Production of bisphenol from resinous by-products

• US 3,290,390 A
• Filed: 12/31/1962
• Issued: 12/06/1966
• Est. Priority Date: 12/31/1962
• Status: Expired due to Term

• Current Assignee: Occidental Chemical Corporation (Occidental Petroleum Corporation)
• Original Assignee: Ellis I. Lichtblau, Sol J. Lederman, Walter H. Prahl
• Inventors: Prahl, Walter H., Lederman, Sol J., Lichtblau, Ellis I.
• Application Number:
  US04/248,278
• Time in Patent Office: 1,436 Days
• US Class Current: 568/724
• CPC Class Codes: C07C 37/20 using aldehydes or ketones
• CPC Class Codes: C07C 37/48 by exchange of hydrocarbon groups, which may be substituted, from the same of other compounds, e.g. transalkylation
• CPC Class Codes: C07C 37/72 by liquid-liquid treatment
• CPC Class Codes: C07C 37/74 by distillation
• CPC Class Codes: C07C 39/16 Bis-(hydroxyphenyl) alkanes; Tris-(hydroxyphenyl)alkanes

Claims

1. THE PROCESS WHICH INCLUDES THE STEPS OF (1) REACTING PHENOL AND ACETONE IN THE PRESENCE OF A ACIDIC CONDENSING AGENT TO PRODUCE A REACTION PRODUCT COMPRISING 2,2-(4,4'"'"''"'"' - DIHYDROXYDIPHENYL)PROPANE, (2) DISTILLING THE MORE VOLATILE MATERIALS FROM THE 2,2-(4,4'"'"''"'"'-DIHYDROXYDIPHENYL)PROPANE, (3) VACUUM DISTILLING THE RESULTING 2,2(4,4'"'"''"'"'-DIHYDROXYDIPHENYL)PROPANE FROM MATERIALS LESS VOLATILE IN IT, TO OBTAIN A DISTILLATE OF 2,2-(4,4'"'"''"'"'-DIHYDROXYDIPHENYL)PROPANE AND A RESINOUS BY-PRODUCT MATERIAL, (4) SEPARATING THE SAID RESINOUS BY-PRODUCT MATERIAL FROM THE DISTILLED 2,2-(4,4'"'"''"'"'-DIHYDROXYDIPHENYL) PROPANE BY MEANS OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, XYLENE, METHYLENE CHLORIDE, ETHYLENE DICHLORIDE, AND TRICHLOROETHYLENE, WHEREBY SUBSTANTIALLY PURE 2,2(4'"'"''"'"'4'"'"''"'"'-DIHYDOXYDIPHENYL) PROPANE AND A SOLVENT SOLUTION OF RESINOUS BY-PRODUCT MATERIAL ARE PRODUCED, (5) REMOVING SUBSTANTIALLY ALL THE SOLVENT FROM THE SAID RESINOUS BY-PRODUCT MATERIAL (6) SEPARATELY TREATING THE RESULTANT RESINOUS BY-PRODUCT MATERIAL WITH PHENOL IN THE PRESENCE OF AN ACIDIC CONDENSING AGENT AT AN ELEVATED TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE TO ABOUT 150 DEGREES CENTRIGRADE TO PRODUCE A REACTION PRODUCT COMPRISING ADDITIONAL 2,2-(4,4'"'"''"'"'-DIHYDROXYDIPHENYL)PROPANE, AND (7) RECOVERING THE 2,2-(4,4'"'"''"'"'-DIHYDROXYDIPHENYL)PROPANE PRODUCED IN STEP (6).