Process for production of catalyst for use in production of methacrylic acid, and process for production of methacrylic acid

Process for production of catalyst for use in production of methacrylic acid, and process for production of methacrylic acid

  • CN 102,639,238 A
  • Filed: 11/29/2010
  • Published: 08/15/2012
  • Est. Priority Date: 11/30/2009
  • Status: Active Application
First Claim
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1. the manufacturing approach of a catalyst;

  • Be used to make with the heteropolyacid salt is the catalyst of active component;

    Said heteropolyacid salt is to be selected from molybdenum, phosphorus, vanadium and copper and alkali metal, alkaline-earth metal and the ammonia more than one as neccessary composition, and said manufacturing approach is characterised in thatPossess following operation;

    (A) slurry that the compound that will contain said neccessary composition and water is mixed carry out drying and obtain dry powder operation,(B) importing have in the calciner plant of the controlled gas of absolute humidity the precalcining operation of said dry powder being calcined and obtaining the catalyst component powder,(C) in the controlled atmosphere gas of absolute humidity to said catalyst component powder carry out moulding the shaping of catalyst operation and(D) in importing the calcination process of in the calciner plant of the controlled gas of absolute humidity the catalyst after the said moulding being calcined is arranged, andThe absolute humidity of the gas that imports in the precalcining operation of said (B) is 0.007 ~ 0.025kg/kgDA,The absolute humidity of the atmosphere gas of the shaping of catalyst operation of said (C) is 0.007 ~ 0.025kg/kgDA,The absolute humidity of the gas that imports in the calcination process of said (D) is 0.007 ~ 0.025kg/kgDA.

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