Catalyst for conversion and equilibration of para and ortho hydrogen
AssigneeAir Products and Chemicals, Inc.
InventorJames Ferguson White
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Abstract
A method for making a high activity ortho-para hydrogen conversion catalyst is set forth wherein a solution of ruthenium cation is mixed with a solution of a poorly coordinating anion such as aluminate to form a precipitate and the precipitate-containing solution is adjusted to a pH of 7 before recovering the catalyst. A product of this process and a method of using such product is disclosed.
Claims19
A method of preparing a catalyst of improved activity, comprising the steps of
- (a) mixing a solution of ruthenium cation with a solution of an anion comprising a ligand of poor coordinating power;
- (b) precipitating a catalyst from solution comprising a ruthenium salt of the ligand;
- (c) adjusting the pH of the precipitated catalyst-containing solution to a pH in the range of 6.2 to 7.8;
- and
- (d) recovering a precipitated ruthenium catalyst.
A method of preparing a ruthenium aluminate catalyst for conversion and equilibration of para and ortho hydrogen of improved activity, comprising the steps of:
- (a) mixing a solution of ruthenium cation with a solution of aluminate anion;
- (b) precipitating a ruthenium aluminate catalyst from solution;
- (c) adjusting the pH of the solution containing the precipitated catalyst to a pH in the range of 6.8 to 7.2;
- and
- (d) recovering the ruthenium aluminate by filtering the precipitate from the solution, washing the filtered precipitate and drying the washed precipitate.
A method of preparing a ruthenium silicate catalyst for conversion and equilibration of para and ortho hydrogen of improved activity, comprising the steps of:
- (a) mixing a solution of ruthenium cation with a solution of silicate anion;
- (b) precipitating a ruthenium silicate catalyst from solution;
- (c) adjusting the pH of the solution containing the precipitated catalyst to a pH in the range of 6.8 to 7.2;
- and
- (d) recovering the ruthenium silicate by filtering the precipitate from the solution, washing the filtered precipitate and drying the washed precipitate.
A ruthenium catalyst prepared by the process of mixing a solution of a ruthenium cation with a solution of an anion comprising a ligand of poor coordinating power, precipitating a catalyst from solution comprising a ruthenium salt of the ligand, adjusting the pH of the precipitated catalyst containing solution to a pH in the range of 6.2 to 7.8 and recovering the precipitated ruthenium catalyst.
A method for the conversion of hydrogen feed containing an ortho-para hydrogen distribution which differs from the equilibrium ortho-para hydrogen distribution at any particular temperature to hydrogen having an ortho-para content more closely approaching the equilibrium distribution thereof comprising contacting said hydrogen feed with a catalytic amount of a ruthenium catalyst prepared by a method of mixing a solution of a ruthenium cation with a solution of an anion comprising a ligand of poor coordinating power, precipitating a catalyst from solution comprising a ruthenium salt of the ligand, adjusting the pH of the precipitated catalyst containing solution to a pH in the range of 6.2 to 7.8 and recovering the precipitated ruthenium catalyst.
Dependencies are inferred from the claim text.