Patent ID: 9745260
Date: 2017-08-29
CPC Classifications: C07C

Claim:
1. A method for purifying acrylamide alkyl sulfonic acid, the method comprising steps of: (a) making a material A evenly mixed and contacted with a solvent C, the material A comprising at least one acrylamide alkyl sulfonic acid compound represented by general formula: in which R (b) keeping the material A even mixed and contacted with the solvent C for at least 1 hour, the solvent C selected from the group consisting of water, acid containing 1-8 carbons, amide containing 1-8 carbons, alcohol containing 1-8 carbons mixed in water, ketone containing 1-8 carbons, ether containing 1-8 carbons, ester containing 1-8 carbons, alkane containing 1-8 carbons, halogenated hydrocarbon containing 1-8 carbons, and combinations thereof; c) performing a solid-liquid separation to obtain a solid, the solid a purified product B, in which the product B is purified material A; and wherein the method does not include steps for dissolving the material A by increasing temperature, re-separating out by decreasing temperature, or removing the solvent.