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US 12,623,986 B2Granted
Synergistic use of phenol purification train in phenol production unit for processing phenolic water from bisphenol-a production unit
AssigneeSabic Global Technologies B.V.
InventorsKadek Sumpena, Lara Galan-Sanchez, Frank Mostert, Kae Shin Wong
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Abstract
Systems and methods for recovering phenol have been disclosed. At least a portion of a wastewater stream from a bisphenol-A production process and a phenol stream that is produced by separating a crude phenol stream from a cumene based phenol production process are concurrently processed in a hydrocarbon removal unit to produce (i) a purified phenol stream comprising 95 to 99.9 wt. % phenol and (ii) an aqueous stream comprising water and byproducts of the phenol production process.
Claims15
A method of recovering phenol, the method comprising:
- concurrently processing, in a hydrocarbon removal unit, (1) a first phenol stream from a phenol production process and (2) at least a portion of a wastewater stream from a bisphenol-A production process under operating conditions sufficient to form:
- (i) a purified phenol stream comprising 95 to 99.9 wt. % phenol and (ii) an aqueous stream comprising water and byproducts of the phenol production process,
- wherein the hydrocarbon removal unit includes a hydro-extraction column configured to perform a liquid-liquid extraction to separate phenol from the byproducts of the phenol production process,
- wherein the hydro-extraction column is operated to provide an extraction temperature of 100 to 250° C. and an extraction pressure of 0.4 to 2 bar.
1 more element
Dependencies are inferred from the claim text.