Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1971-11-08
1979-11-06
Edmundson, F. C.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204158R, 252429A, 252429B, B01J 110, B01J 3112
Patent
active
041735218
ABSTRACT:
The invention provides aqueous solutions of (1) the reaction product of anhydrous trimethyl borate with titanium tetrachloride and (2) polyvinyl alcohol, preferably not exceeding about 0.5 weight percent of each. These solutions have a pH of about 1 but when ammonium hydroxide is added the pH may be raised to about 10 without precipitation of titanium or gelation of the polyvinyl alcohol.
When the pH of the above solutions is adjusted to between about 2 and about 10, the solutions are photosensitive. When these solutions are in a confined zone, sunlight or actinic radiation in the range between ultraviolet light and the lower wavelengths of the visible spectrum causes oxygen from the air above the solutions to be consumed until it is all gone. Then, reduction of the colorless dissolved Ti(IV) compound to the dark blue Ti(III) state occurs without precipitation of the Ti(III) product or reoxidation to Ti(IV). The blue Ti(III) solution is quickly reoxidized by reexposure to air. Similar photosensitive solutions are formed with polyvinyl alcohol and other Ti(IV) compounds, such as (1) the tetravalent titanium compound conforming substantially to the formula Cl.sub.2 Ti(OR).sub.2 where R is H, CH.sub.3, C.sub.2, H.sub.5, C.sub.3 H.sub.7 or C.sub.4 H.sub.9 ; (2) titanyl sulfate, and (3) titanyl chloride. The polyvinyl alcohol may be replaced by other complexing agents, such as N-hydroxyethylenediaminetriacetic acid, diethanolglycine, glucoheptanoic acid, arabonic acid, glusonic acid, galactonic acid, saccharic acid, mucic acid, and the sodium and ammonium salts of these compounds.
REFERENCES:
patent: 2984658 (1961-05-01), Seydel et al.
patent: 3073766 (1963-01-01), Brown et al.
patent: 3114718 (1963-12-01), Elston
patent: 3284329 (1966-11-01), Aftandilian
Boss J. Harold
Edmundson F. C.
Marcus Stanley A.
Thiokol Corporation
LandOfFree
Photosensitive redox solutions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photosensitive redox solutions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photosensitive redox solutions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-461334