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Strong-alkali-resistant cleaning pulping aid and application

A technology of clean pulping and strong alkali resistance, applied in the field of papermaking and pulping, can solve the problems of intolerant alkali, too much foam, affecting the efficiency of dispersion and penetration, and achieve the effect of reducing interfacial tension and improving product quality

Active Publication Date: 2014-05-21
天津市慧珍科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the surfactants with sodium hydroxide are anionic surfactants, which are generally not resistant to strong alkalis, which affects their dispersion and penetration performance
[0005] In the invention patent application of application number 200710012220.6 "Method for Pulping with Rice-Wheat Straw Active Agent", a pulping auxiliary agent is disclosed. The auxiliary agent cooperates with sodium hydroxide to reduce the amount of alkali used for cooking rice-wheat straw. However, due to the selected surface The active agent is anionic, and there are many foams, which will affect the production

Method used

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  • Strong-alkali-resistant cleaning pulping aid and application
  • Strong-alkali-resistant cleaning pulping aid and application
  • Strong-alkali-resistant cleaning pulping aid and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a prepare synthetic nonionic surfactant:

[0030] Raw materials (by weight, 1 kg per weight part, the same below):

[0031] Synthetic alcohol 4, ethylene oxide n10, propylene oxide m10.

[0032] Processing method: first add synthetic alcohol and catalyst into a high-pressure stainless steel kettle, then weigh ethylene oxide and propylene oxide according to the formula and mix them, then drop the mixed ethylene oxide and propylene oxide into the sample, Raise the temperature to 110-130°C for reaction, the reaction time is 1-5h, and finally cool down and discharge the material, and then carry out sulfonation and neutralization by conventional methods to obtain the target product. The catalyst is potassium hydroxide, and the consumption is 0.3% of the total weight of the synthetic nonionic surfactant material.

[0033] b Preparation of strong alkali-resistant cleaning pulping aid:

[0034] Raw materials (by weight, 1 kg per weight part, the same below):

[0035] Synthe...

Embodiment 2

[0038] a prepare synthetic nonionic surfactant:

[0039] Raw materials: synthetic alcohol 6, ethylene oxide n15, propylene oxide m15.

[0040] Processing method is identical with embodiment 1.

[0041] b Preparation of strong alkali-resistant cleaning pulping aid:

[0042] Raw materials: synthetic nonionic surfactant 7, sodium lignosulfonate 8, aluminum sulfate 15, metaphosphate 7, magnesium sulfate 65.

[0043] Processing method: mix the above raw materials evenly.

Embodiment 3

[0045] a prepare synthetic nonionic surfactant:

[0046] Raw materials: synthetic alcohol 10, ethylene oxide n30, propylene oxide m30.

[0047] Processing method is identical with embodiment 1.

[0048] b Preparation of strong alkali-resistant cleaning pulping aid:

[0049] Raw materials: synthetic nonionic surfactant 10, sodium lignosulfonate 10, aluminum sulfate 30, metaphosphate 15, magnesium sulfate 80.

[0050] Processing method: mix the above raw materials evenly.

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Abstract

The invention discloses a strong-alkali-resistant cleaning pulping aid and an application of the strong-alkali-resistant cleaning pulping aid. The strong-alkali-resistant cleaning pulping aid comprises the following components in parts by weight: 1-10 parts of a synthetic nonionic surfactant, 5-10 parts of sodium lignin sulfonate, 10-30 parts of aluminum sulfate, 1-15 parts of metaphosphate and 50-80 parts of magnesium sulfate, wherein the synthetic nonionic surfactant comprises the following components in parts by weight: 4-10 parts of synthol, 10-30 parts of ethylene oxide n and 10-30 parts of propylene epoxide m. The aid is a composite aid; the interfacial tension can be remarkably reduced in strong alkali by virtue of an active agent, so that alkali and an oxidizing agent more easily enter a fiber and react with lignin; meanwhile, dissolution of generated substances is facilitated; the aid is applied to processes for various plant fiber pulps such as wheat straws, rice straws, cotton stalks, reeds, bamboos, pennisetum hydridum, bagasse and wood, and is particularly applied to a cleaning pulping process which does not generate black liquor and does not contain a chlorine bleaching agent. According to the aid, various technical indexes of the process can be promoted to be comprehensively realized, and the product quality is remarkably improved.

Description

technical field [0001] The invention belongs to papermaking and pulping, in particular to a strong alkali-resistant cleaning pulping auxiliary agent and its application. Background technique [0002] Fiber raw materials used in papermaking include wood, wheat straw, straw, cotton stalks, reeds, bamboo, bamboo grass, bagasse, etc. Pulping is a process of dissociating fibers by means of chemical and physical methods. According to different combinations of these two types of methods, various pulps such as chemical pulp, mechanical pulp, chemomechanical pulp, and semi-chemical pulp have been produced. [0003] At present, in the production of domestic pulp, whether it is chemical method or physical method, sodium hydroxide is still used as the main method together with auxiliary agents such as surfactants to cook the fiber raw materials. With the help of the auxiliary agent, the diffusion and penetration of sodium hydroxide are accelerated. The fiber raw material becomes soft, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/22D21H21/24
Inventor 张克贤武晶晶
Owner 天津市慧珍科技有限公司