Research and Development of a Fluidized Bed Catalyst for Production of Phthalic Anhydride and Commercialization Thereof. (Part 1). Preparation of Silica-supported V2O5 Catalyst Having Good Attrition Resistance and Catalytic Properties.

ASAMI Yukio, IWASAKI Mamoru, AONO Toshinao, HIROOKA Noboru, NOBUSAWA Tatsuya, FUJII Susumu

doi:10.1627/jpi1958.43.189

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無水フタル酸製造用流動層触媒の開発と実用化　（第１報）　　耐摩耗性シリカ担持Ｖ２Ｏ５系触媒の製造法と反応特性
ムスイフタルサンセイゾウヨウリュウドウソウショクバイノカイハツトジツヨウカダイ1ポウタイマモウセイシリカタンジ V2O5ケイショクバイノセイゾウホウトハンノウトクセイ
Preparation of Silica-supported V2O5 Catalyst Having Good Attrition Resistance and Catalytic Properties
耐摩耗性シリカ担持V2O5系触媒の製造法と反応特性

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Abstract

Kawasaki Steel Corp. has produced approximately 30, 000ton/yr of phthalic anhydride from coal-tar naphthalene by catalytic oxidation over silica-supported V₂O₅ catalyst (Davison #906: V₂O₅-K₂SO₄-SO₃/SiO₂) in a fluidized bed reactor, since 1979. The performance of catalyst licensed by Badger Corp., however, was not quite suitable for fluidized bed process because of its physical properties, i.e., low attrition resistance, poor fluidization and uneven dispersion of active components in catalyst particles. The purpose of present study is to improve performance of the catalyst in the fluidized bed reactor. Previously, particles-defects were found with impregnating method of preparation using pulverized silica particles as support. Recently, a new spray-drying method of preparation was found, using fine silica sols of sizes from 5 to 12nm in diameter, which eases to obtain micro-spherical catalyst having uniform quality and ideal operability. A commercial plant, using the said developed catalyst for oxidation of naphthalene, was found to be operating ideally with catalysts performing effectively.

Journal

Journal of The Japan Petroleum Institute

Journal of The Japan Petroleum Institute 43 (3), 189-197, 2000

The Japan Petroleum Institute

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