Method for preparing cyclohexanone-oxime in solvent-free mode

Method for preparing cyclohexanone-oxime in solvent-free mode

  • CN 104,926,689 A
  • Filed: 06/12/2015
  • Published: 09/23/2015
  • Est. Priority Date: 06/12/2015
  • Status: Active Application
First Claim
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1. a method for solvent-free preparation cyclohexanone-oxime, is characterized in that pimelinketone to mix with ammonia and hydrogen peroxide, carries out oximation reaction and obtain cyclohexanone-oxime under the katalysis of HTS, and concrete preparation comprises the following steps:

  • The preparation of a, reaction systemBe 1;

    0.01 ~ 1 be uniformly mixed into reaction system in mass ratio by pimelinketone and catalyzer, described catalyzer is HTS or the molectron containing HTS;

    B, oximation reactionDrip or once add hydrogen peroxide when above-mentioned reaction system being heated to 50 ~ 90 DEG C, and pass into the oximation reaction that ammonia or liquefied ammonia carry out normal pressure, its reaction times is 1 ~ 3 hour, and the mass ratio of described pimelinketone and hydrogen peroxide and ammonia is 1;

    1.0 ~ 3.0;

    0.17 ~ 0.4;

    The separation of c, productAfter above-mentioned oximation reaction terminates, its reaction solution is separated product is cyclohexanone-oxime through A or B method, and described A method leaches catalyzer by reaction solution, and it is cyclohexanone-oxime that the crystal of separating out after its filtrate condensation obtains product after drying;

    Described A method leaches catalyzer and crystallisate by after reaction solution condensation, and again filter after much filtrate being heated, it is cyclohexanone-oxime that its filtrate obtains product after condensation-crystallization, drying.

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