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Unsaturated fatty alcohol polypropylene oxide-polyoxyethylene segmented copolymer as well as preparation method and application thereof

A technology of alcohol polyoxypropylene polyoxyethylene block and enol polyoxypropylene ether, which is applied in the field of surfactants for tertiary oil recovery, can solve problems such as unsatisfactory effects, achieve good fluidity and water solubility, and increase viscosity Effect

Active Publication Date: 2018-06-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, practical application experiments show that the current fatty alcohol polyoxypropylene polyoxyethylene block copolymers are not very satisfactory when applied to the chemical flooding technology of Daqing Oilfield

Method used

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  • Unsaturated fatty alcohol polypropylene oxide-polyoxyethylene segmented copolymer as well as preparation method and application thereof
  • Unsaturated fatty alcohol polypropylene oxide-polyoxyethylene segmented copolymer as well as preparation method and application thereof
  • Unsaturated fatty alcohol polypropylene oxide-polyoxyethylene segmented copolymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this example, erucic acid C22 was used as a starting material to prepare a C22 fatty alcohol polyoxypropylene polyoxyethylene block copolymer containing unsaturated double bonds. The specific operation is as follows.

[0049] 1. Esterification reaction

[0050] (1) Reaction formula:

[0051] CH 3 (CH 2 ) 8 =(CH 2 ) 12 COOH+CH 3 CH 2 OH→CH 3 (CH 2 ) 8 =(CH 2 ) 12 COOCH 2 CH 3 +H 2 o

[0052] (2) Specifications of raw materials:

[0053] Industrial-grade high-purity erucic acid C22:1 content>95%, iodine value (gI 2 / 100g) 80-90, water content 99.0%, water content <0.1%

[0054] (3) Raw material ratio:

[0055] Erucic acid: ethanol = 1:5 (molar ratio)

[0056] (4) Synthesis process:

[0057] Add erucic acid and ethanol into the reaction kettle according to the molar ratio of 1:5 (molar ratio). After the temperature is raised to 90°C, the reaction starts. During the reaction, ethanol is gradually added (the ethanol is sufficiently excessive to make ...

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Abstract

The invention provides an unsaturated fatty alcohol polypropylene oxide-polyoxyethylene segmented copolymer as well as a preparation method and application thereof. The polymer is a C22 fatty alcoholpolypropylene oxide-polyoxyethylene segmented copolymer containing unsaturated double bonds, and has a structure shown in a general formula I as shown in the specification. The preparation method comprises the steps of carrying out reaction on erucic acid ethyl ester, acetic anhydride and a metal sodium sheet, and carrying out vacuum fractionation to obtain C22 enol; carrying out ring-opening reaction on C22 enol and propylene oxide to obtain C22 enol polyoxypropylene ether; and carrying out ethoxylation reaction on C22 enol polyoxypropylene ether and ethylene oxide to obtain the C22 enol polypropylene oxide- polyoxyethylene segmented copolymer. The C22 enol polypropylene oxide-polyoxyethylene segmented copolymer has excellent performance of emulsification of highly-viscous crude oil and an aqueous solution thickening performance, and has broad application potential in the fields of viscosity reduction of thickened oil by emulsifying, pour point depression of crude oil containing wax and tertiary oil recovery development of low-seepage oilfields.

Description

technical field [0001] The present invention relates to an unsaturated fatty alcohol polyoxypropylene polyoxyethylene block copolymer and its preparation method and application, in particular to a C22 fatty alcohol polyoxypropylene polyoxygen containing unsaturated double bond for tertiary oil recovery The ethylene block copolymer, its preparation method and its application in the field of tertiary oil recovery belong to the technical field of surfactants for tertiary oil recovery. Background technique [0002] Fatty alcohol polyoxypropylene polyoxyethylene block copolymer is a new type of nonionic surfactant. Because the polyoxypropylene block has hydrophobic characteristics, the lipophilicity of the surfactant molecule is increased; at the same time, due to the polyoxypropylene block The presence of hydrogen bonds between segment molecules, when the molecular weight increases and exceeds a certain concentration, the interaction between molecules will increase, forming a sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C09K8/588C09K8/035
CPCC08G65/2609C09K8/035C09K8/588
Inventor 张群周朝辉田茂章王红庄马德胜罗文利
Owner PETROCHINA CO LTD
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