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Method for ultrasonic-assisted weak base extraction of proteins in cold-pressed sesame cake meal

A technology for extracting sesame cakes and weak bases, which is applied in plant protein processing and tissue treatment, can solve the problems of reducing the quality of sesame protein, increasing investment in equipment and pollution control, and reducing the cost of equipment corrosion and pollution control. The effect of shortening production time and improving product quality

Active Publication Date: 2015-12-09
HENAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has the advantages of simple process and large production capacity, the use of strong acid and strong alkali in the production not only reduces the quality of sesame protein, but also increases the investment in equipment and pollution control.

Method used

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  • Method for ultrasonic-assisted weak base extraction of proteins in cold-pressed sesame cake meal
  • Method for ultrasonic-assisted weak base extraction of proteins in cold-pressed sesame cake meal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for ultrasonically assisted weak base extraction of protein in cold-pressed sesame cakes, comprising the steps of:

[0033] 1) Subcritical deoiling pretreatment of cold-pressed sesame cake:

[0034] Take 10kg of cold-pressed sesame cake, crush it to 40 mesh, put it into a nylon bag, put it into a subcritical extraction tank, add liquefied butane as a subcritical fluid for extraction according to the ratio of solid to liquid 1kg:4L, and extract to the cake The residual oil in the meal is less than 1% (extracted 3 times at 40°C, 30min each time). Then distill under reduced pressure at -0.10MPa and 50°C for 60 minutes to remove residual liquefied butane, and remove the sesame cake of liquefied butane for later use;

[0035] 2) Sesame protein extraction:

[0036] a: Take 1kg of the sesame cake obtained in step 1) and crush it to 80 mesh, then add 9L of 0.3mol / L sodium chloride aqueous solution, and adjust the pH to 9.5 with 1mol / L sodium hydroxide, and then trans...

Embodiment 2

[0044] A method for ultrasonically assisted weak base extraction of protein in cold-pressed sesame cakes, comprising the steps of:

[0045] 1) Subcritical deoiling pretreatment of cold-pressed sesame cake:

[0046] Take 15kg of cold-pressed sesame cake, crush it to 40 mesh, put it into a nylon bag, put it into a subcritical extraction tank, add liquefied propane as a subcritical fluid for extraction according to the ratio of solid to liquid 1kg:3L, and extract to the cake The residual oil is less than 1% (extracted 5 times at 40°C, each extraction 30min). Then distill under reduced pressure at -0.10MPa and 60°C for 80 minutes to remove residual liquefied propane, and remove the sesame cake of liquefied propane for later use;

[0047] 2) Sesame protein extraction:

[0048] a: Take 1kg of the sesame cake obtained in step 1) and crush it to 120 mesh, then add 9L of 0.6mol / L sodium chloride aqueous solution, and adjust the pH to 10.0 with 1mol / L sodium hydroxide, and then transf...

Embodiment 3

[0054] A method for ultrasonically assisted weak base extraction of protein in cold-pressed sesame cakes, comprising the steps of:

[0055] 1) Subcritical deoiling pretreatment of cold-pressed sesame cake:

[0056] Take 10kg of cold-pressed sesame cake, crush it to 20 mesh, put it into a cloth bag, put it into a subcritical extraction tank, add liquefied butane as a subcritical fluid for extraction according to the ratio of material to liquid: 1kg:4L, and extract to the cake The residual oil is less than 1% (extracted 5 times at 40°C, each extraction 30min). Then distill under reduced pressure at -0.10MPa and 65°C for 90 minutes to remove residual liquefied butane, and remove the sesame cake of liquefied butane for later use;

[0057] 2) Sesame protein extraction:

[0058] a: Take 0.5kg of the sesame cake obtained in step 1) and grind it to 160 mesh, then add 9.5L of 0.5mol / L sodium chloride aqueous solution, and adjust the pH to 9.0 with 1mol / L sodium hydroxide, and then tr...

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Abstract

The invention belongs to the technical field of deep processing of oil, and particularly relates to a method for ultrasonic-assisted weak base extraction of proteins in cold-pressed sesame cake meal. The method specifically comprises the following steps: recovering oil in sesame cake meal through subcritical extraction; then, crushing the sesame cake meal after oil extraction, and removing impurities; extracting sesame seed proteins through two times of ultrasonic-assisted base processes; centrifuging a protein extracting solution, taking supernatant, and acid-precipitating the proteins; performing centrifugation to obtain the precipitated proteins; and performing ultrafiltration and drying so as to obtain finished products of sesame seed proteins. Compared with a conventional alkali-solution and acid-isolation method, the method disclosed by the invention has the advantages of high quality of products, little pollution, high efficiency, and the like. Through the adoption of the method disclosed by the invention, an oil production byproduct, namely the low-temperature sesame cake meal, is produced into sesame seed proteins with a high added value, so that the comprehensive utilization of resources is realized, the economic benefits are improved, and the method disclosed by the invention is of positive socioeconomic significance.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of oil processing by-products and plant protein extraction, and specifically relates to a method for processing cold-pressed sesame cakes with ultrasonic-assisted weak alkali, and obtaining protein in sesame cakes through acid precipitation, alcohol washing and membrane separation . Background technique [0002] my country is a big producer and consumer of sesame. In 2013, the output of sesame in my country was 590,000 tons. Due to the shortage of supply, about 400,000 tons of sesame should be imported from abroad every year. At present, 80% of sesame seeds in my country are used for oil extraction, and more than 500,000 tons of sesame cakes are produced every year. Sesame protein is one of the main ingredients in sesame cake, accounting for about 50%. Sesame protein has a high nutritional value, and its essential amino acid content accounts for 30% of the total amino acid cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23J3/14A23J3/22
Inventor 芦鑫张丽霞宋国辉孙强黄纪念
Owner HENAN ACAD OF AGRI SCI
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