Comb-shaped polysiloxane crude-oil demulsifying agent and preparation method thereof

A crude oil demulsifier, polysiloxane technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of different, demulsification ability can not meet the current needs, the crude oil composition is very different, etc., to achieve water separation Fast, reduce the oil-water interfacial tension and interfacial strength, the effect of a wide range of applications

Inactive Publication Date: 2013-05-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the different geographical environments in different places, the composition of crude oil varies greatly, and the requirements for crude oil demulsifiers are also different. The demulsification ability of existing crude oil demulsifiers can no longer meet the current needs, so it is urgent to develop a demulsification ability Strong, wide applicability new crude oil demulsifier

Method used

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  • Comb-shaped polysiloxane crude-oil demulsifying agent and preparation method thereof
  • Comb-shaped polysiloxane crude-oil demulsifying agent and preparation method thereof
  • Comb-shaped polysiloxane crude-oil demulsifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of comb polysiloxane crude oil demulsifier comprises the following steps:

[0037] 1) Preparation of propylene glycol polyoxyethylene polyoxypropylene acrylate

[0038] Weigh 20.00g of propylene glycol polyoxyethylene polyoxypropylene ether (molecular weight 2000), 1.73g of acrylic acid, 0.43g of catalyst p-toluenesulfonic acid, 0.13g of polymerization inhibitor hydroquinone, and add In a three-necked flask with a condenser tube and a thermometer, heat to 140°C and reflux for 6 hours;

[0039] After the reaction was completed, the reactant was poured into a pear-shaped separatory funnel, 50ml of dichloromethane was added to make it completely dissolved, and then the pH was adjusted to neutrality with 0.05mol / L NaOH solution, after shaking well, the mixture was allowed to stand for stratification, and the mixture was separated. The lower layer liquid is removed, and the dichloromethane is evaporated with a rotary evaporator to obtain the product p...

Embodiment 2

[0046] The preparation method of comb polysiloxane crude oil demulsifier comprises the following steps:

[0047] 1) the preparation of propylene glycol polyoxyethylene polyoxypropylene acrylate is the same as Example 1

[0048] 2) Hydrosilation reaction

[0049] Weigh 20 g of hydrogen-containing silicone oil (hydrogen content 0.185%), 14.12 g of isopropanol, and 60 ppm of chloroplatinic acid into a four-necked flask equipped with a dropping funnel, a spherical condenser, a thermometer, and a stirrer, and heat to 110° C.;

[0050]The prepared propylene glycol polyoxyethylene polyoxypropylene acrylate 12.98g, methacrylic acid 0.53g, and methyl methacrylate 1.85g were mixed, then added to the hydrogen-containing silicone oil system at 110°C and slowly added dropwise for two hours to react. After the dropwise addition, the reaction was continued at 110°C for 4 hours;

[0051] 3) Separation of comb polysiloxane crude oil demulsifier

[0052] After the hydrosilylation reaction wa...

Embodiment 3

[0054] The preparation method of comb polysiloxane crude oil demulsifier comprises the following steps:

[0055] 1) the preparation of propylene glycol polyoxyethylene polyoxypropylene acrylate is the same as Example 1

[0056] 2) Hydrosilation reaction

[0057] Weigh 20 g of hydrogen-containing silicone oil (hydrogen content 0.185%), 14.12 g of isopropanol, and 60 ppm of chloroplatinic acid into a four-necked flask equipped with a dropping funnel, a spherical condenser, a thermometer, and a stirrer, and heat to 110° C.;

[0058] The prepared propylene glycol polyoxyethylene polyoxypropylene acrylate 15.58g, methacrylic acid 1.70g, and methyl methacrylate 0.25g were mixed, then added to the hydrogen-containing silicone oil system at 110°C and slowly added dropwise for two hours to react. After the dropwise addition, the reaction was continued at 110°C for 4 hours;

[0059] 3) Separation of comb polysiloxane crude oil demulsifier

[0060] After the hydrosilylation reaction w...

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Abstract

The invention discloses a comb-shaped polysiloxane crude-oil demulsifying agent and a preparation method thereof. The invention is modified by silicon oil, and by hydrosilation reaction, crylic-acid polyoxyethylene polyoxypropylene ester, methacrylic acid and acrylate are respectively connected onto linear polysiloxane of the silicon oil. The comb-shaped polysiloxane crude-oil demulsifying agent provided by the invention not only can reduce the tension and the strength of an oil-water interface, but also has good hydrophilic capability and oleophylic capability, so that a product is applicable to oil-in-water type crude oil emulsion and water-in-oil type crude oil emulsion and has the advantages of less use amount, fast water distribution, low demulsification temperature, wide applicationrange and the like.

Description

technical field [0001] The invention belongs to a demulsifier for crude oil dehydration treatment, and relates to a comb-type polysiloxane crude oil demulsifier and a preparation method thereof. Background technique [0002] Crude oil demulsifier is a chemical reagent used in the dehydration of crude oil. At present, mainly used are polyoxyethylene polyoxypropylene ether series demulsifiers and their compound products and polymerization Physical crude oil demulsifier. [0003] As the exploitation of various oilfields has entered the late stage of oil recovery one after another, the continuous application of various oilfield chemicals has made it more and more difficult to break the emulsion of crude oil. In addition, due to the different geographical environments in different places, the composition of crude oil varies greatly, and the requirements for crude oil demulsifiers are also different. The demulsification ability of existing crude oil demulsifiers can no longer me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08G77/38C08G65/332C10G33/04
Inventor 陈诚郭睿宋军旺赵鹏飞孙滨涛马璐
Owner SHAANXI UNIV OF SCI & TECH
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