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Synergist added to papermaking wet end and preparation method of synergist

A technology for synergists and wet ends, which is applied in the field of synergists added to the wet end of papermaking and its preparation, can solve the problems of complex chemical balance in the wet end, interference with the destruction of chemical auxiliary agents in the wet end, and the decline in paper-forming performance. Improve retention and drainage efficiency, reduce production costs, and improve performance effects

Inactive Publication Date: 2019-03-08
JIANGMEN GAOLIYI TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the chemical balance of the wet end becomes complicated, and the interfering substances destroy the chemical additives in the wet end, reducing the performance of the paper

Method used

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  • Synergist added to papermaking wet end and preparation method of synergist

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Effect test

Embodiment 1

[0044] This embodiment 1 provides a preparation method of a synergist added to the wet end of papermaking, which includes the following steps:

[0045] In a 1000L reactor, add 52.5kg of acrylamide, dissolve it with 421.6kg of pure water, then add 19.2kg of acrylic acid, 270.7kg of 60% dimethyl diallyl ammonium chloride and 0.4kg of N,N-Dimethylbisacrylamide, stir evenly, then add about 35.6kg of 30wt% sodium hydroxide solution, adjust the pH value to 6.5, then raise the temperature of the solution to 60°C, and add 8.0 g polyalkylphenol, 50g ethylene glycol, after stirring evenly, add 80g ammonium persulfate and 10g sodium bisulfite to initiate polymerization, after 3 hours of polymerization reaction, enter the aging reaction process, add 200g sodium sulfite during the aging reaction, After aging for 3 hours, it is measured and packaged, and the finished product is a viscous transparent liquid.

Embodiment 2

[0047] This embodiment 2 provides a preparation method of a synergist added to the wet end of papermaking, which includes the following steps:

[0048] In a 1000L reactor, add 96.0kg of acrylamide, dissolve it with 458.7kg of pure water, then add 19.2kg of acrylic acid, 190.1kg of 60% dimethyl diallyl ammonium chloride and 0.4kg of N,N-Dimethylbisacrylamide, stir evenly, then add about 35.6kg of 30wt% sodium hydroxide solution, adjust the pH value to 6.5, then raise the temperature of the solution to 60°C, and add 8.0 g polyalkylphenol, 50g ethylene glycol, after stirring evenly, add 80g ammonium persulfate and 10g sodium bisulfite to initiate polymerization, after 3 hours of polymerization reaction, enter the aging reaction process, add 200g sodium sulfite during the aging reaction, After aging for 4 hours, it is measured and packaged, and the finished product is a viscous transparent liquid.

Embodiment 3

[0050] This embodiment 3 provides a preparation method of a synergist added to the wet end of papermaking, which includes the following steps:

[0051] In a 1000L reactor, add 60.8kg of acrylamide, dissolve it with 422.1kg of pure water, then add 27.2kg of acrylic acid, 239.5kg of 60% dimethyl diallyl ammonium chloride and 0.4kg of N,N-Dimethylbisacrylamide, stir evenly, then add about 50.3kg of 30wt% sodium hydroxide solution, adjust the pH value to 6.5, then raise the temperature of the solution to 60°C, and add 8.0 g polyalkylphenol, 50g ethylene glycol, after stirring evenly, add 80g ammonium persulfate and 10g sodium bisulfite to initiate polymerization, after 3 hours of polymerization reaction, enter the aging reaction process, add 200g sodium sulfite during the aging reaction, After aging for 4 hours, it is measured and packaged, and the finished product is a viscous transparent liquid.

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Abstract

The invention discloses a preparation method of a synergist added to papermaking wet end. The method comprises steps as follows: amide is dissolved by pure water, unsaturated monomers or unsaturated monomer esters with anionic property, unsaturated monomers with cationic property and unsaturated monomers with cross-linking effect are added and stirred uniformly, a pH regulator is added to regulatepH value of the solution to 5.5-7.0, after the temperature of the solution is increased to 30-80 DEG C, a reaction inhibitor, a molecular weight modifier and a multicomponent composite catalyst are added, copolymerization is performed for 1-3 h, then an aging reaction process is started, a curing agent is added to the solution, and after aging, the synergist added to the papermaking wet end is obtained. According to the synergist, performance of a dry strength agent can be effectively improved, retention and filter assisting efficiency is improved auxiliarily, white water turbidity is reduced, furthermore, the synergist has non-interference to other auxiliaries, so that chemical equilibrium of the wet end tends to be stable, and damage of interfering substances to chemical auxiliaries atthe wet end is reduced.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to an auxiliary agent added to the wet end of papermaking and a preparation method thereof. Background technique [0002] The term wet-end chemistry is a technical term dedicated to the papermaking industry. It mainly discusses the filtration, retention, Formation and the law of mutual reaction and action in the process of white water circulation. The reaction result directly affects the normal operation of the paper machine and the final quality of the paper product. Chemical additives in the wet end of papermaking mainly include two categories: ① functional chemicals, such as: dry strengthening agents, wet strength agents, sizing agents, fillers and colorants, etc.; ② process chemicals, such as: retention aids, Filter aids, defoamers and preservatives, etc. [0003] In recent years, many developments in papermaking have promoted the progress of wet-end chemical process cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10D21H21/12
CPCD21H21/10D21H21/12
Inventor 张敏盛张益盛
Owner JIANGMEN GAOLIYI TECH IND
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