• 专利标题:   Preparation of ammonia oxidation catalyst used for synthesizing methacrylonitrile, by respectively dissolving high valence state manganese precursor and low valence state manganese precursor into deionized water and mixing.
  • 专利号:   CN113996288-A
  • 发明人:   LU W, ZHANG Z, HU S, ZHANG D, ZHANG W, LIU K
  • 专利权人:   CHINA WUHUAN ENG CO LTD
  • 国际专利分类:   B01J023/34, B01J023/889, C07C253/26, C07C255/08
  • 专利详细信息:   CN113996288-A 01 Feb 2022 B01J-023/34 202256 Chinese
  • 申请详细信息:   CN113996288-A CN11293440 03 Nov 2021
  • 优先权号:   CN11293440

▎ 摘  要

NOVELTY - An ammonia oxidation catalyst is prepared by adding high valence state manganese precursor into deionized water, stirring and dissolving to obtain solution A, adding low valence state manganese precursor into deionized water, stirring and dissolving to obtain solution B, adding metal precursor into deionized water, stirring and dissolving to obtain solution C, adding solution B into solution A under stirring condition, stirring at room temperature for 0.5-2 hours, continuously adding solution C, continuously stirring at room temperature for 0.5-2 hours to obtain mixed solution, adding alkaline solution, stirring at room temperature for 5-24 hours, transferring to crystallization kettle with PTFE lining for high temperature crystallization, opening kettle, filtering crystallized solution, washing, drying and roasting. USE - The method is used for preparing ammonia oxidation catalyst used for synthesizing methacrylonitrile (claimed). ADVANTAGE - The method has simple technique, mild reaction condition and high product yield. DETAILED DESCRIPTION - An ammonia oxidation catalyst used for synthesizing methacrylonitrile, is prepared by adding high valence state manganese precursor into deionized water, stirring and dissolving to obtain solution A, adding low valence state manganese precursor into deionized water, stirring and dissolving to obtain solution B, adding metal precursor into deionized water, stirring and dissolving to obtain solution C, adding solution B into solution A under stirring condition, stirring at room temperature for 0.5-2 hours, continuously adding solution C, continuously stirring at room temperature for 0.5-2 hours to obtain mixed solution, adding alkaline solution, stirring at room temperature for 5-24 hours, transferring to crystallization kettle with PTFE lining for high temperature crystallization, opening kettle, filtering crystallized solution, washing, drying and roasting. The metal precursor is iron precursor, cerium precursor, nickel precursor, copper precursor or molybdenum precursor. The molar ratio of high valence state manganese precursor, low valence state manganese precursor and metal precursor is 1:0.5-3:0.05-2. The molar ratio of all metal elements and alkali is 1:1-15.