The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1996
Filed:
Oct. 03, 1995
Steven P Wheeler, Torrance, CA (US);
Theodore R Bryan, Brea, CA (US);
Other;
Abstract
The present method is capable of completely neutralizing the aldehydes in aldehydic waste waters within about 15 minutes and of producing a non-toxic waste water which then can be disposed of without fear of contamination of drain lines, etc. The method is carried out by contacting aldehyde-containing waste water with a sufficient amount of sodium pyrosulfite to completely neutralize the aldehydes in the waste water within about 15 minutes to non-toxic substances. The contacting is initiated without first adjusting the pH of the waste water and is maintained during the treatment period with agitation of the waste water being treated to assure full neutralization of all parts thereof. The sodium pyrosulfite and its reaction products are non-toxic. No hazard label is required for the sodium pyrosulfite, in contrast to certain conventional waste treating chemicals. The sodium pyrosulfite is a white crystalline powder easily stored, handled, weighed out and used without danger. The sodium pyrosulfite does not generate poisonous gasses, in contrast to sodium bisulfite which off-gasses sulfur dioxide when it is contacted with an acidic environment. The treated waste water in the present method has a pH of about 6-9 and usually is about pH 7 and is ready for disposal without safety precautions.