摘要:
Compositions and methods for repelling arthropods. The compositions include a carrier and an arthropod repelling compound, which can be a compound discovered by a novel and complex cheminformatic process to demonstrate repellency behavior across a broad spectrum of arthropods. The compound can be a thiane compound, a pyrrolidone compound, a cyclohexadiene compound, a cyclohexenone compound, a cyclohexene compound, a furanone compound, a pyran compound, a tetrahydropyran compound, a thiazolidine compound, a thiazoline compound, a dihydrothiophene compound, a dithiolane compound, a dithiane compound, an epoxide compound, an oxathiane compound, a cyclopentene compound, a cyclohexane compound, a quinoline compound, an oxazoline compound, a tetrahydropyridine compound, and an imidazolidinone compound, or a combination thereof.
摘要:
This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO2 and the selective reaction with organic compounds.
摘要:
Farnesene dimers and/or farnesane dimers and compositions thereof are described. The compositions provided comprise conventional additives. Methods of making and using the compounds and composition are also disclosed.
摘要:
This invention provides metal complexes being useful as catalyst components in metathesis reactions and in reactions involving the transfer of an atom or group to an ethylenically or acetylenically unsaturated compound or another reactive substrate and, with respect to a sub-class thereof, for the polymerisation of α-olefins and optionally conjugated dienes, with high activity at moderate tempera-tures. It also provides methods for obtaining polymers with very narrow molecular weight distribution by means of a living reaction. It also provides methods for making said metal complexes and novel intermediates involved in such methods. It further provides derivatives of said metal complexes which are suitable for covalent bonding to a carrier, the product of such covalent bonding being useful as a supported catalyst for heterogeneous catalytic reactions. It also provides a direct one-step synthesis of pyrrole, furan and thiophene compounds from diallyl compounds.
摘要:
A method for producing a cycloolefin and a cycloalkane, which method comprises: a step of hydrogenating a monocyclic aromatic hydrocarbon under an acidic condition in the presence of a catalyst composition, (i) wherein said catalyst composition is a slurry which comprises a ruthenium catalyst, water and zinc sulfate, and which is preserved, prior to being used in said hydrogenation reaction, under a high temperature and high pressure hydrogen atmosphere of from 100 to 200.degree. C. and from 1 to 100 atm for 1 hour or more, and (ii) wherein said hydrogenation reaction is conducted under a controlled pressure, while maintaining a phase separated state of: (a) an oil phase comprising, as main components, the starting materials and the products; and (b) a water phase comprising water as a main component, to thereby control a formation molar ratio of the cycloolefin and the cycloalkane to be formed.
摘要:
A novel catalytic composition comprises at least one quaternary ammonium and/or phosphonium salt in which the anion is selected from the group formed by tetrafluoroborate, tetrachloroborate, hexafluorophosphate, hexafluoroantimonate, hexafluoroarsenate, trifluorosulphonate, fluorosulphonate, tetrachloroaluminate, dichlorocuprate, and trichlorozincate, and at least one complex of a transition metal from groups 8, 9 and 10, i.e., iron, ruthenium, cobalt, rhodium iridium, nickel, palladium and platinum. Application to total or selective hydrogenation of unsaturated compounds such as monoolefins, diolefins, acetylenic compounds, aromatic compounds, polynuclear aromatic compounds. Hydrogenation may be accompanied by isomerisation.
摘要:
A process for the cyclodimerization of 1,3-butadienes to 4-vinylcyclohexenes. The process involves contacting butadiene with a copper (I)-aluminosilicate zeolite prepared by (a) an impregnation method, or (b) heating a solid mixture of a copper salt and the zeolite, or (c) contacting vapors of a copper salt with the zeolite. The catalysts exhibit long life and good activity in the claimed process. The impregnated Cu(I)-catalyst is claimed.
摘要:
Catalysts suitable for the dimerization of a diolefin, e.g. butadiene to 4-vinylcyclohexene, are prepared by reacting (1) iron chloride and sodium nitrite or alternatively (2) iron nitrosyl chloride with (3) carbon monoxide in an organic solvent in the presence of a readily oxidizable metal, e.g. tin. The catalyst solution is filtered prior to use to remove particulate matter such as unreacted tin.While the reaction employing iron chloride and sodium nitrite is preferred, the catalyst produced by either method contains a minimum of reducing agent and by-products. It can be isolated and stored in the absence of the butadiene monomer while retaining its stability and activity.
摘要:
Aromatic hydrocarbons are selectively partially hydrogenated to cyclic olefins by contacting the aromatic hydrocarbon with hydrogen and a ruthenium catalyst in an aqueous dispersion containing a salt of a phosphorus acid.