公开(公告)号：DE1670083A1

公开(公告)日：1970-07-16

申请号：DE1670083

申请日：1966-05-21

Applicant: BASF AG

Inventor： HARRO PETERSEN DR ,  ERICH HAARER DR ,  GERHARD LEIBNER DR

IPC: C07C273/18 ,  C07D239/10

公开(公告)号：DE1442567A1

公开(公告)日：1968-11-21

申请号：DE1442567

申请日：1964-05-13

Applicant: BASF AG

Inventor： KARL BAER DR ,  HEINRICH SPERBER DR ,  OTTO GOEHRE DR ,  GERHARD LEIBNER DR

IPC: B01J21/04 ,  B01J21/08 ,  B01J23/72 ,  B01J23/882 ,  B01J35/02 ,  B01J35/04 ,  B01J35/08 ,  B01J37/00

Abstract: In Examples 5 and 8, nitrobenzene is hydrogenated to aniline in presence of hollow silica beads impregnated with copper, at temperatures of 280 DEG -290 DEG C.ALSO:Catalysts or catalyst carriers in the form of hollow beads are prepared by spraying a hydrogel containing at least 30% by weight of water and/or a suspension and/or a solution of metal compounds at a pressure of 10 to 100 atmospheres into a tower-shaped vessel, and cocurrently introducing a gas at 300 DEG to 700 DEG C. in amounts of 4 to 18 cubic meters per kgm. of initial material. Hydrogels of silicic acid, alumina, silicates and titania are mentioned, Al, Mg, Zr or Zn salts may be added in preparing a silicic acid hydrogel. The metal compounds may be compounds of Cu, Ag, Zn, Mg, Al, Sn, Pb, V, Cr, Mo, W, Mn, Fe, Ni, Co, Pt or Pd. The hollow beads may be treated with halogen or a phosphoric acid. Examples relate to (1), (5) silica gel; (2), (3) alumina gel; (4) aluminium phosphate; (6) alumina + Co + Mo; (7) Mo + P + V; (8) silica gel + Cu.ALSO:Catalysts or catalyst carriers in the form of hollow beads are prepared by spraying a hydrogel containing at least 30% by weight of water and/or a suspension and/or a solution of metal compounds at a pressure of 10 to 100 atmospheres into a tower-shaped vessel, and cocurrently introducing a gas at 300 DEG to 700 DEG C. in amounts of 4 to 18 cubic meters per kgm of initial material. Hydrogels of silicic acid, alumina, silicates and titania are mentioned. Al, Mg, Zr or Zn salts may be added in preparing a silicic acid hydrogel. The metal compounds may be compounds of Cu, Ag, Zn, Mg, Al, Sn, Pb, V, Cr, Mo, W, Mn, Fe, Ni, Co, Pt or Pd. The hollow beads may be treated with halogen or a phosphoric acid. Examples relate to (1), (5) silica gel (2), (3) alumina gel; (4) aluminium phosphate; (6) alumina +Co+Mo; (7) Mo+P+V; (8) silica gel +Cu. A reactor for hydrogenation of nitrobenzene has diameter to height ratio 1:4 and has twenty two-component nozzles arranged at three levels above the grate at the bottom of the reactor. The upper portion of the vessel is widened to 1 1/2 times and includes a cyclone; reaction gases leaving by the cyclone are recycled via a heat exchanger, condenser, gas-liquid separator, preheater and pump. Cooling tubes are arranged in the catalyst layer at a distance from the wall of the reactor.