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Method for preparing thickened oil pour point depressant by taking cholic acid as raw material

A technology of pour point depressant and cholic acid, which is applied in the field of preparation of heavy oil pour point depressant, to achieve the effect of simple and reliable process, lowering the freezing point of heavy oil, and good thick oil freezing point

Inactive Publication Date: 2017-01-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are various pour point depressants in the prior art, such as polyethylene-ethylene acetate, polyoctearyl acrylate, etc., there is still a need for efficient and stable pour point depressants in oil field production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] (1) Add 0.3 mol of cholic acid and 0.3 mol of N, N-dimethyl-1, 3-propanediamine into a reaction vessel with a water separator, and add 0.5 g of potassium hydroxide. After mixing, place in an oil bath Gradually raise the temperature to 180°C to dissolve the cholic acid, keep it warm at 180°C for 8 hours, stop heating when no water comes out, and cool to room temperature for use;

[0008] (2) Add the above-mentioned reaction product into a reaction vessel with a stirring device, pass nitrogen gas to drive out the air in the reactor, heat up to 105°C for about 15 minutes, and slowly drop 0.15mol of pentanediol dishrinkle into it with a dropping funnel Glycerol ether, reaction 4.0h. A pale yellow viscous liquid product was obtained.

Embodiment 2

[0010] The crude oil samples were 1-6# waxy dehydrated crude oils respectively, and their freezing points were measured respectively according to the national standard GB / T510-83 with a DYH-201A freezing point tester (Dalian Yuhe Petroleum Instrument Co., Ltd.). The product prepared in Example 1 was formulated into 0.1% kerosene solution for subsequent use. Take 100g of the waxy crude oil samples above, add 0.05g of kerosene solution (5ppm) with 0.1% chemical concentration, stir evenly at 50°C, and measure the pour point depressing ability of the chemical to crude oils with different freezing points. According to the above-mentioned same method, measure the freezing point of the crude oil that dosage is 0.1g (10ppm), 0.3g (30ppm), 0.5g (50ppm), 0.7g (70ppm), 1.0g (100ppm) respectively, the results are shown in Table 1 -6. From Table 1-6, it can be seen that the pour point depressing effect of the agent in Example 1 on high pour point crude oil is better. Increase, the freezi...

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PUM

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Abstract

The invention relates to a method for preparing a thickened oil pour point depressant by taking cholic acid as a raw material. Cholic acid and N,N-dimethyl-1,3-propylene diamine undergo amidation to generate cholic acid amide with the end groups containing tertiary amines, and then bimolecular cholic acid amide with the end groups containing the tertiary amines and monomolecular pentyl glycol diglycidyl ether react to generate gemini type amphiphilic molecules containing two cholic acid hydrophobic chains. The compound has good capability of reducing a condensation point of thickened oil. The preparation method is simple in process, and the novel way for preparing the thickened oil pour point depressant is provided.

Description

technical field [0001] The invention belongs to the field of oil recovery additives for oilfields, in particular to a method for preparing a heavy oil pour point depressant from cholic acid as a raw material. Background technique [0002] In recent years, most oilfields in my country have entered the middle and late development stage. With the continuous increase of heavy oil production, the characteristics of high freezing point and poor fluidity have brought great difficulties to the extraction and transportation of crude oil, and the development of waxy heavy oil The key lies in how to lower the freezing point of crude oil and improve its fluidity. Although there are various pour point depressants in the prior art, such as polyethylene-ethylene acetate, polyoctearyl acrylate, etc., efficient and stable pour point depressants are still needed in oil field production. [0003] Bile acid belongs to sterols and has a molecular structure similar to cholesterol. Cholesterol pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J9/00
CPCC07J9/005
Inventor 麻金海孔淑玲
Owner QINGDAO UNIV