The Study Of Catalysis And Hydrogenation To NeoPentyl Glyeol

NeoPentyl glyeol (NPG), which has used as the bulk additive for advanced paint and dope, has played an increasing role in improving and increasing the ability of product. Furthermore, with the enhanced awareness of environmental protection, there is the r-apid evelopment on environment-friendly dope, so NPG will be more and more used and possess of good market prospects. As the sodium production process from product quality, economic indicators to therequirements of environmental protection can not be compared with the con-densationhydrogenation process, Condensation Hydrogenation will gradually replace the sodiumFranceb ecame the main method of production of NPG. Both the Easman technic and Basf technic repr esent the most advanced process. This paper explore the total condensation-hydrogenati on technology, which includes technic condition of HPA synthesis by condensation met hod, hydrogenation catalyst and hydrogenation condition during HPA hydrogenated to NPG, in oder to gain a advanced thenic synthesis of NPG.This paper studies the synthesis conditions of Hydroxypivalaldehyde (HPA) and th e hydrogenation process of HPA in experiment, and gains optimum synthsis condition: (a) that the material molar ratio(Isobutyraldehyde, Formaldehydeand Triethylamine) is 1.1:1.0:0.03-0.04; (b) that two reactor are involved tandem reactions. There is the 1 ow temperature reaction at 64℃in the first reactor, there is the low temperature reacti on at 80℃in the second reactor, the total reaction time is less than 90min. It is the primarily performance of self-preparing catalyst that the conservation of HPA is almost 100%, the selectivity is 97% when reaction temperature is 130-135℃, reaction pressu re is 3.0-3.5MPa, the mass space velocityof HPA is 0.5/h, the molar ratio of hydrogen and HPA is 10-30.It is primarily concluded in the experiment (a) that Et3N content is the main fator that effects the selectivity of the catalyst, (b) that the runoff and poisoning of the ca talyst are the main causes that effect the catalyst lifetime. After experiment condition and preparation condition of the catalyst are optimized, the reaction time of the catal yst can reach 3000h and the ability of the catalyst can still maintain.