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: 2005-05-04
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

[0042] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0043] 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:

[0044] Water molecule volatiles: ethanol, ether, water: 0.01; free quinone content: concentrated sulfuric acid, carbon tetrachloride: 0.25%; active substance content: alkaline sodium nitrite: 0.15%.

[0045] 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

[0047] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0048] Sodium salicylate: 9%, anionic silicic acid softener: 5%, cooking aid: 7%, chlorine liquid (gas) 3.7%; the balance is water. Among them, cooking aids are:

[0049] Water molecule volatiles: ethanol, ether, water: 5%; free quinone content: concentrated sulfuric acid, carbon tetrachloride: 35%; active substance content: alkaline sodium nitrite: 30%.

[0050] The above-mentioned raw materials are put into the reactor, and after 4 hours of mixing reaction, the clean pulping catalyst of the present invention is obtained.

Embodiment 3

[0052] The raw material formula (percentage by weight) of clean pulping catalyst of the present invention is:

[0053] Sodium salicylate: 6%; anionic silicic acid softener: 3%; cooking aid: 4%; chlorine liquid (gas): 2.9%; the balance is water. Among them, cooking aids are:

[0054] Water molecule volatiles: ethanol, ether, water: 3%; free quinone content: concentrated sulfuric acid, carbon tetrachloride: 30%; active substance content: alkaline sodium nitrite: 25%.

[0055] 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 present invention relates to a catalyzer for clean pulping and process for using the same. The composition of the catalyzer for clean pulping according to the present invention includes sodium salicylate, anion silicic acid softener, cooking aids, liquid(gaseous) chlorine and water. The process for using the catalyzer for clean pulping according to the present invention includes the following steps: 1, cutting and impurities removing for the raw material, 2, feed preparation and impurities removing, 3, dividing into fibers by refining, 4, catalysis copolymerization, 5, refining, 6, concentration and separation 7, pulp bleaching, 8, pulp washing and 9, finished pulp. All kinds of the herbs can be used for the raw material. The advantages of the present invention is shown as the following: it realizes the clean production; it does not need to digest and does not produce black liquor; the process is simple and is performed at normal temperature; the resource of crops is fully used; the effect of water conservation is remarkable; it can easily realize continuous production, modularization production and automatization 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 materials. 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 Applications(China)
IPC IPC(8): D21B1/00D21C3/20D21C3/22D21H17/12D21H17/13
Inventor 程相武
Owner 程相武
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