Fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate, preparation thereof and application thereof

A technology of alcohol polyoxypropylene polyoxyethylene ether carboxylate and polyoxypropylene polyoxyethylene ether carboxylate is applied in the field of fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate and its preparation and application, and can solve the problem of Difficulty in selecting fatty alcohols and other problems to achieve the effect of enhancing lipophilicity

Inactive Publication Date: 2012-06-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a surfactant used in tertiary oil recovery, the conventional fatty alcohol polyoxyethylene ether carboxylate is too hydrophilic, even if its hydrophilic polyoxyethylene ether chain segment is shortened to one or two degrees of polymerization, it needs To obtain a surfactant suitable for tertiary oil recovery, the length of the fatty alcohol in the hydrophobic group segment also needs to be adjusted between 30-40, which is undoubtedly very difficult for the selection of fatty alcohol

Method used

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  • Fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate, preparation thereof and application thereof
  • Fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate, preparation thereof and application thereof
  • Fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate, preparation thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] synthetic compound

[0048] 1. Synthetic reaction of fatty alcohol polyoxypropylene polyoxyethylene ether

[0049] The fatty alcohol here is fatty alcohol or alkylphenol with a total C length of 8-22, which can be straight chain or branched, preferably straight chain, and the required PO length and EO length can be obtained through the raw material ratio.

[0050]Add a certain amount of fatty alcohol and powdered potassium hydroxide into the high-pressure reactor, stir, and feed N when the temperature rises to 50-60°C. 2 Make protective gas, continue to heat up to about 120 ℃. in N 2 Propylene oxide was added under protection for two hours. After the addition was complete, the temperature was raised to 140°C, and the reaction was carried out at a constant temperature for two hours. Then, it was naturally cooled to room temperature to obtain fatty alcohol polyoxypropylene ether.

[0051] Add a certain amount of fatty alcohol polyoxypropylene ether and powdered potassi...

Embodiment 2

[0066] Application in Tertiary Oil Recovery

[0067] The US Texas-500 interfacial tensiometer was selected, and the interfacial tension was measured by the spin drop method. The crude oil measured is Xinjiang Karamay crude oil.

[0068] Table 1: C 16 PO 8 EO 2 CH 2 Interfacial tension values ​​of COOK at different weak base concentrations

[0069]

[0070] Table 2: C 18 PO 10 EO 3 CH 2 Interfacial tension values ​​of COOK at different weak base concentrations

[0071]

[0072] Table 1 for 0.3% C 16 PO 8 EO 2 CH 2 COOK in different weak bases (Na 2 CO 3 ) concentration of interfacial tension in crude oil. in Na 2 CO 3 When the concentration is 0.2% to 0.4%, the surfactant quickly reaches an ultra-low interfacial tension value.

[0073] Table 2 for 0.3% C 18 PO 10 EO 3CH 2 COOK in different weak bases (Na 2 CO 3 ) concentration in crude oil interfacial tension value, in Na 2 CO 3 At higher concentrations, the surfactant quickly reaches an ultra-l...

Embodiment 3

[0075] Natural outcrop cores with a length of 30 cm and a diameter of 3.8 cm were selected indoors to evaluate the displacement efficiency of weak alkali combined flooding. The tensio-active agent of weak base composite system adopts the C in the embodiment (2) 16 PO 8 EO 2 CH 2 COOK and C 18 PO 10 EO 3 CH 2 COOK, the polymer uses 25 million polyacrylamide HPAM, and the crude oil is Xinjiang dehydrated crude oil.

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Abstract

The invention relates to a fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate, a preparation thereof and an application thereof. The structural general formula of the fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate is RO(PO)n(EO)mCH2COOX, wherein R is an aliphatic alkyl group or an alkylphenyl group; (PO)n is polyoxypropylene; n is between 6 and 12; (EO)m is polyoxyethylene; m is between 1 and 4; X is an alkali metal, the fatty alcohol and the polyoxypropylene at the left terminal of the structural general formula are lipophilic groups; and polyoxyethylene and the carboxyl group at the right terminal of the structural general formula are hydrophilic groups. Polyoxypropylene is added to increase the lipophilicity of fatty alcohol carboxylate surfactants to adapt to the application of tertiary oil recovery, and a small amount of polyoxyethylene is added to adjust the hydrophilicity and simultaneously carboxylate fatty alcohol polyoxypropylene esters on condition that the current fatty alcohol raw material is unchanged.

Description

technical field [0001] The invention relates to the field of anionic surfactants, in particular to a fatty alcohol polyoxypropylene polyoxyethylene ether carboxylate and its preparation and application. Background technique [0002] Fatty alcohol ether carboxylate is a new type of anionic surfactant, which is modified by non-ionic surfactant. It has the characteristics of low surface tension, low toxicity and easy biodegradation. It is a multifunctional "green" surfactant. Surfactant". Due to its special properties, fatty alcohol ether carboxylates are widely used in cosmetics, detergents, biochemistry, pharmaceuticals, food processing, crude oil demulsification, thick oil viscosity reduction and other fields. At present, foreign countries have carried out systematic research on fatty alcohol ether carboxylate surfactants, and serialized products have been produced in batches, and the output has increased year by year. Although there are trial-marketing products in China, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/332C08G65/28C07C59/125C07C59/68C07C51/367C09K8/584
Inventor 朱友益侯庆锋王哲
Owner PETROCHINA CO LTD
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