Feng-Chih Chang - Lake Jackson TX David E. Busby - Lake Jackson TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C07C 3784
US Classification:
568724
Abstract:
Occluded organic solvent is removed from bisphenol crystals by placing in water maintained at a temperature sufficient to form a molten water-bisphenol phase, holding at that temperature for a time sufficient to transfer the organic solvent to the water phase, flash distilling the organic solvent, cooling molten water-bisphenol phase to produce crystallization and thereafter recovering the bisphenol.
Method Of Removing Acetylene From Anhydrous-Hydrogen Chloride
German R. Urioste - Lake Jackson TX David E. Busby - Lake Jackson TX Garnet E. McConchie - Clute TX Jimmy D. Orr - Freeport TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
B01D 5334
US Classification:
423488
Abstract:
Small amounts of acetylene in anhydrous hydrogen chloride can be reduced by heating the gas to a temperature within the range of about 300. degree. C to 500. degree. C in the presence of oxygen, said oxygen being in molar excess to that of the acetylene present. The process converts up to 99+% of the acetylene to vinyl chloride, carbon monoxide, other oxidation and chlorinated products with minimal production of chlorine which is an undesirable by-product.
John C. Scheifley - Lake Jackson TX Clark R. Shields - Angleton TX David E. Busby - Lake Jackson TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C01B 701 B01D 5334
US Classification:
423481
Abstract:
Halogenated hydrocarbon materials are burned in an internally-fired horizontal fire-tube boiler and the heat of combustion directly produces saturated steam. Halogen values may be recovered from the combustion gases, e. g. , by being absorbed in water. Thus halogenated hydrocarbon material which may need to be disposed of, is beneficially converted to energy and useful product.
John C. Scheifley - Lake Jackson TX Clark R. Shields - Angleton TX David E. Busby - Lake Jackson TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
F22B 712
US Classification:
122149
Abstract:
Halogenated hydrocarbon materials are burned in an internally-fired horizontal fire-tube boiler and the heat of combustion directly produces saturated steam. Halogen values may be recovered from the combustion gases, e. g. , by being absorbed in water. Thus halogenated hydrocarbon material which may need to be disposed of, is beneficially converted to energy and useful product.