movable casing 4 up and down. The two ends of the column casing 2 are of detachable fixing structures, so that the components in the column casing 2 can be conveniently installed.
The upper end of the column casing 2 is fixed to the top of the kettle body 1, and the lower end of the column casing 2 is connected to the inner wall of the lower part of the kettle body 1 through a connecting rod 11.
When the first motor 12 drives the middle shaft 3 to rotate in a positive and negative alternate mode, the stirring blade 7 is driven to rotate, stirring of reaction materials is achieved, meanwhile, the middle shaft 3 rotates in a positive and negative alternate mode to drive the moving barrel 4 to move up and down, the stirring paddle 6 is further driven to move up and down, the second motor 13 drives the stirring paddle 6 to rotate in the horizontal direction through the side shaft 5, therefore, the stirring paddle 6 moves up and down while stirring is carried out in a horizontal rotation mode, full and uniform stirring is achieved, mass transfer and heat transfer processes of the reaction materials are improved, and the reaction materials are beneficial to being reversely rotatedThe reaction is smoothly carried out, the reaction conversion rate and the uniformity of the molecular weight of the product are improved, and the product quality is improved. The modified sodium lignosulfonate dye dispersant was prepared as in example 1, but using the existing polymer reactor, it was found that the resulting dispersant had a lower uniformity of molecular weight distribution than the modified sodium lignosulfonate dispersant prepared in example 1, and it was reduced in dye uptake and leveling property (dye uptake of 80.6%, leveling property of 5.72X 10) as a dye dispersant for dye dyeing (dye uptake of 80.6%, leveling property of 5.72X 10)2)。
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A preparation method of a modified sodium lignosulfonate dye dispersant is characterized by comprising the following steps: the sodium lignosulfonate dye dispersant is prepared by compounding sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3.
2. The preparation method of the modified sodium lignosulfonate dye dispersant of claim 1, wherein: the sodium lignosulfonate is prepared by sulfonating and polymerizing lignin extracted from papermaking black liquor.
3. The preparation method of the modified sodium lignosulfonate dye dispersant of claim 2, wherein: the papermaking black liquor is subjected to membrane concentration and acid precipitation treatment to prepare the high-purity lignin.
4. The preparation method of the modified sodium lignosulfonate dye dispersant of claim 1, wherein: the addition amount of the leveling agent XP-50 and the leveling agent AEO-3 accounts for 10-40% of the total mass of the modified sodium lignosulfonate dye dispersant, and the molar ratio of the leveling agent XP-50 to the leveling agent AEO-3 is 1: 1-3.
5. The method for preparing the modified sodium lignosulfonate dye dispersant of any one of claims 1 to 4, wherein: the method specifically comprises the following steps:
(a) precipitating, filtering and removing impurities from the papermaking black liquor, concentrating the filtrate through membrane treatment, and then performing acid precipitation and filter pressing treatment to obtain high-purity lignin;
(b) carrying out sulfonation reaction on lignin and sodium sulfite, conveying the material liquid to a polymerization reaction kettle after the reaction, adding formaldehyde, and stirring for reaction to obtain sodium lignosulfonate;
(c) uniformly mixing sodium lignosulfonate with a leveling agent XP-50 and a leveling agent AEO-3 in proportion to obtain a finished product of the sodium lignosulfonate dye dispersant.
6. The method for preparing the modified sodium lignosulfonate dye dispersant of claim 5, wherein: in the step (b), the temperature of the sulfonation reaction is 60-90 ℃, and the time of the sulfonation reaction is 3-5 h.
7. The method for preparing the modified sodium lignosulfonate dye dispersant of claim 5, wherein: in the step (b), formaldehyde is added into the polymerization reaction kettle, then the mixture reacts for 3 to 5 hours at the temperature of between 60 and 90 ℃, and the temperature is raised to 100 ℃ for continuous reaction for 5 to 8 hours.
8. The method for preparing the modified sodium lignosulfonate dye dispersant of claim 5, wherein: in the step (b), the mass ratio of the lignin to the sodium sulfite and formaldehyde is 1: (0.5-1): (0.2-0.4).
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| CN107974102A (en) * | 2017-10-30 | 2018-05-01 | 安徽凯奇化工科技股份有限公司 | A kind of composite disperse orange dye |
| CN108912838A (en) * | 2018-06-05 | 2018-11-30 | 深圳市墨库图文技术有限公司 | Disperse dyes black color paste and preparation method thereof |
| CN108671794A (en) * | 2018-07-05 | 2018-10-19 | 刘雪松 | A kind of cleaning agent mixed stirring device |
| CN109384938A (en) * | 2018-10-31 | 2019-02-26 | 张飞 | The method and its application of sodium lignin sulfonate are prepared using black liquid |
| CN109179845A (en) * | 2018-11-16 | 2019-01-11 | 河南省科学院化学研究所有限公司 | A kind of disposal of resources method of sulfate method pulp black liquor |
| CN111138886A (en) * | 2019-12-26 | 2020-05-12 | 东华大学 | Liquid disperse dye and preparation method and application thereof |
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