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:
May. 02, 1995
Filed:
Aug. 03, 1994
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210638 ; 210634 ; 210913 ; 423 89 ; 75723 ;
Abstract
A method of selectively separating lead ions from metal ions-containing aqueous liquid by contact with a solution containing a polyether derivative dissolved in a water-insoluble organic solvent and serving as an ionophore or carrier for lead ions. The polyether derivative is a compound expressed by the general formula: ##STR1## wherein R.sub.1 and R.sub.2 stand independently from each other for a hydrogen atom or an alkyl group and n is an integer of 2 or 3.