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Method for preparing conjugated linoleic acid by solid base catalysis

A technology of conjugated linoleic acid and solid base catalyst, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problems of complex technology, high production cost, low conversion rate, etc., and achieve catalytic High efficiency, good regeneration performance, and good stability

Inactive Publication Date: 2010-07-21
江西省粮油科学技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods are difficult to popularize and apply due to factors such as low conversion rate, complex technology, high production cost, difficulty in large-scale industrial production, and high toxicity.

Method used

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Experimental program
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Effect test

Embodiment 1

[0014] A method for preparing conjugated linoleic acid by solid base catalysis is:

[0015] 1. Preparation method of CaO / MgO supported solid base catalyst: with 22.5% Ca(AC) 2 The solution is a calcium source, with MgO as a carrier, impregnated once, dried at 90°C for 10 hours, and calcined at 700°C for 9 hours. The carrier MgO is obtained by calcining basic magnesium carbonate at 700°C for 8 hours.

[0016] 2. Isomerization: Mix 90g of 1,2-propanediol with 5g of CaO / Mg loaded solid base catalyst, pour into nitrogen, stir, turn off condensed water, heat to 160°C, add 50g of cottonseed oil, and keep the temperature at 160°C under nitrogen React under protection for 3 hours, cool the reactant to 40°C, filter out the CaO / MgO supported solid base catalyst, stir, add 4N hydrochloric acid solution until the pH value is less than 2, let it stand for 30 minutes, let go of the lower layer of waste liquid, and keep Add 100ml of 3% salt hot water to the oil phase material, wash, let sta...

Embodiment 2

[0020] A method for preparing conjugated linoleic acid by solid base catalysis is:

[0021] 1. CaO / Al 2 o 3 Supported solid base catalyst preparation method: with 30% Ca (NO3) 2 solution as calcium source, with Al 2 o 3 As a carrier, it is impregnated twice, dried at 90°C for 10 hours, and calcined at 700°C for 10 hours. Carrier Al 2 o 3 It is obtained by calcining pseudo-boehmite at 700°C for 9 hours.

[0022] 2. Isomerization: mix 80g 1,2-propanediol and 6g CaO / Al 2 o 3 Mix the supported solid base catalyst, pour in nitrogen, stir, open condensed water, heat to 170°C, add 50g safflower oil, react at a constant temperature of 160°C under nitrogen protection for 2 hours, cool the reactant to 40°C, filter out CaO / Al 2 o 3 Loaded solid alkali catalyst, stir, add 4N hydrochloric acid solution until the pH value is less than 2, let it stand for 30 minutes, let go of the lower layer of waste liquid, add 100ml of 3% salt hot water to the remaining oil phase material, was...

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Abstract

The invention relates to a method for preparing conjugated linoleic acid by utilizing vegetable oil and fat solid base catalysis, which selects one of cotton seed oil, safflower seed oil, soybean oil, sunflower oil, suaeda glauca seed oil, rice bran oil and corn germ oil as the raw material, utilizing solid base catalysis isomerization, solid base filtration, acidification, brine wash, bath, solid fatty acid subzero fractionation and liquid fatty acid urea complexation to extract conjugated linoleic acid. In the method of the invention, the percent conversion of conjugated linoleic acid is larger than 96%, the solid base catalyst has the characteristics of high catalysis efficiency, good stability, easy separation and good regeneration performance of catalyst, and is environment-friendly.

Description

technical field [0001] The invention relates to a method for preparing conjugated linoleic acid by solid base catalysis. technical background [0002] Conjugated linoleic acid (CLA) is a group of linoleic acid with conjugated double bonds at carbon 9, 11 or 10, 12 that naturally occurs in food. Isomer is a general term for several positions and geometric isomers of the essential fatty acid—Linoleic Acid (LA) molecule. In theory, there are 8 geometric isomers, namely c 9 , c 11 ; c 9 , t 11 ;t 9 , c 11 ;t 9 , t 11 ; c 10 , c 12 ; c 10 , t 12 ;t 10 , c 12 and t 10 , t 12 CLA, where c 9 , t 11 and t 10 , c 12 It is the most physiologically active ingredient. The reason why it has attracted much attention at home and abroad is mainly because it has extremely high physiological activity. (1) It can significantly reduce the levels of total cholesterol and low-density lipoprotein cholesterol in the blood, and has anti-arteriosclerosis and anti-thrombotic functi...

Claims

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Application Information

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IPC IPC(8): C07C57/12C07C51/353C07C51/42C11C3/14
CPCY02P20/584
Inventor 徐焱凌利陈安
Owner 江西省粮油科学技术研究所
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