Low temperature vapor phase digestion of graphite

Pierce, Robert A.

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A - human necessities
A01 - agriculture
A21 - baking
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B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
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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:: Pierce, Robert A.

Issue Date:: 2017-04-18

Research Org.:: Savannah River Site (SRS), Aiken, SC (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1351887

Patent Number(s):: 9623371

Application Number:: 14/867,644

Assignee:: Savannah River Nuclear Solutions, LLC

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23G - CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2251/604 - Hydroxides
B01D2252/20484 - with one hydroxyl group
B01D2253/102 - Carbon
B01D2255/2073 - Manganese
B01D2255/20761 - Copper
B01D2257/504 - Carbon dioxide
B01D2258/0216 - from CVD treatment or semi-conductor manufacturing
B01D53/04 - with stationary adsorbents {
B01D53/62 - Carbon oxides
B01D53/864 - {Removing carbon monoxide or hydrocarbons}

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23G - CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
C23G5/00 - Cleaning or de-greasing metallic material by other methods

G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
G21C19/38 - Chemical means only

G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
G21F9/30 - Processing

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E30/30 - Nuclear fission reactors

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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.

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                    Pierce, Robert A. Low temperature vapor phase digestion of graphite.  United States.

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                    Pierce, Robert A. Tue .  
        "Low temperature vapor phase digestion of graphite".  United States.  https://www.osti.gov/servlets/purl/1351887.

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@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         = {2017},

  month        = {4}

}

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Works referenced in this record:

Manufacture of Mellitic Acid
patent, October 1939

Juettner, Bernard
US Patent Document 2,176,348
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/2176348

Alternate Oxidation and Reduction of Carbon
patent, July 1950

McKinnis, Art C.
US Patent Document 2,516,233
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/2516233

Molding Composition and Process for Producing Same
patent, August 1960

Feild, Alexander L.
US Patent Document 2,948,627
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Composition and Process for Removing Heat Scale from Metal Parts
patent, March 1962

Arden, Benjamin
US Patent Document 3,025,189
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Chemical Cleaning of Metal Surfaces Employing Steam
patent, April 1963

Loucks, Charles M.; Brown, William B.
US Patent Document 3,084,076
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Chemical Disintegration and Recovery of Uranium from Sintered Graphite-Uranium Compacts
patent, November 1965

Bradley, M. J.
US Patent Document 3,219,408
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Pyrohydrolysis of Carbide-Type Nuclear Fuels
patent, October 1966

Flanary, James R.; Goode, Jerry H.; Wall, Geoffrey C.
US Patent Document 3,278,278
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3278278

Method of Producing Beryllium Wire
patent, October 1967

Gross, Jr., Alfred G.
US Patent Document 3,349,597
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3349597

Cleaning or Treating Process
patent, November 1968

Kondrot, Bruno J.
US Patent Document 3,410,724
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/3410724

Method of Removing Carbon From Nuclear Fuel Elements in a Closed System
patent, January 1973

Dolci, G.; Renzoni, R.
US Patent Document 3,714,323
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Process for a gasification of graphite
patent, October 1980

Sugikawa, Susumu; Maeda, Mitsuru; Tsujino, Takeshi
US Patent Document 4,228,141
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Apparatus for cooling a continuous casting mold
patent, November 1980

Feuchter, Peter; Katschinski, Ulrich; Roller, Erling
US Patent Document 4,235,279
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4235279

Catalyzed electrochemical gasification of carbonaceous materials at anode and production of hydrogen at cathode
patent, June 1983

Vaughan, Ronald J.
US Patent Document 4,389,288
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4389288

Heat-aided method for separating the graphite matrix from the nuclear fuel of nuclear reactor fuel elements
patent, March 1985

Hinssen, Hans-Klemens; Katscher, Werner; Loenissen, Karl-Josef
US Patent Document 4,507,267
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/4507267

Diamond crystal growth process
patent, April 1992

Gasworth, Steven M.
US Patent Document 5,108,779
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Method and apparatus for descaling metal strip
patent, December 1993

Cole, John M.; Bessey, Charles M.
US Patent Document 5,272,798
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Process for the separation of carbon nanotubes from graphite
patent, December 1997

Ikazaki, Fumikazu; Uchida, Kunio; Yumura, Motoo
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URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/5695734

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

Wojtoniszak, Malgorzata; Mijowska, Ewa
Journal of Nanoparticle Research, Vol. 14, Issue 11
https://doi.org/10.1007/s11051-012-1248-z

A highly efficient gas-phase route for the oxygen functionalization of carbon nanotubes based on nitric acid vapor
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Interaction of graphite with hydroxide-salt melts
journal, April 2006

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Similar Records

Title: Low temperature vapor phase digestion of graphite

Abstract

Citation Formats

Manufacture of Mellitic Acid patent, October 1939

Alternate Oxidation and Reduction of Carbon patent, July 1950

Molding Composition and Process for Producing Same patent, August 1960

Composition and Process for Removing Heat Scale from Metal Parts patent, March 1962

Chemical Cleaning of Metal Surfaces Employing Steam patent, April 1963

Chemical Disintegration and Recovery of Uranium from Sintered Graphite-Uranium Compacts patent, November 1965

Pyrohydrolysis of Carbide-Type Nuclear Fuels patent, October 1966

Method of Producing Beryllium Wire patent, October 1967

Cleaning or Treating Process patent, November 1968

Method of Removing Carbon From Nuclear Fuel Elements in a Closed System patent, January 1973

Process for a gasification of graphite patent, October 1980

Apparatus for cooling a continuous casting mold patent, November 1980

Catalyzed electrochemical gasification of carbonaceous materials at anode and production of hydrogen at cathode patent, June 1983

Heat-aided method for separating the graphite matrix from the nuclear fuel of nuclear reactor fuel elements patent, March 1985

Diamond crystal growth process patent, April 1992

Method and apparatus for descaling metal strip patent, December 1993

Process for the separation of carbon nanotubes from graphite patent, December 1997

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

Manufacture of Mellitic Acid
patent, October 1939

Alternate Oxidation and Reduction of Carbon
patent, July 1950

Molding Composition and Process for Producing Same
patent, August 1960

Composition and Process for Removing Heat Scale from Metal Parts
patent, March 1962

Chemical Cleaning of Metal Surfaces Employing Steam
patent, April 1963

Chemical Disintegration and Recovery of Uranium from Sintered Graphite-Uranium Compacts
patent, November 1965

Pyrohydrolysis of Carbide-Type Nuclear Fuels
patent, October 1966

Method of Producing Beryllium Wire
patent, October 1967

Cleaning or Treating Process
patent, November 1968

Method of Removing Carbon From Nuclear Fuel Elements in a Closed System
patent, January 1973

Process for a gasification of graphite
patent, October 1980

Apparatus for cooling a continuous casting mold
patent, November 1980

Catalyzed electrochemical gasification of carbonaceous materials at anode and production of hydrogen at cathode
patent, June 1983

Heat-aided method for separating the graphite matrix from the nuclear fuel of nuclear reactor fuel elements
patent, March 1985

Diamond crystal growth process
patent, April 1992

Method and apparatus for descaling metal strip
patent, December 1993

Process for the separation of carbon nanotubes from graphite
patent, December 1997

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