公开(公告)号：US20180186809A1

公开(公告)日：2018-07-05

申请号：US15738363

申请日：2016-06-09

Applicant: PERSTORP AB

Inventor： Mikael WERNERSSON ,  Linh Mong NGO

IPC: C07D493/10

CPC classification number: C07D493/10

Abstract: Disclosed is a process for production of a spiroglycol by subjecting pentaerythritol to reaction in water with hydroxypivaldehyde in presence of a catalytically active amount of at least one acid catalyst and seed particles, wherein pentaerythritol, water, at least one acid catalyst and spiroglycol seed particles are charged to a reaction vessel, equipped with heating/cooling and agitation, and under stirring heated to a predetermined reaction temperature followed by progressive addition of hydroxypivaldehyde. The spiroglycol seed particles are present in an amount of 0.5-1.0% by weight, calculated on pentaerythritol, water, acid catalyst and hydroxypivaldehyde, and the hydroxypivaldehyde is charged at a rate determined over time by monitoring growth and/or formation of yielded spiroglycol particles.