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Transparent guar gum and preparation method thereof

A technology of guar gum and guar gum sheet, which is applied in the field of transparent guar gum and its preparation, can solve the problems of cumbersome process, high cost, harsh raw material requirements, etc., and achieve the effect of simple preparation method

Active Publication Date: 2018-01-26
山东广浦生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, in order to facilitate the smooth progress of modification, the preparation of transparent guar gum mostly needs to use guar collagen powder after swelling, grinding and pulverizing of guar gum flakes as raw materials. The raw material requirements are harsh and the process is cumbersome.
For example, Chinese patent CN1757827A discloses a preparation method of hydroxyalkyl cationic guar gum, which uses guar collagen powder after swelling, grinding and pulverizing of guar gum sheet as raw material, which has high cost and needs to supplement hydrogen oxidation during the reaction process. Sodium solution to facilitate the modification of guar gum

Method used

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preparation example Construction

[0027] The invention provides a kind of preparation method of transparent guar gum, comprises the following steps:

[0028] (1) guar gum sheet is joined in lye, carries out alkalization reaction, obtains guar gum alkalization;

[0029] (2) the guar gum alkalization that described step (1) obtains is mixed with hydroxyalkyl etherification agent, carries out the first grafting reaction, obtains alkylation guar gum;

[0030] (3) mixing the alkylated guar gum obtained in the step (2) with the cationic etherifying agent, and carrying out the second grafting reaction to obtain the cationized guar gum;

[0031] (4) Mix the cationized guar gum that described step (3) obtains with oxidant, carry out oxidation reaction, obtain transparent guar gum.

[0032] In the invention, the guar gum flakes are added into the lye to carry out the alkalization reaction to obtain the guar gum alkalized product. The present invention has no special requirements on the source of the guar gum, and the ...

Embodiment 1

[0063] Take by weighing 150 grams of guar film and add in the reaction kettle. Weigh 20 grams of solid sodium hydroxide and dissolve it in 100 grams of water to form a sodium hydroxide solution, add it to the reaction kettle, and alkalize it at room temperature for 30 minutes; then add 150 g of propylene oxide dropwise, and control the dropping rate at 15-20mL / min within 10 minutes, combined with the external temperature supply, control the temperature during the dropping process at 50°C, then raise the temperature to 60°C, and react for 3 hours; then add 100 grams of 3-chloro-2-hydroxypropyl Trimethylammonium chloride, control the rate of addition within the range of 10-20mL / min, drop it within 10 minutes, continue to react at 60°C for 6 hours, and then add dropwise at 60°C with a mass concentration of 32.5 grams of 40% hypochlorous acid solution was added dropwise for 10 minutes, oxidized for 30 minutes at 60°C, and the prepared feed liquid was washed, filtered, crushed, dri...

Embodiment 2

[0066] Take by weighing 150 grams of guar film and add in the reaction kettle. Take by weighing 20 grams of solid sodium hydroxide and dissolve in 100 grams of water to form a sodium hydroxide solution, add it to the reactor, and alkalize it at normal temperature for 30 minutes, then add 80 g of propylene oxide dropwise to the reactor of the alkalization reaction, and control The dropping rate is in the range of 15-20mL / min, and the dropping is completed within 10 minutes. Combined with the external temperature supply, the temperature during the dropping process is controlled at 45°C; then the temperature is raised to 60°C, and the reaction is for 3 hours; then dropwise adding 100 gram of 3-chloro-2-hydroxypropyltrimethylammonium chloride, control the dropping rate in the range of 10-20mL / min, drop it within 10 minutes, combine the external temperature supply, control the temperature in the dropping process At 55°C, the dropping time is 10 minutes, and the reaction is continue...

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Abstract

The invention provides transparent guar gum and a preparation method thereof. The preparation method comprises steps as follows: guar gum splits are directly added to alkali liquor, the guar gum can be alkalized by the alkali liquor in the swelling process of the guar gum splits, follow-up bonding of the guar gum with hydroxyalkyl groups in a hydroxyalkyl etherifying agent is facilitated in an ether bond form, after the guar gum is mixed with a cation based etherifying agent, cations are bonded to branch chains of the guar gum in the ether bond form through a further grafting reaction, in combination with a follow-up oxidation process, a main chain of cationized guar gum is broken and the transparent guar gum is obtained. A result of the embodiment indicates that the preparation method issimple, and the transparent guar gum can be directly prepared from the guar gum splits as the raw materials.

Description

technical field [0001] The invention relates to the technical field of guar gum modification, in particular to a transparent guar gum and a preparation method thereof. Background technique [0002] Guar gum is extracted from the endosperm of guar seeds originating in India, Pakistan and other places. The main component is galactomannan, whose structure consists of D mannose through β-1,4 glycoside On some mannose, D-galactose is a multi-branched glycan composed of side chains formed by α-1,6 glycosidic bonds. From the perspective of the whole molecule, galactose is in the branched chain. Irregular distribution, mostly two or three. Guar gum is easily soluble in water and forms a high-viscosity liquid. Generally, the viscosity of a 0.6% aqueous solution can reach 4000-6000mPa.S. [0003] Natural guar gum has the disadvantages of high water-insoluble content, poor electrolyte resistance and shear resistance, inability to quickly swell and hydrate, and difficulty in controlli...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 宋纯亮朱虎刘贺朱凌霄
Owner 山东广浦生物科技有限公司
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