Method for producing high water absorption graft starch by sweet potato

Abstract

The invention provides a method for producing high water absorption graft starch by sweet potato. The method uses the sweet potato as a raw material, deionized water as a dispersing agent, acrylic acid as a graft monomer and NSN novel initiating agent as an initiating agent, and comprises the following steps: heating and stirring the sweet potato pure white starch and the deionized water in a reaction kettle for gelatinizing in production; adding the acrylic acid solution into the mixture and mixing evenly; adding the NSN novel initiating agent after standing to lead graft copolymerization of the starch; placing the copolymerized material into a drier for drying and crushing the dried material into fine powder; and screening the fine powder into products in six grades, packing and warehousing the products. The raw material is the sweet potato, and the dispersing agent is the deionized water instead of alcohol, so that the method can reduce probability of fire disaster occurrence in production, improve safety, and reduce production cost; and the novel initiating agent is adopted, so the method can shorten the time of the graft copolymerization, makes the copolymerization reaction more mild, and is convenient to regulate temperature and water absorption multiplying power of the graft starch.

Description

【Technical field】 [0001] The invention relates to a method for producing grafted starch, in particular to a method for producing grafted starch from sweet potatoes. 【Background technique】 [0002] Starch super absorbent is a starch fine chemical product with strong water absorption capacity. This product has a wide range of applications and can be used as a water absorbent, water retaining agent, dehydrating agent, water blocking agent etc. At present, the method of producing this kind of super absorbent grafted starch in my country generally uses corn, potato or rice as raw materials, suspends starch in water by hydrolysis, and uses emulsion graft polymerization. The yield of grafted starch in this method is low. , waste of water, high energy consumption, complicated process, and the output of corn and potatoes in southern my country is low, the quantity is small, and the price of rice is high. Therefore, the high water-absorbing grafted starch produced is expensive and dif...

AI Technical Summary

Problems solved by technology

At present, the method of producing this kind of super absorbent grafted starch in my country generally uses corn, potato or rice as raw materials, suspends starch in water by hydrolysis, and uses emulsion graft polymerization. The yield of grafted starch in this method is low. , waste of water, high energy consumption, complicated process, and the output of corn and potatoes in southern my country is low, the quantity is small, and the price of rice is high. Therefore, the high water absorption grafted starch produced is expensive and difficult to industrialize.

In the technical scheme of CN1317494A disclosed by the applicant on October 17, 2001, in the practice of industrial production, it was found that the use of alcohol as a dispersant was too large, which increased the probability of fire, had unsafe factors, and increased the risk of fire. The production cost and other formulas are unreasonable, resulting in a long graft copolymerization time, which makes the copolymerization reaction less mild and affects the strength and water absorption of grafted starch