based on co 2 /n 2 Preparation method of paraffin granules of switching emulsion and application of paraffin granules

A paraffin and emulsion technology, which is applied in the application of paraffin particles and the preparation of paraffin particles, can solve the problems of difficulty in preparing micron-scale paraffin particles, large particle size of paraffin particles, residual organic solvents, etc., so as to save production labor costs, The effect of uniform particle size distribution and improved dynamic-plastic ratio

Active Publication Date: 2022-04-08
SOUTHWEST PETROLEUM UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Among them, the preparation of particles by the emulsion method has simple process steps and is widely used at present, but most of the emulsions used are toxic and have the hazard of organic solvent residues.
[0008] In the prior art, the preparation method of paraffin wax particles is often prepared by melting and liquefying and then solidifying. Although the preparation method is simple, the prepared paraffin wax particles have a large particle size, and it is difficult to prepare micron-sized paraffin wax particles.

Method used

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  • based on co <sub>2</sub> /n <sub>2</sub> Preparation method of paraffin granules of switching emulsion and application of paraffin granules
  • based on co <sub>2</sub> /n <sub>2</sub> Preparation method of paraffin granules of switching emulsion and application of paraffin granules
  • based on co <sub>2</sub> /n <sub>2</sub> Preparation method of paraffin granules of switching emulsion and application of paraffin granules

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preparation example Construction

[0039] Based on the above technical problems, the inventor provides a CO-based 2 / N 2 The method for preparing paraffin particles of switch emulsion, which specifically includes the following steps: S1) Prepare the oil phase: add paraffin to N,N dimethylcyclohexylamine, and stir until the paraffin is completely dissolved, then add emulsifier A and stir until completely dissolved , to obtain the oil phase;

[0040] S2) Prepare the water phase: add the emulsifier B to deionized water, stir until the emulsifier B is completely dissolved, and obtain the water phase;

[0041] S3) preparing O / W emulsion: after mixing the oil phase and the water phase, stirring and emulsifying to obtain an O / W emulsion;

[0042] S4) Preparation of paraffin particles: carbon dioxide is introduced into the O / W emulsion, the paraffin particles are precipitated, and the paraffin particles and protonated solvent are obtained after centrifugation;

[0043] S5) Recycling: Nitrogen gas is passed into the ...

Embodiment 1

[0053] S1) Dissolve 12.5g of paraffin completely in 37.5g of N,N dimethylcyclohexylamine, then add 2.208g of Span-80, and stir until Span80 is completely dissolved to form an oil phase;

[0054] S2) Dissolving 1.472g of Tween-80 in deionized water to form an aqueous phase;

[0055] S3) under stirring conditions, slowly add the oil phase into the water phase, so that the concentration of emulsifier A + emulsifier B is 8%, forming an O / W emulsion;

[0056] S4) Pass CO into the emulsion 2 , the solvent N,N dimethylcyclohexylamine was dissolved in water, and centrifuged to obtain paraffin particles;

[0057] S5) The centrifuged supernatant was passed into N 2 , the supernatant is stratified into solvent and emulsifier aqueous solution, and the solvent and emulsifier aqueous solution are separated by a separatory funnel, and continue to be put into recycling.

[0058] recycle:

[0059] The solvent and emulsifier aqueous solution obtained after the first preparation above are co...

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Abstract

The present invention relates to a CO based 2 / N 2 The preparation method and the application of the paraffin particles of the switch emulsion relate to the technical field of paraffin particles; the preparation method specifically includes the following steps: S1) preparing the oil phase; S2) preparing the water phase; S3) preparing the O / W emulsion: After the oil phase and the water phase are mixed, they are stirred and emulsified to obtain an O / W emulsion; S4) preparation of paraffin particles: carbon dioxide is passed into the O / W emulsion, and the paraffin particles are precipitated, and after centrifugation, paraffin particles and a protonated solvent are obtained; S5) Circulation Utilization: feed nitrogen gas into the protonated solvent to obtain N, N dimethylcyclohexylamine and emulsifier aqueous solution, which are recovered and reused respectively; the invention also discloses the application of paraffin wax particles. The invention discloses a method for preparing paraffin wax particles with recyclable solvent and emulsifier aqueous solution, which saves raw materials, reduces costs and reduces environmental pollution; meanwhile, it also discloses the application of the product in drilling fluid.

Description

technical field [0001] The invention relates to the technical field of paraffin wax particles, in particular to a CO-based 2 / N 2 The preparation method of the paraffin particle of the switch emulsion and the application of the paraffin particle. Background technique [0002] At present, the preparation methods of particles mainly include the following types: [0003] (1) Emulsification-chemical cross-linking method. Hydrophilic materials can be used to prepare particles by emulsification-chemical cross-linking method, but the obtained particles are porous and have a large burst release. [0004] (2) Emulsification-heat curing method. Proteins are inactivated at high temperatures. The aqueous solution containing the drug protein is added to the oil phase for emulsification, and then the mixture is added dropwise into the high-temperature oil, stirred, solidified and separated to obtain granules. [0005] (3) In-liquid drying method. The two immiscible liquids are emul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L91/06C10G73/40C09K8/035C09K8/32
CPCC10G73/40C09K8/035C09K8/32
Inventor 郑存川扶浩然黄志宇张太亮王金玉吴洋
Owner SOUTHWEST PETROLEUM UNIV
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