Method of preparing tetrahydrobicyclo pentadiene by continuous hydrogenation of bicyclopentadiene

Abstract

The continuous dicyclopentadiene hydrogenating process to prepare tetrahydro dicyclopendiene is one continuous catalytic hydrogenation reaction of the mixture of dicyclopentadiene, solvent and hydrogen in a fixed bed catalyst bed. The catalyst includes gamma-Al2O3 as carrier and Pa as active component. The solvent is any one of cyclopentane, n-hexane, cyclohexane, benzene, toluene, cyclohexane, ethanol, methanol, and tertiary butyl alcohol. The reacted liquid is discharged partially and externally circulated partially with the weight ratio being 1 to 5-12, and the externally circulated liquid after being cooled is mixed with dicyclopentadiene material and solvent before being mixed with hydrogen in venturi ejector, atomized into gas-liquid mixture and reacted in the catalyst bed. The catalyst load is 2.0-4.0 / hr accounted in liquid phase material, and the reacted heat is transferred via external circulation. The present invention has high tetrahydro dicyclopendiene.

Description

Technical field [0001] The invention relates to a method for preparing tetrahydrodicyclopentadiene by hydrogenating dicyclopentadiene. Background technique [0002] Tetrahydrodicyclopentadiene is a solid high-energy fuel with excellent performance. Based on it, a series of valuable dicyclopentadiene derivatives with tricyclodecane structure can be prepared. After the isomerization of tetrahydrodicyclopentadiene into hanging tetrahydrodicyclopentadiene, it can be used as an excellent liquid high-energy fuel, which has important uses in the aerospace field; reaction under different isomerization conditions can obtain another A kind of isomer-adamantane, adamantane has a wide range of uses and extremely high added value, so it is known as a new generation of fine chemical raw materials. In the prior art, the method of producing tetrahydrodicyclopentadiene by hydrogenation of dicyclopentadiene has the most industrial application prospects. Since the hydrogenation reaction of dicyclop...

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Problems solved by technology

The method of installing a heat exchange device in the hydrogenation reactor is used to remove the heat of reaction generated during the hydrogenation of (bis)cyclopentadiene. The disadvantage is that the uniformity of cooling in the reactor is limited to a certain extent.

It is speculated that there is still a local excessive temperature rise in the catalyst bed, which causes partial catalyst deactivation, which will reduce the yield of the target product

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