B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/69
B01J 23/94 (2006.01) B01J 23/92 (2006.01) B01J 31/08 (2006.01) B01J 31/40 (2006.01)
Patent
CA 1145738
ABSTRACT OF THE DISCLOSURE: According to the present invention there is in general provided a process for the recovery of an oxidation catalyst heavy-metal component from a high-boiling distillation residue obtained from the esterified oxidation product resulting from the oxidation of an alkyl aromatic compound in the liquid phase with oxygen or an oxygen containing gas in the presence of a dissolved oxidation catalyst having a heavy-metal component, the heavy-metal component being a member of the group consisting of cobalt, manganese, nickel and mixtures thereof, which comprises providing an aqueous acidic extract containing said heavy-metal component, said extract being obtained as a result of extracting said heavy-metal component from said high-boiling distillation residue or from the ash obtained on combustion of said high- boiling distillation residue, said extract containing as acid, one or more aliphatic monocarboxylic acids containing 1 to 4 carbon atoms and (a) treating the aqueous acidic extract with a strongly acidic cation exchange resin in the alkali metal ion form, optionally at an elevated temperature, until the exchange capacity has been reached and (b) subsequently washing the cation exchange resin with a suitable washing liquid, optionally at an elevated temperature , and (c) regenerating the cation exchange resin, e.g. at room temperature, for example, with an aqueous solution containing a member of the group consisting of mono- carboxylic acids having 1 to 4 carbon atoms (e.g. acetic acid, formic acid etc.), alkali metal salts of said carboxylic acids (e.g. Na+ or K+ acetate) and mixtures thereof, to displace said heavy-metal component and recover as product an aqueous solution containing said heavy-metal component.
366654
Diessel Karl-Heinz
Modic Rudolf
Struss Friedrich
Dynamit Nobel Aktiengesellschaft
Robic Robic & Associes/associates
LandOfFree
Recovery of heavy-metal oxidation catalyst from the written... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of heavy-metal oxidation catalyst from the written..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of heavy-metal oxidation catalyst from the written... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-327390