Process for preparing peanut oil and peanut protein powder synchronously

Abstract

The invention relates to a method for preparing peanut oil and peanut protein powder simultaneously, which comprises following steps: treating peanut at low temperature, pressing with oil expeller atlow temperature and getting crude oil and cake; fine filtering the crude oil and getting peanut oil; extracting said cake at low temperature, ultra-micro disintegrating, disinfecting and getting peanut protein powder. The invention is characterized in that the process is carried out at low temperature, so the nutrition can be maximum retained, and the peanut oil is rich in unsaturated fatty acid,contains no cholesterol, color is light, the phosphatide content is low, and there is no toxic chemical component and residual. The protein is not degenerated, the residual oil content is lower than 1.5%, protein content is more than 55%, and the water and oil retaining property, emulsifying and gel performance are better. The application is wider.

Description

technical field [0001] The invention relates to a method for synchronously preparing peanut oil and peanut protein powder. Background technique [0002] Obtaining low-denatured high-quality protein while extracting oil has always been a research topic in my country's food processing industry. At present, there are two most advanced technologies for both oil production and protein extraction in the world, namely low temperature pre-pressing extraction method and water preparation method. Since the 1970s, my country has introduced and developed nearly 30 such production lines from abroad, but they are mainly used for soybean oil production and have not yet been applied in the peanut field. Although these production techniques can increase oil yield and reduce protein thermal denaturation, they all have problems such as serious environmental pollution and high residual organic solvents in food to varying degrees. [0003] In recent years, many domestic scientific research ins...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the amount of residual oil in peanut protein powder is relatively high, and the yield of peanut oil is low

Twice cold pressing is the commonly used oil extraction technology at present, but it has a long process cycle (more than 8 hours), a relatively low yield of peanut oil (41.5%), and the obtained peanut protein powder has the problem of partial denaturation, and the peanut oil The production of protein and protein powder cannot be completed in a set of process routes

Although the above two production processes have solved the problems of protein thermal denaturation, solvent residue, three waste discharge pollution and aflatoxin substandard in the traditional process to varying degrees, there are still many problems that have not been resolved, such as limited production scale, production cost, etc. High, high residual oil content of finished protein (generally above 6%), poor protein functionality, etc.

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