| abstract |
The present invention is a hydrogenation method for producing high trans / trans isomer ratio of hydrogenated bisphenol (Hydrogenated Bisphenol A), which utilizes a reaction tank equipped with a hollow shaft stirring device with extraction, exhaust gas and stirring capabilities , Evenly disperse hydrogen into the reaction liquid, and use ruthenium-alumina (Ru / Al 2 O 3 ) hydrogenation catalyst to produce a hydrogenated type of propylene glycol product with high trans / trans isomer ratio. The ruthenium used The precious metal hydrogenation catalyst has the advantages of high activity, high selectivity, reusability, and low price compared with other precious metals (such as palladium and rhodium). With the use of a hollow shaft stirring device, the amount of hydrogenation catalyst can be further reduced , With extremely high economic benefits. |