Preparation method of phytosterin ester rich in oleic acid

A technology of phytosterol esters and phytosterols, which is applied in the field of food additive preparation, can solve problems such as long reaction time, complex reaction, and harsh operating conditions, and achieve the effects of low reaction condition requirements, high detection accuracy, and reduced side reactions

Inactive Publication Date: 2009-09-23
中粮工科(西安)国际工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] US0015374 discloses a method for preparing phytosterol esters using rapeseed oil methyl esters and phytosterols. The reaction process uses sodium methoxide as a catalyst. The strong corrosion of sodium methoxide and the by-product methanol produced during the preparation process make it unusable as a food product. additive
[0008] US0068425 discloses a method for the manufacture of phytosterol esters rich in oleic acid, but it uses thionyl chloride which is more polluting as a catalyst in the manufacturing process, and its operating conditions are harsh, making it difficult for industrial production
[0009] In short, most of the existing processes use toxic and harmful organic solvents, or the by-products are toxic and harmful substances, which cannot be applied to food; or the operating conditions are harsh, the reaction is complicated, the reaction time is long, the product yield is low, and it is not easy for industrial production.

Method used

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  • Preparation method of phytosterin ester rich in oleic acid

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Comparison scheme
Effect test

Embodiment 1

[0023] Take 10kg of tea seed oil and mix with 20kg of ethanol, heat up to reflux at 80°C, add 1.5kg of sodium ethoxide, and keep this temperature for 2.5h. Then add 30kg of deionized water, leave to stand for stratification after slight stirring, remove the lower hydration layer, then wash with 30kg of deionized water to neutrality, dry the oil layer after washing under vacuum to obtain 8.6kg of fatty acid ethyl ester, The conversion was 98% and the yield was 95%.

[0024] Mix 1 kg of phytosterol with 4 kg of fatty acid ethyl ester prepared above and heat up to 120° C. to dissolve the phytosterol. After heating up, vacuum-dry the reactant at a vacuum degree of -0.08 MPa and keep for 2 hours. After the dehydration was completed, 1.5 kg of 35% sodium ethylate solution was added. The mixture was kept at 140°C for 4 hours under a vacuum of 50 Pa until the reaction was complete. After the reaction was completed, the temperature of the reaction solution was lowered to 70°C, the vac...

Embodiment 2

[0026] Take 1kg of tea seed oil and mix it with 1.5kg of ethanol, heat it up to reflux at 80°C, add 100g of sodium ethoxide, and keep it at this temperature for 2 hours. Then add 1 kg of deionized water, stir slightly and leave to stand for stratification, remove the lower hydration layer, then wash with 1 kg of deionized water until neutral, and degas and dry the oil layer after washing to obtain 830 g of fatty acid ethyl ester , the conversion rate is 97%, and the yield is 96%.

[0027] Mix 100g of phytosterol with 500g of the fatty acid ethyl ester prepared above and heat up to 120°C to dissolve the phytosterol. After heating up, vacuum-dry the reactant at a vacuum degree of -0.09MPa and keep for 1h. After the dehydration was completed, 150 g of 35% sodium ethoxide solution was added. The mixture was kept at 140°C for 4 hours under a vacuum of 50 Pa until the reaction was complete. After the reaction was completed, the temperature of the reaction solution was lowered to 70...

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Abstract

The invention provides a preparation method of phytosterin ester rich in oleic acid, which comprises the following steps: firstly, leading seed fat rich in oletic acid and ethanol to perform alcoholysis reaction under the action of catalyst to obtain fatty acid ethyl ester rich in oleic acid; secondly, leading the fatty acid ethyl ester rich in oleic acid and phytosterin to perform the ester exchange reaction under the action of the catalyst, and removing unreacted ethanol and redundant fatty acid ethyl ester so as to obtain crude phytosterin ester rich in oleic acid; thirdly, obtaining primrose yellow to white thick fluid by decoloring the phytosterin ester, i.e. refined phytosterin ester. The oleic acid content of the seed oil is more than 60 percent; and high-content oleic acid reduces the side reaction and improves the yield of the phytosterin ester. The preparation method does not use deleterious organic solvent and produce deleterious materials during the whole preparation, has lower requirement on reaction condition, and is suitable for industrial mass production of food.

Description

technical field [0001] The invention relates to a preparation method of a food additive, in particular to a preparation method of a phytosterol ester rich in oleic acid. Background technique [0002] Phytosterols are the basic chemical components of plants, including β-sitosterol, brassicasterol, stigmasterol, campesterol, etc. Their structures are very similar, and they all contain a steroid nucleus, and there is a hydroxyl group at the 3-position of the steroid nucleus. Under certain conditions, sterols can react with fatty acids and their esters to form phytosterol esters. [0003] At present, phytosterols have a good cholesterol-lowering effect and have increasingly attracted people's attention. Since the structure of phytosterols is similar to that of cholesterol, they can form a competitive absorption relationship with cholesterol in the small intestine, and can replace part of cholesterol to be absorbed, while phytosterols themselves cannot be used in the human body,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J9/00A23L1/30A61P9/00B01J31/02A23L33/11
Inventor 史宣明张骊陈燕夏辉孟佳梁宇柱刘恩礼刘建冯贞陈利涛鲁海龙王宁赵凤鸣马雅斌
Owner 中粮工科(西安)国际工程有限公司
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