Modified starch prepared by substituting tapioca starch for potato starch and its production process

Abstract

The invention relates to the technical field of fine chemical engineering, in particular to modified starch prepared through cassava starch instead of potato starch and a production technology thereof. The production technology comprises the following steps that cassava starch and water are mixed and stirred to be uniform, the mass ratio of the cassava starch to the water is 1:1-1.2, diluted caustic soda is added to adjust the pH to be 10.8-11.0, and the temperature of 35-45 DEG C is kept constant; N-phosphoryl-N-methylimidazole, salicylo-phosphate and N-benzoyl ammonium phosphate are added to be subjected to a reaction for 4-6 h; the temperature is decreased to 35-36 DEG C, diluted acid is added to adjust the pH to be 10.2-10.5, and then a vinyl acetate monomer mixed solution is added to be subjected to a reaction for 1-3 h; sodium hydrogen sulfate and diluted acid are added to adjust the pH to be 5.6-5.8, rotational flow washing is performed, and dewatering and drying are performed to obtain the cassava modified starch. The production technology of the modified starch is simple and mature, the production cost is low, and the obtained cassava modified starch has the good water-retaining property, viscosity and ageing resistance.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to modified starch prepared by substituting tapioca starch for potato starch and a production process thereof. Background technique [0002] Potatoes are rich in nutrients. Fresh potato tubers contain about 20% carbohydrates, about 2% protein, about 1% inorganic salts and rich vitamin C (40mg / 100g), which is a food resource with more comprehensive nutrients. Potato starch has good quality and is widely used in food industry, pharmaceutical industry and chemical industry. However, the raw material price of potato starch is relatively high. The current unit price of potato starch in the market is 7000-9000 yuan / ton, which is relatively high. In the paper industry, it is usually necessary to add starch to the pulp for paper making, which increases the processing of the paper industry. Cost, the use of potato starch has high limitations. [0003] The unit price of cassava starc...

AI Technical Summary

Problems solved by technology

However, the raw material price of potato starch is relatively high. The current unit price of potato starch in the market is 7000-9000 yuan / ton, which is relatively high. In the paper industry, it is usually necessary to add starch to the pulp for paper making, which increases the processing of the paper industry. cost, the use of potato starch has high limitations

[0003] The unit price of cassava starch on the market is 2000-4000 yuan / ton, and the price of starch is relatively low. However, the quality of existing cassava starch is poor, and it cannot achieve the water retention, viscosity and anti-aging performance of potato starch, and its application is also limited.

Images