Title:
CLOSELY LINKING A NDA PROCESS WITH A PEN PROCESS
Document Type and Number:
WIPO Patent Application WO2001016066
Kind Code:
A3
Abstract:
Disclosed is a method for closely linking a process for producing 2,6-naphthalene dicarboxylic acid (2,6-NDA) with a process for producing polyethylene naphthalate, thus eliminating the need for drying 2,6-NDA, handling solid 2,6-NDA, and optimizing particle size of 2,6-NDA which comprises: a) adding an aqueous slurry of polymer grade 2,6-NDA directly into a process for making PEN, either by directly adding a stream from a 2,6 NDA process into a PEN process, or by adding water to polymer grade 2-6 - NDA prior to adding the resulting slurry to a PEN process; b) removing the slurry water during the first esterification reaction at the same time the water of reaction is removed.
Inventors:
RODDEN JOHN B
ELLIOTT GLENN W
ELLIOTT GLENN W
Application Number:
PCT/US2000/021670
Publication Date:
September 27, 2001
Filing Date:
August 08, 2000
Export Citation:
Assignee:
SHELL OIL CO (US)
International Classes:
B01J27/232; C07B61/00; C07C51/02; C07C51/15; C07C51/265; C07C51/41; C07C51/42; C07C51/43; C07C51/47; C07C51/48; C07C51/487; C07C63/38; C08G63/189; C08G63/78; (IPC1-7): C07C51/265; C07C51/41; C07C51/487; C08G63/189; C07C63/36; C07C63/38
Foreign References:
| US5292934A | 1994-03-08 | |||
| US3671578A | 1972-06-20 | |||
| EP0926124A1 | 1999-06-30 | |||
| US4820868A | 1989-04-11 |
Other References:
DATABASE WPI Derwent World Patents Index; AN 1974-03789v, XP002160524, "2,6-naphthalene dicarboxylic acid salt - preparation from crude naphthoic acid"
DATABASE WPI Derwent World Patents Index; AN 1995-203774, XP002160525, "Purification of 2,6-naphthalene dicarboxylic acid"
DATABASE WPI Derwent World Patents Index; AN 1995-203774, XP002160525, "Purification of 2,6-naphthalene dicarboxylic acid"
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