Patent · US Expired

Apparatus for carrying out polymerizations from the gas phase

US4212847A · kind A · utility

9Cited by

8References

4Claims

0Family size

Assignee

BASF SE

Inventors

Dieter Volmer · Wesseling, DE
Juergen Schwind · Brühl, DE
Erich Kolk · Bad Dürkheim, DE
Hans Frielingsdorf · Bad Dürkheim, DE

Key dates

Filing date	Mar 22, 1978
Grant date	Jul 15, 1980
Priority date	—
Expiry date	Mar 22, 1998

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/185
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An apparatus for carrying out polymerizations from the gas phase comprising a sealable reactor with a spiral stirrer which is rotatable in the reactor about a vertical axis to generate circulatory streams of the materials employed, in which the stirrer rotating within the reactor is surmounted by a stirrer rod, which extends upward beyond the uppermost flight circle of the stirrer and is attached to the stirrer at a certain distance from the axis of the stirrer, the distance of the side face of the stirrer rod from the reactor wall is at least 10 mm, and the surface of revolution of the moving rod matches the contour of the reactor in this zone.

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