A kind of preparation method of stearic acid waxy cornstarch ester
A technology of waxy cornstarch and cornstarch, which is applied in the field of preparation of stearic acid waxy cornstarch ester, can solve problems such as reduction of starch retrogradation stability, influence on product promotion and application, and precipitation of oily substances, so as to achieve good product quality, Conducive to the effect of saving water resources and stabilizing performance
Active Publication Date: 2016-08-10
诸城兴贸玉米开发有限公司
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[0003] However, the currently disclosed method is only a simple esterification modification of starch. The hydroxyl groups on the starch molecules are partially replaced by stearic acid groups. While the hydrophobicity of the starch is improved, the hydrophilicity of the starch is reduced. Because the starch is easy to age , leading to the reduction of retrogradation stability of starch, easy precipitation during use, and precipitation of embedded oily substances with the prolongation of storage time, which seriously affects the popularization and application of the product
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[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific implementation methods are now described in detail.
[0031] A kind of preparation method of stearic acid waxy maize starch ester, as preferred embodiment, comprises the following steps:
[0032] Step 1. Take 1 kg of waxy cornstarch, adjust the pH value of the waxy cornstarch to 2.0 with 10wt% hydrochloric acid, and place the mixture of waxy cornstarch and hydrochloric acid at a temperature of 50°C for acidification ;
[0033] Step 2, heating stearic acid with 4% dry weight of starch to 68°C, then gradually adding the heated stearic acid at a rate of 10000r / min to high-speed shearing hot water for 20 minutes to obtain For stearic acid dispersion, the temperature of hot water is 60°C;
[0034] Step 3, the stearic acid dispersion is sprayed into the mixture of waxy cornstarch and hydrochloric acid obtained in step 1 using a high-pressure injection ...
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The invention discloses a method for preparing stearic acid waxy corn starch ester. The method comprises the following steps of: adjusting the pH value of waxy corn starch to 1.8-2.0 by 10wt% hydrochloric acid; acidizing under the condition of 45-65 DEG C, then mixing the stearic acid with hot water to form stearic acid dispersion liquid; jetting the stearic acid dispersion liquid into mixture of the waxy corn starch and the hydrochloric acid in in a mist form; then screening through 35-45 meshes screen, and finally preparing a stearic acid waxy corn starch ester product by esterification reaction, washing and spray drying. According to the method, the waxy corn starch is taken as a raw material; the stearic acid is taken as an esterifying agent; the prepared stearic acid waxy corn starch ester product is good in quality and stable in performance; environmental pollution is hardly caused in the preparation process, which is favorable for conservation of water resource and development of environmental enterprises; and the method has obvious economic benefit, social benefit and ecological benefit and has wide development prospect.
Description
technical field [0001] The invention relates to a preparation method of stearic acid waxy cornstarch ester. Background technique [0002] Starch is a polyglucose containing multiple hydroxyl groups. Because it contains a large number of hydroxyl groups, it behaves as a hydrophilic colloid after gelatinization. When the hydroxyl groups on its molecules are hydrophobically modified, it shows strong hydrophobicity and can treat oily The material plays the role of embedding and emulsification, and can replace natural plant gums such as gum arabic. Compared with synthetic glycerides, it has the advantages of lower price, better embedding effect, and good shear resistance, and has broad application prospects. At present, the methods for hydrophobic modification mainly include hydrophobic alkyl modification and hydrophobic fatty acid modification. Stearic acid modification belongs to hydrophobic fatty acid modification. Starch stearate is a long-chain fatty acid starch ester, which...
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IPC IPC(8): C08B31/16C08B31/12
Inventor 邱立忠卞希良黄亮亮孙纯锐
Owner 诸城兴贸玉米开发有限公司