C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
202/62, 260/648
C07C 41/06 (2006.01) C07C 29/86 (2006.01) C07C 41/38 (2006.01) C07C 43/04 (2006.01)
Patent
CA 1253886
ABSTRACT OF THE DISCLOSURE A process for producing methyl tertiary butyl ether is disclosed, comprising reacting isobutylene and methanol using a hydrocarbon mixture of 4 carbon atoms containing isobutylene and methanol as starting materials in a reaction zone containing an acidic ion exchange resin and distilling the resulting reaction mixture in a distillation column connected to the reaction zone to separate methyl tertiary butyl ether from the unreacted hydrocarbon mixture of 4 carbon atoms, wherein a mixture of the hydrocarbon mixture of 4 carbon atoms as a distillate from a top of the distillation column and methanol as a distillate by azeotropy is contacted with water in a second extraction step to wash and extract methanol with water, and the water containing the extracted methanol is then contacted with said hydrocarbon mixture of 4 carbon atoms containing isobutylene which is fed to the reaction zone in a first extraction step in an upstream of the reaction zone to thereby transfer a part or a large portion of the methanol in the methanol- containing water into a hydrocarbon mixture phase by reverse extraction. By the process, methanol in the reaction mixture can be recovered simply and at low cost.
510497
Arakawa Shinichi
Araki Masashi
Okamura Masaaki
Riches Mckenzie & Herbert Llp
Sumitomo Chemical Company Limited
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