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Branched chain ether type anionic surfactant and preparation method thereof

A surfactant and anion technology, applied in the field of branched ether sulfonate anionic surfactant and its preparation, can solve the problems of complicated operation steps, harsh reaction conditions, complex synthesis process and the like

Active Publication Date: 2013-08-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the synthesis process of the existing branched ether type sulfonate surfactant is complicated, the reaction conditions are harsh, and it involves high-pressure oxyethylation of ethylene oxide, and the operation steps are cumbersome.

Method used

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  • Branched chain ether type anionic surfactant and preparation method thereof
  • Branched chain ether type anionic surfactant and preparation method thereof
  • Branched chain ether type anionic surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Synthetic novel surfactant (1) has the following structure:

[0078]

[0079] Step 1: adding polyoxyethylene lauryl alcohol (3) ether to epichlorohydrin to obtain chloroglycerin ether. The reaction temperature is 80°C; the reaction time is 2 hours. with SnCl 4 For the addition reaction catalyst; in molar ratio,

[0080] Lauryl alcohol polyoxyethylene (3) ether: epichlorohydrin: SnCl 4 =1:1:0.006.

[0081] Step 2: Intramolecular cyclization reaction of the obtained chloroglyceryl ether under the action of alkali to obtain glycidyl ether. Reaction temperature is 85 ℃; Reaction time is 4 hours; Molar ratio,

[0082] Chloroglycerin ether: alkali = 1: 1.6;

[0083] The base is NaOH, used as a 30% aqueous solution.

[0084] Step 3: adding the obtained glycidyl ether to isooctyl alcohol polyoxyethylene (3) ether to obtain a two-tailed alcohol intermediate with the structural formula (VI). The reaction temperature was 80°C, and the reaction time was 2 hours.

[0085...

Embodiment 2～9

[0098] According to the method of Example 1, different raw materials 1 and 2 were selected as starting materials, and a series of novel surfactants (2)-(9) having the general formula (I) were synthesized. The structures of the synthesized compounds were confirmed by negative ion ESI-MS. Raw material 1, raw material 2 and R in the product structure formula 1 , R 2 , R 3 , m, n, M are shown in Table 1.

[0099] Table 1 branched chain ether type sulfonate anionic surfactant of the present invention

[0100]

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Abstract

The invention relates to a branched chain ether type anionic surfactant and a preparation method thereof. The surfactant has two tail chains, and the tail chains contain nonionic hydrophilic groups. The surfactant has excellent salt tolerance, and can obviously reduce the oil-water interface tension in high-concentration saline. The surfactant can be used for tertiary oil recovery of a high mineralization oil reservoir to improve the recovery rate of crude oil. The surfactant can be synthesized by using relatively cheap raw materials such as epoxy chloropropane, allyl chloride, sodium bisulfite and the like.

Description

technical field [0001] The invention relates to the field of tertiary oil recovery, in particular to a branched-chain ether type sulfonate anionic surfactant and a preparation method thereof. Background technique [0002] In the process of oil field exploitation, only a part of crude oil can be obtained by using the natural pressure of the oil reservoir in primary oil recovery. In order to improve the recovery rate of oil fields, people have invented many kinds of auxiliary oil recovery technologies, the most commonly used is the water flooding secondary oil recovery method of injecting water into the oil reservoir. After water flooding, the crude oil has not been fully recovered. How to maximize the extraction of the remaining crude oil underground has become an important task in the petroleum industry. Therefore, there has been an tertiary oil recovery technology that adds chemical additives to water to further enhance oil recovery. [0003] Chemical flooding is the mai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/02B01F17/42C09K8/584C09K23/02C09K23/42
Inventor 胡建军于芳王建宇吴江勇
Owner CHINA PETROLEUM & CHEM CORP
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