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| Number | Title | Issue Date |
| 4476237 | Separation of tars from carbonylation reaction mixtures Tarry residues often are formed in carbonylation reactions, such as those in which esters or ethers are carbonylated to produce ethylidene diacetate or carboxylic acid anhydrides, such as acetic anhydride. Such residues contain Group VIII noble metal cata... | 10/09/1984 |
| 4469804 | Niobium or tantalum/halogen-containing catalyst regeneration process Catalysts containing niobium or tantalum halides which have been deactivated by contact with oxygen are regenerated by being contacted with a halogenated hydrocarbon.... | 09/04/1984 |
| 4440570 | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether The disclosure relates to a process for purifying and recovering a contaminated catalyst solution which is obtained in the carbonylation of methyl acetate and/or dimethylether, the catalyst solution containing carbonyl complexes of noble metals of group V... | 04/03/1984 |
| 4387056 | Process for separating zero-valent nickel species from divalent nickel species Separating active nickel hydrocyanation catalyst from deactivated catalyst by contact with selected solvents.... | 06/07/1983 |
| 4364907 | Process for recovery of rhodium values Disclosed is a process for the recovery of residual rhodium from tar obtained by submitting a rhodium-containing catalyst-tar solution to an extraction using methyl iodide and aqueous hydrogen iodide, thereby recovering catalyst values in the aqueous phas... | 12/21/1982 |
| 4283304 | Process for removing triorganophosphine from a liquid composition Process for removing triorganophosphine from a rhodium containing composition or a rhodium containing concentrate thereof.... | 08/11/1981 |
| 4216083 | Process for complete or selective removal of salts from aqueous solution A process by which salts are removed or recovered from an aqueous solution by means of a polyether, by contacting the aqueous solution with active carbon impregnated with a cyclic or linear polyether, and then eluting ether and salt successively from the ... | 08/05/1980 |
| 4152249 | Process for purifying hydrocarbons by adsorption A hydrocarbon cut is purified by contact with a solid adsorption resin consisting of a porous polycondensate or cross-linked copolymer comprising pyridyl or hydroxy groups and having pores essentially in the range of 6 to 300 Angstroms.... | 05/01/1979 |
| 4148749 | Regeneration of metal promoted platinum group catalyst by superhalogenating at the end of a hydrocarbon conversion cycle Process for regenerating hydrocarbon conversion catalysts, particularly for reforming and isomerization, which comprises superhalogenating the deactivated catalysts, burning the accumulated coke in a controlled manner preferably in a series of steps at di... | 04/10/1979 |
| 4122035 | Process for reclaiming synthetic magnesium silicate or aluminum silicate adsorbents employed in the purification of polyether polyols A process for recovering a catalyst adsorbent from a polyol-adsorbent residue by treatment of the polyol-adsorbent residue with organic solvents. This adsorbent can then be recycled for use in the further removal of alkaline catalysts from polyether polyo... | 10/24/1978 |
| 4065405 | Recovery of tantalum and/or niobium pentafluorides from a hydrocarbon conversion catalyst Tantalum and/or niobium pentafluorides may be recovered from a deactivated or partially deactivated hydrocarbon conversion catalyst comprising (a) a metal pentafluoride selected from the group consisting of tantalum pentafluoride, niobium pentafluoride an... | 12/27/1977 |
| 4058457 | Recovery of activated carbon Activated carbon employed for removing weakly held contaminants such as organic chemicals from water, e.g., drinking water, can be recovered or regenerated by back flushing with iodine in water or an organic solvent and then the iodine recovered by reduci... | 11/15/1977 |
| 4048093 | Processes for regenerating dispersions of ligand-stabilized, palladium(II) halide complexes used in carbonylation catalysts This invention concerns processes for the regeneration of carbonylation catalysts consisting of dispersions of ligand-stabilized palladium(II) halide complexes in quaternary ammonium, phosphonium and arsonium salts of trihalostannate(II) and trihalogerman... | 09/13/1977 |
| 4042530 | Oxychlorination sources for regenerating dispersions of ligand-stabilized, palladium (II) halide complexes used as carbonylation catalysts This invention concerns process for the regeneration of carbonylation catalysts consisting of dispersions of ligand-stabilized palladium(II) halide complexes in quaternary ammonium, phosphonium and arsonium salts of trihalostannate(II) and trihalogermanat... | 08/16/1977 |
| 4013584 | Processes for regenerating dispersions of ligand-stabilized, palladium and platinum (II) halide complexes used in carbonylation and hydroformylation catalysis This invention concerns chlorinating processes for the regeneration of carbonylation and hydroformylation catalysts consisting of dispersions of ligand-stabilized palladium(II) and platinum(II) halide complexes in quaternary ammonium, phosphonium and arso... | 03/22/1977 |
