Method for preparing water soluble mixed ether by using corn bran and wheat bran

A corn bran and wheat bran technology, applied in the field of water-soluble mixed ethers, can solve the problems of excess corn bran, limitation, low nutritional value and the like

Inactive Publication Date: 2010-08-04
SHENZHEN PROFESSIONAL ADVANCED BIOCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, corn bran and wheat bran are mainly used for feed. Because the protein content of wheat bran is higher than that of corn bran, it is widely used in feed; because corn bran has low nutri...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Add 2.5L of 91% ethanol to a 5L autoclave, add 285g of sodium hydroxide under stirring, heat to 50-70°C to dissolve it completely, then cool to 25°C, add 500g of 80 mesh corn bran (or wheat bran ), alkalized at 10-40°C for 40 minutes under stirring. Under the condition of flowing cooling water, 670 g of 50% ethanol solution of chloroacetic acid was added dropwise, the temperature was controlled between 25-45° C. during the dropwise addition, and the dropwise addition time was 20-30 minutes.

[0025] After the chloroacetic acid alcohol solution was added dropwise, the temperature was raised to 55°C in 20 minutes, etherification was carried out at a constant temperature for 30 minutes, the temperature was directly raised to 82°C, and the reaction was carried out at a constant temperature for 60 minutes.

[0026] When cooled to 30-35°C, use glacial acetic acid to neutralize the pH value to 6.5-8.5, filter, and dry the filter cake at 80°C. Obtain about 75% degree of substi...

example 2

[0029] Add 145g of sodium hydroxide in example 1, after alkalization finishes, directly add 413g sodium chloroacetate powder, other is the same as example 1, obtains CMGCHS ether product DS=0.75, with NDJ-1 viscometer, 20 ℃, 2% aqueous solution The viscosity is 250cps.

example 3

[0031]Add 3.2L of 92% isopropanol to a 5L autoclave, add 200g of sodium hydroxide under stirring, heat to 50-70°C to dissolve it completely, then cool to 25°C, add 400g of corn bran of 100-120 mesh, Basify at 10-40°C for 60 minutes with stirring. Under the condition of cooling water, cool down to 20°C, evacuate to -0.06Mpa, and evacuate for 10 minutes. Under the condition of sealing the autoclave, connect the ethylene oxide tank, and add 350g of ethylene oxide in 30-50 minutes. 25-30°C reaction for 40 minutes,

[0032] Gradually raise the temperature, the pressure in the kettle must not exceed 0.40Mpa, and react at 45-65°C for 4-8 hours. Cool down to 25°C, add 310g of 95% acetic acid, neutralize to PH=6.5-8.5, filter, and dry the filter cake at 80°C for 4 hours to obtain 600g of 75-80% crude hydroxyethyl mixed ether (HEGCHS).

[0033] Wash the crude HEGCHS three times with 2.5L of 75% isopropanol at room temperature to obtain 95% light yellow HEGCHS mixed ether product. Usi...

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Abstract

The invention relates to a method for preparing water soluble mixed ether by using corn bran and wheat bran, wherein the corn bran is the by-product obtained during the preparation of corn starch and the wheat bran is the by-product obtained during the preparation of wheat starch. The invention provides a method for directly synthesizing water soluble mixed ether formed by Arabic xylan ether, cellulose ether, hemicellulose-lignin ether, starch ether and the like by taking the corn bran and the wheat bran as raw materials, solves the problem that the by-products of the corn and wheat processing industry cannot be processed into products with high added values, and widens the application scope of the corn bran and the wheat bran. The preparation of water soluble mixed ether by using the corn bran and the wheat bran is conducted according to the following technological processes that: the corn bran and the wheat bran are crushed into 40-200 mesh powder and water soluble mixed ether is prepared through alkalization or alkaline catalyst activation and etherification in inert organic solvent. The invention has the advantages that protein and fat in the bran can be directly hydrolyzed in the process of alkalization or alkaline catalyst activation and hydrolysate and color are removed in the process of times of mixed ether washing and purification.

Description

technical field [0001] The invention relates to a water-soluble mixed ether prepared from corn bran and wheat bran Background technique [0002] At present, corn bran and wheat bran are mainly used for feed. Because the protein content of wheat bran is higher than that of corn bran, it is widely used in feed; because corn bran has low nutritional value and contains a certain amount of lignin, it is used for Feed is limited, wheat bran is mainly used to extract arabinoxylan, and corn bran is rarely used, resulting in a severe surplus of corn bran. In the invention, corn bran (or wheat bran) is used as raw material, organic solvent is used as solvent, and etherifying agent is etherified to generate water-soluble mixed etherified substance through alkalization (or alkali catalytic activation). The etherified product is completely soluble in water to form a colloidal solution with a certain viscosity. Different water-soluble mixed ethers prepared with different etherification ...

Claims

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Application Information

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IPC IPC(8): C08L5/14C08L1/26C08L3/08C08L89/00
Inventor 冯有愉冯婷赵德彬
Owner SHENZHEN PROFESSIONAL ADVANCED BIOCHEM TECH
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