摘要:
A monohalomethane is converted to a product comprising hydocarbons having at least 2 carbon atoms and in particular aliphatic hydrocarbons in the gasoline boiling range by contact with a synthetic crystalline gallosilicate zeolite loaded either with at least one modifying cation selected from hydrogen and metals of Groups I to VIII of the Periodic Table or with a compound of at least one Group I to VIII metal.
摘要:
Process for converting heterosubstituted methanes, such as methyl alcohol, methyl ether, methyl mercaptan, dimethyl sulfide, methyl halides, methylal, methylamine and the like, by contacting such methanes with bifunctional acid-base catalysts at elevated temperatures, between 200 and 450 C, preferably between 250 and 375 C, to produce predominantly lower olefins, preferably ethylene and propylene. The catalysts of preference are those derived from halides, oxyhalides, oxides, sulfides or oxysulfides of transition metals of Groups IV, V, VI, VIII of the Periodic Table, such as tantalum, niobium, zirconium, tungsten, titanium, chromium and the like, deposited on acidic oxides and sulfides such as alumina, silica, zirconia or silica-alumina.
摘要:
A reagent comprising the product of the reaction of an alkali metal hydroxide with a polyglycol or a polyglycol monoalkyl ether and oxygen, effects complete decomposition of halogenated organic compounds, such as polychlorinated biphenyls (PCBs), when mixed therewith in the presence of oxygen.
摘要:
Aryl and heteroaryl mono chlorides are coupled in an aprotic solvent under an inert atmosphere by a catalyst mixture of a nickel compound and a ligand in the presence of a reducing metal; catalyst composition comprising a nickel compound, at least one ligand, magnesium or manganese, and a promoter.
摘要:
Aryl and heteroaryl mono chlorides are coupled in an aprotic solvent under an inert atmosphere by a catalyst mixture of a nickel compound and a ligand in the presence of a reducing metal; catalyst composition comprising a nickel compound, at least one ligand, magnesium or manganese, and a promoter.
摘要:
An installation for carrying out a process of conversion of natural gas into chemicals, comprising a bromination unit (111) comprising at least one bromination reactor (19) and at least one dibromomethane separator (25), the one or more dibromomethane separators (25) being downstream of said at least one bromination reactor (19); a conversion unit (113) comprising at least one homologation reactor (31); a physical separation unit (115); wherein the bromination unit (111), the conversion unit (113) and the physical separation unit (115) are fluidically connected in series, the conversion unit (113) being downstream of said bromination unit (111) and upstream of said physical separation unit (115); a first line to conduct the chemicals exiting the physical separation unit (115) into one products-recovery unit (119) and a third line to conduct one hydrogen bromide-rich stream (69, 72, 135) into an electrolysis unit (117).
摘要:
The present invention refers to a process making use of a radical initiator system comprising peroxy compounds, in particular peroxyketals, in the presence of an acid catalyst to initiate radical processes at low temperature, such as room temperature and below.
摘要:
The present invention refers to a process making use of a radical initiator system comprising peroxy compounds, in particular peroxyketals, in the presence of an acid catalyst to initiate radical processes at low temperature, such as room temperature and below.
摘要:
Disclosed is a method for converting an alkyl halide to an olefin. The method includes contacting a silicoaluminophosphate (SAPO) catalyst with a feed that includes an alkyl halide under reaction conditions sufficient to produce an olefin hydrocarbon product that includes C2 to C4 olefins. The SAPO catalyst has bimodal acidity designated as weak acid sites and strong acid sites. The weak acid concentration is less than 0.55 mmol/g-cat and the total acid concentration is less than 1.5 mmol/g-cat.