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Utilization method of crude glycerine

A technology of crude glycerin and glycerin, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of high production waste treatment cost, high investment and operation cost, and large loss of petroleum products, so as to save refining cost, short reaction time, The effect of increasing production

Active Publication Date: 2009-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkali neutralization method is relatively simple, but the sodium sulfate produced by the separation of naphthenic acid is seriously polluted, the loss of petroleum products is large, and the cost of production waste treatment is high; The efficiency is high, but a large amount of hydrogen is required for the reaction, and the investment and operation costs are high; the effect of heat treatment on acid reduction is obvious, but in practical applications, there are still problems such as uneven heating and easy coking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 200 grams of Penglai crude oil with an acid value of 3.28 mgKOH / g oil was added to a 500 milliliter three-necked flask with a distillation column, and 8.3 grams of crude glycerin (glycerin content 80% by weight, a by-product of Shijiazhuang Refining Biodiesel Pilot Plant) was added. Crude glycerol), 0.2 g of aluminum magnesium spinel, the molar ratio of glycerol to naphthenic acid is 6:1, the outlet temperature of the distillation column is controlled to be 120°C, the temperature of the flask is 250°C, electric stirring is performed, and the reaction is carried out for 60min. The acid value of the deacidified Penglai oil is 0.22 mgKOH / g oil, and the acid reduction rate is 93.3%.

Embodiment 2

[0028]Add 200 grams of Penglai crude oil with an acid value of 3.28 mgKOH / g oil into a 500 milliliter three-necked flask with a distillation column, add 27.5 grams of crude glycerin (glycerol content 80% by weight, by-product of Shijiazhuang Refining Biodiesel Pilot Plant) Crude glycerin), 0.50 g of aluminum magnesium spinel, the molar ratio of glycerol to naphthenic acid is 20:1, the outlet temperature of the distillation column is controlled at 120 ° C, the temperature of the flask is 260 ° C, magnetic stirring, and reaction for 10 min. The acid value of the obtained reacted Penglai crude oil was 0.40 mgKOH / g oil, and the acid reduction rate was 87.8%.

Embodiment 3

[0032] Add 200 grams of Penglai crude oil with an acid value of 3.28 mgKOH / g oil into a 500 milliliter three-necked flask with a distillation column, add 2.0 grams of crude glycerin (glycerin content 80% by weight, by-product of Shijiazhuang Refining Biodiesel Pilot Plant) Crude glycerol), 2.0 g of aluminum magnesium spinel, the molar ratio of glycerol to naphthenic acid is 1.5:1, the outlet temperature of the distillation column is controlled to be 120° C., the temperature of the flask is 280° C., magnetic stirring is carried out, and the reaction is carried out for 120 minutes. After the reaction, the acid value of Penglai oil was 0.48mgKOH / g oil, and the acid reduction rate was 85.4%.

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PUM

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Abstract

The invention relates to a method for utilizing the crude glycerine. The method comprises the steps that the crude glycerine, hydrocarbon oil containing petroleum acid contact with esterification reaction catalyzer to have the esterification reaction at 200 to 300 DEG C, the mol ratio of the glycerine to the petroleum acid is 1 to 20:1, the contacting time is 1 to 120 min, and the esterification reaction catalyzer can be one or more than one of alkali-earth oxide, magnesia alumina spinel, alkali-earth oxide loading base metal inorganic salt, and magnesia alumina spinel loading base metal inorganic salt. The method has the advantages of low reaction temperature and short reaction time, and develops a novel approach for utilizing the crude glycerine.

Description

technical field [0001] The invention relates to an application method of glycerin. Background technique [0002] Glycerin is a polyhydric alcohol, also known as glycol, glycerol, molecular formula C 3 h 8 o 3 , is a colorless, odorless, viscous liquid with excellent hygroscopicity and sweet taste, with a boiling point of 290°C (decomposition), and a relative density of 1.2613 (d 4 20 ). Glycerin is miscible with water, alcohols (such as methanol, ethanol, n-propanol, isopropanol, butanol, 2-methylbutanol) and phenols (such as phenol, etc.). Slightly soluble in ethylene ether and ethyl acetate, etc., but insoluble in hydrocarbons, long-chain fatty alcohols, ethers and halogenated solvents, and also in oils and fats. It is a good solvent for many inorganic salts and gases. [0003] Glycerin is chemically active and can participate in various reactions of alcohols, such as esterification, etherification, cyclization, salt formation and transesterification. Glycerin is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22
Inventor 张伟谢丽李子锋杜泽学慕旭宏宗保宁闵恩泽
Owner CHINA PETROLEUM & CHEM CORP
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