Title:
OPERATING METHOD AND APPARATUS FOR VACUUM PIPE STILL
Document Type and Number:
Japanese Patent JPS5490205
Kind Code:
A
Abstract:
The invention provides an improvement in the conventional operation of a vacuum pipestill, whereby when used with, for example, an atmospheric residuum either (a) conventional yields are obtainable with less stripping steam utilization, or (b) a deeper cut into the residuum is obtainable for conventional steam utilization. Some of the gaseous mixture normally withdrawn from the top of the vacuum pipestill for washing and removal is fed into compression and recycle means and recycled to the stripping zone of the pipestill to replace, or augment, the conventionally used stripping steam.
Inventors:
KURAUSU ARUNO PUFUAIFUERU
Application Number:
JP14862978A
Publication Date:
July 17, 1979
Filing Date:
November 29, 1978
Export Citation:
Assignee:
EXXON RESEARCH ENGINEERING CO
International Classes:
C01G7/00; C10G7/00; C10G7/06; B01D3/10; (IPC1-7): B01D3/04; B01D3/10; C01G7/00
Domestic Patent References:
| JPS5148483A | 1976-04-26 |