Eastman Chemical Company

Eastman-Kodak Company

Grupo Petrotemex S.a. De C.v.

Daniel Lee Martin

Bruce Roger DeBruin

Damon Bryan Shackelford

Peter Webb Raynolds

Benjamin Fredrick Barton

Joseph Franklin Knight

Disclosed is a process for the preparation of high molecular weight polyesters by reacting one or more dicarboxylic acids directly with 1,4-cyclohexanedimethanol and, optionally, one or more diols. The process uses an overall diol to dicarboxylic acid molar ratio of about 0.97 to about 1.2 and an incremental addition of either the diacid or diol components. The process provides a shorter total reaction time and, thus, lessens the thermal degradation of polyester which may result in high color and reduced molecular weight.

Process for the preparation of polyesters containing 1,4-cyclohexanedimethanol

There are disclosed polyester processes using a pipe reactor and corresponding apparatuses. In particular, there are disclosed processes and corresponding apparatuses including an esterification pipe reactor with a recirculating reaction zone (RR zone) and a plug reaction profile reaction zone (PRPR zone), especially when operated with a significant part of the overall conversion taking place in the plug reaction profile reaction zone (PRPR zone).

Polyester process using a pipe reactor

A process for purifying diethoxymethane from a mixture containing ethanol and, optionally, water. The process involves the addition of an amount of water, DEM, or an appropriate mixture of any two or three of water, DEM and ethanol that is effective in moving the mixture into the two liquid phase region on an equilibrium tie-line which crosses the critical distillation boundary without the need for additional azeotrope-forming agents such as cyclohexane.

Process for the purification of diethoxymethane from a mixture with

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Kingsport, TN, United States of America

Daniel Lee Martin