Synthesis of glycidyl ethers of polyhydric phenols

• US 3,121,727 A
• Filed: 10/17/1960
• Issued: 02/18/1964
• Est. Priority Date: 10/17/1960
• Status: Expired due to Term

• Current Assignee: Dwight M. Sheets, John J. Jr. Baliker, Kenneth B. Cofer, Leonard H. Griffin
• Original Assignee: Dwight M. Sheets, John J. Jr. Baliker, Kenneth B. Cofer, Leonard H. Griffin
• Inventors: Baliker, John J. Jr., Cofer, Kenneth B., Griffin, Leonard H., Sheets, Dwight M.
• Application Number:
  US04/062,858
• Time in Patent Office: 1,219 Days
• US Class Current: 549/517
• CPC Class Codes: C07D 303/24 with polyhydroxy compounds
• CPC Class Codes: C08G 59/063 with epihalohydrins

Claims

1. A PROCESS FOR THE PRODUCTION OF DIGLYCIDYL ETHER OF 2,2-BIS(4-HYDROXYPHENYL)PROPANE WHICH COMPRISES (A) ADDING A CONCENTRATED AQUEOUS SOLUTION OF SODIUM HYDROXIDE TO AN AGITATED SOLUTION CONTAINING (A) SAID PHENOL, (B) FROM ABOUT 6 TO ABOUT 16 MOLS OF EPICHLOROHYDRIN PER MOL OF PHENOL, (C) FROM 1 TO 10 PERCENT BY WEIGHT OF WATER, AND (D) A SUFFICIENT AMOUNT OF METHANOL IN THE RANGE FROM 0.1 TO 0.5 PART BY WEIGHT PER PART OF EPICHLOROHYDRIN, TO MAINTAIN A SINGLE LIQUID PHASE THROUGHOUT THE REACTION;

(B) REMOVING HEAT OF REACTION BY REMOVING A VAPOR STREAM FROM THE REACTION MIXTURE, CONDENSING SAID VAPOR STREAM, AND RETURNING THE CONDENSATE TO THE REACTOR;

(C) THE RATE OF ADDING SAID SOLUTION HYDROXIDE BEING SUCH THAT THE CONDENSATION REACTION BETWEEN SAID PHENOL AND EPICHLOROPHYDRIN IS COMPLETE WITHIN 30 MINUTES, AND (D) THE RATE OF SAID HEAT REMOVAL BEING SUCH THAT THE HEAT OF REACTION IS REMOVED FROM THE REACTION ZONE WHILE MAINTAINING THE REACTION MIXING AT ITS BOILING POINT, AND (E) RECOVERING A REACTION PRODUCT CHARACTERIZED BY A WEIGHT PER EPOXIDE GROUP OF ABOUT 180 TO 184 AND A TOTAL CHLORINE CONTENT OF NO MORE THAN ABOUT 0.2% BY WEIGHT.