Title:
MANUFACTURE OF OLEFINS
Document Type and Number:
Japanese Patent JPS5959788
Kind Code:
A
Abstract:
Low-molecular weight olefins from heavy hydrocarbons are obtained with a hydrogenating pretreatment and a subsequent thermal cracking of at least a portion of the hydrogenated product. In the first stage, the polyaromatic content of a first hydrocarbon fraction high in polyaromatic compounds, e.g., a vacuum gas oil, is selectively degraded with a zeolitic hydrotreating catalyst, and in a second stage the resultant hydrocarbons are refined with a non-zeolitic hydrotreating catalyst in admixture with a second heavy hydrocarbon fraction low in polyaromatic compounds, e.g., and atmospheric gas oil. This two-stage process permits the utilization of lower operating pressures as compared to the separate treatment of the heavy hydrocarbon fractions.
Inventors:
HAINTSU CHINMERUMAN
Application Number:
JP15656683A
Publication Date:
April 05, 1984
Filing Date:
August 29, 1983
Export Citation:
Assignee:
LINDE AG
International Classes:
C07C1/00; C07C4/02; C07C11/02; C10G65/12; C07C67/00; C10G65/08; C10G69/06; (IPC1-7): C07C4/02; C07C11/02; C10G65/12
Attorney, Agent or Firm:
Watanabe Michitaka