Method for neutralization of carbonyl chloride

Method for neutralization of carbonyl chloride

  • CN 102,702,502 A
  • Filed: 02/08/2008
  • Published: 10/03/2012
  • Est. Priority Date: 02/26/2007
  • Status: Active Application
First Claim
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1. the method for manufacture of a polycarbonate;

  • This method is raw material with the carbonyl chloride;

    This method comprises the neutralizing treatment method of carbonyl chloride;

    The neutralizing treatment method of said carbonyl chloride is through alkali metal hydroxide aqueous solution carbonyl chloride to be carried out neutralizing treatment, and the part of the alkali metal hydroxide aqueous solution after will neutralizing again is discharged to outside the system as alkali wasteliquid, and remainder supplies in above-mentioned neutralizing treatment as the alkali circulation fluid;

    Wherein, be the scope of 1 ~ 5 weight % with the alkaline carbonate concentration adjustment in the alkali metal hydroxide aqueous solution after the neutralizing treatment.

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