公开(公告)号：DK142233C

公开(公告)日：1981-03-02

申请号：DK350975

申请日：1975-08-01

Applicant: SNAMPROGETTI S.P.A.

Inventor： TESEI R ,  FATTORE V ,  BUONOMO F

IPC: B01J21/00 ,  B01J21/12 ,  B01J31/00 ,  B01J31/02 ,  B01J37/02 ,  C07B61/00 ,  C07C1/00 ,  C07C1/20 ,  C07C11/02 ,  C07C13/02 ,  C07C67/00

Abstract: A method is disclosed for preparing tertiary olefins starting from the corresponding tertiary ethers, the improvement consisting in contacting the ether with a catalyst composed by active alumina modified by reaction with a silicon compound selected among those corresponding to the general formula: wherein X,Y,Z and W can be -R, -OR, -Cl, -Br, -SiH3 , -COOR, -SihnOm, R being hydrogen, an alkyl, cycloalkyl, aryl, aralkyl or alkyl-cycloalkyl radical of from 1 to 30 carbon atoms, n and m being integers comprised between 1 and 3. The advantages afforded by the invention are mainly the nearly quantitative yields and the high purity of the end products.