Method for preparing dendrimer antiphase demulsifier

A reverse-phase demulsifier and dendritic technology, which is applied in the field of preparation of dendritic reverse-phase demulsifiers, can solve the problems of long processing time and large addition amount

Inactive Publication Date: 2011-11-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different types of inverse demulsifiers have obvious differences in their functions and effects in the process of inverse demulsification of oilfield sewage. Generally speaking, inorganic polymers have fast demulsification speed, but the addition amount is large, and the addition amount of linear organic polymers is small. , but the processing time is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Embodiment. This example is made up of dendritic polyamide-amine (PAMAM), epichlorohydrin, dimethylamine, epichlorohydrin from 1.0 generation to 3.0 generation; Its proportioning is: in total weight is 100, 1.0 Dendritic polyamidoamine (PAMAM) from generation to generation 3.0 accounts for 8%, epichlorohydrin accounts for 35%, and dimethylamine accounts for 15%, forming an aqueous solution containing 58% of the above-mentioned composition.

[0015] The preparation method of this dendritic inverse demulsifier:

[0016] First, dendritic polyamide-amine (PAMAM) from generation 1.0 to generation 3.0 was synthesized;

[0017] The reaction includes two processes: one is the Michael addition reaction of ethylenediamine and methyl acrylate, and the polyester obtained by the reaction undergoes amidation reaction with ethylenediamine to obtain an amide, and the Michael addition and amidation reactions are carried out alternately to obtain To obtain macromolecular dendrimers: pol...

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PUM

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Abstract

The invention discloses a method for preparing a dendrimer antiphase demulsifier used for demulsifying crude oil. Based on the total weight, 0.1 to 10 percent of 1.0 generation, 2.0 generation and 3.0 generation dendrimer polyamide-amine, 10 to 45 percent of epoxy chloropropane, and 5 to 22 percent of dimethylamine form an aqueous solution containing 10 to 40 percent of the composition at different concentrations. The method comprises the following steps of: synthesizing the 1.0 generation, 2.0 generation and 3.0 generation dendrimer polyamide-amine; taking 1.0 generation dendrimer polyamide-amine, 2.0 generation dendrimer polyamide-amine and 3.0 generation dendrimer polyamide-amine in different ratios, adding a proper amount of epoxy chloropropane at the temperature of below 40DEG C, reacting for 2 to 4 hours, adding a certain amount of dimethylamine, dripping epoxy chloropropane accounting for 90 percent of the total addition amount into the mixed solution, heating to the temperature of between 85 and 95DEG C, reacting for 1 hour; and adding the rest 10 percent of epoxy chloropropane by three times at time intervals of 20 minutes, and keeping the temperature of between 85 and 95DEG C until the reaction is fully carried out.

Description

technical field [0001] The invention relates to a preparation method of a dendritic reverse phase demulsifier for crude oil demulsification. Involved in the field of oil industry technology. Background technique [0002] With the rapid development of oil fields and the use of a large number of electric submersible pumps, the oil production volume increases and the water content increases. Due to the high shear speed of the electric submersible pump, the emulsification of crude oil in water is serious, which increases the turbidity of crude oil dehydration, and puts forward higher requirements for the performance of inverse demulsifier. Commonly used inverse demulsifiers include polyferric sulfate, polyaluminum chloride, polyacrylamide, ammonia-epichlorohydrin polycondensate, and ammonia-dimethylamine-epichlorohydrin polymer. Dendritic polymers are used in crude oil demulsification. Different types of inverse demulsifiers have obvious differences in function and effect in ...

Claims

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Application Information

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IPC IPC(8): C08G69/48C08G59/10C02F1/52C02F1/40
Inventor 李锦昕徐诚尹国栋赵凤英
Owner BC P INC CHINA NAT PETROLEUM CORP
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