Preparation of caprolactone, caprolactam, 2,5-tetrahydrofuran dimethanol, 1,6-hexanediol or 1,2,6-hexanetriol from 5-hydroxymethyl-2-furfuraldehyde

摘要

The present invention relates to a method for preparing caprolactone, comprising converting 5-hydroxymethyl-2-furfuraldehyde by hydrogenation into at least one intermediate compound selected from the group of 2,5-tetrahydrofuran dimethanol, 1,6-hexanediol and 1,2,6-hexanetriol,and preparing caprolactone from said intermediate compound.;Further, the invention relates to a method for preparing 1,2,6 hexanetriol comprising preparing 5-hydroxymethyl-2-furfaldehyde from a renewable source, converting 5-hydroxymethyl-2-furfaldehyde into 2,5-tetrahydrofuran dimethanol and converting 2,5-tetrahydrofuran dimethanol into 1,2,6 hexanetriol.;Further, the invention relates to a method for preparing 1,6 hexanediol from 1,2,6-hexanetriol, wherein 1,2,6-hexanetriol is subjected to a ring closure reaction, thereby forming 2-hydropyranyl-methanol, and the 2-hydropyranyl-methanol is hydrogenated, thereby forming 1,6 hexane diol.