Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of nonionic-anionic compound type surfactant and application thereof

A surfactant and anion technology, applied in the preparation of carboxylate, chemical instruments and methods, drilling composition, etc., can solve the problem of no patent application paper report, etc., to achieve improved oil recovery and excellent performance , the effect of simple synthesis process

Inactive Publication Date: 2012-06-27
JIANGNAN UNIV
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also many domestic reports on the synthesis and application of alcohol ether carboxylates, but so far there are no patent applications and paper reports on the use of alcohol ether carboxylates for alkali-free binary compound flooding

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 nonionic-anionic compound type surfactant and application thereof
  • Preparation method of nonionic-anionic compound type surfactant and application thereof
  • Preparation method of nonionic-anionic compound type surfactant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Coco alcohol polyoxyethylene ether (2) carboxylate (C 12-14 E. 2 C) Preparation: Put 20 g of natural coconut oil alcohol polyoxyethylene ether (2) (China Light Chemical Co., Ltd.) into a 250 mL glass reactor, take chloroacetic acid: alcohol ether molar ratio is 1.1: 1, first add Half of the chloroacetic acid was stirred and mixed, and the temperature was raised to 55°C. According to the NaOH: chloroacetic acid molar ratio of 2.5: 1 to determine the amount of solid NaOH added, first add half of the NaOH, react at 55 ° C for 0.5 hours, then add the other half of the chloroacetic acid and solid sodium hydroxide, continue the reaction 5-6 Hour. After the reaction is completed, the product is heated and dissolved in absolute ethanol, and the insoluble inorganic salt is removed by filtration. After the filtrate was further cooled and left to stand, the alcohol ether carboxylate was precipitated, filtered with suction, and the filter cake was vacuum-dried at 70°C to obtain ...

Embodiment 2

[0030] Cetyl alcohol polyoxyethylene ether (3) carboxylate (C 16 E. 3 C) Preparation: Add cetyl alcohol (analytical grade, Aladdin) to an average of 3 mol of ethylene oxide under base-catalyzed conditions to obtain cetyl alcohol polyoxyethylene ether (3). Put 20g of the alcohol ether into a 250 mL glass reactor, heat and melt, determine the molar ratio of chloroacetic acid:alcohol ether is 1.1:1, first add half of the chloroacetic acid, stir and mix, according to the molar ratio of NaOH:chloroacetic acid is 2.5:1 Determine the amount of solid NaOH added, add half of it first, react at 60°C for 0.5 hours, then add the other half of chloroacetic acid and solid sodium hydroxide, and continue the reaction for 5-6 hours. After the reaction is completed, the product is heated and dissolved in absolute ethanol, and the insoluble inorganic salt is removed by filtration. After the filtrate was further cooled and left to stand, the alcohol ether carboxylate was precipitated, filtered ...

Embodiment 3

[0034] Coco alcohol polyoxyethylene ether (2) carboxylate (C) prepared by utilizing embodiment 1 12-14 E. 2 C) It is used to reduce the crude oil / formation water interfacial tension of Daqing No. 4 Plant under alkali-free conditions: the C 12-14 E. 2 C is compounded with carboxy betaine. The carboxy betaine used is produced by Rhodia Feixiang Chemical Co., Ltd. or synthesized by carboxymethylation with tertiary amine produced by Rhodia Feixiang Chemical Co., Ltd. The mixed surfactant is dissolved in Daqing Four Plant formation water, the total concentration (mass fraction) is 0.05%~0.3%, of which C in the mixed surfactant 12-14 E. 2 C mole fraction 0.20. 1000 mg / L polymer (polyacrylamide, molecular weight: 25 million) was pre-dissolved in formation water, and the interfacial tension of crude oil from Daqing No. Figure 5 shown. It can be seen that within the concentration range of determination, the equilibrium interfacial tension (120 min) reaches 10 -3 On the order o...

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 invention relates to a preparation method of a nonionic-anionic compound type surfactant and an application thereof, which belongs to the technical field of colloid and surface chemistry. The nonionic-anionic compound type surfactant is obtained by the addition of straight-chain saturated fatty alcohol and ethylene oxide and then carboxymethylation, and is called alcohol ether carboxylate for short. The atomic number of alkyl carbon of the fatty alcohol is 12-18, and the number n of added ethylene oxide is 2-5. The nonionic-anionic compound type surfactant is compounded with a betaine type amphoteric surfactant, wherein the mole faction of the alcohol ether carboxylate is 0.10-0.50, the mixed surfactant is solved in Daqing oilfield formation water or simulated formation water, and under the conditions that the total surfactant mass concentration is 0.05%-0.4%, 1000mg / L polyacrylamide is added, alkali is not added and the temperature is 45 DEG C, the interfacial tension of Daqing crude oil / formation water is reduced to 10-3mN / m orders of magnitude.

Description

technical field [0001] The invention discloses a preparation method and application of a nonionic-anionic composite surfactant, belonging to the technical field of colloid and interface chemistry. Background technique [0002] In 2011, my country's dependence on foreign crude oil has exceeded 55%, surpassing that of the United States. On the other hand, increasing oil reserves by exploring new fields has become increasingly difficult. Therefore, "tertiary oil recovery" for old oilfields and further enhancement of oil recovery has become a strategic measure for stable and high crude oil production in my country. [0003] Usually, only 30% to 40% of the underground oil reserves can be recovered through primary oil recovery (self-injection) and secondary oil recovery (water flooding), that is, 60% to 70% of the crude oil remains underground. These so-called residual oils are usually trapped in the pores of porous rocks and are difficult to flow out under normal water injectio...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/125C07C51/41C09K8/584
Inventor 崔正刚许园园税向强蒋建中王峰裴晓梅
Owner JIANGNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com