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Salt-resistant and temperature-resistant starch microspheres and preparation method and application thereof

A technology of starch microspheres and starch, applied in the field of microspheres, can solve the problems of lack of in-depth exploration of starch microspheres

Active Publication Date: 2019-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of in-depth exploration of the application of starch microspheres in high-temperature, especially high-salt environments in patents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Weigh 5 parts of potato starch and add to 100 parts of deionized water, then add 20 parts of triethanolamine, fully dissolve at room temperature. Then add 0.04 parts of epichlorohydrin, mix and react for 2h. Weigh 3.5 parts of MAPS into the starch solution, fully dissolve and mix. Add 0.06 parts of ammonium persulfate at 70°C and react for 4 hours. Add 3 parts of dimethyl hexadecyl sulfonate ethyl ammonium salt, mix well and obtain the feed liquid which is the aqueous phase A. Take another 250 parts of n-octane, add 30 parts of emulsifier (Span40:Tween60=2:3), stir at high speed to dissolve completely, and the obtained material liquid is oil phase B. Slowly pour A into B at 60°C and weigh 0.5 parts of CaCl 2 Prepare 20 parts of inorganic salt solution, and add it dropwise to the starch solution at the same temperature with 1 part of epichlorohydrin at the same time. The time of constant dropwise addition is 8 hours, and the reaction is continued for 2 hours after the...

Embodiment 2

[0051] Weigh 10 parts of wheat starch into 100 parts of deionized water, then add 10 parts of triethanolamine, and fully dissolve at 80°C. Then add 0.3 parts of g epichlorohydrin, mix and react for 3h. Weigh 5 parts of DMAPS into the starch solution, fully dissolve and mix. Add 0.02 parts of potassium persulfate at 60°C and react for 6 hours. Add 1 part of dimethyl dodecyl sulfopropyl ammonium salt, mix well, and the obtained material liquid is the aqueous phase A. Take another 750 parts of cyclohexane, add 250 parts of emulsifier (Span40:Tween40=2:1), stir at high speed to dissolve completely, and the obtained material liquid is oil phase B. Slowly pour A into B at 50°C, weigh 50 parts of NaCl to prepare 200 parts of inorganic salt solution, and drop them into the mixed phase at the same temperature with 0.3 parts of epichlorohydrin at the same time, and drop them at a constant speed for 5 hours. After the addition was completed, the reaction was continued for 2h. Then st...

Embodiment 3

[0053] Weigh 20 parts of mung bean starch and add to 100 parts of deionized water, then add 55 parts of triethanolamine, fully dissolve at 40°C. Then add 0.6 parts of epichlorohydrin, mix and react for 1h. Weigh 15 parts of DAPS into the starch solution, fully dissolve and mix. Add 0.2 parts of sodium persulfate at 80°C and react for 3 hours. Add 10 parts of dimethyl octadecyl sulfonyl butyl ammonium salt, and mix well to get the feed liquid which is the water phase A. Take another 450 ml of n-octane, add 100 parts of emulsifier (Span60:Tween40=3:1), stir at high speed to dissolve completely, and the obtained material liquid is oil phase B. Slowly pour A into B at 40°C and weigh 30 parts of MgCl 2Prepare 150 parts of inorganic salt solution, and add it dropwise to the starch solution at the same temperature with 14 parts of epichlorohydrin at the same time. The time of constant dropwise addition is 10 hours, and the reaction is continued for 2 hours after the addition is co...

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PUM

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Abstract

The invention discloses salt-resistant and temperature-resistant starch microspheres, and a preparation method and application thereof. Raw materials of the starch microspheres comprise: 100 parts ofdeionized water, 1-20 parts of starch, 10-55 parts of triethanolamine, 0.105-14.6 parts of epichlorohydrin, 0.1-20 parts of a zwitterionic monomer, 0.001-0.2 part of an initiator, 0.05-10 parts of a zwitterionic surfactant, 200-750 parts of an alkane compound, 10-250 parts of an emulsifier, 0.5-200 parts of an inorganic salt solution, and 200-750 parts of an organic solvent.

Description

technical field [0001] The invention belongs to the technical field of microspheres, and in particular relates to a starch microsphere and its preparation method and application. Background technique [0002] Shielding temporary plugging to protect oil and gas layer drilling technology (referred to as shielding temporary plugging technology) is mainly used to solve the problem of protecting oil and gas layers in multi-pressure formations in open hole sections, that is, to use two factors that damage oil and gas layers during drilling into oil and gas layers. The unfavorable factors (pressure difference and drilling fluid solid phase particles) are converted into favorable factors to protect oil and gas layers, and the purpose of reducing the damage to oil and gas layers caused by drilling fluid, cement slurry, pressure difference and soaking time is achieved. [0003] The basic idea of ​​shielding temporary plugging protection oil and gas layer drilling technology is to use ...

Claims

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Application Information

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IPC IPC(8): C09K8/516C09K8/514
CPCC09K8/514C09K8/516
Inventor 王晨杨超王陶张志智尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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