Eastman Chemical Company

Grupo Petrotemex S.a. De C.v.

Duane Alan Hall

Kenny Randolph Parker

Robert Lin

Timothy Alan Upshaw

Alan George Wonders

Bruce Roger DeBruin

Tommy Ray Maddox, Ii

Aaron Grills

Raymond Isaac

Ollie W Smith, Jr

Jeremy R Shuppert

Ii Tommy Ray Maddox

A dryer system configured for use in a polyester polymer production process. In one embodiment, the dryer system can be utilized in a non-solid-state polymer production process to dry the polymer particles prior to crystallization.

Dryer configuration for production of polyester particles

A process and apparatus which reduces the fines in a liquid discharge stream and/or increases the dryness of a solids discharge stream while under a pressure equal to or greater than the vapor pressure of the liquid. There is provided a process for separating particles such as polyethylene terephthalate or polyethylene naphthalate from a liquid in a slurry comprising feeding a slurry comprising solid particles and a liquid into a separation zone maintained at a pressure equal to or greater than the vapor pressure of the liquid; contacting the slurry in the separation zone with a porous filter; and separating liquid from the particles, wherein the liquid flows through the filter into an outer annulus defined as a space between a wall of the separation device and the filter, said porous filter having a terminal point beyond which the separated liquid does not pass from the outer annulus back through the filter; accumulating no liquid in the outer annulus or accumulating liquid in the outer annulus at a level below the terminal point, and continuously discharging the separated liquid form the outer annulus through a liquid outlet; and decoupling the particles from the separation zone through an outlet at a low pressure below the vapor pressure of the liquid at the liquid temperature within the separation zone, while maintaining a pressure on the particles prior to decoupling at or above the vapor pressure of the liquid within the separation zone.

Crystallized pellet/liquid separator

The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a carboxylic acid/solvent slurry without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethylene glycol mixture is obtained from a terephthalic acid/solvent slurry without isolation of a substantially dry terephthalic acid solid.

Process for production of a carboxylic acid/diol mixture suitable for use in polyester production

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Lexington, SC, United States of America

Duane Alan Hall