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A kind of preparation method of lye controlled-release nano-oxidant microcapsule

A technology of controlled release and oxidant, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problem of difficulty in preparing timed and concentrated release microcapsules with release time

Active Publication Date: 2018-11-20
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microcapsules with different shapes, sizes and sustained-release functions can be successfully prepared by using the above-mentioned film materials and preparation methods, but it is difficult to prepare time-controlled concentrated release microcapsules with a controllable release time.

Method used

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  • A kind of preparation method of lye controlled-release nano-oxidant microcapsule
  • A kind of preparation method of lye controlled-release nano-oxidant microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take by weighing oleic acid, lauryl alcohol and ethyl acetate of certain mass ratio in the reactor, oleic acid, lauryl alcohol, ethyl acetate respectively account for 0.5%, 0.4%, 85.16% of the total amount of feed intake, stirring reaction 5~6min;

[0025] (2) Add ammonium persulfate, epoxy resin, polyamide resin and silicon dioxide of a certain mass ratio, and ammonium persulfate, epoxy resin, polyamide resin and silicon dioxide account for 5%, 5% of the total amount of feed intake respectively , 3%, 0.1%, continue to react for 40-50 minutes;

[0026] (3) Slowly add a mixture of ethylenediamine and ethanol with a certain mass ratio, ethylenediamine and ethanol respectively account for 0.04% and 0.8% of the total amount of feed, continue to stir and react for 12-14h, wash twice with deionized water and ethanol , to obtain oxidant microcapsules.

[0027] figure 1 a is the scanning electron micrograph of oxidant microcapsules in embodiment 1; figure 1 B is a scann...

Embodiment 2

[0030] (1) Take by weighing oleic acid, lauryl alcohol and ethyl acetate of a certain mass ratio in the reactor, oleic acid, lauryl alcohol, ethyl acetate account for 0.9%, 0.6%, 75.93% of the total amount of feed respectively, stir reaction 5~6min:

[0031] (2) Add potassium persulfate, epoxy resin, polyamide resin and silicon dioxide of a certain mass ratio, ammonium persulfate, epoxy resin, polyamide resin and silicon dioxide account for 8%, 8% of the total amount of feed intake respectively , 5%, 0.3%, continue to react for 40-50 minutes;

[0032] (3) Slowly add a mixture of ethylenediamine and ethanol with a certain mass ratio, ethylenediamine and ethanol respectively account for 0.07% and 1.2% of the total amount of feed, continue to stir and react for 12-14h, wash twice with deionized water and ethanol , to obtain oxidant microcapsules.

Embodiment 3

[0034] (1) Take oleic acid, lauryl alcohol and ethyl acetate of a certain mass ratio in the reactor, oleic acid, lauryl alcohol, ethyl acetate account for 0.6%, 0.5%, 81.75% of the total amount of feed respectively, stir reaction 5~6min;

[0035] (2) add chromium trichloride, epoxy resin, polyamide resin and silicon dioxide of certain mass ratio, ammonium persulfate, epoxy resin, polyamide resin, silicon dioxide account for 6%, 6% of the total amount of feed intake respectively %, 4%, 0.1%, continue to react for 40-50 minutes;

[0036] (3) Slowly add a mixture of ethylenediamine and ethanol in a certain mass ratio, ethylenediamine and ethanol respectively account for 0.05% and 1% of the total amount of feed, continue to stir and react for 12-14h, wash twice with deionized water and ethanol , to obtain oxidant microcapsules.

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Abstract

The invention discloses a preparing method for alkali liquor controlled-release type nanometer oxidizing agent microcapsules. The preparing method comprises the following steps that firstly, oleic acid, lauryl alcohol and ethyl acetate in a certain mass ratio are weighed and put into a reactor, and a reaction is carried out for a period under stirring; secondly, an oxidizing agent, epoxy resin, polyamide resin and silicon dioxide in a certain mass ratio are added, and the reaction continues for a period; thirdly, a mixed solution of ethidene diamine and ethyl alcohol in a certain mass ratio is slowly added, the reaction continues for a period under stirring, washing is carried out two times with deionized water and two times with ethyl alcohol, and the oxidizing agent microcapsules are obtained. According to the preparing method for the alkali liquor controlled-release type nanometer oxidizing agent microcapsules, the prepared nanometer oxidizing agent microcapsules have the timing concentrated releasing function, and meanwhile the starting releasing time of the oxidizing agent microcapsules can be precisely controlled by regulating the concentration of alkali liquor.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to the technical field of increasing production and injection of oil-water wells such as microcapsule gel breakers and profile control water shutoff agents, and in particular to a method for preparing lye controlled-release nano-oxidant microcapsules. Background technique [0002] Microcapsule technology refers to the use of natural or synthetic polymer coating materials to wrap solid materials, liquid materials or gases with certain dispersibility to form a tiny particle with an obvious "core-shell" structure. The tiny particle is called for microcapsules. The coating material is usually called the capsule wall or wall material, and the material wrapped by the coating material is called the capsule core or core material. The properties of the prepared microcapsules, such as size, shape and controlled release performance, are closely related to parameters such as the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/70B01J13/02
CPCB01J13/02C09K8/706C09K2208/26
Inventor 左明明裴思静左晓兵陈奠宇曹振兴罗铭
Owner CHANGSHU INSTITUTE OF TECHNOLOGY