Title:
アクリルアミド－２－メチル－２－プロパンスルホン酸の精製方法
Document Type and Number:
Japanese Patent JP7420776
Kind Code:
B2
Abstract:
The invention relates to a method for the purification of acrylamido-2-methyl-2-propanesulphonic acid comprising the following successive steps:1) preparation of a suspension of acrylamido-2-methyl-2-propanesulphonic acid crystals by distillation of an aqueous solution of acrylamido-2-methyl-2-propanesulphonic acid in order to obtain a suspension of acrylamido-2-methyl-2-propanesulphonic acid crystals,2) isolation of the acrylamido-2-methyl-2-propanesulphonic acid crystals generally by solid/liquid separation from said suspension in order to isolate said acrylamido-2-methyl-2-propanesulphonic acid crystals,characterised in that the distillation step is carried out continuously and at a pressure below atmospheric pressure.The invention also relates to a polymer obtained from acrylamido-2-methyl-2-propanesulphonic acid crystals or its salts, obtained according to such a method, and to the use of said polymer in oil and gas recovery, in water treatment, in sludge treatment, in manufacturing paper, in construction, in mining, in cosmetic formulation, in detergent formulation, in textile making, or in agriculture.
Inventors:
Cedric Favero
Joan Keefer
Benoit Lugra
Rafael Dudan
Joan Keefer
Benoit Lugra
Rafael Dudan
Application Number:
JP2021152252A
Publication Date:
January 23, 2024
Filing Date:
September 17, 2021
Export Citation:
Assignee:
SNF Group
International Classes:
C07C309/15; C07C303/44; C08F20/58
Domestic Patent References:
| JP2004277363A | ||||
| JP54106427A | ||||
| JP2020511510A |
Attorney, Agent or Firm:
Yasuhiko Murayama
Shinya Mihiro
Tatsuhiko Abe
Shinya Mihiro
Tatsuhiko Abe