Clean pulping catalyst and its application process

A clean pulping and catalyst technology, applied in the direction of organic solvent pulping, cellulose raw material pulping, non-fibrous pulp addition, etc., can solve problems that cannot be completely solved, unaffordable by enterprises, huge one-time investment in alkali recovery, etc. , to achieve the effect of preventing air pollution and waste of resources, reducing fixed investment and operating costs, and easy modular expansion

Inactive Publication Date: 2005-08-24
程相武
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the one-time investment of alkali recovery is particularly huge, which is unbearable for ordinary enterprises, and it cannot completely solve the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0044] Sodium salicylate: 5%, anionic silicic acid softener: 2%, cooking aid: 3%, chlorine liquid (gas) 2.1%; the balance is water. Among them, cooking aids are:

[0045] Water molecule volatiles include: ethanol and / or ether: 0.01%; free quinones include: concentrated sulfuric acid and / or carbon tetrachloride: 0.25%; active substances: alkaline sodium nitrite: 0.15%; the balance is water.

[0046] The cooking aid is a solution in which the raw material of the cooking aid is made into a 3% emulsion and then added into pure water.

[0047] The above-mentioned raw materials are put into the reactor, and after 3.5 hours of mixing reaction, the clean pulping catalyst of the present invention is obtained.

Embodiment 2

[0049] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0050] Sodium salicylate: 9%, anionic silicic acid softener: 5%, cooking aid: 7%, chlorine liquid (gas) 3.7%; the balance is water. Wherein, described cooking aid is:

[0051] Water molecule volatiles include: ethanol and / or ether: 5%; free quinones include: concentrated sulfuric acid and / or carbon tetrachloride: 35%; active substances: alkaline sodium nitrate: 30%; the balance is water.

[0052] The above-mentioned raw materials are put into the reactor, and after 4 hours of mixing and reaction, the clean pulping catalyst of the present invention is obtained.

Embodiment 3

[0054] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0055] Sodium salicylate: 6%; anionic silicic acid softener: 3%; cooking aid: 4%; chlorine liquid (gas): 2.9%; the balance is water. Wherein, described cooking aid is:

[0056] Water molecule volatiles include: ethanol and / or ether: 3%; free quinones include: concentrated sulfuric acid and / or carbon tetrachloride: 30%; active substances: alkaline sodium nitrate: 25%; the balance is water.

[0057] The above-mentioned raw materials are put into the reactor, and after 5 hours of mixing reaction, the clean pulping catalyst of the present invention is obtained.

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Abstract

The invention relates to a clean pulping catalyst and its application process. The clean pulping catalyst of the present invention is composed of the following raw materials: sodium salicylate, anionic silicic acid softener, cooking aid, chlorine (gas) and water. The application process of the clean pulping catalyst of the present invention includes the following steps: 1. Crushing and removing impurities from raw materials; 2. Prepare materials and remove impurities; 3. Combing and splitting; , pulp bleaching; 8, pulp washing; 9, finished pulp. Various herbaceous fiber plants can be used as raw materials. The advantages of the present invention are: the present invention realizes clean production, it does not need cooking, does not produce black liquor; its process is simple; it can be carried out under normal temperature and pressure; fully utilizes crop resources; water saving is obvious: it is easy to realize continuous production, Modular production and automatic production, and can realize industrialization.

Description

technical field [0001] The invention relates to a catalyst and its application process. Specifically, it relates to a clean pulping catalyst and its application process. Background technique [0002] Utilizing wheat straw to make pulp and paper is a characteristic of our country, while abroad it is mostly wood pulp. For a long time, my country's papermaking industry has always used non-wood fiber as the main raw material, and straw pulp accounts for 80% of the papermaking raw material. In particular, the northern provinces are rich in wheat straw resources and low in price, which is a major advantage in straw pulp papermaking. At present, the main processes of wheat straw pulping in my country include caustic soda method, sulfate method, ammonia method, etc., and caustic soda method is the main one. The fatal defect in the existing pulping technology is that a large amount of alkali-containing black liquor is produced, which seriously pollutes the environment and is very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/00D21C3/20D21C3/22D21H17/12D21H17/13
Inventor 程相武
Owner 程相武
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