Processing method for mother solution and solium sulfite solution in naphthol production

Processing method for mother solution and solium sulfite solution in naphthol production

CN
  • CN 1,858,010 A
  • Filed: 04/17/2006
  • Published: 11/08/2006
  • Est. Priority Date: 04/17/2006
  • Status: Active Application
First Claim
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1. The invention relates to a method for treating mother liquor and sodium sulfite solution in naphthol production, wherein the naphthol production comprises the technical processes of sulfonation, neutralization, liquid-solid separation, alkali fusion, acidification, boiling separation, drying distillation and crystallization, and the method is characterized in that:

  • A. in the dilution process after the alkali fusion process, the mother liquor after neutralization and liquid-solid separation is used as a diluent, or a sodium sulfite solution after primary boiling separation and cooling pressure filtration is used as the diluent, or secondary boiling washing water is used as the diluent;

    B. a filtering and washing process is arranged between the diluting and acidifying processes.

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