Accession Number : ADD004582
Title : Dry Water.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C
Personal Author(s) : Allan,Barry D
Report Date : 15 Feb 1977
Pagination or Media Count : 3
Abstract : The invention consists of a submicroscopic particular silica having a particle size range from about 15-20 micrometers that is prepared in a hot gaseous environment at about 1100 C by the vapor phase hydrolysis of a silicon compound is reacted with liquid water in a ratio in weight percent of about 1 part water to about 9 parts waters to 1 part of the particulate silica to yield a powdered product which remains flowable over a wide temperature range - even when cooled to an extremely low temperature of -196 C. The adsorbed water is liberated on heating the powdered product. The powdered product with adsorbed water up to about 90 weight percent has utility as a coolant by liberating water on heating. The powdered product is useful as moisture source for miscellaneous purposes over a wide temperature range.
Descriptors : *Patents, *Coolants, *Water cooling, *Silicon dioxide, *Water, Preparation, Adsorption, Particle size, Powders, Heating
Subject Categories : Industrial Chemistry and Chemical Processing
Distribution Statement : APPROVED FOR PUBLIC RELEASE