Regeneration method of catalyst for vinyl acetate

Regeneration method of catalyst for vinyl acetate

  • CN 103,934,037 A
  • Filed: 01/23/2013
  • Published: 07/23/2014
  • Est. Priority Date: 01/23/2013
  • Status: Active Application
First Claim
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1. the renovation process of vinyl acetate catalyst, the carrier of described decaying catalyst is SiO 2, Al 2o 3or its mixture, described carrier loaded have Metal Palladium, metallic gold, alkali metal acetate and acetic acid, wherein in decaying catalyst, the content of palladium is that the content of 0.9 ~ 11g/L, gold is that the content of 0.08 ~ 8g/L, alkali metal acetate is 7 ~ 80g/L, content 2.0 ~ the 10g/L of acetic acid, the porpezite crystal grain of described decaying catalyst is 8 ~ 10nm, comprises the following steps:

  • A) process described decaying catalyst taking the aqueous solution containing alkali compounds as wash liquid;

    B) at oxygenous atmosphere and 150 ~ 650 DEG C, process 2 ~ 10 hr, in wherein said oxygenous atmosphere in percent by volume oxygenous 5 ~ 100%;

    C) reduce with reducing agent;

    D) the dipping alkali metal acetate aqueous solution, is dried and obtains regenerated catalyst, and wherein in regenerated catalyst, alkali metal acetate content is 10 ~ 90g/L;

    Described alkali compounds is at least one in alkali metal weak or alkali metal hydroxide.

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