公开(公告)号：DE59703013D1

公开(公告)日：2001-03-29

申请号：DE59703013

申请日：1997-12-18

Applicant: DEGUSSA

Inventor： HOFEN WILLI ,  BOECK DR ,  RAUTENBERG DR ,  SAUER DR ,  ARNTZ DR ,  GOEDECKE DR ,  TAUGNER WOLFGANG ,  SONNENSCHEIN DR

IPC: C07C319/02 ,  C07C319/28 ,  C07C321/04

公开(公告)号：DE59703011D1

公开(公告)日：2001-03-29

申请号：DE59703011

申请日：1997-12-09

Applicant: DEGUSSA

Inventor： HOFEN WILLI ,  BOECK DR ,  RAUTENBERG DR ,  SAUER DR ,  ARNTZ DR ,  GOEDECKE DR ,  TAUGNER WOLFGANG ,  SONNENSCHEIN DR

IPC: B01J21/04 ,  B01J23/30 ,  C07B61/00 ,  C07C319/08 ,  C07C321/04

Abstract: A process for the continuous production of methyl-mercaptan (I) comprises (i) reacting a mixture of methanol and hydrogen sulphide (H2S) in the vapour phase at 300-500 degrees C and 5-15 bar on an alumina-based catalyst bed and (ii) separating (I) from the gas mixture obtained by absorption and distillation, with recycling of unreacted methanol and H2S, removal of inert gas and waste water, and replacement of used methanol and H2S. The starting gas mixture is obtained by (a) compressing fresh H2S to an intermediate pressure (P1) with addition of liquid methanol, (b) adding the recycled H2S and compressing the mixture to operating pressure (P2), (c) adding more methanol in the form of vapour to give a compressed mixture with a mol ratio of (H2S):(methanol) = 1.1-3, (d) preheating the gas mixture to 150-200 degrees C, (e) heating to reaction temperature using the heat of reaction released on the catalyst and (f) reaction on the catalyst bed.