Low energy consumption propylene production technology

• Main Authors: JIANG YUNTAO, WANG JINGDAI, WANG XIEQING, LU FEIPENG, YANG YONGRONG, YAN LIXIA, LIAO ZUWEI, FENG XIANG, JIANG BINBO
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2013
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; 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; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention discloses a low energy consumption propylene production technology, which comprises the following steps of (1) after mixing raw material methyl alcohol and diluent gas, carrying out etherification reaction, after mixing the primary product and the stream of the diluent gas with steam water and refined hydrocarbon and heat exchanging, preparing olefin so as to obtain a secondary product; (2) separating the secondary product so as to obtain propylene, ethylene, C1-C3 alkane, C4-C6 components comprising olefin and alkane, C7 and heavy components comprising arene; and (3) taking the vaporized purified water obtained through separation as part of the steam water and circulating to step (1), taking the products of ethylene, C1-C2 alkane, C4-C6 as the refined hydrocarbon, and returning to an OTP (one time programmable) reactor for preparing olefin continuously. According to the preparation method, the problem that high propylene yield needs a large amount of steam water and the problem of selectivity i