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Pretreatment liquid of cotton rod boiling

A pretreatment liquid and cotton stalk technology, which is applied in the field of cotton stalk papermaking cooking pretreatment liquid, can solve the problems of difficult bleaching, high cost, long cycle, etc., and achieve the effect of increasing the yield of fine pulp

Inactive Publication Date: 2007-12-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Production of bleached cotton stalk pulp does not work well with traditional cooking methods and is difficult to bleach
Using microbial pretreatment technology, the cycle is long and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] After the cotton stalks are prepared, add them to the pretreatment solution containing 3% by weight of sodium hydroxide and 0.05% by weight of sodium borohydride, treat at 90°C for 30 minutes, squeeze out the pretreatment solution, and then add caustic soda-anthracene Distilled in the quinone cooking liquid, and then pulped according to the conventional method.

[0011] After testing: the yield of fine pulp is increased by 6%, the brightness can be increased by 8.2% ISO, and the kappa number is reduced by 5.8. (Compared with the quality of cotton stalk pulp obtained by cooking with conventional caustic soda-anthraquinone method, the yield of fine pulp is 35.5%, the whiteness of unbleached pulp is 19.5% ISO, and the kappa number is 20.66. The same below).

Embodiment 2

[0013] After the cotton stalks are prepared, add them to the pretreatment liquid containing 1% by weight of sodium hydroxide and 0.01% by weight of sodium borohydride, treat at 90°C for 30 minutes, then extrude the pretreatment liquid, and then add caustic soda-anthracene Distilled in the quinone cooking liquid, and then pulped according to the conventional method.

[0014] After testing: the yield of fine pulp is increased by 4%, the brightness can be increased by 7.2% ISO, and the kappa number is reduced by 7.8.

Embodiment 3

[0016] After the cotton stalks are prepared, add them to the pretreatment solution containing 4% by weight of sodium hydroxide and 0.4% by weight of sodium borohydride, treat at 90°C for 30 minutes, then extrude the pretreatment solution, and then add caustic soda-anthracene Distilled in the quinone cooking liquid, and then pulped according to the conventional method.

[0017] After testing: the yield of fine pulp increases by 1%, the whiteness can be increased by 13.2% ISO, and the Kappa number is reduced by 9.8.

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Abstract

This invention relates to a cotton pole paper making boiling preprocessing liquid. The character of this invention is that the liquid contains 1-5% sodium hydroxide by weight , 0.01-0.5% natrium borohydride by weight. After the cotton pole boiling preprocessing liquid of this invention does pretreatment on the cotton pole, compraring to the regular paper pulp, the minute pulping rate is improved by 1-6%, the white rate can be improved by 8-15%ISO, and the kappa number drops to 6-10.

Description

(1) Technical field [0001] The invention relates to a papermaking cooking pretreatment liquid, in particular to a cotton stalk papermaking cooking pretreatment liquid. (2) Background technology [0002] The production of bleached cotton stalk pulp does not work well with traditional cooking methods and is difficult to bleach. Using microbial pretreatment technology, the cycle is long and the cost is high. (3) Contents of the invention [0003] In order to overcome the deficiencies of the above technologies, the present invention provides a cotton stalk cooking pretreatment liquid, which has the characteristics of low cost, simple production process, good bleaching effect and high pulp yield. [0004] The present invention is achieved through the following measures: [0005] The invention relates to a pretreatment liquid for cooking cotton stalks, which is particularly characterized in that it contains 1-5% by weight of sodium hydroxide and 0.01-0.5% by weight of sodium b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C1/06
Inventor 王权王键
Owner QILU UNIV OF TECH
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