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

A technology based on methylpropanesulfonic acid and acrylamide, which is applied in chemical instruments and methods, preparation of organic compounds, drilling compositions, etc., can solve the problem of low molecular weight, and achieve the effect of high temperature resistance and salt resistance

Inactive Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new 2-acrylamide in order to overcome the low molecular weight defect of the polypolymer formed after the polymerization of purified 2-acrylamido-2-methylpropanesulfonic acid in the prior art Method for refining base-2-methylpropanesulfonic acid crude product and 2-acrylamido-2-methylpropanesulfonic acid refined by the method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 5 liters of absolute ethanol in 10 liters of glass reactors, add 2 kilograms of 2-acrylamido-2-methylpropanesulfonic acid crude product (product purity 95% by weight) under stirring, control temperature is 40 ℃, stir 2 After 1 hour, the solid was isolated by filtration, and the obtained solid was dried in vacuo to obtain 1980 g of a dried solid. After this solid is dissolved in the acetic acid aqueous solution of 88% in the acetic acid concentration of 7 liters, then add 990g gac powder (particle diameter is 80 microns, and specific surface area is 400 square meters / gram, and the pore volume of gac micropore is 0.3 milliliters / g) gram, commercially available in Beijing Chemical Reagent Company), filtered after stirring at 30°C for 10 minutes to obtain the filtrate, then crystallized the filtrate at 5°C for 4 hours, filtered the crystallized solution, and vacuum-dried at 80°C for 10 After 1 hour, 1.50 kg of 2-acrylamido-2-methylpropanesulfonic acid product was obtain...

Embodiment 2

[0033] Add 6 liters of dehydrated ethanol in 10 liters of glass reactors, add 2 kilograms of 2-acrylamido-2-methylpropanesulfonic acid crude product (product purity 96% by weight) under stirring, control temperature is 20 ℃, stir 2 After 1 hour, the solid was isolated by filtration, and the obtained solid was dried in vacuo to obtain 1980 g of a dried solid. This solid is dissolved in 7 liters of acetic acid concentration after being in the aqueous acetic acid solution of 88% by weight, then add 300g gac powder (particle diameter is 50 microns, and specific surface area is 800 square meters / gram, and the pore volume of gac micropore is 0.5 ml / g, commercially available from Beijing Chemical Reagent Company), filtered after stirring at 35°C for 60 minutes to obtain the filtrate, then crystallized the filtrate at 5°C for 4 hours, filtered the crystallized solution, and vacuum dried at 90°C After 10 hours, 1.51 kg of 2-acrylamido-2-methylpropanesulfonic acid product was obtained,...

Embodiment 3

[0035] Add 5 liters of absolute ethanol in a 10-liter glass reactor, add 2 kg of commercially available 2-acrylamido-2-methylpropanesulfonic acid crude product (product purity 95% by weight) under stirring, and control the temperature at 40°C. After stirring for 1 hour, the solid was separated by filtration, and the obtained solid was vacuum-dried to obtain 1970 g of a dried solid. This solid is dissolved in the acetic acid aqueous solution that 7.5 liters of acetic acid concentrations are 92% by weight, then add 197g gac powder (particle diameter is 35 microns, and specific surface area is 1000 square meters / gram, and the pore volume of gac micropore is 0.6 milliliters / g, commercially available from Beijing Chemical Reagent Company), filtered after stirring at 50°C for 90 minutes to obtain the filtrate, then recrystallized the filtrate at 5°C for 6 hours, filtered the crystallized solution, and vacuumed at 80°C After drying for 8 hours, 1.60 kg of 2-acrylamido-2-methylpropan...

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PUM

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Abstract

The invention provides a refining method of a 2-acrylamide-2-methylpropanesulfonic acid (AMPS) crude product and AMPS prepared by the method. The method comprises the steps of contacting the AMPS crude product with alcohol with carbon number being 1-4 at 0-45 DEG C and then carrying out solid-liquid separation to obtain solid, dissolving the obtained solid in an acetic acid water solution and then contacting the acetic acid water solution in which the solid is dissolved with activated carbon and crystallizing the solution obtained after contact. According to AMPS prepared by the refining method, the molecular weight of the multipolymer formed by polymerizing the refined AMPS can be greatly increased.

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 refined by the method. Background technique [0002] 2-Acrylamide-2-methylpropanesulfonic acid (2-Acrylamide-2-methylpropanesulfonic acid, AMPS) is a multifunctional water-soluble anionic monomer, due to its molecular structure has a carbon-carbon double bond and is not sensitive to salt sulfonic acid base, so it is easy to polymerize, and its homopolymer and copolymer have many special properties, which have broad application prospects and can be widely used in oilfield chemistry, water treatment agents, chemical fibers, plastics, printing and dyeing, coatings, surfactants, antistatic Chemicals, ceramics, photography, detergent additives, ion exchange resins, gas separation membranes, electronics and other fields. [0003] In the prior art, the 2-acrylamido-2-methylpropanesulfonic acid product is ma...

Claims

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Application Information

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IPC IPC(8): C07C309/15C07C303/44C09K8/588
Inventor 齐兰芝黄凤兴穆晓蕾贾春革李斗星赵冬
Owner CHINA PETROLEUM & CHEM CORP
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