Method for preparing gemini long-chain alkyl benzene sulfonate oil displacement agents

A technology of long-chain alkylbenzene sulfonate and oil-displacing agent is applied in the field of preparation of gemini long-chain alkylbenzene bissulfonate oil-displacing agent, and can solve the problems of complex process, low product selectivity, many side reactions, etc. problem, to achieve the effect of single structure, simple process and few reaction steps

Active Publication Date: 2010-03-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of gemini long-chain alkylbenzene sulfonate oil displacement agent utilizing benzyl chloride coupling and then sulfonation neutralization, which overcomes the previous process of preparing such surfactants by adding hydrophobic chains Complicated, many side reactions, low product selectivity, low product yield and other disadvantages, thereby simplifying the synthesis steps, which is conducive to industrial production of this long-chain alkylbenzene sulfonate oil displacement agent

Method used

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  • Method for preparing gemini long-chain alkyl benzene sulfonate oil displacement agents
  • Method for preparing gemini long-chain alkyl benzene sulfonate oil displacement agents
  • Method for preparing gemini long-chain alkyl benzene sulfonate oil displacement agents

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Add distilled water and N,N-dimethylformamide mixed solvent 100mL in a four-necked flask equipped with a reflux condenser, a thermometer and a dropping funnel, then add 0.05mol iron powder and 0.005mol copper powder in sequence, gradually Raise the temperature to 30°C for 10 minutes;

[0023] (2) Add 0.004mol cuprous chloride after ripening, stir until cuprous chloride dissolves completely;

[0024] (3) be warmed up to 70 DEG C again, then dropwise add 0.1mol dodecylbenzyl chloride, drip quickly;

[0025] (4) The temperature is controlled at 90°C for 20 hours, and the reaction is stopped;

[0026] (5) Filter the reaction solution while it is hot, dilute the filtrate with petroleum ether and place it in a separatory funnel, take the organic layer and remove the petroleum ether by rotary evaporation to obtain the intermediate product 1,-2-bis(4,4'-dodeca Alkyl-1-phenyl)ethane, its electrospray mass spectrum (ESI-MS) see figure 1 , in the mass spectrum, the mass-to-...

Embodiment 2

[0033] The same operation as in Example 1, only the dodecylbenzyl chloride in Example 1 is replaced by hexadecylbenzyl chloride, and 30% sodium hydroxide is changed into 30% ammonia water to obtain dihexadecane Crude ammonium diphenylethane disulfonate.

Embodiment 3

[0035] The same operation as in Example 1, except that the dodecylbenzyl chloride in Example 1 was replaced with tetradecylbenzyl chloride, can obtain the ditetradecyl disulfonate sodium diphenylethane crude product.

[0036]In the foregoing examples, the instruments and reagents used are: Infrared Analyzer, Magana-IR 560E.S.PV., Nicolet Company, USA; Chromatography and Mass Spectrometry Instrument, Japan SHIMADZUGCMS-QP2010; POWEREACH JJ2000A Spinning Drop Interfacial Tensiometer, Shanghai Zhongchen Co., Ltd.; dodecylbenzyl chloride, homemade; tetradecylbenzyl chloride, homemade; hexadecylbenzyl chloride, homemade; reduced iron powder, analytically pure, Beijing Yili Fine Chemicals Co., Ltd. Company; cuprous chloride, analytically pure, Beijing Chemical Reagent Company; N, N-dimethylformamide, analytically pure, Beijing Yili Fine Chemicals Co., Ltd.; copper powder, analytically pure, Beijing Chemical Reagent Company; smoke Sulfuric acid, analytically pure, Beijing Chemical Pl...

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Abstract

The invention relates to a method for preparing gemini long-chain alkyl benzene disulfonate oil displacement agents. The method comprises: adding 100 mL of distilled water and N,N-dimethylformamide mixed solvent in a volume ratio of 1:1, 0.05 mol of iron powder and 0.005 mol of copper powder and aging the materials for 10 minutes at 30 DEG C; adding 0.004 mol of cuprous chloride; raising the temperature to 70 DEG C and adding 0.1 mol of long-chain alkyl benzyl chloride dropwise; performing reaction for 20 hours at 90 DEG C; diluting filtrate with petroleum ether and rotationally steaming organic layers to remove the petroleum ether; diluting 0.04 mol of the obtained product with 40 mL of carbon tetrachloride, controlling the temperature below 5 DEG C and adding 10 mL of 50 percent oleum dropwise; and diluting reactant with 200 mL of water and 50 mL of carbon tetrachloride, removing aqueous solution in an upper layer and performing neutralization by use of sodium hydroxide solution or ammonia. The oil displacement agents with the concentration of 20 mg/kg can reduce interfacial tension to 5.8*10<-3>mN/m.

Description

Technical field: [0001] The invention relates to a preparation method of a gemini long-chain alkylbenzene disulfonate oil displacement agent. Background technique: [0002] At present, my country's main oil fields have entered the late stage of secondary oil recovery, which is characterized by high water cut, accelerated decline in crude oil production, and reduced economic benefits. The use of chemical compound flooding for tertiary oil recovery can generally increase the oil recovery rate by about 20%. Anionic surfactants are mainly used in oilfield tertiary recovery, mainly including alkylbenzene sulfonate, petroleum sulfonate, petroleum carboxylate, etc. In specific applications, the problem of petroleum sulfonate is that it is easy to form precipitation with divalent and trivalent cations, and it is easy to be adsorbed by the surface of clay. The composition of raw materials is complex, and the stability of different batches of products is poor. problems, etc.; carbox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C303/06C07C309/31
Inventor 王雨郑晓宇张庭辉陈权生李东文张群志
Owner PETROCHINA CO LTD
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