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AssigneePetroChina Company Limited
InventorsLi Siqin, Men Xiaotang, Gensheng Liu, Shunqin Liang, Xiaogong Zhang
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The present invention is related to a selective hydrogenation catalyst for pyrolysis gasoline, wherein the catalyst mainly consists of a support of δ, α mixed alumina covered by palladium as active component, promoter as co-active component and alkali metal and/or alkaline-earth metal. Said palladium is distributed like egg shell on the support surface. Said support has 0.5˜0.9 ml/g of specific pore volume, wherein 40˜200 Å pores account for more than 85% of the total pore volume, preferably 100˜200 Å pore volume accounts for 65%˜80% of the said total pore volume in catalyst support. The specific surface area is about 70˜140 m2/g , and a crystal type in the alumina support is about 0.1˜5% based on the weight percentage of δ, α mixed alumina support, said catalyst contains promoter having selected from a group of the VIB or IB elements in the periodical table of elements. The ratio of promoter and palladium by weight is about 0.2˜2:1. The alkali metal and/or alkaline-earth metal is added in amount of 0.05˜2.0 wt %.
A selective hydrogenation catalyst for pyrolysis gasoline, wherein the catalyst mainly consists of a support of δ, α mixed alumina covered by palladium and alkali metal and/or alkaline-earth metal which are distributed like egg shell on the support surface, and said support having 0.5˜0.9 ml/g of specific pore volume, wherein 40˜200 Å pores account for more than 85% of the total pore volume, the specific surface area being 70˜140 m2/g, and α crystal type in the alumina support being 0.1˜5% based on the weight percentage of δ, α mixed alumina support, said catalyst comprising palladium in amount of 0.05˜0.4 wt %, alkali metal and/or alkaline-earth metal in amount of 0.05˜2.0 wt %.
A selective hydrogenation catalyst for pyrolysis gasoline, wherein the catalyst mainly consists of a support of δ, α mixed alumina covered by palladium, promoter, and alkali metal and/or alkaline-earth metal distributed like egg shell on the support surface, said support having 0.5˜0.9 ml/g of specific pore volume, wherein 40˜200 Å pores account for more than 85% of the total pore volume, the specific surface area being 70˜140 m2/g , and α crystal type in the alumina support being 0.1˜5%, based on the weight percentage of δ, α mixed alumina support, said promoter being selected from a group of the VIB or IB elements in the periodical table of elements, ratio of promoter and palladium by weight being 0.2˜2:1, the alkali metal and/or alkaline-earth metal being added in amount of 0.05˜2.0 wt %.
Dependencies are inferred from the claim text.