1073-05-8Relevant articles and documents
Concentration of hydrophobic organic compounds and extraction of protein using alkylammoniosulfate zwitterionic surfactant mediated phase separations (cloud point extractions)
Saitoh, Tohru,Hinze, Willie L.
, p. 2520 - 2525 (1991)
The zwitterionic surfactants 3-[nonyl- (or decyl-) dimethylammonio]propyl sulfate, (C9-APSO4 or C10-APSO4) were synthesized using Nilsson's procedure, and their phase separation behavior under different experimental conditions was evaluated. The results indicate that such zwitterionic surfactants can be utilized for the extraction/preconcentration of hydrophobic species in a manner akin to that previously reported for nonionic surfactants. This was demonstrated for several practical applications including the extraction/preconcentration of some steroidal hormones and vitamin E prior to high-performance liquid chromatography analysis. The zwitterionic surfactant mediated phase separation was also applied to the extraction of the hydrophobic membrane protein, bacterio-rhodopsin, from the hydrophilic cytochrome c protein, both originally present In an aqueous phase. The concentration factors for this aqueous two-phase extraction technique using C10-APSO4 ranged from 26 to 35 with recoveries In the range 88 to > 96%. Some comparative studies Indicate that the use of zwittterionic surfactants In lieu of nonionic surfactants (e.g. polyoxyethylene(7.5) nonyl phenyl ether PONPE-7.5) In such an extraction method offers some significant advantages such as purer, homogeneous surfactant preparation, minimum background absorbance at UV detection wavelengths, the two-phase region occurring at lower temperatures, and greater extraction efficiencies/concentration factors among others.
METHOD OF OXIDIZING USING CALCIUM HYPOCHLORIDE AND MANUFACTURING FOR SULFONE OR SULFIDE
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Paragraph 0111-0114; 0116; 0117; 0131, (2020/06/11)
Is a process for preparing a sulphone or sulfate compound using calcium hypochlorite, and, wherein the method comprises introducing, sulfoxide or sulfite compound in an organic solvent and adding calcium hypochlorite in a solid state to an organic solvent in which the compound is introduced to oxidize the compound. (by machine translation)
Preparation method of cyclic sulfate
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Paragraph 0086; 0087; 0088; 0089; 0090, (2018/03/28)
The invention relates to the field of organic synthesis, in particular to a preparation method of cyclic sulfate. The structural formula of cyclic sulfate is shown as formula I. The preparation methodof cyclic sulfate comprises the following step: cyclic sulfate in the formula I is prepared from a compound in formula II and sulfuryl fluoride by reacting in the presence of an acid binding agent and a catalyst. The preparation method of cyclic sulfate adopts short reaction step, cyclic sulfate can be prepared with the one-step reaction, cost of raw and auxiliary materials is low, and expensiveraw materials and oxidizing agent are not used.