PROCESS FOR THE CONVERSION OF 2 - METHYLBUTANAL TO ISOPRENE

摘要

A process for the conversion of an aldehyde of 4 to 6 carbon atoms to the corresponding diene which comprises contacting the aldehyde in the vapour phase at temperature of from 200 to 400 deg.C with a boron phosphate catalyst, said catalyst is characterised in that the initial molar ratio of phosphorus (P) to boron (B) (P/B) is less than 1.0 but greater than 0.6 and wherein boron phosphate is in intimate admixture with 0.1-10 wt.% graphite.