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Title: Low temperature vapor phase digestion of graphite

Abstract

A method for digestion and gasification of graphite for removal from an underlying surface is described. The method can be utilized to remove graphite remnants of a formation process from the formed metal piece in a cleaning process. The method can be particularly beneficial in cleaning castings formed with graphite molding materials. The method can utilize vaporous nitric acid (HNO.sub.3) or vaporous HNO.sub.3 with air/oxygen to digest the graphite at conditions that can avoid damage to the underlying surface.

Inventors:
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1351887
Patent Number(s):
9,623,371
Application Number:
14/867,644
Assignee:
Savannah River Nuclear Solutions, LLC SRS
DOE Contract Number:  
AC09-08SR22470
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Sep 28
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Pierce, Robert A. Low temperature vapor phase digestion of graphite. United States: N. p., 2017. Web.
Pierce, Robert A. Low temperature vapor phase digestion of graphite. United States.
Pierce, Robert A. Tue . "Low temperature vapor phase digestion of graphite". United States. doi:. https://www.osti.gov/servlets/purl/1351887.
@article{osti_1351887,
title = {Low temperature vapor phase digestion of graphite},
author = {Pierce, Robert A.},
abstractNote = {A method for digestion and gasification of graphite for removal from an underlying surface is described. The method can be utilized to remove graphite remnants of a formation process from the formed metal piece in a cleaning process. The method can be particularly beneficial in cleaning castings formed with graphite molding materials. The method can utilize vaporous nitric acid (HNO.sub.3) or vaporous HNO.sub.3 with air/oxygen to digest the graphite at conditions that can avoid damage to the underlying surface.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 18 00:00:00 EDT 2017},
month = {Tue Apr 18 00:00:00 EDT 2017}
}

Patent:

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Works referenced in this record:

Controlled oxidation of graphite to graphene oxide with novel oxidants in a bulk scale
journal, October 2012


A highly efficient gas-phase route for the oxygen functionalization of carbon nanotubes based on nitric acid vapor
journal, March 2009


Interaction of graphite with hydroxide-salt melts
journal, April 2006

  • Zarubitskii, O. G.; Dmitruk, B. F.; Zakharchenko, N. F.
  • Russian Journal of Applied Chemistry, Vol. 79, Issue 4, p. 525-528
  • DOI: 10.1134/S1070427206040033