The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Jun. 12, 2001
Makoto Inomata, Oarai-machi, JP;
Akira Higashi, Yokohama, JP;
Yoshiteru Makino, Yokohama, JP;
Yoshinori Mashiko, Yokohama, JP;
Makoto Inomata, Oarai-machi, JP;
Akira Higashi, Yokohama, JP;
Yoshiteru Makino, Yokohama, JP;
Yoshinori Mashiko, Yokohama, JP;
JGC Corporation, Tokyo, JP;
Abstract
A process for the preparation of lower olefins which comprises the step (A) of separating in a high-pressure state a mixed fluid (I) containing dimethyl ether (DME) and methanol at a specified ratio into a gas component (II) and a liquid component (III), separating the gas component (II) into an off-gas and DME, and then making this DME join the liquid component (III) to obtain a liquid component (IV) containing DME and methanol at a specified ratio and the step (B) of subjecting the liquid component (IV) to depressurization and then introducing it into a reactor for the preparation of olefins to form a lower olefin fraction (V). Lower olefins are prepared from a mixed fluid (I) containing DME and methanol at a specified ratio.