Afif M Nesheiwat

US Patent:

50030426, Mar 26, 1991

Filed:

Dec 29, 1989

Appl. No.:

7/458922

Inventors:

Afif M. Nesheiwat - Madison NJ

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7516
C08G 1600

US Classification:

528503

Abstract:

A process is provided for preparing a polymeric resin comprising the steps of: (a) preparing a first slurry, wherein the solid component thereof comprises a first particulate resin selected from the group consisting of poly(arlene sulfide ketone)s and poly(arylene sulfide diketone)s, and wherein the liquid component thereof comprises a polar organic compound; (b) substantially liquifying the first particulate resin to form a mixture comprising the substantially liquified first particulate resin and the polar organic compound; and (c) reducing the temperature of the mixture sufficiently to solidify the substantailly liquified resin and form a second slurry, wherein the solid component thereof comprises a second polymeric resin. The filterability of the slurry containing the second polymeric resin is superior to that of the first slurry.

US Patent:

51342243, Jul 28, 1992

Filed:

Feb 14, 1991

Appl. No.:

7/654983

Inventors:

Afif M. Nesheiwat - Madison NJ
Lacey E. Scoggins - Bartlesville OK
Melvin D. Herd - Idaho Falls ID

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7516

US Classification:

528388

Abstract:

According to this invention, improved results in terms of molecular weight and percent yield of aromatic sulfide/sulfone polymers are achieved by the employment of a low level modifying agent within a specific range in the polymerization reaction mixture. The modifying agent employed is a salt of an amino carboxylic acid. The salt can be employed as an already existing salt of an amino carboxylic acid or can be formed in situ by employing either an amino carboxylic acid and a base; or a lactam and a base.

US Patent:

50456296, Sep 3, 1991

Filed:

May 8, 1989

Appl. No.:

7/349562

Inventors:

Afif M. Nesheiwat - Chatham NJ

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7514

US Classification:

528481

Abstract:

A method for recovering a crystalline poly(arylene sulfide) from a slurry comprising a particulate poly(arylene sulfide), a polar organic compound, and water, said method comprising: (a) substantially liquefying said particulate poly(arylene sulfide) to form a liquid mixture comprising said substantially liquified poly(arylene sulfide) and said polar organic compound; (b) contacting said liquid mixture with a vaporized separation agent in an amount sufficient to effect a separation between said poly(arylene sulfide) and said polar organic compound; (c) reducing the temperature of said liquid mixture sufficiently to solidify said substantially liquified poly(arylene sulfide) to form a slurry comprising a particulate poly(arylene sulfide); and (d) recovering said particulate poly(arylene sulfide) from said slurry.

US Patent:

50379542, Aug 6, 1991

Filed:

Dec 27, 1989

Appl. No.:

7/457635

Inventors:

Afif M. Nesheiwat - Madison NJ
Rex L. Bobsein - Bartlesville OK
Joseph G. Ceurvorst - Lakewood CO

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7514

US Classification:

528499

Abstract:

A method is provided for recovering poly(arylene sulfide) from a mixture comprising a liquid-phase poly(arylene sulfide) and a polar organic compound, wherein the liquid mixture is contacted by an amount of a liquid, vaporized, or mixed phase separation agent at least sufficient to effect or enhance a phase separation of the liquid-phase poly(arylene sulfide) component from the polar organic compound. The poly(arylene sulfide) resins recovered according to this invention generally exhibit uniform particle size and do not tend to adhere to vessel walls during the recovery.

US Patent:

50534874, Oct 1, 1991

Filed:

Oct 4, 1989

Appl. No.:

7/417173

Inventors:

Afif M. Nesheiwat - Chatham NJ

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7514

US Classification:

528388

Abstract:

In one embodiment, the inventive process comprises: (a) preparing a first slurry comprising a first particulate PAS resin and a polar organic compound, (b) heating the first slurry to a temperature in the range of about 20. degree. C. (68. degree. F. ) to about 40. degree. C. (104. degree. F. ) below the liquid-to-solid phase transitional temperature of the first particulate resin, and (c) rapidly cooling the first slurry to below about 50. degree. C. (122. degree. F. ) below the liquid-to-solid phase transitional temperature of the first particulate resin in the polar organic compound to form a second slurry, comprising the polar organic compound and a polymeric mixture comprising a novel particulate high molecular weight PAS resin and a minor amount of a particulate low molecular weight PAS resin. In another embodiment, the inventive process comprises: (a) preparing a liquid mixture comprising a first particulate PAS resin and a polar organic compound, at a temperature above the solid-to-liquid phase transitional temperature of the first particulate resin, (b) slowly cooling the liquid mixture to between about 20. degree. C. (68. degree. F. ) to about 40. degree. C. (104. degree. F.

US Patent:

53289811, Jul 12, 1994

Filed:

Nov 19, 1991

Appl. No.:

7/794768

Inventors:

Afif M. Nesheiwat - Madison NJ
Jon F. Geibel - Bartlesville OK

International Classification:

C08G 200
C08F 600
C08J 300

US Classification:

528481

Abstract:

A poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin having improved handling characteristics is prepared by a process comprising preparing in a first enclosed vessel a slurry comprising a solid poly(arylene sulfide ketone) or poly(arylene sulfide diketone) resin and a liquid polar organic compound, and optionally water; then substantially liquifying the resin to form a mixture comprising substantially liquified resin and polar organic compound; then flashing the mixture into a second vessel having a pressure lower than the first vessel, thereby removing a portion of the polar organic compound and solidifying the resin. When the slurry further comprises water, the invention method optionally includes a venting step prior to the substantial liquification of the resin and/or a concentration step after the substantial liquification of the resin.

US Patent:

50083686, Apr 16, 1991

Filed:

Aug 3, 1989

Appl. No.:

7/389020

Inventors:

Afif M. Nesheiwat - Chatham NJ

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7514

US Classification:

528388

Abstract:

A method for producing a poly(arylene sulfide/sulfone) polymer is provided which comprises: contacting reactants comprising a dihalogenated aromatic sulfone, an alkali metal sulfide, a polar organic compound, at least one base, an alkali metal carboxylate, and, optionally water, under suitable conditions to initiate a polymerization reaction; thereafter adding an amount of water while maintaining polymerization conditions; then terminating the reaction; and recovering the polymer. The invention method provides for a polymer product wherein the production of low molecular weight product is minimized and high molecular weight yield is maximized.

US Patent:

49636510, Oct 16, 1990

Filed:

May 8, 1989

Appl. No.:

7/349561

Inventors:

Afif M. Nesheiwat - Chatham NJ

Assignee:

Phillips Petroleum Company - Bartlesville OK

International Classification:

C08G 7518

US Classification:

528483

Abstract:

A method is provided for recovering poly(arylene sulfide) from a liquid reaction mixture, comprising a liquid-phase poly(arylene sulfide) and a polar organic compound which can also function as a solvent for the polymer, and water. The liquid reaction mixture is contacted by an amount of a vaporized phase separation agent at least sufficient to effect or enhance a phase separation of the liquid-phase poly(arylene sulfide) component from the polar organic compound. The poly(arylene sulfide resins recovered according to this invention exhibit greater particle size than those recovered according to prior art methods, and do not tend to adhere to vessel walls during recovery.