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Lipin deacidifying method

A deacidification method and oil technology, applied in the direction of fat oil/fat refining, fat production, etc., can solve the problems of high crude oil pretreatment requirements, large loss of neutral oil, long reaction time, etc., and achieve good deacidification quality, medium Low oil loss and low production cost

Inactive Publication Date: 2010-05-12
INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acid value of the oil can be reduced from 8.3mgKOH / g to 0.9mgKOH / g, and the deacidification effect is good, but there are problems such as high enzyme cost and long reaction time that limit the development of industrialization
[0007] WO2008002154 discloses a method for deacidification of oil by combining solvent extraction and membrane separation. This method has high deacidification efficiency, high oil refining rate, and easy operation, but there are problems such as large reagent consumption, low oil flux, and difficult membrane cleaning.
[0008] Judging from the above deacidification methods, these processes either have a large loss of neutral oil, or have high requirements for crude oil pretreatment, or have problems such as high energy consumption and large equipment investment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Take 500g of degummed rapeseed oil with an acid value of 1.95mgKOH / g in a specific container, add grease deacidification adsorbent I with 2% by weight of the grease, heat up to 60°C, and stir for 50min at 500 rpm , deacidified rapeseed oil was obtained after centrifugation, and its acid value was determined to be 0.20 mgKOH / g, and the yield of neutral oil was 97.7%. Wherein the preparation method of oil deacidification adsorbent product I is: take 2000g peanut shells, activate after cleaning and removing impurities. Weigh 100g of the activated substance in a specific container, add a potassium hydroxide solution with a weight concentration of 15%, the amount added is 12 times the volume of the activated substance, fully stir, then filter and separate, and dry to obtain the oil deacidification adsorbent product I.

Embodiment 2

[0028] Embodiment 2: Take 500g of degummed tea seed oil with an acid value of 2.33mgKOH / g in a specific container, add deacidification adsorbent II with 2.0% of the oil weight, heat up to 50°C, and stir for 60min at 500 rpm, The tea seed oil was separated by centrifugation, the acid value of the tea seed oil was determined to be 0.18 mgKOH / g, and the yield of neutral oil was 97.3%. Among them, the preparation method of the oil deacidification adsorbent product II is as follows: take 1000g of camellia oleifera shell, and activate it after cleaning and removing impurities. Weigh 100g of activated substance in a specific container, add 20% sodium hydroxide solution in an amount of 8 times the volume of activated substance, stir thoroughly, then filter and separate, dry to obtain oil deacidification adsorbent product II.

Embodiment 3

[0029]Example 3: Take 500g of degummed linseed oil with an acid value of 2.86mgKOH / g in a specific container, add deacidification adsorbent III with 1% of the oil weight, heat up to 70°C, stir at 500rpm / min for 30min, and centrifuge The linseed oil is separated, the acid value of the linseed oil is determined to be 0.29 mgKOH / g, and the neutral oil yield is 96.3%. Among them, the preparation method of the oil deacidification adsorbent product III is as follows: 2000g of sunflower seed shells are weighed and activated after cleaning and removing impurities. Weigh 100g of the activated substance in a specific container, add potassium carbonate solution with a weight concentration of 25%, the amount added is 15 times the volume of the activated substance, fully stir, then filter and separate, and dry to obtain the oil deacidification adsorbent product III.

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Abstract

The invention relates to a lipin deacidifying method, which comprises the following steps of: putting lipin in a container, adding a deacidifying adsorbent, wherein the adding amount of the deacidifying adsorbent is 0.05 to 6 percent of the weight of the lipin, fully stirring at the temperature of between 15 and 110 DEG C for 5 to 150min, and performing centrifugal separation. The deacidifying adsorbent consists of oil plant seed hulls containing 2 to 35 weight percent of alkaline compound. The oil plant seed hull is one or more of oil tea hull, peanut hull, sunflower seed hull, castor-oil plant seed hull and walnut hull. The lipin deacidifying method is simple in technological operation and equipment, short in period, low in energy consumption, good in deacidifying quality, low in neutral oil loss and low in production cost, has no solvent loss, can substitute the conventional alkali refining method without any equipment, is strong in applicability, and can be widely suitable for different kinds of plant oils, animal fats and microbial oils and also for oils with low acid number and high acid number.

Description

technical field [0001] The invention relates to an oil deacidification method, in particular to a method for reducing the acid value of the oil by using an adsorbent capable of removing fatty acids in the oil, and belongs to the technical field of oil processing. Background technique [0002] Grease deacidification refers to the removal of free fatty acids contained in crude oil, and at the same time removes some oil accompanying substances such as pigments and phospholipids. As an important process in the oil refining process, deacidification is also a key process that affects oil refining consumption and product quality. At present, traditional methods are mainly used in industrial production, including chemical deacidification, physical deacidification and mixed oil deacidification. Chemical deacidification, also known as alkali refining, is to add lye to the degummed oil, and the lye and free fatty acids undergo a neutralization reaction to form soapstock, which is then...

Claims

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Application Information

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IPC IPC(8): C11B3/10
Inventor 黄凤洪刘昌盛杨湄黄庆德李文林邓乾春钮琰星郭萍梅杨金娥程晓英
Owner INST OF OIL CROPS RES CHINESE ACAD OF AGRI SCI
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