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Preparation method of high effective retention and filtration agent cationic guar gum

A technology of cationic guar gum and retention and drainage aids, applied in the field of analytical biology, can solve the problems of insignificant retention and drainage effects, large usage, low substitution degree, etc., achieve good retention and drainage effects, improve The effect of mild retention and etherification reaction conditions

Inactive Publication Date: 2010-02-17
WUXI JINXIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many related literature reports on cationic modification of guar gum, but its defects of low degree of substitution, large amount of use, and inconspicuous retention and drainage effects limit its wider application.

Method used

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  • Preparation method of high effective retention and filtration agent cationic guar gum
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Examples

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Effect test

Embodiment 1

[0021] The preparation method of the cationic guar gum of the high-efficiency retention and drainage aid of the present invention adopts the following process steps:

[0022] 0.5Kg of potassium hydroxide is added to 100Kg of guar collagen powder and prepared into a solution during use with a mass concentration of 10%-60%. Alkalinize at 20°C for 30 minutes, then add 10Kg of cationic etherification agent 3-chloro-2-hydroxypropyl dodecyl dimethyl ammonium chloride, raise the temperature to 60°C, add potassium chloride at 0.5Kg React for 1h under the action of the reaction, cool down after the reaction, and neutralize with dilute hydrochloric acid with a mass concentration of 10%. The crude product after neutralization enters the airflow dryer and is dried at 105°C for 5min. The dry material after drying contains water The rate is 10%. After drying and dehumidifying, the intermediate product has a fineness of 100 mesh after being pulverized by a pulverizer, and is sieved by a vibr...

Embodiment 2

[0024] The preparation method of the cationic guar gum of the high-efficiency retention and drainage aid of the present invention adopts the following process steps:

[0025] Add 1Kg of sodium hydroxide to 100Kg of guar collagen powder, and prepare a solution during use, with a mass concentration of 10%-60%. Alkaline at 30°C for 10 minutes, then add 20Kg of cationic etherification agent 2,3-epoxypropyltrimethylammonium chloride, heat up to 65°C, and react for 1.5h under the action of 4Kg of auxiliary agent sodium chloride , cool after the reaction, and neutralize with 50% acetic acid. The neutralized crude product enters the airflow dryer and is dried at 130°C for 2 minutes. The moisture content of the dry material after drying is 8%. After drying The intermediate product after dehumidification is pulverized by a pulverizer and the fineness reaches 100 mesh, and is sieved by a vibrating sieve to obtain an efficient retention and drainage aid cationic guar gum.

Embodiment 3

[0027] The preparation method of the cationic guar gum of the high-efficiency retention and drainage aid of the present invention adopts the following process steps:

[0028] Add 4Kg of sodium hydroxide to 100Kg of guar collagen powder, and prepare a solution during use with a mass concentration of 10%-60%. Alkaline at 40°C for 60 minutes, then add 30Kg of cationic etherification agent 3-chloro-2-hydroxypropyltrimethylammonium chloride, heat up to 80°C, and react for 4 hours under the action of 6Kg of auxiliary agent potassium chloride , cool after the reaction, and neutralize with 30% acetic acid. The neutralized crude product enters the airflow dryer and is dried at 115°C for 10 minutes. The moisture content of the dry material after drying is 10%. After drying The intermediate product after dehumidification is pulverized by a pulverizer and the fineness reaches 100 mesh, and is sieved by a vibrating sieve to obtain an efficient retention and drainage aid cationic guar gum.

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Abstract

The invention relates to a preparation method of a high effective retention and filtration agent cationic guar gum, belongs to the technical field of analytical biotechnology. The method comprises thefollowing steps: taking guar gum to perform alkalinizing, etherifying, cooling and neutralizing, crushing and drying, grinding and sieving and packaging, and finally obtaining the high effective retention and filtration agent cationic guar gum. The invention adopts low temperature alkalization so as to increase the viscosity of the cationic guar gum product, the reaction condition of etherification is mild; the product has high cationic substituted ratio, can interact well with negative fibre and filler particles so as to increase the retention and filtration effect of fibre and filler and reach good retention and filtration effect by using a little product, and is a high effective retention and filtration agent.

Description

technical field [0001] The invention relates to a preparation method of cationic guar gum, a high-efficiency retention and drainage aid, and belongs to the field of analytical biotechnology. Background technique [0002] Guar gum is a highly purified natural polysaccharide extracted from guar beans, a leguminous plant widely planted in the Indian-Pakistan subcontinent. Guar gum is a non-ionic polysaccharide in terms of molecular structure. It uses polymannose as the molecular backbone, and D-mannopyranose units are connected by β(1-4) glycosidic bonds. D-galactopyranose is linked to polymannose main chain by α(1-6) bond. The ratio of mannose to galactose units in guar gum is 2:1, that is, every other mannose unit is connected with a galactose branch, and the structural formula is shown below. [0003] [0004] Relative molecular mass 2.0×10 5 ~3.0×10 5 [0005] It is reported in the literature that the molecular weight of guar gum is around 220,000. The biggest feat...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30
Inventor 谈玉琴许超张荣
Owner WUXI JINXIN GRP CO LTD
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