摘要:
A catalytic reactor comprising an elongated reaction chamber and catalytic elements composed of alumina and a hydrogenation catalyst vertically disposed within the reaction chamber.
摘要:
A novel catalytic reactor comprising an elongated reaction chamber and catalytic elements composed of alumina and a hydrogenation catalyst vertically disposed within the reaction chamber and a coal hydrogenation process using such reactor.
摘要:
The present invention is a method for obtaining an electrical signal from a patient that corresponds to a meridian. The present method contemplates locating a dermal area of a patient proximate a meridian. One embodiment of the present invention comprises locating a dermal area by iteratively measuring and comparing the conductivity of a patient's skin until a significant level of conductance is indicated. A probe may then be placed in contact with the dermal area, and actuated to obtain an electrical signal therefrom. The probe tip may be specially designed to apply an appropriate amount of pressure to the dermal area to directly sense a meridian, and configured to avoid erroneous measurements resulting from misalignment of the probe or probe tip.
摘要:
A statistically large population of particles of amorphous precipitated silica comprising pigmentary phase particles and glassy phase particles and having a glassy phase fraction in the range of from 0.3 to 30 area percent is useful as an abrasive for dentifrice compositions, especially toothpaste.
摘要:
Acrylonitrile is produced by passing a gaseous mixture comprising propylene, molecular oxygen and ammonia upwardly through a fluidized bed comprising particles of a highly-active acrylonitrile catalyst in physical admixture with particles of a composite consisting essentially of antimony oxide and silica. The use of the antimony oxide-silica composite moderates the effect of the highly-active acrylonitrile catalyst reducing its activity sufficiently to enable the use of longer residence times, but without reducing the acrylonitrile selectivity of the catalyst.
摘要:
A process for producing aliphatic amines which comprises reacting an aliphatic alcohol or an aliphatic aldehyde with an aminating agent selected from the group consisting of ammonia, a primary amine and a secondary amine in the liquid phase in the presence of an unsupported catalyst consisting essentially of (1) copper oxide or copper hydroxide and (2) an organo nickel compound.
摘要:
There is provided a solid, particulate, catalytic complex suitable for the stereospecific polymerization of olefins prepared by reducing TiCl.sub.4, contacting the resultant reduced solid with a complexing agent to obtain a treated solid and contacting the treated solid with TiCl.sub.4 in the presence of silica which has been treated with an alkylaluminum halide. When such a catalyst complex is combined with a suitable activator to polymerize olefins, a high degree of stereospecificity is attained, the activity of the catalyst complex is reduced for polymerization control and the efficiency of the titanium employed is enhanced.
摘要:
A process for hydrogenating an unsaturated organic compound which comprises contacting the same with hydrogen in the presence of a catalyst composed of a support containing (1) (A) a Group IIB metal compound selected from the group consisting of zinc and cadmium compounds, (B) a combination of said zinc and cadmium compounds or (C) a combination of at least one of said Group IIB metal compounds with at least one Group IIA metal compound selected from the group consisting of magnesium, calcium, strontium and barium compounds, (2) alumina and (3) aluminum phosphate and carrying nickel thereon.
摘要:
A process for preparing alkyldimethylamines which comprises passing through a fixed bed, containing a copper catalyst, optionally chromium oxide, and an oxide of a Group I metal, selected amounts of dimethylamine and an alcohol or mixtures of alcohols.
摘要:
Ethylbenzene hydroperoxide is prepared by the oxidation of ethylbenzene with molecular oxygen in the presence of a minute amount of solid barium oxide.