摘要:
A process is provided for the preparation of dialkyl sulfides by reacting alkenes and hydrogen sulfide at elevated temperature in the presence of a Type X, Y or L zeolite containing from about 5 to 15 percent by weight of alkali metal, expressed as Me 2 0 (where Me is an alkali metal).
摘要:
A cold forming lubricant and a process for cold forming ferrous and non-ferrous metals such as steel and aluminum utilizes certain sulfur, chlorine and phosphorous compounds, or mixtures thereof, for example sulfurized or chlorinated oleic acids and phosphate esters of polyoxyethylene based non-ionic surfactants, in combination with a dry film lubricant.
摘要:
Vinylidene fluoride polymers of high quality are prepared consistently by an emulsion polymerization process in which the monomer, chain transfer agent (isopropyl alcohol), and an aqueous emulsion of the initiator (di- isopropylperoxydicarbonate) containing a fluoro surfactant of a limited class are fed incremently to an aqueous reaction medium containing a fluoro surfactant.
摘要:
The present invention relates to an improved process for the preparation of 2-methyl-3-(o-tolyl)-7-chloro-1,2,3,4-tetrahydro-4-oxo-6-quinazolinesulfonamide by reacting the corresponding benzamide precursor with acetaldehyde or an acetal at an elevated temperature in the presence of ethanol or isopropanol and an acid having a negative pKa.
摘要:
An article for storage and transport of biogenic fluids such as blood, blood fractions, intravenous feeding solutions and liquid phase-delivered drugs is formed of an additive-free uncharged thermoplastic polymer of vinylidene fluoride copolymerized with a monomer.
摘要:
An improved process is provided for the preparation of esters of polyhalophthalic acids, polyhalobenzoic acids, and polyhalophthalic anhydride useful as flame retardants for thermoplastic and thermosetting resins, which comprises the reaction of the above acids or anhydride with alcohols in the presence of certain metal and metallorganic compounds as catalysts. Also provided are certain esters per se.
摘要:
A composition of matter is disclosed which includes a major proportion of an organic di- or polysulfide, a catalytic amount of an amine/mercaptan mixture, and a stabilizing component in an amount sufficient to inhibit loss of catalytic activity in storage.