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Process for producing raw polycarbonate resin material and producing polycarbonate resin

  • US 6,476,179 B1
  • Filed: 11/13/2001
  • Issued: 11/05/2002
  • Est. Priority Date: 03/10/2000
  • Status: Expired due to Fees
First Claim
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1. A method for producing a starting material for polycarbonate resin production, comprising:

  • preparing a melt of a bisphenol compound in a process of bisphenol compound production; and

    mixing and dissolving the molten bisphenol compound in an aqueous alkali solution at 20 to 80°

    C., thereby preparing a bisphenol starting material for the production of a polycarbonate resin by interfacial polymerization.

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