Device and method for preparing alkene from methanol and/or dimethyl ether

• Main Authors: LU WEIMIN, NAN HAIMING, WEN YAOSHUN, GONG LEI, WU XIUZHANG, GUAN FENGZHONG
• Format: Patent
• Language: English
• Published: 01.04.2015
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a device and method for preparing alkene from methanol and/or dimethyl ether. The device for preparing alkene from methanol and/or dimethyl ether comprises a reactor, a flow guiding hood, a regenerator, a reactor third-stage cyclone separator and a regenerator third-stage cyclone separator, wherein the reactor comprises a reaction area and an isolated area from bottom to top and further comprises a product gas outlet; the flow guiding hood is arranged in the isolated area; the regenerator comprises a regenerated flue gas outlet; the reactor third-stage cyclone separator comprises a product gas inlet and a catalyst-to-be-regenerated fine powder outlet; the regenerator third-stage cyclone separator comprises a regenerated flue gas inlet and a regenerated catalyst fine powder outlet, the regenerator further comprises a catalyst-to-be-regenerated fine powder inlet, and the catalyst-to-be-regenerated fine powder inlet is connected with the catalyst-to-be-regenerated fine powder outlet through a catalyst-to-be-regenerated fine powder conveying pipeline. The device for preparing alkene from methanol and/or dimethyl ether further comprises an air bubble breaking part, wherein the air bubble breaking part is arranged in the reaction area, and a plurality of breaking holes are formed in the air bubble breaking part. The device and the method have the advantage that the problems that the selectivity of low-carbon alkenes is low and a catalyst runs away and is high in consumption are solved.