Sabic Global Technologies B.v.

Shpp Global Technologies B.v.

Surya Prakasa Rao Daliparthi

Roy Ray Odle

Paulus Johannes Maria Eijsbouts

Thomas Link Guggenheim

Farid Fouad Khouri

Bernabe Quevedo Sanchez

Hareesh Shamrao Deshpande

Javier Nieves Remacha

Siva Kumar Sreeramagiri

Sunil S Dhumal

Srinivas Mahesh Kumar

Juan J Rodriguez Ordonez

Sivakumar Periyasamy

Maria Patricia Forcen Jimenez

Jose Roman Galdamez

Fernan Mateos Salvador

Ignacio Vic Fernandez

Nathalie Gonzalez Vidal

Jose Roman Galdamez Pena

Juan Rodriguez Ordonez

Carlos Sanjuan Fernandez

Carmen Rocío Misiego Arpa

Sivakumar P

Suman Kumar Sen

Mahesh Srinivas Kumar

Brennan Alexander Smith

Dhumal Sunil S

Hendrich Chiong

Miguel Angel Navarro De Castro

The invention is directed to a catalyst, to a method for manufacturing a catalyst, to a method for manufacturing a bisphenol compound, and to the use of a catalyst. The catalyst of the invention comprises particles having a core and a shell, wherein the shell comprises an ion exchange resin covering the core at least in part and wherein the core has a density that is higher than the density of the ion exchange resin.

Ion-exchange resin core-shell catalyst particles

In an embodiment, a reactor for carrying out a melt transesterification reaction at a reactor temperature of 160 to 300° C. and a reactor pressure of 5 to 200 mbar, comprises a cylindrical tank comprising a top, a side, and a bottom, wherein the bottom is convex, extending away from the top; a stirring shaft disposed within the cylindrical tank along an axis thereof so that it is rotatable from outside of the cylindrical tank; an impeller extending from the stirring shaft in the cylindrical tank and comprising a plurality of blades; a reactant solution inlet; a reaction solution outlet; and an externally located heat exchanger in fluid communication with the cylindrical tank via a recirculation stream and a heated stream. The reactor can be used for the polymerization of a polycarbonate oligomer.

Oligomeriser with improved mixing performance

In an embodiment, a reactor for carrying out a melt transesterification reaction at a reactor temperature of 160 to 300&#xb0; C. and a reactor pressure of 5 to 200 mbar, comprises a cylindrical tank comprising a top, a side, and a bottom, wherein the bottom is convex, extending away from the top; a stirring shaft disposed within the cylindrical tank along an axis thereof so that it is rotatable from outside of the cylindrical tank; a stirring blade extending from the stirring shaft in the cylindrical tank; a reactant solution inlet located on the bottom; and a reaction solution outlet located on the bottom. The reactor can be used for the polymerization of a polycarbonate oligomer.

Oligomeriser with an improved feed system

A polyetherimide of improved color and processes for preparing the polyetherimide are disclosed.

Process to make low color polyetherimide by halo-displacement and low color polyetherimide

The disclosure is directed to the use of an upflow reactor for producing a dihydroxy compound, to a method for producing a dihydroxy compound, and to a method for manufacturing polycarbonate. The upflow reactor for producing a dihydroxy compound of the disclosure comprises: a vessel; a catalyst bed disposed in said vessel; a distributor in fluid communication with an inlet through which reactants are introduced to said distributor, said distributor being disposed at a lower end of said vessel and comprising distributor perforation(s) disposed in said distributor, at least part of which distributor perforations are in a direction facing away from said catalyst bed; and a collector through which said product dihydroxy compound is removed, said collector being disposed at an upper end of said vessel.

Method for producing dihydroxy compounds

In an embodiment a method of purifying acetone, comprises directing a feed stream comprising greater than or equal to 97 wt % of acetone and 100 to 1,000 ppm of methanol to a separation column, both based on a total weight of the feed stream; separating the feed stream in the separation column that is operating at a pressure greater than or equal to 1 bar into an overhead stream and a purified acetone stream comprising less than or equal to 50 ppm of methanol based on a total weight of the purified acetone stream; and directing at least 80 wt % of the overhead stream into the separation column as a reconstituted stream and purging 1 to 20 wt % of the overhead stream as a purge stream.

Method of purifying acetone

A method of preparing a polyetherimide and an improved polyetherimide are disclosed. Low color polyetherimides are disclosed along with process improvements which produce the reduced color of the final product polymers.

Polyetherimide with improved color, and methods of manufacture thereof

The invention is directed to the use of an upflow reactor for producing a dihydroxy compound, to a method for producing a dihydroxy compound, and to a method for manufacturing polycarbonate. The upflow reactor for producing a dihydroxy compound of the invention comprises: a vessel; a catalyst bed disposed in said vessel; a distributor in fluid communication with an inlet through which reactants are introduced to said distributor, said distributor being disposed at a lower end of said vessel and comprising distributor perforation(s) disposed in said distributor, at least part of which distributor perforations are in a direction facing away from said catalyst bed; and a collector through which said product dihydroxy compound is removed, said collector being disposed at an upper end of said vessel.

Growing community of inventors

Karnataka, India

Surya Prakasa Rao Daliparthi