Dendritic reverse demulsifier and preparation method thereof

A reversed-phase demulsifier and dendritic technology, applied in the field of dendritic reversed-phase demulsifier and its preparation, can solve the problems of large addition amount and long processing time, etc.

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
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Embodiment Construction

[0014] Example. This example is composed of dendritic polyamide-amine (PAMAM), epichlorohydrin, dimethylamine, and epichlorohydrin of the 1.0 to 3.0 generation; the ratio is: in the total weight of 100, 1.0 The dendritic polyamide-amine (PAMAM) from generation to 3.0 accounts for 8%, epichlorohydrin 35%, and dimethylamine 15% to form an aqueous solution containing 58% of the above composition.

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

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

[0017] The reaction consists of two processes: one is the Michael addition reaction of ethylenediamine and methyl acrylate, the polyester obtained by the reaction, and then amidation reaction with ethylenediamine to obtain amides, by alternately performing Michael addition and amidation reactions. Obtain macromolecular dendrimers: polyamide-amine; to synthesize dendritic polyamide-amines of generation 1.0, 2.0 and 3.0, you n...

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PUM

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Abstract

The invention provides a dendritic reverse demulsifier used for demulsification of crude oil and a preparation method thereof. The dendritic reverse demulsifier is an aqueous solution with different concentration containing 10%-40% of composite composed of the following materials based on total weight of 100%: 0.1%-10% of dendritic polyamidoamine (PAMAM) from 1.0 to 3.0 generation, 10-45% of epichlorohydrin and 5-22% of dimethylamine (DMA). The preparation method comprises the following steps: firstly synthesizing the dendritic PAMAM from 1.0 to 3.0 generation; taking 1.0, 2.0 and 3.0 generation dendritic PAMAM based on different proportions, adding a proper amount of the epichlorohydrin for reacting at the temperature of below 40 DEG C for 2-4 hours, adding a certain amount of the DMA, adding the epichlorohydrin which accounts for 90% of total added amount to the obtained mixed solution, and heating to 85-95 DEG C for reacting for 1 hour; and adding 10% of the residual epichlorohydrin at three times (once every 20 minutes), and keeping the temperature of 85-95 DEG C until the reaction is completed.

Description

Technical field [0001] The invention is a dendritic inverse demulsifier for crude oil demulsification and a preparation method thereof. Involved in the technical field of the petroleum industry. 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 and water content have increased. Due to the high-speed shear of the electric submersible pump, the crude oil is seriously emulsified in the water, which increases the turbidity of the crude oil dehydration, and puts forward higher requirements on the performance of the inverse demulsifier. Commonly used inverse demulsifiers include polyferric sulfate, polyaluminum chloride, polyacrylamide, ammonia-epichlorohydrin polycondensate, and ammonia-dimethylamine-epichlorohydrin polymer, etc. Someone will use polyamide-amine Dendrimers are used to demulsify crude oil. Different types of inverse demulsifiers have obvious differences in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/52C09K23/52
Inventor 李锦昕徐诚尹国栋赵凤英
Owner BC P INC CHINA NAT PETROLEUM CORP
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