Photocatalytic treatment of water for the preparation of ultra p

Details Photocatalytic treatment of water for the preparation of ultra p Photocatalytic treatment of water for the preparation of ultra p

1988-03-09

1989-09-05

Cintins, Ivars

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210668, 210748, 210763, 210900, C02F 130, C02F 172

Patent

active

048636088

ABSTRACT:
A new process step for purifying water from a small amount, particularly a last trace amount, of organic impurities included in total organic carbon (TOC) content is incorporated into known processes for the preparation of ultra pure water comprising one or more previous filtration steps and a series of purification steps known per se. The new step comprises irradiating the water to be treated with a light in the presence of a photocatalyst comprising an inorganic semiconductor selected from TiO.sub.2, SrTiO.sub.3 and CdS in fine particulate form and a noble metal and/or an oxide thereof selected from Pt, Pd, Ru, RuO.sub.2 and Rh deposited on said semiconductor particles for a period of time sufficient to oxidatively decompose the organic impurities, resulting in a decrease in TOC content of the water to a level lower than the minimum detection level of TOC detectors, typically <0.05 mg C/l or <0.01 mg C/l depending upon the sensitivity of particular detectors available up to date.

REFERENCES:
patent: 3870033 (1975-03-01), Faylor et al.
patent: 4571290 (1986-02-01), Ward et al.

Affiliated with

Also associated with

Rating

Photocatalytic treatment of water for the preparation of ultra p does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photocatalytic treatment of water for the preparation of ultra p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photocatalytic treatment of water for the preparation of ultra p will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-241623