Treatment of bisphenol-A residue streams
AssigneeBadger Licensing LLC
InventorDavid P. Palmer
Life of this patent
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Abstract
In a method of reducing the viscosity of a residue stream from the production of bisphenol-A, the residue stream is combined with at least one of (a) a bottoms stream comprising polyalkylaromatic compounds and remaining after the fractionation of an effluent from an aromatics alkylation process to remove monoalkylaromatic compounds, (b) a stream containing at least 90 wt % phenol and (c) a mixture of phenol and said bottoms stream (a) to produce a combined stream.
Claims25
A method of reducing the viscosity of a residue stream from the production of bisphenol-A, the method comprising combining the residue stream with a bottoms stream (a) comprising polyalkylaromatic compounds remaining after the fractionation of an effluent from an aromatics alkylation process to remove monoalkylaromatic compounds, and optionally a stream (b) containing at least 90 wt % phenol to produce a combined stream.
A method of producing bisphenol-A, the method comprising:
- (a) condensing acetone with a molar excess of phenol in the presence of a catalyst under conditions to produce a product stream comprising bisphenol-A isomers, unreacted phenol, trisphenols, hydroxyphenyl chromans, isopropenyl phenol dimers, and indanes;
- (b) recovering bisphenol-A and unreacted phenol from said effluent stream to leave a residue stream comprising bisphenol-A isomers, unrecovered phenol, trisphenols, hydroxyphenyl chromans, isopropenyl phenol dimers, indanes and other heavier aromatic compounds;
- and
- (c) combining at least part of the residue stream with a bottoms stream (a) comprising polyalkylaromatic compounds remaining after the fractionation of an effluent from an aromatics alkylation process to remove monoalkylaromatic compounds, and optionally a stream (b) containing at least 90 wt % phenol to produce a combined stream.
Dependencies are inferred from the claim text.