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:
Jul. 07, 1998
Filed:
Mar. 04, 1996
Alan D Strickland, Lake Jackson, TX (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
An analytical process for determining the biodegradability of chelants containing a double carboxyl-containing moiety of specified formula, based on the atomic distances between the carboxyl moieties, is disclosed. According to this process the biodegradability of a chelant can be rapidly determined by determining whether the distance between the carboxyl carbon atoms ('Distance A') falls within the range of from about 3.81.times.10.sup.-10 m to about 3.86.times.10.sup.-10 m; the distance between the carboxyl double bonded oxygen atoms ('Distance B') falls within the range from about 5.13.times.10.sup.-10 to about 5.52.times.10.sup.-10 m; and the distance between the carboxyl hydroxy oxygen atoms ('Distance C') falls within a range of from about 5.28.times.10.sup.- m to about 6.09.times.10.sup.-10 m; and whether the lowest unoccupied molecular orbital (LUMO) is on at least one carboxyl carbon atom of the moiety. If all of the above criteria are met, the compound is predicted to be biodegradable.