Method for preparing 1,3-dioxolane

Method for preparing 1,3-dioxolane

  • CN 102,276,575 B
  • Filed: 07/29/2011
  • Issued: 01/07/2015
  • Est. Priority Date: 07/29/2011
  • Status: Active Grant
First Claim
Patent Images

1. prepare a method for DOX, the method comprises the following steps:

  • 1) in reactor, add ethylene glycol, then add ionic liquid as catalyzer, by oil bath heating said mixture to 60 DEG C ~ 90 DEG C;

    2) in reactor, add the concentrated formaldehyde of 60 DEG C ~ 90 DEG C, the concentration of wherein said concentrated formaldehyde is 40% ~ 70%;

    3), after making said mixture Homogeneous phase mixing, oil bath temperature is increased to 90 DEG C ~ 150 DEG C and carries out total reflux reaction, and then by controlling the obtained DOX of reflux ratio extraction,Wherein, described ionic-liquid catalyst is selected from 1-butyl-3-methylimidazolium hydrogen sulphate salt, 1-(4-sulfonic group) butyl-3-Methylimidazole tosilate, 1-(4-sulfonic group) butyl-3-Methylimidazole fluoroform sulphonate, 1-(3-sulfonic group) propyl group-3-Methylimidazole tosilate, 1-(3-sulfonic group) propyl group-3-methylimidazolium hydrogen sulphate salt and N-(3-sulfonic group) propyIpyridine hydrosulfate.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×