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. 29, 2017
Filed:
Mar. 16, 2012
Valery Dolmatov, Vantaa, FI;
Vesa Myllymaki, Vantaa, FI;
Valery Dolmatov, Vantaa, FI;
Vesa Myllymaki, Vantaa, FI;
CARBODEON LTD OY, Vantaa, FI;
Abstract
A mild, acid- and alkali-free purification method of detonation nanodiamond material from water-insoluble metal-containing impurities and product obtained thereof. The products thus obtained include nanodiamond and diamond-containing detonation blend. The method is implemented by an impact treatment of the detonation nanodiamond material with aqueous or water organic solutions of chelating agents in concentrations 0.5-20 wt. % at elevated temperature, wherein the weight-percent ratio of the detonation nanodiamond material to an undiluted chelating agent is substantially 1 to 0.2. Impact treatment of the detonation nanodiamond material in chelating agent solution may include boiling, ultrasonication, cavitational disintegration, and harsh treatment in sealed chamber at temperatures of up to about 300° C. and high pressure. The method provides at least 5-fold reduction of metal-containing impurities in the resulting product, wherein the content of such elements as chromium and iron is reduced to negligible amounts.