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A kind of selenium-containing nonionic interfacial emulsifier and its preparation method and application

A non-ionic, emulsifying agent technology, applied in chemical instruments and methods, organic chemistry, transportation and packaging, etc., can solve the problem that it is difficult to eliminate the emulsifying properties of non-ionic interfacial emulsifiers, achieve superior emulsifying performance, simple preparation method, and easy synthesis The effect of mild conditions

Active Publication Date: 2019-11-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After normal use, non-ionic interfacial emulsifiers usually exist in wastewater in the form of emulsification, and conventional methods are difficult to eliminate the emulsifying properties of non-ionic interfacial emulsifiers

Method used

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  • A kind of selenium-containing nonionic interfacial emulsifier and its preparation method and application
  • A kind of selenium-containing nonionic interfacial emulsifier and its preparation method and application
  • A kind of selenium-containing nonionic interfacial emulsifier and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, C 6 h 5 CH 2 Se(CH 2 ) 2 Se(CH 2 ) 2 The preparation method of OH is as follows:

[0037] Take 4.0 g of dibenzyldiselenide (0.012 mol) and dissolve it in 35 mL of tetrahydrofuran under the protection of nitrogen, add 2.2 g of sodium borohydride (0.048 mol) in ice water solution dropwise under the condition of ice-water bath, and react under ice-water bath for 30 Minutes later, add dropwise bromodichloroethane (or bromotrichloropropane, or bromotetrachloropropane) dissolved in tetrahydrofuran in advance in the above-mentioned system according to chlorobromoalkane: dibenzyl diselenide molar ratio 1:2.1 butane), after 0.5 hour reaction in an ice-water bath, extracted with dichloromethane to obtain the organic phase, dehydrated and evaporated the solvent, the silica gel column was eluted with a mixed solvent of 1:10 volume ratio of ethyl acetate and sherwood oil to obtain C 6 h 5 CH 2 Se(CH 2 ) 2 Cl yellow liquid, C 6 h 5 CH 2 Se(CH 2 ) 2 Cl...

Embodiment 2

[0045] In this example, C 6 h 5 CH 2 Se(CH 2 ) 3 Se(CH 2 ) 3 The preparation method of OH is as follows:

[0046] Take 4.0 g of dibenzyldiselenide (0.012 mol) and dissolve it in 35 mL of tetrahydrofuran under the protection of nitrogen, add 2.2 g of sodium borohydride (0.048 mol) in ice water solution dropwise under the condition of ice-water bath, and react under ice-water bath for 30 Minutes later, add dropwise bromodichloroethane (or bromotrichloropropane, or bromotetrachloropropane) dissolved in tetrahydrofuran in advance in the above-mentioned system according to chlorobromoalkane: dibenzyl diselenide molar ratio 1:2.1 butane), after 0.5 hour reaction in an ice-water bath, extracted with dichloromethane to obtain the organic phase, dehydrated and evaporated the solvent, the silica gel column was eluted with a mixed solvent of 1:10 volume ratio of ethyl acetate and sherwood oil to obtain C 6 h 5 CH 2 Se(CH 2 ) 3 Cl yellow liquid, C 6 h 5 CH 2 Se(CH 2 ) 3 Th...

Embodiment 3

[0055] This embodiment C 6 h 5 CH 2 Se(CH 2 ) 4 Se(CH 2 ) 4 The preparation method of OH is as follows:

[0056] Take 4.0 g of dibenzyldiselenide (0.012 mol) and dissolve it in 35 mL of tetrahydrofuran under the protection of nitrogen, add 2.2 g of sodium borohydride (0.048 mol) in ice water solution dropwise under the condition of ice-water bath, and react under ice-water bath for 30 Minutes later, add dropwise bromodichloroethane (or bromotrichloropropane, or bromotetrachloropropane) dissolved in tetrahydrofuran in advance in the above-mentioned system according to chlorobromoalkane: dibenzyl diselenide molar ratio 1:2.1 butane), after 0.5 hour reaction in an ice-water bath, extracted with dichloromethane to obtain the organic phase, dehydrated and evaporated the solvent, the silica gel column was eluted with a mixed solvent of 1:10 volume ratio of ethyl acetate and sherwood oil to obtain C 6 h 5 CH 2 Se(CH 2 ) 4 Cl yellow liquid, C 6 h 5 CH 2 Se(CH 2 ) 4 Cl ...

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Abstract

The invention discloses a selenium-containing nonionic interface emulsifier, a preparation method and application thereof, and belongs to the technical field of fine chemicals. The selenium-containing nonionic interfacial emulsifier is fatty acid benzyl selenium sulfoxide alkyl ester, and its chemical formula is C 6 h 5 CH 2 Se(O)(CH 2 ) m Se(O)(CH 2 ) m OC(O)(CH 2 ) n CH 3 , wherein m is an integer from 2 to 4, and n is an integer from 11 to 17. The preparation method of the selenium-containing nonionic interfacial emulsifier obtained in the present invention is simple, the synthesis condition is mild, there is no special equipment requirement, the energy consumption is low, and the raw material is easy to obtain, and the nonionic surfactant obtained by the method does not contain 1,4-dioxin ring; the hydrophilic group of the selenium-containing nonionic interfacial emulsifier is a selenium sulfoxide group that does not contain hydroxyl, polyoxyethylene and sugar groups; the selenium-containing nonionic interfacial emulsifier of the present invention does not possess obvious gas / liquid Active but with pronounced liquid / liquid interfacial activity.

Description

technical field [0001] The invention relates to a manufacturing method and application of a selenium-containing nonionic interface emulsifier, belonging to the technical field of fine chemicals industry. Background technique [0002] Nonionic interfacial emulsifiers are a large class of emulsifiers commonly used in industrial and agricultural production and daily chemical industry. Their molecular structure is characterized by the fact that their hydrophilic groups are polyhydroxyl groups, polyoxyethylene ether groups and sugar groups. Among them, the nonionic interfacial emulsifiers whose polyoxyethylene ether group is a hydrophilic group all contain 1,4-dioxane. After normal use, nonionic interfacial emulsifiers usually exist in wastewater in the form of emulsification, and it is difficult to eliminate the emulsifying properties of nonionic interfacial emulsifiers by conventional methods. Contents of the invention [0003] Aiming at the problems existing in the prior ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C391/00B01F17/00C09K23/00
CPCC07C391/00C09K23/00
Inventor 刘雪锋吕湘亮
Owner JIANGNAN UNIV
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