75-93-4Relevant articles and documents
Methane oxidation to methyl bisulfate in oleum at ambient pressure in the presence of iodine as a catalyst
Michalkiewicz, Beata
, p. 266 - 268 (2011)
Methane oxidation to methyl bisulfate at ambient pressure in absorption reactor packed with glass balls in presence of iodine as a catalyst was investigated. The process was performed at temperature 120-130 °C, sulfur trioxide concentration in oleum 16-25 wt.%, catalyst concentration 0.008-0.024 mol dm-3, methane flow: 8.69 cm3 min-1. The optimal conditions for high ester concentration were defined.
Sulfation of polysaccharides using monomethyl sulfate
Takano, Ryo,Nagai, Tomomi,Wu, Xiaofen,Xu, Xin-Yan,Huy, Nguyen Tien,Kamei, Kaeko,Hara, Saburo
, p. 1185 - 1190 (2000)
The polysaccharides, curdlan, starch and dextran were sulfated when heated in DMSO with sodium methyl sulfate and a catalytic amount of H2SO4 or with pyridinium methyl sulfate. Use of diminished pressure and anhydrous CaSO4 as a desiccant improved the degree of sulfation and recovery. Under conditions using sodium methyl sulfate, H2SO4 and CaSO4 in vacuo, sulfation at 0-6 was predominant in the cases of curdlan and starch, while sulfation at O-2 and O-3 was preferential in the case of dextran.
High yield conversion of methane to methyl bisulfate catalyzed by iodine cations
Periana, Roy A.,Mirinov, Oleg,Taube, Douglas J.,Gamble, Scott
, p. 2376 - 2377 (2002)
Iodine in 2% oleum is an efficient catalyst for the selective, high yield oxidation of methane to methyl bisulfate.
SYNTHESIS OF ALKYLSULFURIC ACID FROM ALKYL NITRATES
Eremenko, L. T.,Oreshko, G. V.
, p. 212 (1982)
-
Methods for producing a methanol precursor, methanol, and a methyl ester from methane in high purities
-
Page/Page column 10, (2021/06/02)
A method for producing a methanol precursor, methyl trifluoroacetate, having high-purity includes the steps of (a) preparing methyl bisulfate by mixing a catalyst with an acid solution comprising a sulfur-containing acid to provide a first mixture and supplying methane gas to the first mixture to prepare the methyl bisulfate; and (b) preparing methyl trifluoroacetate (CF3CO2CH3) by adding trifluoroacetic acid (CF3CO2H) to the first mixture including the methyl bisulfate to provide a second mixture and distilling the second mixture under heating to prepare, separate and purify the methyl trifluoroacetate (CF3CO2CH3). Methanol may be produced by adding water to the methyl trifluoroacetate (CF3CO2CH3). A methyl ester represented by Formula 2 below may be produced by adding a carboxylic acid represented by Formula 1 below to the methyl trifluoroacetate (CF3CO2CH3): R1CO2H??(1),where R1 is selected from C1-C10 alkyl groups, R1CO2CH3??(2),where R1 is as defined in Formula 1.
BISPHENOL COMPOSITION CONTAINING AROMATIC ALCOHOL SULFONATE AND METHOD FOR PRODUCING SAME, POLYCARBONATE RESIN AND METHOD FOR PRODUCING SAME, AND BISPHENOL PRODUCTION METHOD
-
Paragraph 0253; 0255; 0257; 0258; 0264; 0265, (2020/07/07)
A bisphenol composition including a specific amount of aromatic alcohol sulfonate, and a simple method of producing it are provided. Also provided is a method of producing a polycarbonate resin in which, by using the bisphenol composition including a specific amount of aromatic alcohol sulfonate, melt polymerization reaction can be efficiently allowed to proceed to produce a polycarbonate resin having an excellent color tone. A bisphenol composition including an aromatic alcohol sulfonate at not less than 0.1 ppb by mass with respect to a bisphenol. A method of producing a bisphenol composition, including reacting a ketone or an aldehyde with an aromatic alcohol in the presence of sulfuric acid to produce a bisphenol composition. A method of producing a polycarbonate resin, including producing a polycarbonate resin using the bisphenol composition. A polycarbonate resin including a specific amount of aromatic alcohol sulfonate.
