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

A technology for separating protein and cottonseed germ flakes, which is applied in the direction of fat oil/fat production, protein composition of vegetable seeds, protein food ingredients, etc. It can solve the problems of complex filtering equipment, large filtering equipment, high desolvation temperature, etc., and achieve equipment layout Reasonable, simple and mature process, high protein quality effect

Inactive Publication Date: 2006-01-18
XINJIANG WESTERN ANIMAL HUSBANDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Cottonseed germ slices were immersed in No. 4 solvent to obtain mixed oil and wet meal. The temperature during oil immersion was 20°C. The mixed oil was evaporated to obtain cottonseed crude oil, and the solvent was recovered, and the wet meal was desolvated to obtain dry meal. The desolvation temperature is 40°C, the pressure is -0.085MPa, and the solvent is recovered. The dry meal is subjected to alkali dissolution and a centrifugation to obtain a high solid phase and supernatant (I). The temperature during alkali dissolution is 50°C, and the pH value is 9. The solid phase is dried to obtain feed protein, and the supernatant (I) is subjected to acid precipitation, secondary separation, neutralization, homogeneous sterilization, and spray drying to obtain isolated protein. The pH is 4.5 during acid precipitation, and the pH is 4.5 during neutralization. 7. Homogenization sterilization is instant sterilization, and the temperature is 125°C.

Embodiment 2

[0016] Example 2, the difference between Example 2 and Example 1 is that the temperature during oil immersion is 60°C, the desolvation temperature is -5°C, the pressure is -0.095MPa, the temperature during alkali dissolution is 35°C, and the pH value is 12. The pH value is 3.5 during acid precipitation and 6.5 during neutralization, and the homogenization sterilization is instant sterilization at a temperature of 120°C.

Embodiment 3

[0017] Example 3, the difference between Example 3 and Example 1 is that the temperature during oil immersion is 0°C, the desolvation temperature is 60°C, the pressure is -0.01MPa, the temperature during alkali dissolution is 65°C, the pH value is 8, and the acid The PH value is 5.5 when sinking, and 7.5 when neutralizing. The homogenization sterilization is instantaneous sterilization, and the temperature is 140°C.

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PUM

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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 extracted to 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 a method for soaking oil and producing protein isolate from cottonseed germ flakes. Background technique [0002] Chinese patent CN1288676A discloses a "method for extracting protein from degreased cotton dregs", which includes the steps in the following order, first degreasing cotton dregs is pulverized and ground, water is added during grinding, and then filtrate and filter residue are obtained through leaching and separation. Collect the filtrate, keep the filtrate at a certain temperature, adjust the pH value to the isoelectric point to precipitate the protein, separate to obtain the supernatant and protein slurry (I), and wash and dry the protein slurry (I) to obtain the finished protein. The disadvantage is that the crushing and grinding process makes the equipment of the production line huge and the cost increases; secondly, the crushing and grinding can easily cause the pigment of the cotton husk in the cotton m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23J1/14C11B1/10
Inventor 李树贤惠向斗孙雪玲
Owner XINJIANG WESTERN ANIMAL HUSBANDRY