Method for synthesizing phenyloxalate from dicthyl oxalate and phenol

A technology of diethyl oxalate and diphenyl oxalate, which is applied in the field of raw materials for preparing diphenyl carbonate, can solve problems such as difficult separation of products and catalysts, and achieve the effects of saving separation process and equipment and reducing production costs.
CN1687003AActive Publication Date: 2005-10-26TIANJIN UNIV
11 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2005-10-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention discloses a method for catalytically synthesizing phenyloxalate by utilizing diethyl acetate and phenol as raw material. The mole ratio of diethyl acetaet and phenol is 1:20-20:1, its reaction time is 1-8 hr, reaction temperature is 160-240 deg.C and autogeneous reaction pressure is 0-1.0 MPa. Under the action of load metal oxide catalyst the above-mentioned raw material are undergone the process of ester-interchange reaction so as to obtain the invented phenyloxalate.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a kind of processing method that is used to prepare the raw material of diphenyl carbonate (DPC), specifically, relate to be catalyzer with supporting metal oxide, pass diethyl oxalate (DEO) and phenolic ester under heterogeneous condition Exchange reaction, catalyze the method for synthesizing diphenyl oxalate (DPO). Background technique

[0002] The preparation of diphenyl oxalate from diethyl oxalate and phenol is a key technology for the preparation of diphenyl carbonate from diethyl oxalate and phenol. The reaction steps experienced by this key technology are as follows:

[0003]

[0004] About the synthesis of diphenyl oxalate by transesterification of oxalate and phenol, the preparation process of diphenyl oxalate and then decarbonylation of diphenyl carbonate began to appear in the 1990s, but it developed rapidly. Japan's Ube company has been committed to this aspect Research, and applied for many patents, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More