P-hydroxybenzene glycine synthesis technology

P-hydroxybenzene glycine synthesis technology

  • CN 101,362,703 B
  • Filed: 08/09/2007
  • Issued: 11/16/2011
  • Est. Priority Date: 08/09/2007
  • Status: Active Grant
First Claim
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1. the synthetic method of a D-pHPG, it is characterized in that, the reaction of under certain proportion, temperature, time, cooking different foods in one pot of phenol and oxoethanoic acid, thionamic acid, catalyzer and water, reaction finishes, and drops into reducing substances, regulate pH value with alkali at last, crystallization, mother liquor separate uses massive laundering, uses organic solvent washing then, obtain the D-pHPG of white powder, described catalyzer is an organic sulfonic acid class catalyzer.

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