Method for pruification of alpha-hydroxy acid on industrial scale

Method for pruification of alpha-hydroxy acid on industrial scale

  • CN 100,418,941 C
  • Filed: 09/14/2001
  • Issued: 09/17/2008
  • Est. Priority Date: 09/15/2000
  • Status: Active Grant
First Claim
Patent Images

1. the method for the alpha hydroxy acid of purification of fermentation preparation on technical scale, described alpha hydroxy acid is lactic acid or oxyacetic acid, wherein color is not more than 10, the alpha hydroxy acid of 000 APHA unit carries out at least two makes water as solvent or do not use the crystallisation step of any solvent, and crystallisation step carries out in equipment of crystallisation by cooling, melting crystal device, evaporative crystallization device and/or adiabatic crystallization apparatus.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×