Unlock instant, AI-driven research and patent intelligence for your innovation.

2-acrylamide-2-methylpropanesulfonic acid (AMPS) crude product and refining method thereof

A technology based on methyl propanesulfonic acid and acrylamide, which can be used in chemical instruments and methods, preparation of organic compounds, drilling compositions, etc., and can solve problems such as low molecular weight

Inactive Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new 2-acrylamido- The refining method of 2-methylpropanesulfonic acid crude product

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example is used to illustrate the refining method of the crude product of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0043] The preparation of 2-acrylamido-2-methylpropanesulfonic acid crude product: in the four-necked flask that is provided with temperature control device, agitator, thermometer and gas feeding device, add 330g acrylonitrile, acrylonitrile is cooled to After -10°C, add 40g of sulfuric acid with a concentration of 100% by weight, maintain the temperature at -10°C and continue to stir for 1 hour during and after the addition process; Add 21 g of sulfuric acid with a concentration of 98% by weight and continue to feed isobutene. After the total amount of isobutene added to the reaction system reaches 35 g, close the isobutene valve and finish the reaction after 1 hour of heat preservation. The reaction solution was vacuum filtered to obtain a filter cake and a filtrate. The filter cake was vacuum-dried at a tempera...

Embodiment 2

[0047] This example is used to illustrate the refining method of the crude product of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0048] The preparation of 2-acrylamido-2-methylpropanesulfonic acid crude product: in the four-necked flask that is provided with temperature control device, agitator, thermometer and gas feeding device, add 330g acrylonitrile, acrylonitrile is cooled to Add concentration after -10 ℃ and be the oleum 40g of 103% by weight, maintain temperature is-10 ℃ and continue to stir for 1 hour in the process of adding and after finishing; Then be warming up to 40 ℃, pass into 15g isobutylene to react, then to reaction Add 21 g of oleum with a concentration of 102% by weight into the system and continue to feed isobutene. After the total amount of isobutene added to the reaction system reaches 35 g, close the isobutene valve, and finish the reaction after 1 hour of heat preservation. The reaction solution was vacuum filtered t...

Embodiment 3

[0052] This example is used to illustrate the refining method of the crude product of 2-acrylamido-2-methylpropanesulfonic acid provided by the present invention.

[0053] The preparation of 2-acrylamido-2-methylpropanesulfonic acid crude product: in the four-necked flask that is provided with temperature control device, agitator, thermometer and gas feeding device, add 330g acrylonitrile, acrylonitrile is cooled to After -10°C, adding concentration is 102% by weight of fuming sulfuric acid 20g, during the feeding process and after finishing, maintaining temperature is -10°C and continuing to stir for 1 hour; then warming up to 40°C, feeding 10g isobutylene to react, and then to the reaction Add 41 g of sulfuric acid with a concentration of 98% by weight to the system and continue to feed isobutene. After the total amount of isobutene added to the reaction system reaches 35 g, close the isobutene valve, and finish the reaction after 1 hour of heat preservation. The reaction so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a refining method of a 2-acrylamide-2-methylpropanesulfonic acid (AMPS) crude product. The refining method is characterized by comprising the following steps of: (1) dissolving the AMPS crude product in absolute methanol; (2) contacting the solution obtained in the step (1) with silica gel and then filtering the solution, wherein the mass ratio of the silica gel to the AMPS crude product is 1:(5-20) and the contact time is 0.25-1 hour; and (3) cooling and crystallizing the solution obtained after filtration in the step (2) and carrying out solid-liquid separation. The invention also provides AMPS refined by the method. The method has the advantages that the molecular weight of the polymer formed by polymerizing the refined AMPS is greatly increased and the requirement of high temperature and salt resistance of the polymer for tertiary oil recovery can be met.

Description

technical field [0001] The invention relates to a method for refining a crude product of 2-acrylamido-2-methylpropanesulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid obtained by the refining method. Background technique [0002] 2-Acrylamide-2-methylpropanesulfonic acid (2-Acrylamide-2-methylpropanesulfonic acid, hereinafter referred to as AMPS) is a multifunctional water-soluble anionic monomer with carbon-carbon double bonds, carbonyl and sulfonic acid in its molecular structure functional group. The sulfonic acid group makes the molecule have good water solubility, good salt resistance, and good stability, the carbonyl group makes the molecule have good adsorption and complexation, and the carbon-carbon double bond can make the molecule itself or with other Molecular homopolymerization and copolymerization form high polymers. Water-soluble polymers of AMPS have important uses in the petroleum industry, and can be used as flocculants and filter depressants in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07C309/15C07C303/44C09K8/588
Inventor 穆晓蕾齐兰芝黄凤兴贾春革李斗星赵冬
Owner CHINA PETROLEUM & CHEM CORP