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. 24, 1994
Filed:
Aug. 30, 1991
Gerald H Morine, Bemidji, MN (US);
Steven A Spigarelli, Bemidji, MN (US);
Bemidji State University Foundation, Bemidji, MN (US);
Abstract
An improved process for preparing a cation exchange material from peat selected from sphagnum or reed-sedge peat for improving the ion exchange capability of the peat. The raw peat is initially dried and ground to a particle size of less than about one millimeter, after which the particulate material is hydrolyzed in an acid solution of moderate strength for separation of soluble components. The hydrolyzed material is then refluxed in an organic solvent, such as a mixture of 2-propanol and toluene in a 1:2 volume ratio. Following removal of residual solvent, the peat is reacted with warm concentrated sulfuric acid, and thereafter ground or milled to a desirable particle size.