公开(公告)号：DE3865597D1

公开(公告)日：1991-11-21

申请号：DE3865597

申请日：1988-08-23

Applicant: BASF AG

Inventor： DANNER ALFRED ,  MUELLER ULRICH ,  UNGER KLAUS PROF DR ,  HOELDERICH WOLFGANG DR

IPC: B01J29/40 ,  C01B39/40 ,  C07C45/00 ,  C07C45/50 ,  C07C45/51 ,  C07C45/58 ,  C07C45/66 ,  B01J29/28

Abstract: In the alkali-free prodn. of large (greater than 5 microns) pentasil crystals for shell and solid catalysts by hydrothermal treatment of SiO2, the novelty is that a SiO2 moulding undergoes hydrothermal treatment at 140-220 deg. C in an alkali-free mixt. of water, an amine and/or tetraalkyl ammonium cpd., and opt. ammonia.

公开(公告)号：DE3728451A1

公开(公告)日：1989-03-09

申请号：DE3728451

申请日：1987-08-26

Applicant: BASF AG

Inventor： DANNER ALFRED ,  MUELLER ULRICH ,  UNGER KLAUS PROF DR ,  HOELDERICH WOLFGANG DR

IPC: B01J29/40 ,  C01B39/40 ,  C07C45/00 ,  C07C45/50 ,  C07C45/51 ,  C07C45/58 ,  C07C45/66

Abstract: Pentasil coated catalysts and fully crystalline catalysts in which the individual pentasil crystals are larger than 5 mu m are prepared by hydrothermal treatment of SiO2 by a process in which the SiO2 moldings are subjected to a hydrothermal treatment at from 140 DEG to 220 DEG C. in an alkali-free mixture of water, an amine and/or a tetraalkylammonium compound, with or without ammonia. The aluminum component for the preparation of an aluminosilicate zeolite can be kneaded into the SiO2 moldings or fed in via the liquid phase during the hydrothermal treatment. The tetraalkylammonium compound used can be a tetra-n-propyl-ammonium salt or hydroxide.