Patent · US Active

Process for starting up a gas phase oxidation reactor

US9656983B2 · kind B2 · utility

2Cited by

8References

7Claims

0Family size

Assignee

BASF SE

Inventors

Michael Kramer · Muscatine, US
Nico Fischer · Mannheim, DE
Jürgen Zühlke · Speyer, DE
Hans-Martin Allmann · Neunkirchen, DE

Key dates

Filing date	Jun 16, 2014
Grant date	May 23, 2017
Priority date	—
Expiry date	Jun 16, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/313
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing carboxylic acids and/or carboxylic anhydrides by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a catalyst thermostatted by a heat carrier medium, which comprises keeping the temperature of the heat carrier medium constant during the startup of the reactor for at least 24 hours, during which neither the loading of the gas stream with hydrocarbons nor the gas stream volume is increased by more than 3%.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.