公开(公告)号：DK142409C

公开(公告)日：1981-03-30

申请号：DK351275

申请日：1975-08-01

Applicant: SNAMPROGETTI S.P.A.

Inventor： MANARA G ,  FATTORE V ,  NOTARI B

IPC: C10G35/06 ,  B01J21/00 ,  B01J21/12 ,  B01J23/00 ,  B01J31/00 ,  B01J31/02 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  C07B61/00 ,  C07C1/00 ,  C07C5/22 ,  C07C5/23 ,  C07C5/27 ,  C07C11/02 ,  C07C67/00

Abstract: 1505404 Isomerizing alkenes SNAMPROGETTI SpA 17 July 1975 [2 Aug 1974] 30141/75 Heading C5E Alkenes are isomerized with a silica-surface - modified alumina catalyst which has been produced by impregnating alumina with an organosilicon compound containing radicals, at least one of which is other than OH, pyrolysably bound to silicon, and subjecting the treated alumina (substantially free from unreacted impregnating material and any volatile reaction products) to calcining. The alumina may contain 0À5-12 wt. per cent of surface-modifying silica. Preferred organosilicon compounds are esters of orthosilicic acid. Examples describe the isomerization of butenes and pentenes.

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.