发明授权
US07985705B2 Three-layered, four-layered, or five-layered catalyst systems for producing phthalic anhydride 有权
用于生产邻苯二甲酸酐的三层,四层或五层催化剂体系

Three-layered, four-layered, or five-layered catalyst systems for producing phthalic anhydride
摘要:
Catalyst systems for preparing phthalic anhydride by means of gas-phase oxidation of o-xylene and/or naphthalene, and a process for preparing phthalic anhydride using the catalyst systems.
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