PROCESS FOR THE CONTINUOUS MANUFACTURE OF ARYL ALKYL CARBONATE AND/OR DIARYL CARBONATE USING VAPOR RECOMPRESSION
申请人:SABIC Innovative Plastics IP B.V.
公开号:US20140081039A1
公开(公告)日:2014-03-20
In an embodiment, a process for preparing an alkyl aryl carbonate and a diaryl carbonate, comprising: reacting a dialkyl carbonate and an aromatic hydroxy compound in a production column
200, 300
to form the alkyl aryl carbonate and the diaryl carbonate; directing a bottom stream of the production column to a reboiler
205, 305
, wherein the bottom stream comprises the alkyl aryl carbonate and the diaryl carbonate; heating the bottom stream in the reboiler
205, 305
with heat from an overhead stream of the production column
200, 300
to result in a heated bottom stream; directing a first portion of the heated bottom stream back into the production column
200, 300
, wherein the first portion comprises phenol; and collecting the diaryl carbonate and the alkyl aryl carbonate from a second portion of the heated bottom stream.
在一种实施例中,制备烷基芳基碳酸酯和二芳基碳酸酯的过程包括:在生产塔200、300中,将二烷基碳酸酯和芳香羟基化合物反应以形成烷基芳基碳酸酯和二芳基碳酸酯;将生产塔的底流引导至再沸器205、305,其中底流包括烷基芳基碳酸酯和二芳基碳酸酯;在再沸器205、305中加热底流,利用生产塔的顶流的热量,使底流加热;将加热后的底流的第一部分送回生产塔200、300,其中第一部分包括酚;并从加热后的底流的第二部分收集二芳基碳酸酯和烷基芳基碳酸酯。