Caustic tower trap for acetaldehyde

Details Caustic tower trap for acetaldehyde Caustic tower trap for acetaldehyde

1996-08-12

1998-02-03

Caldarola, Glenn

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With prevention or removal of deleterious carbon...

208 48AA, 585950, C10G 912

Patent

active

057140553

ABSTRACT:
A method of inhibiting the formation of fouling deposits occurring on the surfaces of an alkaline scrubber used to wash acid gases generated during the manufacture of olefins, which deposits are formed during the scrubbing of pyrolytically produced hydrocarbons contaminated with oxygen-containing compounds with a caustic solution having a pH>7, which comprises adding an effective depositing-inhibiting amount of a caustic solution-soluble substituted aromatic amine selected from the group consisting of: 2-aminophenol, 4-aminophenol, 4-aminobenzenesulfonic acid and salts thereof, 4-amino-o-cresol, 3-aminophenol, 2-aminobenzoic acid and salts thereof, 3-aminobenzoic acid and salts thereof, and 4-aminobenzoic acid and salts thereof to the caustic solution. A preferred substituted aromatic amine is the sodium salt of 4-amino- benzenesulfonic acid in aqueous solution.

REFERENCES:
patent: 3328284 (1967-06-01), Godar
patent: 4673489 (1987-06-01), Roling
patent: 4775458 (1988-10-01), Forester
patent: 4952301 (1990-08-01), Awbrey
patent: 5160425 (1992-11-01), Lewis
patent: 5264114 (1993-11-01), Dunbar
patent: 5288394 (1994-02-01), Lewis et al.

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