Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
2008-03-18
2008-03-18
Berch, Mark L. (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
active
10138337
ABSTRACT:
In a process for the purification of triethylenediamine (TEDA) in which TEDA is vaporized and the gaseous TEDA is passed into a liquid solvent and is subsequently crystallized from this, the mother liquor obtained after the TEDA has been crystallized is extracted with an extractant which is immiscible or only slightly miscible with the solvent of the mother liquor and in which TEDA is readily soluble, and the TEDA-depleted mother liquor obtained after extraction and/or the TEDA-enriched extractant which has been used for the extraction are/is returned to the process.
REFERENCES:
patent: 902073 (1908-10-01), Gueritey
patent: 2937176 (1960-05-01), Herrick
patent: 3123607 (1964-03-01), Farkas et al.
patent: 3297701 (1967-01-01), Brader et al.
patent: 3993651 (1976-11-01), Keating
patent: 4017494 (1977-04-01), Bosche et al.
patent: 4182864 (1980-01-01), Nieh et al.
patent: 4216323 (1980-08-01), Otsuki et al.
patent: 4233447 (1980-11-01), Nieh et al.
patent: 4289881 (1981-09-01), Imre et al.
patent: 4757143 (1988-07-01), Vanderpool et al.
patent: 4804758 (1989-02-01), Hoelderich et al.
patent: 5741906 (1998-04-01), Santiesteban et al.
patent: 6627756 (2003-09-01), Riechers et al.
patent: 1 745 627 (1970-05-01), None
patent: 24 42 929 (1976-03-01), None
patent: 26 11 069 (1976-09-01), None
patent: 28 49 993 (1979-05-01), None
patent: 37 18 395 (1987-12-01), None
patent: 36 34 258 (1988-04-01), None
patent: 199 33 850 (2001-01-01), None
patent: 199 62 455 (2001-06-01), None
patent: 101 00 943 (2002-07-01), None
patent: 111 928 (1984-06-01), None
patent: 382 055 (1990-08-01), None
patent: 842 935 (1998-05-01), None
patent: 1070717 (2001-01-01), None
patent: 1 070 717 (2001-06-01), None
patent: 902073 (1962-07-01), None
patent: 2 080 283 (1982-02-01), None
patent: 2080283 (1982-02-01), None
patent: 49-048609 (1974-05-01), None
patent: WO 03/022851 (2003-03-01), None
Frauenkron Matthias
Funhoff Dirk
Lang Ortmund
Manderbach Thomas
Rumpf Bernd
BASF SE
Novak Druce & Quigg LLP
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