Composite bactericide for paper making white water

A paper-making white water and composite technology, which is applied in the direction of paper, etc., can solve the problems of high irritation of organic bromine compounds, easy to corrode equipment, and difficult to decompose, and achieve the effects of inhibiting growth and reproduction, not corroding equipment, and fast penetration speed

Inactive Publication Date: 2011-06-08
广东省石油化工研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most effective way to solve the microbial problems in the papermaking process is to add fungicides to the papermaking white water. The fungicides used in most paper mills are organometallic compounds, organic bromine and oxidizing fungicides. The organometallic compounds are highly toxic and difficult to Decomposition, use has been banned, organic bromine compounds are highly irritating, not an ideal choice, and oxidized compounds are easy to corrode equipment, and will consume other papermaking additives, etc.

Method used

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  • Composite bactericide for paper making white water
  • Composite bactericide for paper making white water
  • Composite bactericide for paper making white water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composite fungicide used for papermaking white water system described in this embodiment: the composition of its weight percentage is as follows:

[0018] 5-chloro-2-methylisothiazolin-3-one 2.7%, 2-methylisothiazolin-3-one 1.5%, polyhexamethylene monoguanidine hydrochloride 5% fungicide aqueous solution.

[0019] Its preparation method is: take 60kg of isothiazolinone derivatives respectively (5-chloro-2-methylisothiazolin-3-one, the mixed aqueous solution of 2-methylisothiazolin-3-one, the following examples are the same as ), 10kg of polyhexamethylene monoguanidine hydrochloride and 130kg of water are evenly mixed.

[0020] The application test was carried out on the 2350 paper machine of a paper mill in Hunan. The paper machine mainly uses wood pulp and reed pulp as raw materials, and produces 48-140g / m 2 For industrial coated base paper, the speed is 150-300m / min. The fungicide is added in front of the starch pool and the round sieve, and the interval-type au...

Embodiment 2

[0026] The composite fungicide used for papermaking white water system described in this embodiment: the composition of its weight percentage is as follows:

[0027] 5-chloro-2-methylisothiazolin-3-one 1.4%, 2-methylisothiazolin-3-one 0.8%, polyhexamethylene biguanide hydrochloride 15% fungicide aqueous solution.

[0028] 30 kg of the above isothiazolinone derivatives, 30 kg of polyhexamethylene biguanide hydrochloride and 140 kg of water were respectively taken and mixed uniformly.

[0029] The application test was carried out on the 1760 paper machine of a paper mill in Henan. This machine uses wood pulp and straw pulp as raw materials and produces 58-112g / m 2 High-white double-adhesive paper, the speed is 150-220 m / min. After alkaline washing, replace it with a compound fungicide, add it to the white water pool, and use impact-type automatic metering and dosing, dosing three times a day, one time lasts 15 minutes, and the flow rate is 80ml / min.

[0030] Test results Micro...

Embodiment 3

[0034] The composite fungicide used for papermaking white water system described in this embodiment: the composition of its weight percentage is as follows:

[0035] 5-Chloro-2-methylisothiazolin-3-one 1.8%, 2-methylisothiazolin-3-one 1.0%, polyhexamethylene monoguanidine phosphate 10% fungicide aqueous solution.

[0036] Take 40kg of the above isothiazolinone derivatives, 20kg of polyhexamethylene monoguanidine phosphate and 140kg of water and mix uniformly.

[0037] The application experiment was carried out on the 2640 paper machine of a paper mill in Henan, and the paper produced by the paper machine was 68g / m 2 Cultural double-adhesive paper, the type of pulp is wood and straw pulp, the speed is 480-530 m / min, the daily output of the paper machine is 120 tons, the dosing point is the white water pool, dosing three times a day, one time lasts 15 minutes, and the flow rate is 320ml / min.

[0038] Test results Microorganisms of the paper machine: (Tested with 3MPetuifilm t...

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Abstract

The invention provides a composite bactericide for paper making white water. The bactericide comprises the following components in percentage by weight: 0.9 to 2.7 percent of 5-chloro-2-methyl isothiazolizone-3-ketone, 0.5 to 1.5 percent of 2-methyl isothiazolizone-3-ketone and 5 to 20 percent of polyhexamethylene guanidine. After the bactericide is added into a white water system, various microorganisms in paper pulp and the white water system can be killed quickly, the formation of biological fouling in a circulating system can be restrained for a long time, slime pulp defects such as spots, pores, broken ends and the like caused by microorganisms on a paper sheet are effectively overcome, and machine halt vehicle brushing frequencies are lowered.

Description

technical field [0001] The invention relates to an industrial bactericide, in particular to a composite bactericide used in papermaking white water system. Background technique [0002] As we all know, the paper industry consumes a lot of water and the sewage is directly discharged, which not only wastes a lot of water resources and paper-making raw material additives, but also causes huge pollution to the environment due to the direct discharge of a large amount of fibers and additives. The development of modern papermaking technology, the use of advanced High-speed paper machines and closed white water circulation technology have improved production efficiency, improved product quality, and reduced clean water consumption and sewage discharge; The continuous accumulation of organic residues in the white water system, coupled with the growth and reproduction of harmful microorganisms, forms viscous microbial slime, which settles or adheres to the wall of the paper machine e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/36
Inventor 陈小丹汤小燕杨伟和栾安博邱美坚黄奇然赵天翼
Owner 广东省石油化工研究院
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