Process and apparatus for the synthesis of butynediol

Details Process and apparatus for the synthesis of butynediol Process and apparatus for the synthesis of butynediol

1993-12-20

1995-08-22

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568856, C07C 3118

Patent

active

054441692

ABSTRACT:
The conversion of formaldehyde and acetylene in the presence of a suspension catalyst to butynediol is usually performed in a cascade of reactors, wherein the separation of the catalyst from the product solution takes place per individual reactor. This can be performed by filters installed in the reactor or by suitable filter apparatuses outside the reactor. A part of the catalyst present in the reactors can be drawn off and replaced by regenerated and/or fresh catalyst. The catalyst drawn off from the reactors can advantageously be fed to a regeneration. The replacement of the catalyst in the reactor can take place discontinuously or continuously. In the reactors of the cascade, a catalyst amount of 50-200 g, preferably of 75-125 g, per liter of reaction solution is used.

REFERENCES:
patent: 3154589 (1964-10-01), Moore, Jr.
patent: 4093668 (1978-06-01), Reiss et al.
patent: 4117248 (1986-02-01), Prater et al.
Derwent World Patents Index, Abstract of DE 28 14 447. Dec. 1993.

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