Ann Marie Corey
Engineering at Letchworth Dr, Akron, OH
License number
Louisiana EI.0014806
Issued Date
Jan 5, 1993
Category
Civil Engineer
Address
Address
575 Letchworth Dr, Akron, OH 44303
Professional information
Apparatus For Crystallization Of Polytrimethylene Terephthalate
US Patent:
6461575, Oct 8, 2002
Filed:
May 11, 1999
Appl. No.:
09/309921
Inventors:
Ben Duh - Tallmadge OH
Ye-Mon Chen - Sugar Land TX
Ann Marie Corey - Akron OH
Ye-Mon Chen - Sugar Land TX
Ann Marie Corey - Akron OH
Assignee:
Shell Oil Company - Houston TX
International Classification:
B01D 900
US Classification:
4222451
Abstract:
The pelletized product of melt condensation polymerization of 1,3-propanediol and terephthalic acid is crystallized in a vessel designed for continuous fluidized bed flow of the pellets in water at a temperature within the range of about 65 to about 100° C. Hot-water treatment in the vessel permits crystallization of the pellets in a continuous operation and results in an increase of the crystallinity of the polymer to greater than about 35% and an increase in pellet density.
High Temperature Solid State Polymerization Of Poly (Trimethylene Terephthalate)
US Patent:
6441129, Aug 27, 2002
Filed:
May 15, 2001
Appl. No.:
09/858171
Inventors:
Ben Duh - Tallmadge OH
Ann Marie Corey - Akron OH
Ann Marie Corey - Akron OH
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08F 600
US Classification:
528503, 528302, 528308, 5283086, 528481
Abstract:
The present invention is a process for producing poly(trimethylene terephthalate) (PTT) at an increased solid state polymerization rate, wherein 1,3-propane diol and an aromatic acid or a dialkyl ester thereof are esterified or transesterified, the esterification or transesterification product is polycondensed, and the polycondensation product is pelletized and then subjected to continuous solid state polymerization at a temperature of 200 to 225° C. , preferably 210 to 225° C. In one embodiment of the present invention, the temperature range is 200 to 220° C. , and the pellet size of the polymer to be solid state polymerized is from 1. 0 to 1. 5 g/100. In another embodiment of the present invention, the solid state polymerization is carried out at 210 to 225° C. for from 1 to 20 hours and then the temperature is increased to above the initial melting point of the polymer to produce a PTT polymer with an intrinsic viscosity of 1. 3 dl/g or greater.
Process For Preparing Polytrimethylene Terephthalate
US Patent:
6297315, Oct 2, 2001
Filed:
May 11, 1999
Appl. No.:
9/309923
Inventors:
Ben Duh - Tallmadge OH
Ye-Mon Chen - Sugar Land TX
Ann Marie Corey - Akron OH
Ye-Mon Chen - Sugar Land TX
Ann Marie Corey - Akron OH
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08L 6702
US Classification:
524605
Abstract:
The pelletized product of melt condensation polymerization of 1,3-propanediol and terephthalic acid (or alkyl ester thereof) is crystallized by immersion in water at a temperature within the range of 60 to about 100. degree. C. Hot-water treatment increases the crystallinity of the polymer to at least about 35% and increases pellet density to about 1. 33 g/cm. sup. 3.