Abstract:
In a process for the hydroconversion of sulphur-containing heavy hydrocarbons in which the hydrocarbons and a gas containing carbon monoxide and steam are converted in a reactor at elevated temperature and pressure, improved results are obtained using a gas comprising at least 3% by volume of hydrogen sulphide, based on water free gas.
Abstract:
An HIPR (high internal phase ratio) emulsion of oil in water is prepared by directly mixing 70 to 98% by volume of a viscous oil having a viscosity in the range 200 to 250,000 mPa.s at the mixing temperature with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant or an alkali, percentages being expressed as percentages by volume of the total mixture. Mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted oil droplets having mean droplet diameters in the range 2 to 50 micron separated by thin interfacial films. The emulsions are much less viscous than the oils from which they are prepared and may, optionally after dilution, be pumped through a pipeline. Viscous crude oils may be transported by this method.
Abstract:
A product comprising hydrocarbons having at least 2 carbon atoms is produced by contacting a monohalomethane at elevated temperature, e.g. 200 to 600oC, with a synthetic crystalline aluminosilicate zeolite having a silica to alumina molar ration of at least 12:1 and containing cations of either hydrogen, copper or a metal capable of forming an amphoteric oxide, which cations are introduced either by exchange and/or by deposition, provided that when the cation is hydrogen the zeolite is Theta-1. At temperatures below 330oC the product predominantly comprises aliphatic hydrocarbons, of which a substantial proportion is isoalkanes and isoalkenes.
Abstract:
Mineral particles are separated from particles of solid carbonaceous fuel by forming a mixture with water, ferromagnetic particles and hydrophobic oil at a weight ratio of carbonaceous fuel to magnetic particles of at least 25:1, shearing to flocculate the carbonaceous fuel particles, and then subjecting the product, to magnetic separation.
Abstract:
Esters are converted to alcohols by vapour phase hydrogenation over Ru, Ni or Rh, a Group IA, IIA, lanthanide or actinide promoter, and a carbon support of defined surface area characteristics.
Abstract:
Hydrocarbon fuels, for example straight run gasoline and cat-cracked spirit, are up-graded by reacting the fuel with a hydrocarbyl hydroperoxide at a temperature greater than the decomposition temperature of the hydroperoxide and at a pressure sufficient to maintain the reactants in the liquid phase. The reaction may be carried out in the presence or absence of a metal catalyst for the decomposition of the hydroperoxide and optionally in the presence of a solid not generally regarded as a hydroperoxide decomposition catalyst, e.g. alumina, silica or silica-alumina.
Abstract:
Dihydrocarbyl oxalates are produced by reacting under substantially anhydrous conditions a dihydrocarbyl peroxide with carbon monoxide in the presence of a catalyst comprising a platinum group metal in compound or elemental form and a copper compound, optionally in the presence as promoter of a heterocyclic aromatic nitrogen compound.
Abstract:
Dihydrocarbyl carbonates are produced by reacting in the liquid phase under substantially anhydrous conditions a dihydrocarbyl peroxide, a primary or secondary alcohol and carbon monoxide in the presence as catalyst of copper in elemental or compound form, optionally in the presence as promoter of a heterocyclic aromatic nitrogen compound. The products are useful as additives to internal combustion engine fuels.
Abstract:
A process for recovering Platinum Group metals from material comprising one or more Platinum Group metals and one or more Group IA metals supported on carbon comprises heating at a temperature between 700 DEG C and 1150 DEG C in a stream of an inert gas or vacuum then in a stream of carbon dioxide.
Abstract:
Crystalline beta silicon carbide is deposited on a compatible substract by subjecting a mixture of hydrocarbon vapour and a silane to a glow discharge at a partial pressure of hydrocarbon vapour and silane of not more than 1 Pa while maintaining the substrate at 600 DEG to 1000 DEG C.