Catalytic process
AssigneeImperial Chemical Industries PLC
InventorsSamuel David Jackson, Frederick Ernest Hancock, Bernard John Crewdson
Life of this patent
Estimating the term…
Abstract
Synthesis of small quantities of compounds such as methanol from reagents, especially radio-labelled reagents such as .sup.11 C oxides, in a carrier gas by a catalytic reaction using a catalyst that has been pre-conditioned for the reaction by previous use for the desired reaction and has then been passivated, or has been maintained in the pre-conditioned state, until contacted with said carrier gas. Where the product is adsorbed by the catalyst, it may be desorbed by heating or displaced by contacting the catalyst with a material, e.g. a catalyst poison that is more strongly adsorbed. Such a more strongly adsorbed material may react with the adsorbed catalytic product to produce a desired product.
Claims11
A catalytic process for the reaction of a carbon-containing compound as a primary reagent comprising contacting a carrier gas containing an amount of not more than about 24 .mu.moles of the primary reagent, together with such other reagent or reagents as may be needed for the reaction, with a catalyst for the desired reaction under reaction conditions favourable to said reaction, wherein the catalyst has been pre-conditioned by previous use for the desired reaction and has been passivated, or has been maintained in the pre-conditioned state, until contacted with said carrier gas, characterised in that the product of the catalytic reaction of the primary reagent is adsorbed on the catalyst and, after effecting said catalytic reaction, said product is desorbed from the catalyst by contacting said catalyst with a stream of a carrier gas containing a compound that is not a carbon compound and which is adsorbed by the catalyst more strongly than said product.
Dependencies are inferred from the claim text.