Process for recovering useful components from waste gas of methi

Details Process for recovering useful components from waste gas of methi Process for recovering useful components from waste gas of methi

1980-01-18

1982-03-09

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

C07C149247

Patent

active

043190448

ABSTRACT:
In the methionine synthesis involving a hydantoin reaction in its steps, a process for recovering and reusing the useful components in the waste gas by (1) washing the waste gas generated in the hydantoin synthesis reactor with methylmercaptopropionaldehyde (hereinafter referred to as MA) and returning the washing into the MA synthesis reactor system and/or (2) washing the waste gas with an aqueous solution of a compound substantially constituted of ammonia and carbon dioxide, i.e. the starting material of hydantoin synthesis, or with the liquid reaction mixture of methionine containing hydantoin (hereinafter referred to as MH) and returning the washing into the MH synthesis reactor system.

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