Patent · US Active

Process for the preparation of propylene oxide

US10544115B2 · kind B2 · utility

1Cited by

1References

20Claims

0Family size

Assignee

BASF SE

Inventors

Dominic RIEDEL · Ludwigshafen, DE
Joaquim Henrique Teles · Waldsee, DE
Heiner Schelling · Ludwigshafen, DE
Ulrike Wegerle · Worms, DE
Ulrich Mueller · Hamburg, DE
Andrei-Nicolae Parvulescu · Ludwigshafen am Rhein, DE
Jochen Mannweiler · Ludwigshafen, DE
Timo HENN · Ludwigshafen, DE
Thomas Luederitz · Ludwigshafen, DE
Nicolai Tonio Woerz · Darmstadt, DE
Christian Mueller · Wiesbaden, DE
Markus Weber · Langenfeld, DE
Daniel Urbanczyk · Ludwigshafen, DE

Key dates

Filing date	Feb 16, 2017
Grant date	Jan 28, 2020
Priority date	—
Expiry date	Feb 16, 2037

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/52
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A continuous process for the preparation of propylene oxide, comprising a start-up stage and normal run stage, wherein the normal run stage comprises (i) continuously providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, a formate salt, water and optionally propane, wherein in the liquid feed stream, the molar amount of the formate salt relative to the molar amount of hydrogen peroxide at a given point of time during the normal run stage is aN(Fo/H2O2); (ii) continuously passing the liquid feed stream provided in (i) into an epoxidation zone comprising a catalyst comprising a titanium zeolite having framework type MWW, and subjecting the liquid feed stream to epoxidation reaction conditions in the epoxidation zone, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the formate salt, optionally propene, and optionally propane; (iii) continuously removing an effluent stream from the epoxidation zone, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the formate salt, optionally propene, and optionally propane; wherein the normal run stage is characterized in an average rate of change of …

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