Process for the continuous production of Raney catalysts

Details Process for the continuous production of Raney catalysts Process for the continuous production of Raney catalysts

1975-02-27

1976-11-09

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252477Q, B01J 2104

Patent

active

039909964

ABSTRACT:
The invention relates to a continuous process for the preparation of Raney catalysts with controlled particle size, wherein the alloy of the catalytically active metal formed with aluminium and/or zinc is subjected to alkaline leaching, the hydrogen gas formed in this leaching step is separated and removed, the obtained product is washed, and the obtained catalyst with the desired particle size is separated. The improvement in this process comprises leaching the aluminium and/or zinc component of the alloy in a medium constantly kept in a turbulent flow, and removing the solid particles smaller than the desired range during the washing of the catalyst.
The invention relates further to an apparatus for carrying out the above process, comprising a reaction chamber 1 made of one or more reactor(s) and equipped with feeding inlets 2, 3, and 4, a separator 6 equipped with a gas removing outlet 7, a tubing connecting said reaction chamber 1 to said separator 6, a washing-separating-sorting unit 9 equipped with one or more washing liquid introducing inlet(s) 10 and washing liquid removing outlet(s) 11, a tubing 8 connecting said separator 6 to said washing-separating-sorting unit 9, a storing unit 12, and a tubing 13 connecting said washing-separating-sorting unit 9 to said storing unit 12.
According to the invention Raney catalysts with controlled particle size and constant characteristics can be prepared in a continuous operation.

REFERENCES:
patent: 1915473 (1933-06-01), Raney
patent: 2608469 (1952-08-01), McMaster
patent: 3139408 (1964-06-01), Tumer et al.
patent: 3235513 (1966-02-01), Jung et al.
patent: 3691093 (1972-09-01), Frank et al.
patent: 3809658 (1974-05-01), Csuros et al.

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