Method for soaking oil from cotton seed embryo piece and producing separation protein

Abstract

The present invention is the process of producing oil and protein with cotton seed cake. Cotton seed cake is soaked with low-carbon alkane at low temperature to obtain mixed oil and wet residuum, the mixed oil is evaporated to obtain coarse cotton seed oil and separated solvent, the wet residuum is exsolution treated to obtain dry residuum and separated solvent, and the dry residuum is extractedto obtain protein. Without dephenolizing step and grinding step, the present invention has simple technological process, high protein extracting rate, high coarse oil quality and other advantages and is suitable for industrial production.

Description

technical field [0001] The present invention relates to methods for oil immersion and production of protein isolates from cottonseed embryo sheets. Background technique [0002] Chinese patent CN1288676A discloses a "method for extracting protein from degreased cottonseed meal", which includes the following steps: firstly, the degreased cottonseed meal is pulverized and ground, water is added during grinding, and then filtrate and filter residue are obtained by immersion and separation, The filtrate is collected, and the filtrate is kept at a certain temperature, and the pH value is adjusted to the isoelectric point to precipitate the protein. After separation, the supernatant and the protein slurry (I) are obtained, and the protein slurry (I) is washed and dried to obtain the finished protein. The disadvantage is that the pulverization and grinding process makes the equipment of the production line huge and the cost increases; secondly, pulverization and grinding can easily...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. Cottonseed kernels are mixed with solvents for wet grinding. The solvents are all flammable and explosive products. The grinding equipment is prone to generate static electricity, heat, sparks, etc. during the friction process, which endangers production safety. If dry grinding is performed, protein 1. Gossypol is volatile, and the cotton kernels contain oil, and they are easy to agglomerate during grinding, so it is difficult to guarantee the equipment; 2. The cotton kernels are broken due to grinding, and it is difficult to separate the cotton kernels from the solvent. The filtration equipment is huge, and considering The solvent is volatile and the filtering equipment is complicated; 3. Due to the grinding effect, the mixed solvent oil discharged contains a large amount of dregs, which increases the impurities in the crude oil and affects the quality of the crude oil; 4. Use low-carbon alcohol to remove phenols, Increased cost; 5. This technology can only be used as feed protein, not protein isolate

Its shortcoming is: 1, this technology first soaks oil with No. 6 solvent, then soaks gossypol with methanol, and the wet meal is desolvated, the desolventization temperature is high, and the protein in the meal is volatile; 2, remove gossypol with methanol, increase 3. This technology can only produce dephenolized cottonseed meal for feed, but cannot produce protein isolate, which is low-value utilization