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Technique for producing starch stearate by semidry process

A technology of stearic acid and starch ester, applied in the field of starch processing

Inactive Publication Date: 2009-04-15
诸城兴贸玉米开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is aimed at the disadvantages existing in the production of starch stearate at present, and provides a semi-dry method for producing starch stearate with low pollution in the production process, mild reaction environment, stable product quality and low cost craft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1000 kilograms of absolute dry waxy cornstarch are joined in the mixing equipment on the dry method modified starch reactor, (the water content of described waxy cornstarch≤14%, described absolute dry waxy cornstarch is will The waxy corn starch containing moisture is converted into the mass of starch without moisture, the same below). Adjust the pH value between 1.8-2.0 with hydrochloric acid with a mass concentration of 10%, acidify in the temperature range of 48-51°C for 2-2.5 hours, and neutralize with a sodium hydroxide solution with a mass concentration of 0.18% until the pH value is at 5.8 Between -6.2. Dissolve 35 kg of stearic acid in 1,000 kg of hot water at a temperature of 54-56°C to make a stearic acid aqueous solution, then spray the stearic acid aqueous solution into the neutralized material, mix well, and pass 40-mesh sieve, send the above materials into the pre-drying equipment of the dry-process modified starch reactor, start the pre-drying equipment ...

Embodiment 2

[0020] Add 1000 kg of absolute dry waxy cornstarch to the mixing equipment on the dry-process modified starch reactor, adjust the pH value between 1.8-2.0 with hydrochloric acid with a mass concentration of 10.5%, and in the temperature range of 48-51°C Acidify for 2-2.5 hours, neutralize with a sodium hydroxide solution with a mass concentration of 0.22% until the pH value is between 5.8-6.2. Dissolve 40 kg of stearic acid in 1000 kg of hot water at a temperature of 54-56°C to make a stearic acid aqueous solution, then spray the stearic acid aqueous solution into the neutralized material, mix well, pass through 40 Mesh sieve, send the above materials into the pre-drying equipment of the dry-process modified starch reactor, start the pre-drying equipment on the dry-process modified starch reactor, dry to a water content of ≤5%, and put the dried materials into dry-process denatured The temperature in the main reactor of the starch reactor was raised to 145-155° C., and the est...

Embodiment 3

[0022] Add 1000 kg of absolute dry waxy cornstarch to the mixing equipment on the dry-process modified starch reactor, adjust the pH value between 1.8-2.0 with hydrochloric acid with a mass concentration of 9.5%, and in the temperature range of 48-51°C Acidify for 2-2.5 hours, and neutralize with a sodium hydroxide solution with a mass concentration of 0.20% until the pH value is between 5.8-6.2. Dissolve 45 kg of stearic acid in 1,000 kg of hot water at a temperature of 54-56°C to make a stearic acid aqueous solution, then spray the stearic acid aqueous solution into the neutralized material, mix well, pass through 40 Mesh sieve, send the above materials into the pre-drying equipment of the dry-process modified starch reactor, start the pre-drying equipment on the dry-process modified starch reactor, dry to a water content of ≤5%, and put the dried materials into dry-process denatured The temperature in the main reactor of the starch reactor was raised to 145-155° C., and the...

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Abstract

The invention discloses a technique for producing stearic acid starch ester by a semi-dry method, which comprises steps as follows: waxy corn starch is taken as a material and added in mixing equipment of a dry denaturizing starch reactor, the waxy corn starch is acidified by adding a hydrochloric acid solution and then neutralized to neutrality by adding a sodium hydroxide solution, the neutralized material is sprayed with a stearic acid water solution evenly, and the adding amount of the stearic acid is determined according to the required degree of substitution; after being evenly mixed, the material is pre-dried in pre-dry equipment of the dry denaturizing starch reactor; the pre-dried material is put in a main reactor of the dry denaturizing starch reactor, and esterification reaction is carried out within the temperature range of 145 DEG C to 155 DEG C; and then finished products can be obtained by washing and drying the esterized material. The stearic acid starch ester produced by the technique is low in pollution and friendly in reaction environment, and the organic solvent in products is low in content, the product is high in safety, and simultaneously, the product is high in quality stability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of starch processing, in particular to a semi-dry method for producing starch stearate. Background technique [0002] Starch stearate is a long-chain fatty acid starch ester with high emulsification and good stability. It is widely used in the oil seed embedding industry, as an embedding agent for microencapsulated products, and as a fat substitute. But at present, the method of producing this product abroad is mainly the solvent method, which has caused pollution to the environment, and has the disadvantages of being unsafe, difficult to operate, not gentle in the reaction environment, and unstable in product quality. There is no industrialized production of this product in China at present, so There is an urgent need to develop this product in China, eager to seek a production process that reduces pollution and improves quality. Contents of the invention [0003] The technical problem to be solved in th...

Claims

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Application Information

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IPC IPC(8): C08B31/04
Inventor 邱立忠卞希良孙纯锐宋瑞江夏凤清
Owner 诸城兴贸玉米开发有限公司
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