Abstract:
Fluorinated fluid conditioning systems are described. In particular, fluorinated fluid conditioning systems including an electrically non-conductive fluorinated fluid and a filter including desensitized activated carbon sorbent are described.
Abstract:
Fluorinated fluid conditioning systems are described. In particular, fluorinated fluid conditioning systems including an electrically non-conductive fluorinated fluid and a filter including desensitized activated carbon sorbent are described.
Abstract:
Chemoenzymatic process for coproducing a disulfide and a sulfoxide or a sulfone The present invention relates to a chemoenzymatic process for coproducing disulfide and sulfoxide or sulfone from a composition M comprising: 1) a sulfide, 2) optionally an oxidizing agent, 3) an organic compound bearing at least one thiol group, 4) an enzyme E catalyzing the oxidation of said sulfide to sulfoxide or to sulfone, 5) an enzyme D catalyzing the formation of a disulfide bridge between two equivalents of said organic compound bearing at least one thiol group to form a dimer, and 6) a cofactor common to the two enzymes E and D; and also to a composition enabling especially the implementation of this process. The present invention also relates to the use of a mercaptan for reducing a disulfide bridge formed between two equivalents of an organic compound bearing at least one thiol group, and more particularly to the use thereof as regeneration substrate of the process described above.
Abstract:
The present invention describes a process for preparing a poly(aryl ether ketone) by reacting a nucleophile with 4,4′-difluorobenzophenone (4,4′-DFBP) that is improved through the use of 4,4′-DFBP that meets one or more particular purity conditions. Also described are improved poly(aryl ether ketone) produced using the invention 4,4′-DFBP. Amounts of 2,4′-difluorobenzophenone (2,4′-DFBP), 4-monofluorobenzophenone (4-FBP), chlorine, and monochloromonofluorobenzophenone in 4,4′-DFBP are discussed.
Abstract:
The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone.
Abstract:
Methods for using sulfur-containing compounds comprising short chain aliphatic ester or amide moieties as solvents and compositions comprising these compounds are provided.
Abstract:
The present invention relates to processes for preparing 3-methylsulfonylpropionitrile. The processes provide a good yield and a good purity of the final product and provide a controllable reaction. The present invention also relates to a crystalline form of 3-methylsulfonylpropionitrile having X-ray diffraction peaks at 13.9±0.1, 19.2±0.1, 20.0±0.1, 22.5±0.1, 23.2±0.1, 25.7±0.1, 28.1±0.1, 29.9±0.1, and 30.6±0.1 degrees 20, and wherein the most intense peak is the peak at 13.9±0.1 degrees 20.
Abstract:
The invention relates to solvent compositions predominantly comprising at least one oxide of an organic sulfide, more particularly dimethyl sulfoxide, to which is added at least one odour-masking agent comprising at least one compound selected from monoesters, diesters or triesters, alcohols, ketones, aldehydes and terpenes.
Abstract:
Disclosed is a process for the extractive recovery of an acid catalyst from an aqueous mixture of glycolic acid with an extraction solvent comprising a tertiary amine or an onium carboxylate compound, a modifier, and a diluent. The acid catalyst, which can comprise strong acids such as sulfuric acid, alkyl sulfonic acids, and fluoroalkyl sulfonic acids, can be recovered by back extraction with aqueous formaldehyde and recycled to a process for the preparation of glycolic acid by the acid-catalyzed carbonylation of formaldehyde.
Abstract:
A method for reducing the cyanide levels in a mesotrione sample, said method comprising: (i) taking an aqueous solution of the mesotrione sample in an aqueous solvent, (ii) adjusting the pH of said aqueous solution to a value of 9.5 or higher, and (iii) crystallising the mesotrione out of solution is disclosed.