Preparation method of W/O/W type multiple emulsion delaying chromium sol cross-linking system

A multi-emulsion and cross-linking system technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of short freezing time of multi-emulsion cross-linking agents, and achieve increased viscosity, improved flow profile, and improved recovery. Yield effect

Inactive Publication Date: 2015-08-12
NORTHEAST GASOLINEEUM UNIV
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide the preparation method of W/O/W type multiple emulsion delayed chromium sol crosslinking system, the preparation method of this W/O

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of W/O/W type multiple emulsion delaying chromium sol cross-linking system
  • Preparation method of W/O/W type multiple emulsion delaying chromium sol cross-linking system
  • Preparation method of W/O/W type multiple emulsion delaying chromium sol cross-linking system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (A) Add emulsifier Span-80 and residual oil to a certain amount of diesel oil, stir evenly, and serve as the oil phase for later use. The addition amount of emulsifier Span-80 is 2.8% of the total mass of the oil phase. Add residual oil The amount is 5% of the total mass of the oil phase;

[0044] (B) Preparation of crosslinking agent with 8% mass fraction (according to CrCl 3 Calculate), accurately weigh CrCl with analytical balance 3 ·6H 2 O, CH 3 COONa·3H 2 O is fully dissolved in a small beaker with distilled water, and the resulting solution contains n(Cr 3+ ):n(Ac - )=1:3, and then add the obtained solution to a 100mL volumetric flask, dilute the volume, and shake well. When the aging time is more than 3 days, the mother liquor of cross-linking agent chromium sol is dark green or slightly purple transparent liquid. Prepare a solution with a volume fraction of 2% as the internal water phase for later use.

[0045] (C) Mix the prepared oil phase and water phase in a vo...

Embodiment 2

[0052] (A) Add emulsifier Span-80 and residual oil to a certain amount of diesel oil, stir evenly, and serve as the oil phase for later use. The addition amount of emulsifier Span-80 is 2.8% of the total mass of the oil phase. Add residual oil The amount is 5% of the total mass of the oil phase;

[0053] (B) Preparation of crosslinking agent with 8% mass fraction (according to CrCl 3 Calculate), accurately weigh CrCl with analytical balance 3 ·6H 2 O, CH 3 COONa·3H 2 O is fully dissolved in a small beaker with distilled water, and the resulting solution contains n(Cr 3+ ):n(Ac - )=1:3, and then add the obtained solution to a 100mL volumetric flask, dilute the volume, and shake well. When the aging time is more than 3 days, the mother liquor of cross-linking agent chromium sol is dark green or slightly purple transparent liquid. Prepare a solution with a volume fraction of 2% as the internal water phase for later use.

[0054] (C) Mix the prepared oil phase and water phase in a vo...

Embodiment 3

[0061] (A) Add emulsifier Span-80 and residual oil to a certain amount of diesel oil, stir evenly, and serve as the oil phase for later use. The addition amount of emulsifier Span-80 is 2.8% of the total mass of the oil phase. Add residual oil The amount is 5% of the total mass of the oil phase;

[0062] (B) Prepare a crosslinking agent with a mass fraction of 8% based on CrCl3, and accurately weigh CrCl with an analytical balance 3 ·6H 2 O, CH 3 COONa·3H 2 O is fully dissolved in a small beaker with distilled water, and the resulting solution contains n(Cr 3+ ):n(Ac - )=1:3, then add the obtained solution to a 100mL volumetric flask, constant volume, fully shake, aging time more than 3d, the mother liquor of crosslinking agent chromium sol is dark green or slightly purple transparent liquid, and the volume fraction is 2% The solution is used as the internal water phase;

[0063] (C) Mix the prepared oil phase and water phase at a volume ratio of 3:7, use FA25 high-shear dispersin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a preparation method of a W/O/W type multiple emulsion delaying chromium sol cross-linking system. The preparation method comprises: (A) adding an emulsifier Span-80 and residual oil to diesel fuel, and uniformly stirring so as to be adopted as an oil phase for spare; (B) preparing a cross-linking agent with a mass fraction of 8-10% (calculated as CrCl3), weighing CrCl3.6H2O and CH3COONa.3H2O, dissolving to make the ratio of n(Cr<3+>) to n(Ac<->) in the obtained solution be 1:3 , and then preparing a solution with a volume fraction of 2% so as to be adopted as a water phase for spare; (C) mixing the prepared oil phase and the prepared water phase according to a volume ratio of 3:7, and emulsifying to form a primary emulsion; (D) preparing polyacrylamide into a 2000 ppm aqueous solution, wherein the ratio of the emulsifier mSpan-80 to the emulsifier mTween-80 in the aqueous solution is 7:3, and the Span-80 and the Tween-80 is 1.0-2.0% of the mass of the aqueous solution; (E) carrying out mixing emulsification the primary emulsion and the polyacrylamide solution according to a volume ratio of 1-7:1-3; and (F) adjusting the pH value of the prepared emulsion to 7-10. With the preparation method of the present invention, the cross-linking time can be delayed, and the gelation time can achieve 480 h.

Description

Technical field [0001] The invention relates to a preparation method of multiple emulsions, in particular to a preparation method of a W / O / W type multiple emulsion delaying chromium sol crosslinking system. Background technique [0002] Multiple emulsions were discovered by Seifritz in 1925. He described in the article "Stadies in emulsions (Ⅲ): Double reversal of oil emulsions occasioned by the same electrolyte" that the oil droplets of the O / W emulsion contained water droplets and noticed The droplets of W / O emulsion also contain fine oil droplets. However, it was not until 1965 that people began to prepare and study multiple emulsions purposefully. Multi-emulsion is a composite system shared by O / W type and W / O type emulsions. Oil droplets containing water droplets are suspended and dispersed in the water phase to form an emulsion called W / O / W type emulsion. The outer phase is water. The internal phase is oil droplets, but the oil droplets contain dispersed water droplets. T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K8/512C08J3/07
CPCC09K8/512C08J3/07C08J2333/26C09K2208/14
Inventor 张荣明艾立玲郝玉兰郭南南王艳锤赵锦宇孙秀秀
Owner NORTHEAST GASOLINEEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap