Zone catalyst loading and processes for the acetoxylation of olefins using the same
AssigneeCelanese International Corporation
InventorsSteve R. Alexander, Laiyuan Chen, Stacey Somerville, Sean Mueller
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a process for the acetoxylation of olefins in a gaseous reaction stream containing an olefin, acetic acid, and an oxygen-containing gas. The process comprises passing a reaction gas over at least two fixed catalyst zones, arranged in series. The catalyst zones are located in one or more reaction tubes arranged in parallel. The at least two fixed catalyst zones comprise an inlet catalyst zone comprising an inlet catalyst and an outlet catalyst zone comprising an outlet catalyst and certain conditions may be met for the inlet and outlet catalyst.
Claims23
A process for the acetoxylation of an olefin in a gaseous reaction stream containing an olefin, acetic acid, and an oxygen-containing gas, the process comprising:
- passing a reaction gas over at least two fixed catalyst zones, arranged in series, to form an acetoxylated olefin,
- wherein the catalyst zones are located in one or more reaction tubes arranged in parallel;
- wherein the at least two fixed catalyst zones comprise an inlet catalyst zone comprising an inlet catalyst and an outlet catalyst zone comprising an outlet catalyst;
- wherein the inlet catalyst zone comprises from 5 to 70% of the catalyst loading and the outlet catalyst zone comprises from 30 to 95% of the catalyst loading, based on 100% by weight of catalyst loading of all catalyst zones;
- and wherein at least one of the following conditions is met:
- (a) the inlet catalyst comprises greater than 7 g/L Pd;
- (b) the outlet catalyst comprises greater than 8.3 g/L Pd;
- and/or
- (c) the outlet catalyst comprises from 7.5 to 8.1 g/L Pd.
17-18. (canceled)
(canceled)
22-23. (canceled)
Dependencies are inferred from the claim text.