Acid residue treatment method and binary oil displacement surfactant

A technology of surfactants and treatment methods, applied in chemical instruments and methods, sulfonic acid preparation, drilling compositions, etc., can solve problems such as the inability to effectively utilize acid slag, and achieve harmless reuse of waste, interface Better tension performance and higher oil displacement efficiency

Inactive Publication Date: 2021-11-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a treatment method for acid slag and a binary flooding surfactant to solve the problem that acid slag cannot be effectively utilized in the prior art

Method used

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  • Acid residue treatment method and binary oil displacement surfactant
  • Acid residue treatment method and binary oil displacement surfactant
  • Acid residue treatment method and binary oil displacement surfactant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The acid residue in Xinjiang Oilfield mainly contains unsulfonated oil (30wt%), sulfonic acid (30wt%) and sulfuric acid (40wt%). The aromatic hydrocarbons in the raw oil used in the production of naphthenic petroleum sulfonic acid are highly active and prone to polysulfonate According to the principle of "like dissolves like", a large amount of polysulfonic acid is extracted by sulfuric acid to form a viscous acid slag with a relatively high density similar to solid.

[0050] (1) Weigh 500g of Xinjiang oilfield acid residue, put it in a beaker, heat it, and monitor the temperature of the acid residue in the beaker at all times.

[0051] (2) When the temperature of the acid slag in the step (1) rises to 50° C., start stirring at a stirring speed of 150 r / min, while continuing to heat up to 80° C., then keep stirring.

[0052] (3) Slowly add lauryl phenol (structure is C) in above-mentioned beaker 12 h 25 C 6 h 4 OH, Cas number is 210555-94-5) 300g, the dropping speed...

Embodiment 2

[0058] The difference with embodiment 1 only lies in main component and content difference. The acid residue mainly contains unsulfonated oil (28wt%), sulfonic acid (31wt%) and sulfuric acid (41wt%).

Embodiment 3

[0060] The difference with embodiment 1 only lies in main component and content difference. The acid residue mainly contains unsulfonated oil (32wt%), sulfonic acid (33wt%) and sulfuric acid (35wt%).

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Abstract

The invention provides an acid residue treatment method and a binary oil displacement surfactant. The treatment method comprises the following steps: carrying out a sulfonation reaction on acid residue and long-chain alkylphenol to obtain sulfonic-substituted long-chain alkylphenol, wherein the long-chain alkyl in the long-chain alkylphenol refers to alkyl with the C atom number of 10-22; and carrying out a neutralization reaction on the sulfonic-substituted long-chain alkylphenol to obtain the benzene sulfonate. According to the treatment method, innocent treatment is conducted on the acid residue, harm of the acid residue to the environment is reduced, benzene sulfonate with excellent performance is obtained, and in subsequent tertiary oil recovery, the benzene sulfonate and naphthenic base petroleum sulfonate are compounded to form a binary oil displacement surfactant with better interfacial tension performance and higher oil displacement efficiency; and the binary oil-displacing agent with excellent performance is obtained by utilizing the acid residue, so that harmless recycling of wastes is realized, and outdated incineration and burying methods which pollute the environment are eliminated.

Description

technical field [0001] The invention relates to the field of petroleum technology, in particular to a treatment method for acid residue and a binary oil flooding surfactant. Background technique [0002] Acid slag is the acid waste residue (referred to as acid slag) produced during the production process of naphthene sulfonate or sulfuric acid refining of petroleum products. Odor, corrosive and non-degradable, mainly composed of unsulfonated oil, highly hydrophilic monosulfonic acid or disulfonic acid and polysulfonic acid and other active substances, affecting the economic benefits of naphthenic petroleum sulfonate , secondly, part of the unreacted waste acid is wrapped in the acid slag at the same time. After being directly neutralized by sodium hydroxide or ammonia water, the inorganic salt in the product will seriously exceed the standard, resulting in a decrease in the performance of the naphthenic petroleum sulfonate product, and the oil displacement efficiency low. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/06C07C309/42C09K8/584
CPCC07C303/06C09K8/584C07C309/42
Inventor 聂小斌关丹栾和鑫徐崇军阙庭丽李织宏代学成唐文洁
Owner PETROCHINA CO LTD
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