Hydrogenation of isohexide products for improved color

Hydrogenation of isohexide products for improved color

  • CN 104,822,686 A
  • Filed: 10/04/2013
  • Published: 08/05/2015
  • Est. Priority Date: 10/31/2012
  • Status: Active Application
First Claim
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1. , for the preparation of a method for one or more different two dehydration hexan-hexols, the method comprises:

  • Under a kind of acid catalyst exists, make one or more hexitols dewater to form the thick dewatered product mixture of one comprising one or more different two dehydration hexan-hexols;

    This thick dewatered product mixture of further process is to isolate different two dehydration more high purities of at least one of hexan-hexols in this thick dewatered product mixture or one or more fraction of greater concn and to have one or more fractions of more low-purity or concentration;

    AndAt least one in below hydrogenation;

    A) this thick dewatered product mixture;

    B) in a kind of after the neutralization procedure carried out on this thick dewatered product mixture and thick dewatered product mixture;

    C) after the neutralization procedure carried out on this thick dewatered product mixture and further in this and thick dewatered product mixture on the step of carrying out with from this product mixtures after wherein removing ionic species;

    D) one more high purity or greater concn fraction;

    AndE) one more low-purity or concentration fraction,This hydrogenation is by under existing at a kind of hydrogenation catalyst, react with a sources of hydrogen under the condition of effectively carrying out this hydrogenation.

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