TH35387A - Alkyl ester production - Google Patents

Abstract

DC60 (12/03/42) The carbonylation process for unsaturated compounds consists of the following steps: a) Introducing a primary feed containing carbon monoxide and unsaturated compounds into the reactor; b) Introducing a secondary feed containing alkyl alcohols with the formula R-OH, where R is the alkyl group, into the reactor; c) A reaction between the primary and secondary feeds in the reactor, catalysted by a metal-containing carbonylation catalyst. This catalyst accelerates the carbonylation reaction between carbon monoxide and alkenes to obtain a specific alkyl ester product. It is characterized by the addition of another metal species to the carbonylation reaction. A commonly used additional metal species is cobalt. The carbonylation process for unsaturated compounds consists of the following steps: a) Introducing a primary feed containing carbon monoxide and unsaturated compounds into the reactor; b) Introducing a secondary feed containing alkyl alcohols... c) The reaction between the first and second feed currents in the reactor, with a metal-containing carbonylation catalyst, accelerates the carbonylation reaction between carbon monoxide and alkenes to obtain a specific alkyl ester product. The carbonylation reaction is initiated with the addition of another metal species, namely cobalt.

Claims (9)

1. The carbonylation process of unsaturated compounds consists of the following steps: a) Introducing a primary feed containing carbon monoxide and unsaturated compounds into the reactor; b) Introducing a secondary feed containing alkyl alcohols with the formula R-OH, where R is an alkyl group, into the reactor; c) A reaction between the primary and secondary feeds in the reactor, catalysted by a metal-based carbonylation catalyst. This catalyst accelerates the carbonylation reaction between carbon monoxide and alkenes to produce alkyl esters, specifically characterized by the presence of additional metal species in the carbonylation reaction. 2. The process described in claim I, in which the additional metal species shall include cobalt compounds. 3. The process is claimed under claim 2, whereby the cobalt compound is cobalt carbonyl. 4. The procedure provides for one or more of the prior claims in which the metal-containing carbonylation catalyst consists of a combination of palladium (or its compounds) with a phosphorus-containing compound. 5. The procedure claims the right under claim 4, whereby the phosphorus-containing compound is a bindented phosphine ligand of the general formula (R3-C)2-P-L1-X-L2-P-(C-R3)2, where each R independently is a selectable substituted organic suffix where the group is independently linked to a tertiary carbon atom, C, L1, L2 are independently selected substituted linking groups from a small alkylene chain connecting the phosphorus atom by sequence, X and X are bridge groups consisting of selectable substituted aryl units where the phosphorus atom is linked to an adjacent carbon atom. 6. The process is protected under claim 4, whereby the additional metal species, namely cobalt (Co) compounds, are present in quantities that cause the molar ratio of Co:Pd to be at least 0.01:1. 7. The methyl propionate production process consists of the following steps: a) introducing a first-phase feed of carbon monoxide and ethylene in the gaseous phase into the reactor; b) introducing a second-phase feed of methanol into the reactor; c) co-reaction between the first and second feeds in the reactor using a carbonylation catalyst consisting of a combination of palladium (or its compounds) and a phosphorus-containing compound, which accelerates the carbonylation reaction between carbon monoxide and ethylene to obtain a product stream of methyl propionate. This product is specified to contain cobalt in the reaction mixture, with a Co:Pd ratio of at least 0.01:1. 8. The procedure claims the right under claim 7, whereby the phosphorus-containing compound is a bindented phosphine ligand of the general formula (R3-C)2-P-L1-X-L2-P-(C-R3)2, where each R independently is a selectable substituted organic suffix where the group is tertiarily linked to a carbon atom, C, L1, L2 independently are selectable substituted linking groups from small alkylene chains connecting the phosphorus atom by sequence, X, and X are bridge groups consisting of selectable substituted aryl units where the phosphorus atom is linked to an adjacent carbon atom. 9. The process is claimed under claim 7 or 8, whereby the cobalt compound is cobalt carbonyl (Clause 9, 2 pages, 0 images).