摘要:
This invention relates to rhodium compounds having the general formula:HRh(CO)(XR.sub.3).sub.n (YR'.sub.3).sub.3-nwherein X is phosphorus, arsenic or antimony; Y is arsenic or antimony when X is phosphorus, Y is phosphorus or antimony when X is arsenic, or Y is phosphorus, arsenic or antimony when X is antimony; R and R' are aryl groups; and n is an integer of 1 or 2. Further, it relates to a process for the preparation of aldehydes by the hydroformylation of olefins in the presence of a rhodium catalyst, and more particularly for the production of aldehydes by the reaction of olefins such as propylene with carbon monoxide and hydrogen in the presence of HRh(CO)PPh.sub.3).sub.2 (AsPh.sub.3)/excess PPh.sub.3 and AsPh.sub.3 or HRh(CO)(PPh.sub.3)(AsPh.sub.3).sub.2 /excess PPh.sub.3 and AsPh.sub.3.
摘要:
In the reaction of conversion of nitriles to amides, more particularly, but not exclusively, acrylonitrile to acrylamide, the improvement consisting in the adoption, as a catalyst, of a copper-based catalyst which is prepared by reacting an organic copper chelate with aluminum-alkyl and/or an aluminum hydride. Higher yields and higher selectivity are obtained over the usual copper-based catalysts.
摘要:
In an oxo process wherein an olefin is caused to react with carbon monoxide and hydrogen, a rhodium catalyst is provided by carrying out the hydroformylation in the presence of a rhodium source and free mixed ligands comprising a tertiary organo phosphorus and tertiary organo arsenic in excess of the quantity required for coordination to the rhodium atom. For example, HRh(CO)(PPh.sub.3).sub.3 with excess AsPh.sub.3 /PPh.sub.3 may be used to give a high reaction rate and good selectivity to n-aldehyde.
摘要:
For hydrogenating unsaturated compounds, and especially those containing aromatic rings, a catalytic system of novel conception is suggested. This is a quaternary heterogeneous system which comprises an elemental metal of Groups IIA or IIIA, a primary or a secondary amine, a Ni or a Co halide, and an activator such as Na, NaH, NaAlH.sub.4 MgEt.sub.2 or AlEt.sub.3.Very satisfactory results as to yields and smoothness of reaction are obtained in the conversion of benzene to cyclohexane and of toluene to methylcyclohexane.
摘要:
Cobalt hydride complexes containing tertiary phosphine, arsine or stibine ligands are employed as catalysts for isomerization of olefins. Enhanced catalytic activity is achieved by use of nitrogen in the isomerization.
摘要:
A METHOD FOR THE RECOVERY OF THE COMPLEXES OF GROUP VIII METALS AND BIPHYLLIC LIGANDS FROM HYDROCARBONS OR HIGH BOILING RESIDES FORMED HYDROCARBONYLATION OF OLEFINS. THE GROUP VIII CATALYST METAL IS RECOVERED IN ACORDANCE BY TREATMENT OF THE HIGH BOILING FRACTION OF A HYDROFORMYLATION REACTION MEDIUM WITH A SOLUTION OF SULFURIC, PERCHLORIC OR LOW MOLECULAR WEIGHT ALKYL OR ARYL SULFONIC ACIDS AT A TEMPERATURE FROM ABOUT 5* TO 125*C, AND A PRESSURE FROM ABOUT 1 TO 1000 ATMOPHERES, SUFFICIENT TO MAINTAIN LIQUID PHRASE CONDITIONS DURING THE CONTACTING. THE PRESENCE OF A HYDROCARBON OLEFIN HAVING FROM 2 TO ABOUT 25 CARBONS IN THE EXTRACTION STEP ENTHANCE THE EXTRACTION OF THE GROUP VIII METAL CATALYST COMPLEX. THE GROUP VIII METAL COMPLEX CAN BE PRECIPITATED FROM THE ACID EXTRACT PHASE BY DILUTION WITH WATER TO LOWER THE ACID STRENGTH OF THE EXTRACT.
摘要:
Exemplary embodiments of the present invention relate to the processing of hydrocarbon-containing feedstreams in the presence of an interstitial metal hydride containing catalyst comprising a surface, and a Group VI/Group VIII metal sulfide coated onto the surface of the interstitial metal hydride. The catalysts and processes of the present invention can improve overall hydrogenation, product conversion, as well as sulfur reduction in hydrocarbon feedstreams.
摘要:
A catalyzed metal hydride alloy is disclosed, which includes lithium amide and magnesium hydride and rubidium hydride is the catalyst. A method of making the metal hydride alloy includes combining rubidium hydride with lithium amide and magnesium hydride in a vessel to form a mixture and mechanically milling the mixture. A method of manufacturing rubidium hydride is also disclosed which includes milling rubidium metal in a vessel pressurized with hydrogen gas at an initial minimum rotation rate and increasing the rotation rate to a maximum rotation rate, alternating between periods of milling and rest, re-pressurizing the vessel with hydrogen during the rest periods, and incubating the contents of the vessel.