公开(公告)号：US08680227B1

公开(公告)日：2014-03-25

申请号：US13723432

申请日：2012-12-21

Applicant: Saudi Basic Industries Corporation

Inventor： Philip Wesley Bell ,  Alexander Stanislaus ,  Venkata Ramanarayana Ganapathy Bhotla ,  Tukaram Gunale ,  Darshan Jayanna

IPC: C08G64/00 ,  C08G63/02

CPC classification number: C07C37/84 ,  C07C37/0555 ,  C07C68/06 ,  C08J11/24 ,  C08J2369/00 ,  Y02W30/706 ,  C07C39/16 ,  C07C69/96

Abstract: A method to produce a purified dihydroxy aromatic compound from a polycarbonate-containing composition is provided. The method includes depolymerizing the polycarbonate by alcoholysis using a titanium-based catalyst producing a dihydroxy aromatic compound and a dialkyl carbonate, recovering the dihydroxy aromatic compound as a crude dihydroxy aromatic compound; and contacting the recovered crude dihydroxyl aromatic compound with an acid in the presence of a solvent at an elevated temperature. Alternatively, the method comprises dissolving the recovered crude dihydroxyl aromatic compound in a solvent; contacting the dissolved crude dihydroxy aromatic compound with a base; and neutralizing the combination of the dissolved crude dihydroxy aromatic compound and the base with an acid.

Abstract translation: 提供了从含有聚碳酸酯的组合物制备纯化的二羟基芳族化合物的方法。 该方法包括使用产生二羟基芳族化合物和碳酸二烷基酯的钛基催化剂通过醇解来解聚聚碳酸酯，回收作为粗二羟基芳族化合物的二羟基芳族化合物; 并在高温下在溶剂存在下使回收的粗二羟基芳族化合物与酸接触。 或者，该方法包括将回收的粗二羟基芳族化合物溶解在溶剂中; 使溶解的粗二羟基芳族化合物与碱接触; 并用酸中和溶解的粗二羟基芳族化合物与碱的组合。

公开(公告)号：US08680226B1

公开(公告)日：2014-03-25

申请号：US13723431

申请日：2012-12-21

Applicant: Saudi Basic Industries Corporation

Inventor： Philip Wesley Bell ,  Alexander Stanislaus ,  Venkata Ramanarayanan Ganapathy Bhotla ,  Tukaram Gunale ,  Darshan Jayanna

IPC: C08G64/00 ,  C08G63/02

CPC classification number: C08L69/00 ,  C08J11/24 ,  C08J2369/00 ,  C08J2455/02 ,  Y02W30/706 ,  C08L55/02

Abstract: The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and acrylonitrile-butadiene-styrene. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar in a reactor for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate; removing the dihydroxy aromatic compound and the dialkyl carbonate from the reactor, the acrylonitrile-butadiene-styrene remaining as a coating on the surfaces of the reactor; adding a solvent to the reactor; and heating the solvent to remove the acrylonitrile-butadiene-styrene from the surfaces of the reactor.

Abstract translation: 本公开提供了从包含聚碳酸酯和丙烯腈 - 丁二烯 - 苯乙烯的含聚碳酸酯的组合物中回收二羟基芳族化合物和碳酸二烷基酯的方法。 该方法包括在醇和酯交换催化剂的存在下，在70℃至200℃的温度和50毫巴至40巴的压力下在反应器中加热该组合物足够的时间以使聚碳酸酯生产 二羟基芳族化合物和碳酸二烷基酯; 从反应器中除去二羟基芳族化合物和碳酸二烷基酯，作为反应器表面上的涂层残留的丙烯腈 - 丁二烯 - 苯乙烯; 向反应器中加入溶剂; 并加热溶剂以从反应器的表面除去丙烯腈 - 丁二烯 - 苯乙烯。