公开(公告)号：CA1087210A

公开(公告)日：1980-10-07

申请号：CA294041

申请日：1977-12-29

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  ROSSI PIETRO P ,  GUAITA CESARE ,  L ACQUA VITO

IPC: B01J23/00 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/40 ,  C07C45/57 ,  C07C45/62 ,  C07C47/12 ,  C07C47/20 ,  C07C47/21 ,  C07C67/00

Abstract: The present invention relates to a method for the preparation of saturated and unsaturated .alpha.,.omega.-dialde-hydes containing from 8 to 12 carbon atoms, by catalytic reduction of the corresponding monoozonides of multi-un-saturated cycloolefines. The .alpha.,.omega.-dialdehydes thus obtained also constitute an object of this invention. These compounds serve as intermediates for the synthesis of other products which in turn are compound intermediates, such as the corresponding diacids and diamines, from which the various types of nylon can then be obtained.

公开(公告)号：IT1075949B

公开(公告)日：1985-04-22

申请号：IT3093976

申请日：1976-12-29

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  ROSSI PIETRO PAOLO ,  GUAITA CESARE ,  L ACQUA VITO

IPC: B01J23/00 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/40 ,  C07C45/57 ,  C07C45/62 ,  C07C47/12 ,  C07C47/20 ,  C07C47/21 ,  C07C67/00 ,  C07C

Abstract: There is described a procedure for preparing unsaturated or saturated alpha , omega -dialdehydes, wherein the monoozonide of the corresponding olefine undergoes hydrogenation in a solution and in presence of a catalyst system comprising (A) a noble metal comprising palladium or platinum and carried on a carrier comprising alumina, coal or barium sulphate, and (B) at least one compound of a heavy metal, and wherein, when a saturated dialdehyde is to be prepared, the unsaturated dialdehyde prepared as above undergoes a further catalytic hydrogenation in an organic solvent after removal of component (B) of the said system by means of a treatment with an ion-exchange resin acidified with sulphuric acid, the resin being of such quantity that the acid equivalents of the resin are at least equal to the equivalents of the heavy metal in the component (B) of said catalytic system.

公开(公告)号：DE2758798A1

公开(公告)日：1978-07-06

申请号：DE2758798

申请日：1977-12-29

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  ROSSI PIER RAOLO ,  GUAITA CESARE ,  L ACQUA VITO

IPC: B01J23/00 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/40 ,  C07C45/57 ,  C07C45/62 ,  C07C47/12 ,  C07C47/20 ,  C07C47/21 ,  C07C67/00

Abstract: There is described a procedure for preparing unsaturated or saturated alpha , omega -dialdehydes, wherein the monoozonide of the corresponding olefine undergoes hydrogenation in a solution and in presence of a catalyst system comprising (A) a noble metal comprising palladium or platinum and carried on a carrier comprising alumina, coal or barium sulphate, and (B) at least one compound of a heavy metal, and wherein, when a saturated dialdehyde is to be prepared, the unsaturated dialdehyde prepared as above undergoes a further catalytic hydrogenation in an organic solvent after removal of component (B) of the said system by means of a treatment with an ion-exchange resin acidified with sulphuric acid, the resin being of such quantity that the acid equivalents of the resin are at least equal to the equivalents of the heavy metal in the component (B) of said catalytic system.