Method for reducing oilseed acid value

A technology of oil acid value and oil, which is applied in the direction of fatty acid esterification, etc., can solve the problems of difficult recovery of glycerin, cumbersome process operation, and large material loss, so as to be beneficial to environmental protection and subsequent processing, simplify operation steps, and reduce oil acid value effect

Active Publication Date: 2009-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It can be seen from the prior art that the oil with higher acid value generally needs to be esterified in advance to change the free fatty acid into fatty acid ester. If sulfuric acid and hydrochloric acid are used as catalysts in this process, the corrosion will be serious and a large amount of oil will be produced. Waste acid, waste water; after pre-esterification, the liquid acid catalyst left in the material should be neutralized with alkali, the amount of alkali catalyst will increase, the whole process will be longer, the process operation will be cumbersome, equipment investment and energy consumption will increase, and the loss of materials will be large. Difficulty recovering glycerin
The same problem exists in neutralizing free fatty acids with alkali

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Provide acidified oil with an acid value of 140mgKOH / g and methanol into the tubular reactor, and the liquid hourly space velocity of the acidified oil is 0.6h -1 , the molar ratio of alcohol to oil is 5.8, the temperature in the reactor is 246°C, the pressure is 0.7MPa, and the acid value of the oil after reaction is 17.6mgKOH / g.

Embodiment 2

[0026] Provide acidified oil with an acid value of 152mgKOH / g and methanol into the tubular reactor, and the hourly space velocity of the acidified oil is 0.6h -1 , the molar ratio of alcohol to oil is 5.8, the temperature in the reactor is 213° C., the pressure is 2.5 MPa, and the acid value of the oil after reaction is 16.9 mgKOH / g.

Embodiment 3

[0028] Food waste oil and methanol with an acid value of 87mgKOH / g are used as raw materials and supplied to the tubular reactor, and the hourly space velocity of the waste oil is 0.6h -1 , the molar ratio of alcohol to oil is 5.8, the temperature in the reactor is 262°C, the pressure is 0.7MPa, and the acid value of the oil after reaction is 3.5mgKOH / g.

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PUM

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Abstract

The invention provides a method for reducing the acid value of oil materials, which comprises: reacting the oil materials of which the acid value is to be reduced and C1-C6 monobasic alcohol in a reactor, and collecting oil materials of which the acid value is reduced, wherein the temperature in the reactor is between 100 and 330 DEG C, and the pressure in the reactor is between 0.1 and less than 5 MPa. The method not only can effectively reduce the acid value of the oil materials but also can make the reaction continuously performed, does not generate waste acid, basically does not generate wastewater, and is favorable for environmental protection and subsequent processing.

Description

technical field [0001] The invention belongs to a method for processing oil, in particular to a method for reducing the acid value of oil. Background technique [0002] Oils and fats are generally derived from vegetable oils and animal oils, and the main component is glycerides. In addition, it also contains phosphoglycerides, fatty acids, fatty alcohols, vitamins, sterols, pigments, etc. Generally, the content of fatty acids in refined oils is very low, but the acid value of unprocessed and refined oils (commonly known as crude oil), used waste oils, and various fractions (such as deodorized distillates) produced during processing High, even very high, is not conducive to further processing and utilization. [0003] For example, crude oil and waste fats and oils can be used to produce biodiesel; biodiesel can be produced by transesterification of fats and oils with monoalcohols. Before using oil with high acid value to prepare biodiesel, it is generally necessary to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/04
Inventor 王海京杜泽学闵恩泽高国强张伟
Owner CHINA PETROLEUM & CHEM CORP
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