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Method for preparing comb-shaped polymer crude oil desalting demulsifier

A comb-shaped polymer and demulsifier technology, which is applied in the field of preparation of comb-shaped polymer crude oil desalting demulsifier, can solve the problems of metal cation removal and weak binding ability, and achieve wide sources, good use safety and good dehydration The effect of the desalination effect

Active Publication Date: 2016-11-16
WUHAN HYPERBRANCHED POLYMER RESINS SCI& TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The demulsifier not only has a good effect of demulsification and dehydration, but also a large number of hydroxyl groups and other groups contained in the demulsifier molecule have a certain chelation ability for metal ions, but the binding ability is not strong, and it cannot remove different types and a large number of metal cations during dehydration. , need to improve

Method used

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  • Method for preparing comb-shaped polymer crude oil desalting demulsifier
  • Method for preparing comb-shaped polymer crude oil desalting demulsifier
  • Method for preparing comb-shaped polymer crude oil desalting demulsifier

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A kind of preparation of comb polymer crude oil desalting demulsifier comprises the steps:

[0045] (1) Acrylation modification of terminal hydroxyl groups of polyethylene glycol monomethyl ether: Take 1.75 g (5 mmol) of polyethylene glycol monomethyl ether (Mn=350) and dissolve it in 30 mL of acetonitrile solution, stir at room temperature, add 1.38 mL (10 mmol) of triethylamine, 0.9 g (10 mmol) of acryloyl chloride dissolved in 10 mL of acetonitrile solution was slowly added dropwise to the reaction solution, and reacted for 20 h. Filtrate, distill under reduced pressure, add 200 mL of ether to recrystallize three times, and dry in vacuum to obtain acrylated polyethylene glycol monomethyl ether.

[0046] (2) Preparation of glycidyl dimethyl dodecyl ammonium chloride: add 2.13g of dodecyl dimethyl tertiary amine to the three-necked flask equipped with agitator, dropping funnel and condensation reflux device, constantly stir , take 3.7g of epichlorohydrin through the d...

Embodiment 2

[0051] A kind of preparation of comb polymer crude oil desalting demulsifier comprises the steps:

[0052] (1) Acrylation modification of terminal hydroxyl groups of polyethylene glycol monomethyl ether: Take 3.75 g (5 mmol) of polyethylene glycol monomethyl ether (Mn=750) and dissolve it in 30 mL of acetonitrile solution, stir at room temperature, add 1.66 mL (12 mmol) of triethylamine, 1.35 g (15 mmol) of acryloyl chloride dissolved in 10 mL of acetonitrile solution were slowly added dropwise to the reaction solution, and reacted for 30 h. Filtrate, distill under reduced pressure, add 200 mL of methyl tert-butyl ether for recrystallization three times, and dry in vacuum to obtain acrylated polyethylene glycol monomethyl ether.

[0053] (2) Preparation of glycidyl dimethyltetradecyl ammonium chloride: add 2.41g tetradecyl dimethyl tertiary ammonium to a three-necked flask equipped with a stirrer, dropping funnel and condensing reflux device, constantly stir , take 3.7g of ep...

Embodiment 3

[0058] A kind of preparation of comb polymer crude oil desalting demulsifier comprises the steps:

[0059] (1) Acrylation modification of polyethylene glycol monomethyl ether terminal hydroxyl group: Take polyethylene glycol monomethyl ether (Mn=1000) 5g (5mmol) and dissolve it in 30mL acetonitrile solution, stir at room temperature, add 2mL ( 15mmol) of triethylamine, 1.8g (20mmol) of acryloyl chloride dissolved in 10mL of acetonitrile solution was slowly added dropwise to the reaction liquid, and reacted for 20h. Filtrate, distill under reduced pressure, add 200 mL of isopropyl ether for recrystallization three times, and dry in vacuum to obtain acrylated polyethylene glycol monomethyl ether.

[0060] (2) Preparation of glycidyl dimethyl cetyl ammonium chloride: add 2.69g cetyl dimethyl tertiary amine to a three-necked flask equipped with a stirrer, dropping funnel and condensation reflux device, constantly stir , Take 3.7g of epichlorohydrin and use the dropping funnel to ...

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Abstract

The invention relates to a method for preparing comb-shaped polymer crude oil desalting demulsifier. The method comprises the following steps: (1) performing acrylatioed modification on methoxy polyethylene glycol; (2) preparing glycidyl dimethyl alkyl ammonium chloride; (3) preparing quaternized carboxyalkyl chitosan; (4) reacting modified methoxy polyethylene glycol with quaternized carboxyalkyl chitosan to obtain the target product demulsifier. The demulsifier is prepared by using chitosan naturalpolymer compounds as raw materials, and has the advantages of wide source, nature, no toxicity, sustainability, good product biocompatibility, degradability and the like. The prepared demulsifier has good demulsification and dehydration effect since the molecular structure is a comb-shaped polymer formed by simultaneously grafting a plurality of linear branched chains on a main chain, and has a strong binding capability on metal cations, naphthenate radicals and other negatively charged ions and particles which are electronegative on surfaces since a great amount of carboxyalkyl groups and quaternary ammonium salt groups on the molecules. Therefore, the demulsifier has capabilities of demulsifying and removing oil-soluble salt.

Description

technical field [0001] The invention relates to a crude oil demulsifier, in particular to a preparation method of a comb-shaped polymer crude oil desalting demulsifier. Background technique [0002] With the rapid development of industry, the demand for oil is increasing, and it is of great significance to enhance oil recovery. As the use of chemical flooding continues to increase, coupled with the increasingly heavy and high acid value of crude oil, the content of metal ions in crude oil is gradually increasing. The salts in crude oil are mainly inorganic salts, most of which are soluble in the water contained in them, and water and oil form a stable water-in-oil (W / O) emulsion. The key to desalting crude oil is dehydration, and the key to dehydration is demulsification. The natural emulsion in crude oil is adsorbed at the oil-water interface to form a viscoelastic film with a certain strength, which creates a dynamic obstacle for the coalescence of emulsion droplets and ...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G65/332C08B37/08C10G33/04
CPCC08B37/003C08G65/3322C08G81/00C08G2650/04C08G2650/38C10G33/04C10G2300/201
Inventor 吕仁亮姚震范光坦王存文徐彩丽高肖梁成徐汶
Owner WUHAN HYPERBRANCHED POLYMER RESINS SCI& TECH CO LTD
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