Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Preparing inorganic compound
Patent
1997-10-01
2000-01-04
Gorgos, Kathryn
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Preparing inorganic compound
205436, 205438, 205456, C25B 100, C25B 300
Patent
active
060106123
ABSTRACT:
A process and a system produces isocyanate and converts anhydrous hydrogen chloride, which is a by-product of isocyanate production, to chlorine gas in an electrochemical cell. The chlorine is recycled to the isocyanate process. Any unreacted anhydrous hydrogen chloride may be recycled to the electrochemical cell. By recycling the anhydrous hydrogen chloride and the chlorine, the process and system are able to reduce the cost of producing isocyanate. In addition, this process and system process eliminate or at least substantially minimize the problems associated with disposal of anhydrous hydrogen chloride by turning it into a useful starting material in the isocyanate process.
REFERENCES:
patent: 2822373 (1958-02-01), Beck
patent: 5411641 (1995-05-01), Trainham, III et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 14, Imaging Technology to Lanthanides (Organic Isocyanates), John Wiley & Sons, Fourth Edition, (1995), pp. 902-934. no month available.
Ullman's Encyclopedia of Industrial Chemistry, Fifth Edition, (1989), vol. A19, pp. 412, 413 and 414. no month available.
Minz, F. R. "HCI-Electrolysis--Technology for Recycling Chlorine", Bayer AG, Coference on Electrochemical Processing, Innovation & Progress, Glasgow, Scotland, UK. Apr. 21-23, 1993.
Ullmann's Encyclopedia of Industrial Chemistry, Fifth, Completely Revised Edition, vol. A 14, Immobilized Biocatalysts to Isoprene, pp. 614, 617, 618 and 620, ?/1989.
Felix Vinci Martinez
Freire Francisco Jose
Kaiser Bruce Arthur
Law, Jr. Clarence Garlan
Mah Dennie Turin
E.I. Du Pont de Nemours and Company
Gorgos Kathryn
Wong Edna
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