Saudi Basic Industries Corporation

Sabic Global Technologies B.v.

Darshan Jayanna

Tukaram Gunale

Alexander Stanislaus

Philip Wesley Bell

Ganesh Kannan

Husnu Alp Alidedeoglu

Venkata Ramanarayanan Ganapathy Bhotla

Belinda Duckworth

Hareesh Shamrao Deshpande

Vic Ignacio Fernandez

Venkata Ramanarayana Ganapathy Bhotla

Hareesh Shamroa Deshpande

Phillip Wesley Bell

Vic Ignacio Fernández

Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Method for the preparation of (polybutylene-co-adipate terephthalate) through the in situ phosphorus containing titanium based catalyst

The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70&#xb0; C. to 200&#xb0; C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate.

Manufacture of dihydroxy aromatic compounds by alcoholysis of flame retardant-containing polycarbonate compositions

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.

Manufacture of dihydroxy aromatic compounds by alcoholysis of polycarbonate-containing compositions

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&#xb0; C. to 200&#xb0; 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.

Method for alcoholysis of acrylonitrile-butadiene-styrene-containing polycarbonate compositions

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Tumkur, India

Darshan Jayanna