Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2007-01-09
2007-01-09
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S416000, C562S487000, C562S606000
Reexamination Certificate
active
10645734
ABSTRACT:
Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The purified carboxylic acid slurry is further cooled in a cooling zone and subsequently filtered and dried in a filtration and drying zone. The process produces purified carboxylic acid product having good color and low impurity levels without the use of purification steps like hydrogenation or filtrate purge.
REFERENCES:
patent: 3170768 (1965-02-01), Baldwin
patent: 3584039 (1971-06-01), Meyer
patent: 3683018 (1972-08-01), Longland, Jr.
patent: 3799976 (1974-03-01), Nienburg et al.
patent: 3996271 (1976-12-01), Yokota et al.
patent: 4158738 (1979-06-01), Scott et al.
patent: 4201871 (1980-05-01), Tanouchi et al.
patent: 4268690 (1981-05-01), Komatsu et al.
patent: 4314073 (1982-02-01), Crooks
patent: 4330676 (1982-05-01), Moxham
patent: 4334086 (1982-06-01), Hanotier et al.
patent: 4357475 (1982-11-01), Hanotier et al.
patent: 4447646 (1984-05-01), Johnson et al.
patent: 4467111 (1984-08-01), Puskas et al.
patent: 4588414 (1986-05-01), Takegami et al.
patent: 4605763 (1986-08-01), Kiefer et al.
patent: 4707274 (1987-11-01), Donhauser et al.
patent: 4812233 (1989-03-01), Coenen et al.
patent: 4861919 (1989-08-01), Robbins et al.
patent: 4939297 (1990-07-01), Browder et al.
patent: 5008450 (1991-04-01), Yamamoto et al.
patent: 5080721 (1992-01-01), Flanigan et al.
patent: 5095146 (1992-03-01), Zeitlin et al.
patent: 5107874 (1992-04-01), Flanigan et al.
patent: 5110984 (1992-05-01), Janulis
patent: 5116423 (1992-05-01), Kokkonen et al.
patent: 5143554 (1992-09-01), Koyama et al.
patent: 5175355 (1992-12-01), Streich et al.
patent: 5200557 (1993-04-01), Gee et al.
patent: 5359133 (1994-10-01), Nazimok et al.
patent: 5454959 (1995-10-01), Stevens
patent: 5527957 (1996-06-01), Hindmarsh et al.
patent: 5563293 (1996-10-01), Hindmarsh et al.
patent: 5583254 (1996-12-01), Turner et al.
patent: 5616792 (1997-04-01), Bartos et al.
patent: 5635074 (1997-06-01), Stenstrom et al.
patent: 5643468 (1997-07-01), Ure
patent: 5676847 (1997-10-01), Yamamoto et al.
patent: 5679846 (1997-10-01), Hindmarsh et al.
patent: 5684187 (1997-11-01), Ohkoshi et al.
patent: 5698734 (1997-12-01), Turner et al.
patent: 5712412 (1998-01-01), Inary et al.
patent: 5777161 (1998-07-01), Inary
patent: 5840965 (1998-11-01), Turner et al.
patent: 5840968 (1998-11-01), Lee et al.
patent: 5925786 (1999-07-01), Isayama et al.
patent: 5955394 (1999-09-01), Kelly
patent: 6228215 (2001-05-01), Hoffman, Jr.
patent: 6495044 (2002-12-01), Verdoes
patent: 6517733 (2003-02-01), Carlson
patent: 6797073 (2004-09-01), Teruggi et al.
patent: 2003/0004372 (2003-01-01), Piras et al.
patent: 2004/0245176 (2004-12-01), Parker et al.
patent: 2004/0260052 (2004-12-01), Nagao et al.
patent: 2005/0087215 (2005-04-01), Miyahara et al.
patent: 31 28 474 (1982-06-01), None
patent: 0111784 (1986-02-01), None
patent: 983677 (1965-02-01), None
patent: 1 358 520 (1974-07-01), None
patent: 48-26740 (1973-09-01), None
patent: 7-149690 (1995-06-01), None
patent: 7-291896 (1995-11-01), None
patent: 9-286758 (1997-11-01), None
patent: 9-286759 (1997-11-01), None
patent: 2001-139514 (2001-05-01), None
patent: 2001-247511 (2001-09-01), None
patent: 2001-288139 (2001-10-01), None
patent: 2002-230819 (2002-08-01), None
patent: WO 93/24440 (1993-12-01), None
patent: WO 94/17892 (1994-08-01), None
patent: WO 99/31038 (1999-06-01), None
U.S. Appl. No. 10/645,737, filed Aug. 21, 2003, Sheppard et al.
U.S. Appl. No. 10/667,744, filed Sep. 22, 2003, Sumner et al.
Letter to the Examiner Dated Jan. 6, 2004 for U.S. Appl. No. 10/645,734.
Copending U.S. Appl. No. 10/758,676, filed Jan. 15, 2004 by Parker et al.
Copending U.S. Appl. No. 10/872,248, filed Jun. 18, 2004 by Sheppard.
PCT International Search Report.
Lin Robert
Sheppard Ronald Buford
Tennant Brent Alan
Woodruff Thomas Earl
Eastman Chemical Company
Graves, Jr. Bernard J.
Oh Taylor Victor
Owen Steven A.
Tsang Cecilia J.
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