摘要:
A process for producing a cycloolefin by partial hydrogenation of a monocyclic aromatic hydrocarbon with hydrogen in the presence of a ruthenium catalyst, water and a metal sulfate, wherein the hydrogenation is conducted while changing the concentration of the metal sulfate dissolved in an aqueous phase in which the catalyst is present.
摘要:
This is a catalyst and a process for partially hydrogenating polycyclic and monocyciic aromatic hydrocarbons such as benzene, naphthalenes, biphenyls, and alkylbenzenes to produce the corresponding cyclooiefins. The catalyst is a hydrogenation catalyst comprising ruthenium on a composite support. It is a process in which the product cycloolefin is produced in high yield and with high selectivity.
摘要:
Mixtures consisting essentially of cyclohexylbiphenyls, dicyclohexylbenzenes, phenylbicyclohexyls and tercyclohexyls are outstandingly suitable as heat transfer media. The mixtures can be prepared from biphenyl and cyclohexanol in the presence of bleaching earths and subsequent hydrogenation.
摘要:
A process is described for carrying out the dehydrogenation or hydrogenation, including hydrogenolysis, of a hydrocarbon in the presence of one or more soluble fullerene catalysts which have been dissolved in the hydrocarbon (when the hydrocarbon is a liquid capable of dissolving the fullerene catalyst) or dissolved in a solvent which is also a solvent for the hydrocarbon (when the hydrocarbon either is not a liquid or is not a liquid which is a solvent for the fullerene catalyst). The use of a liquid catalyst, i.e., a dissolved fullerene catalyst, inhibits coking reactions to thereby inhibit formation of coke on a solid catalyst or catalyst support by elimination of nucleation points or growth regions for such coke formation.
摘要:
This is a catalyst and a process for partially hydrogenating polycyclic and monocyclic aromatic hydrocarbons such as benzene, naphthalenes, biphenyls, and alkylbenzenes to produce the corresponding cycloolefins. The catalyst is a hydrogenation catalyst comprising ruthenium on a composite support. It is a process in which the product cycloolefin is produced in high yield and with high selectivity.
摘要:
A method is provided for testing the activity of a catalyst for a chemical reaction in which naphthalene is reversibly hydrogenated by gaseous hydrogen into tetralin, which avoids the need to pressurize a test vessel with hydrogen, enables simple apparatus to be used and gives good accuracy. Tetralin and catalyst are introduced into a sealed container, the container is heated to a reaction temperature for a predetermined time, and the amount of naphthalene formed by dehydrogenation is determined. The method is applicable to the measurement of catalyst activity for catalysts used in the production by hydrogenation of coal-derived liquids.
摘要:
A method for production of anthracene from phenanthrene is disclosed. Phenanthrene is hydrogenated at a nickel on a carrier catalyst at temperatures from about 140.degree. C. to 170.degree. C. under a pressure of from about 10 to 30 bar by gradual addition of hydrogen. The hydrogenation product is separated by distillation into sym.-octahydrophenanthrene and asym.-octahydrophenanthrene. The sym.-octahydrophenanthrene is isomerized in the presence of methylene chloride as a solvent and of aluminum chloride as a catalyst at a temperature from about -30.degree. to +5.degree. C. to sym.-octahydroanthracene. The sym.-octahydroanthracene is dehydrogenated at a chromium oxide-aluminum oxide catalyst at temperatures from about 450.degree. to 550.degree. C. to anthracene.The resulting anthracene is obtained with high yield and is very pure after a single recrystallization step.
摘要:
An improved method for the preparation of cyclohexanol and/or cyclohexanone from benzene. Cyclohexanol and/or cyclohexanone is prepared by the steps of hydrogenating benzene to form a hydrogenation reaction mixture containing cyclohexene, unreacted benzene, and by-product cyclohexane, hydrating cyclohexene thus obtained to form a hydration reaction mixture containing cyclohexanol, unreacted benzene and by-product cyclohexane and/or oxidating this cyclohexene to form an oxidation reaction mixture containing cyclohexanone, unreacted benzene and by-product cyclohexane, recovering from said hydration reaction mixture the cyclohexanol product and/or from said oxidation reaction mixture the cyclohexanone product, and an organic phase containing unreacted benzene and by-product cyclohexane, and recycling unconverted benzene to the benzene hydrogenation step. The improvement comprises introducing the organic phase containing unreacted benzene and by-product cyclohexane into a dehydrogenation zone wherein by-product cyclohexane is dehydrogenated to benzene and recycled to the hydrogenation step together with the unreacted benzene.
摘要:
A process for separating and recovering 2,6-dimethylnaphthalene from a dimethylnaphthalene mixture containing
WHICH COMPRISES THE STEPS OF: I. PARTIALLY HYDROGENATING THE ABOVE DIMETHYLNAPHTHALENE MIXTURE TO A DIMETHYLTETRALIN MIXTURE, II. PRIOR TO OR AFTER ISOMERIZATION OF THE SAID DIMETHYLTETRALIN MIXTURE SEPARATING THE PARTIALLY HYDROGENATED DIMETHYLTETRALINS (I) of said
FROM PARTIALLY HYDROGENATED DIMETHYLTETRALINS (II) of said
AND COLLECTING DIMETHYLTETRALINS (I), iii. dehydrogenating said dimethyltetralins (I) to be
AND IV. SEPARATING AND RECOVERING 2,6-DIMETHYLNAPHTHALENE FROM THE RESULTANT DEHYDROGENATION PRODUCT AND RECYCLING THE RESIDUAL DIMETHYLNAPHTHALENES TO THE ABOVE PARTIAL HYDROGENATION STEP (I).
摘要:
A PERFUME COMPOSITION CONTAINING A HYDROGENATED INDANE DERIVATIVE HAVING THE FORMULA:
1,1,2,3,3-PENTA(CH3-)HEXAHYDROINDAN WITH DASHED LINES
BETWEEN THE 3A AND 4, 4 AND 5, 5 AND 6, 7 AND 7A, AND
7A AND 3A POSITIONS
WHEREN THE DASHED LINES REPRESENT SINGLE OR DOUBLE BONDS, NO MORE THAN TWO OF THE DASHED LINES REPRESENT DOUBLE BONDS AND, WHEN TWO DOUBLE BONDS ARE PRESENT, SUCJ BONDS ARE UNCONJUGATED.