摘要:
Catalyst supports, catalyst systems, methods for the preparation thereof, and dimerization process therewith are provided catalyst supports are prepared from an alkali metal carbonate, water, alcohol, and optionally at least one carbonaceous compound. Catalyst systems comprise at least one elemental alkali metal deposited on the catalyst support. Optionally, the catalyst system further comprises at least one promoter.
摘要:
Novel compositions are provided for the cleaning and inhibiting corrosion of metallic surfaces. The cleaning composition has an active ingredient consisting of at least one sulfur containing compound selected from the group consisting of a bis(N-2 pyrrolidonyl), an (N-2 pyrrolidonyl), or a bis(N-succinimidyl) sulfur-containing compound.
摘要:
A method is provided for preparing mercaptans by catalytic cleavage of organic sulfides with hydrogen sulfide in the presence of a supported phosphotungstic acid catalyst. The process is particularly advantageous with n-alkyl sulfide feedstock and being highly selective for producing n-alkyl mercaptan product. In one embodiment the presence of carbon disulfide in the reaction mixture increases the conversion at low temperature as compared to the process without the presence of carbon disulfide.
摘要:
Mercaptans are prepared by reacting an organic carbonyl compound with sulfur or hydrogen sulfide in the presence of a catalyst consisting essentially of cobalt, molybdenum and an inorganic oxide support material.
摘要:
Molybdenum or rhenium containing olefin disproportionation catalysts exhibit marked increase in olefin disproportionation activity when thermally activated by heating in the presence of water or water vapor.
摘要:
In a method for preparing mercaptans by the addition of hydrogen sulfide to olefins in the presence of sulfactive catalysts a method is provided for increasing the total conversion of reactants to mercaptans by including carbon disulfide in the reaction mixture. In a preferred embodiment carbon disulfide is present in the reaction mixture of hydrogen sulfide and ethylenically unsaturated compounds in an amount in the molar ratio of about 5/1 to about 30/1 hydrogen sulfide to carbon disulfide.
摘要:
A composition comprises at least one inorganic oxide and an oxygen-containing metal compound selected from the group consisting of a metal hydroxide, a metal oxide, and combinations of any two or more thereof. The composition can be optionally supported on a support such as an alumina. A process for producing mercaptans comprises contacting an alcohol with hydrogen sulfide in the presence of the composition under a condition sufficient to produce a mercaptan.
摘要:
Hydrogen sulfide is removed from a fluid stream containing hydrogen sulfide by contacting the fluid stream under suitable absorbing conditions with an absorbing composition consisting essentially of zinc oxide and silica. Additionally, the absorbing composition may contain binders and may be promoted, preferably with nickel oxide.
摘要:
Catalysts and processes for the dimerization or co-dimerization of dimerizable olefins are provided. The catalysts comprise at least one elemental alkali metal and a finely divided glass promoter on an alkali metal carbonate support. Optionally, the support may also contain a carbonaceous component, an inorganic metal oxide or stainless steel. The finely divided glass promoter may be combined with finely divided stainless steel, elemental copper, or elemental cobalt.
摘要:
A catalyst system consisting essentially of a cobalt salt of a carboxylic acid, an alkali or alkaline earth metal hydroxide, and an alkanol is set forth and has been employed to oxidize a mercaptan to a disulfide.