Majid Keyvani - Lake Charles LA Rekha Menon - Lake Charles LA James L. Meyer - Lake Charles LA Thomas W. Offill - Lake Charles LA
Assignee:
Arco Chemical Technology, L.P. - Greenville DE
International Classification:
C07C20990
US Classification:
564305
Abstract:
The present invention is directed to a process for transporting toluenediamine (TDA) from a first site to a second site. The process of the invention comprises the steps of (a) providing a molten mass of TDA isomers at the first site; (b) cooling the molten mass to a temperature below the melting point, the molten mass thereby forming flowable particles of solid TDA in an inert gas; (c) providing an airtight storage vessel lined with a chemically inert liner; (d) storing the flowable particles of solid TDA in the lined storage vessel; (e) charging the storage vessel with inert gas; (f) transporting the storage vessel from the first site to the second site; and (g) remelting the TDA flowable particles in inert gas with TDA liquid that is superheated above the melting point to produce a molten TDA isomer mixture in inert gas having substantially the same isomer ratio as that of the molten mass. Also disclosed is a process for storing TDA in a cost-effective manner while reducing the likelihood of TDA degradation during storage, relative to conventional TDA storage methods.
Robert W. Mason - Lake Charles LA Peter C. Imm - Sulphur LA Paul J. Craney - Lake Charles LA Thomas W. Offill - Lake Charles LA Robert T. Brooker - Lake Charles LA
Assignee:
Olin Corporation - Cheshire CT
International Classification:
C07C20511
US Classification:
568934
Abstract:
The present invention relates to a process for purifying an aromatic nitration product mixture comprising a nitrated aromatic compound, water, and nitric or sulfuric acid which comprises without regard to sequence: (a) removing at least a portion of said water from said product mixture by contacting and reacting said water in said mixture with magnesium nitrate trihydrate to form magnesium nitrate pentahydrate or magnesium nitrate hexahydrate and removing said magnesium nitrate pentahydrate or magnesium nitrate hexahydrate from said nitrated aromatic compound in said product mixture, and (b) removing at least a portion of said acid from said product mixture by contacting and reacting said acid with an ionic or non-ionic absorbent to form a reacted absorbent and removing said reacted absorbent from said nitrated aromatic compound in said product mixture.
Thomas Offill (1966-1970), Pam Mitchell (1973-1977), Shelly Russell (1981-1985), Ross Fanucchi (1969-1973), Andrew Kuehn (1992-1995), Jessica Peterson (1992-1992)
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