摘要:
There is provided a method for preparing a sulfone or sulfoxide compound, characterized in that a sulfide compound is allowed to react with hydrogen peroxide in the presence of a metal oxide catalyst formed by the reaction of hydrogen peroxide with at least one metal or metal compound selected from tungsten metal; molybdenum metal; a tungsten compound comprising tungsten and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen; and a molybdenum compound comprising molybdenum and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen.
摘要:
Polymers grafted with a compount of formula I, formula (I) wherein the general symbols are as defined in claim 1, have outstanding stability against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation.
摘要翻译:用式I化合物(I)接枝的聚合物,其中通式如权利要求1所定义,具有优异的抗氧化,热,动态,光诱导和/或臭氧诱导的降解的稳定性, 公式描述=“在线公式”end =“lead”?> [R <1> SUB> m sub> SUB> R-SO p SUB> -R 2 SUB>。 (I)<?in-line-formula description =“In-line Formulas”end =“tail”?>
摘要:
A catalyst includes a cyclic imide compound having an N-substituted cyclic imide skeleton represented by following Formula (I): wherein X is an oxygen atom or a hydroxyl group, and having a solubility parameter of less than or equal to 26 [(MPa) 1/2 ] as determined by Fedors method. The catalyst may further-comprise a metallic compound. By allowing (A) a compound capable of forming a radical to react with (B) a radical scavenging compound in the presence of the catalyst, an addition or substitution reaction product between the compound (A) and the compound (B) or a derivative thereof can be obtained.
摘要:
The present invention provides a method for preparing ester or thioester that can conduct catalytic esterification reaction with an equimolar amount of carboxylic acid and alcohol, or catalytic thioesterification reaction with carboxylic acid and an equimolar amount or small amount of thiol, and can be expected as an industrial method that needs an enormous amount of synthesis in the light of green chemistry. By using hafnium chloride (IV), especially tetravalent hafnium compounds represented by hafnium chloride (IV) · (THF) 2 or hafnium (IV)t-butoxide as a (poly) condensation catalyst, direct condensation reaction is conducted from carboxylic acid and an equimolar amount of alcohol or a little smaller amount of thiol , in the nonpolar solvent such as toluene and the like, in a deoxidization atmosphere and under heating reflux, and the reaction synthesizes ester monomer or thioester monomer, polyester or polythioester. When heating reflux is conducted by using a nonpolar solvent, it is preferable to remove azeotropic water from the reaction system.
摘要:
There is provided a method for preparing a sulfone or sulfoxide compound, characterized in that a sulfide compound is allowed to react with hydrogen peroxide in the presence of a metal oxide catalyst formed by the reaction of hydrogen peroxide with at least one metal or metal compound selected from tungsten metal; molybdenum metal; a tungsten compound comprising tungsten and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen; and a molybdenum compound comprising molybdenum and a Group IIIb, IVb, Vb, or VIb element exclusive of oxygen.
摘要:
The invention concerns a method for the acylation or sulphonation of an aromatic compound. More particularly, the invention concerns a method for the acylation or sulphonation of an activated or deactivated aromatic compound and is useful for preparing aromatic ketones or sulphones. The method consists in reacting at least an aromatic compound with an acylation or sulphonation agent, in the presence of a Friedel-Crafts catalyst and is characterised in that the acylation or sulphonation reaction is carried out in liquid phase under microwave radiation.
摘要:
Multitube falling film reactor (MTR) for continuous manufacturing of sulfonated and/or sulfated products using gaseous, diluted sulfur trioxide, (SO3(dil)) to produce surface active agents or simply surfactants, useful in the cosmetic and detergent industry. Each individual nozzle-set comprises a male part (19) and the other half (45) on the male part (10). The male part (10) forms together with the female part (19), an annular slot (21) with a constant and under all operational conditions well defined length (47), which together with a fixed opening/width determines the individual pressure drop of the said slot and thereby the individual organic flow. With this arrangement, completely homogenous distribution of organic feed is achieved without the necessity of calibration.