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Separation of 1-pentanol from cyclopentanol by extractive distillation

  • US 5,320,715 A
  • Filed: 01/14/1994
  • Issued: 06/14/1994
  • Est. Priority Date: 01/14/1994
  • Status: Expired due to Fees
First Claim
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1. A method for recovering 1-pentanol from a mixture of 1-pentanol and cyclopentanol which comprises distilling a mixture of 1-pentanol and cyclopentanol in the presence of about one part of an extractive agent per part of 1-pentanol - cyclopentanol mixture, recovering the 1-pentanol as overhead product and obtaining the cyclopentanol and the extractive agent from the stillpot, wherein said extractive agent consists of one material selected from the group consisting of ethylene glycol, propylene glycol, 1,2-butanediol, 1,3-butanediol, 1,4butanediol, 2,3-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol 400, 1,2,6-trihydroxyhexane, glycerine, sulfolane and dimethylsulfoxide.

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