Method for synthesizing MTBE (methyl tert-butyl ether) by reaction of mixed C4 with low isobutene content and methanol

• Main Authors: CAI GUOQIU, LI JIAN, LI DAIYU, GUO GE, LI GENZHONG
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2012
• 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 relates to a method for synthesizing MTBE (methyl tert-butyl ether) by the reaction of mixed C4 with a low isobutene content and methanol, which comprises the following steps: 1, pre-etherification reaction: the mixed C4 containing 10-15wt% of isobutene and the methanol are fully mixed by a static mixer according to the molecular ratio of isobutene to methanol of (1:1)-(1:1.1), and then the mixture enters a pre-etherification reactor provided with a fixed bed catalyst bed layer for pre-etherification; 2, etherification reaction: material coming out of the pre-etherification reactor enters an etherification reactor provided with a fixed bed catalyst bed layer for etherification, wherein the conversion rate of the isobutene at an outlet of the etherification reactor is larger than or equal to 90%; and 3, product separation and purification: material coming out of the etherification reactor enters a catalytic distillation tower for further reaction and separation, the upper part of the catalytic di