New technique for separating and extracting fatty acid in nigre of vegetable oil

A fatty acid and vegetable oil technology, which is used in the recovery of fatty oils/fatty acids from waste, production of fat, and recovery of fatty substances, can solve the problems affecting the market competitiveness of fatty acids and production costs, low product quality, and many hydrolysis times. The effect of fast and efficient hydrolysis, product quality improvement and purity improvement

Inactive Publication Date: 2007-02-21
HEFEI UNIV OF TECH
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Problems solved by technology

However, there are problems such as complex process (more hydrolysis times) and low product quality in

Method used

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Experimental program
Comparison scheme
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Embodiment

[0022] The new process for the separation and extraction of fatty acids in vegetable oil soapstock comprises the following steps:

[0023] 1) Acidified soapstock

[0024] Weigh 100g of rapeseed oil soapstock, add 50% water according to the mass ratio, stir evenly, place in a 500ml three-neck flask, preheat at 85°C, add 10ml of sulfuric acid solution with a concentration of 50% to separate the liquid The funnel was added dropwise into the reaction vessel, and timed for 1.5 hours. After the reaction was completed, the mixture was allowed to stand for stratification, and the acidified water in the lower layer was removed, and the upper layer was washed and dried to obtain acidified oil.

[0025] 2) short path distillation

[0026] 200g of the obtained acidified oil was subjected to short-path distillation, the distillation temperature was 180°C, the operating pressure was 0.03torr, the feed temperature was 80°C, and the rotation speed was 150r / min to obtain light and heavy fract...

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Abstract

This invention relates to a new technique for separating and purifying fatty acids from soap stock of plant oil. The new technique is aimed to achieving a hydrolysis rate of 98% with mild reaction conditions. The technique comprises: (1) performing short-path distillation on acidified plant oil to separate heavy and light components; (2) performing acid-catalyzed hydrolysis on the heavy components under normal pressure to obtain crude fatty acids; (3) performing short-path distillation to obtain purified fatty acids. The light components are mainly fatty acids, thus can reduce the contents of fatty acids in the acidified plant oil and realize rapid and high-efficiency hydrolysis of grease. The reactions are performed at 120 deg.C under normal pressure, thus can reduce the requirements on the equipment.

Description

technical field [0001] The invention relates to the field of biochemical technology, in particular to a process for separating and extracting fatty acids in vegetable oil soapstock. Background technique [0002] Rapeseed is the most important oil crop in my country, with an average annual planting area of ​​110-120 million mu and a total output of about 11 million tons, ranking first in the world. Soapstock is a by-product of rapeseed oil alkali refining and deacidification process, which accounts for about 5% of rapeseed oil production, and the main components in soapstock are: neutral oil, phospholipid, sodium soap and water, in addition Some substances such as protein, carbohydrates and pigments have a total fatty acid content of 40%-60%. [0003] Fatty acid is an important industrial raw material and the basic raw material of oleochemical industry. It is mainly used in emulsion polymerization and as a rubber additive. It is used to prepare ore flotation agents and oil f...

Claims

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Application Information

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IPC IPC(8): C11B13/02
CPCY02W30/74
Inventor 姜绍通邵平潘丽军李岩
Owner HEFEI UNIV OF TECH
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