Preparation method of demulsifier for oil fields

A demulsifier and oil field technology, applied in the direction of chemical dehydration/demulsification, etc., to achieve high molecular weight, good broad spectrum and ideal dehydration effect

Active Publication Date: 2011-06-15
JURONG NINGWU CHEM
View PDF4 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems existing in the existing polyether demulsifiers, the object of the present invention is to provide a method for preparing demulsifiers for oilfields. On the basis of preparing polyether demulsifiers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention is further described below through specific examples, but the examples are not limitations of the present invention.

[0018] A preparation method of demulsifier for oil field, comprising the following steps:

[0019] ①Synthesis of polyether demulsifier A: add 50 grams of methanol and 35 grams of potassium hydroxide into the reactor, heat up, feed 6750 grams of propylene oxide, control the temperature at 115-165 ° C, maintain the pressure below 0.6 MPa, and Make it fully react, vacuum for 1 hour, then pass 3200 g of ethylene oxide, control the temperature at 115-165 °C, keep the pressure below 0.3 MPa, and make it fully react to prepare polyether demulsifier A, for future use .

[0020] Aliphatic alcohols are one or more mixtures of methanol, ethanol, propanol, butanol, stearyl alcohol, ethylene glycol, propylene glycol, butanediol, glycerol, trimethylolpropane, and pentaerythritol. This example uses methanol.

[0021] The catalyst is one or mor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a demulsifier for oil fields. In the method, fatty alcohol is used as a raw material, and the demulsifier is prepared by crosslinking and modifying after reacting the fatty alcohol with oxirane and epoxypropane. First, the fatty alcohol is used as an initiator, and a polyether demulsifier A is prepared by reacting the fatty alcohol with propylene oxide and ethylene oxide in the presence of a basic catalyst. Then, a product B is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A with polycarboxylic acid under the action of the catalyst. Finally, a final product, i.e. the high-performance demulsifier, is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent with adoption of toluene diisocynate. The demulsifier prepared with the method has the advantages of high relative molecular weight, ideal dewatering effect and good broad spectrum property, and can be used for demulsifying and dewatering oil field crude oil. Separated water is clear, and the use amount of the demulsifier is small.

Description

technical field [0001] The invention relates to a preparation method of a demulsifier, in particular to a preparation method of an oilfield demulsifier used for oil field crude oil collection and transportation dehydration treatment. Background technique [0002] Water is often mixed in the oil extraction process, and the crude oil must be dehydrated before transportation to reduce transportation costs. The free water in crude oil is easy to separate and remove, while the removal of emulsified water in crude oil generally requires the addition of demulsifiers. At present, polyether demulsifiers are mainly used in China. The hydrogen compound is used as an initiator, and under the action of an alkali metal catalyst, it undergoes anionic ring-opening polymerization reaction with an oxyalkylene to prepare a polyoxyethylene polyoxypropylene ether demulsifier. This process has many side reactions when preparing higher molecular weight polyether, the obtained polyether has a rela...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G18/48C08G65/28C08G65/332C08G63/668C10G33/04
Inventor 应珏翟洪金应军
Owner JURONG NINGWU CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap