- Pressure Effects on the Reaction of Hydroxide Ion with Sodium 2-Bromoethanesulfonate
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Kinetic effect of pressure on the reaction of hydroxide ion with 2-bromoethanesulfonate was studied.The reaction was moderately accelerated by presure and the activation volumes suggest that the presence of the negative charge on the sulfonato group does not produce any measurable solvation increase during activation.
- Asano, Tsutomu,Okada, Toshio
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- Synthetic method of biological buffer agent--morpholineethanesulfonic acid
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The invention belongs to the field of organic synthesis and specifically relates to a synthetic method of a biological buffer agent--morpholineethanesulfonic acid. In the method, self-made SVS can beused to avoid harmful impurities from being mixed in the final product. In the method, SVS and morpholine are adopted to synthesize MES-Na. The process is simple and environmentally-friendly, and no foreign matter is generated. According to the method, acidic ion exchange resin is adopted for acidification to remove impurity cation, thus achieving the purification purpose. General decoloration, crystallization, centrifugation and drying processes are used in the method, and the production is easy to implement. In the production process, oxidative deterioration of the materials is avoided through temperature control and nitrogen protection, thereby producing the high-quality biological buffer agent MES. The prepared product is easy to separate, and the method is convenient to operate and has high practicality.
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Paragraph 0029-0030
(2019/07/01)
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- Process for the production of taurine from ethanol
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The present invention discloses a process for the preparation of taurine from ethionic acid and ethanol by way of ethanol-derived ethionic acid by the ammonolysis of ethionic acid and by the ammonolysis of sodium isethionate and sodium vinyl sulfonate, key intermediates prepared from ethionic acid.
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Paragraph 0040-0041
(2015/08/04)
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- Process for the production of taurine from ethanol
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The present invention discloses a process for the preparation of taurine from ethionic acid and ethanol by way of ethanol-derived ethionic acid by the ammonolysis of ethionic acid and by the ammonolysis of sodium isethionate and sodium vinyl sulfonate, key intermediates prepared from ethionic acid.
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Page/Page column 6
(2015/09/28)
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- PROCESS FOR THE PRODUCTION OF METAL SALTS OF RADICAL-POLYMERIZABLE COMPOUNDS
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A method for manufacturing metal salts of radical-polymerizable compounds with reduced amount of water in the below-mentioned component (A) by subjecting an aqueous solution of an alkali-metal salt, alkali earth-metal salt, or a zinc salt of the radical-polymerizable compound (A) to heating under a reduced pressure in the presence of an aqueous polymerization inhibitor for removal of aqueous components by distillation from aforementioned compounds (A).
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Page column 6
(2008/06/13)
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- Organic sulfur mechanisms. 24. Preparation and reaction of 2-hydroxyethanesulfonyl chloride, the first hydroxyalkanesulfonyl chloride
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2-Hydroxyethanesulfonyl chloride (1a) is readily made by reaction of an aqeous solution of 2-mercaptoethanol (4a) with chlorine.This is the first clearly proved preparation of a compound which is both an alcohol and a sulfonyl chloride.Reactions of 1a with water and alcohols evidently proceed largely by intramolecular cyclization to the transient β-sultone (2a), which then undergoes nucleophilic ring opening to form the products.In the presence of tertiary amines a minor but significant part of the reaction is shown by deuterium labelling to proceed via hydroxymethylsulfene (14), the principal reaction of which is simply to add the alcohol or water; only a small part, if any, of the sulfene (14) loses the hydroxyl group to give the ethenesulfonate derivatives (13 or 22).Aqueous chlorination of 3-mercapto-1-propanol gave 3-chloro-1-propanesulfonyl chloride (5a) and 1,3-propane sultone (2b) with no sign of any 3-hydroxy-1-propanesulfonyl chloride (1b).A mechanism for the aqueous chlorination process invoking a cyclic chlorooxasulfoxonium ion (27) is discussed.
- King, James Frederick,Hillhouse, John Henry
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p. 1583 - 1593
(2007/10/02)
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