Chemistry of inorganic compounds – Halogen or compound thereof – Chlorine dioxide
Patent
1989-02-15
1990-10-09
Doll, John
Chemistry of inorganic compounds
Halogen or compound thereof
Chlorine dioxide
423478, 568913, C01B 1102, C07C 2974
Patent
active
049619187
ABSTRACT:
The present invention relates to a process for production of chlorine dioxide by reacting in a reaction vessel an alkali metal chlorate, sulfuric acid and methanol as a reducing agent. A reaction medium is maintained at a temperature from about 50.degree. C. to about 100.degree. C. and is subjected to a subatmospheric pressure sufficient to effect evaporation of water whereby a mixture of chlorine dioxide and water vapor is withdrawn from an evaporation region in the reaction vessel and alkali metal sulfate is precipitated in a crystallization region in the reaction vessel. Raw methanol purified by separation and adsorption is used as reducing agent. The raw methanol is purified by dilution with water whereby an unpolar phase is separated and and the remaining methanol-water phase is contacted by an adsorbing agent. The adsorbing agents used can be zeolites, active carbon or polymer adsorbing agents.
REFERENCES:
patent: 3563702 (1971-02-01), de Vere Partridge et al.
patent: 3764627 (1973-10-01), Prinz
patent: 3864456 (1975-02-01), Winfield et al.
patent: 3933988 (1976-01-01), Rosen
patent: 4081520 (1978-03-01), Swindells et al.
patent: 4145401 (1979-03-01), Swindells et al.
patent: 4465658 (1984-08-01), Fredette
patent: 4473540 (1984-09-01), Fredette
patent: 4696720 (1987-09-01), Kiser
patent: 4770868 (1988-09-01), Norell
"The Composition of Condensates from the Evaporation of Sulfite Spent Liquor", Rexfelt et al., Svensk Papperstidning arg. 73, No. 21, Nov. 15, 1970, pp. 689-695.
Dahl Anders
Norell Maria
Soderberg Ursula
Bolam Brian M.
Doll John
Eka Nobel AB
LandOfFree
Process for production of chlorine dioxide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for production of chlorine dioxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for production of chlorine dioxide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-972298