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Dunn, Wendell. Chlorine extraction of gold – Chapter 10. in Gold, Silver, Uranium, and Coal: Geology, Mining, Extraction & Environment. Maurice C. Fuerstenau, Bruce R. Palmer. American
Institute of Mining, Metallurgical, and Petroleum Engineers, Black Hills Section. American Institute of Mining,
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From the late-1980s until the late-1990s Dunn joined with
European and Asian interests to develop a process for low-cost titanium-based pigments, and worked in India for months at a time. He was an adjunct faculty member in metallurgy at the
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for use as a paint pigment. He filed his first sole-inventor U.S. patent in 1954. He remained with the firm for 19 years during which time this process grew to become the dominant technology worldwide.
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Wendell E. Dunn. High temperature chlorination of titanium bearing minerals: part III. Metallurgical and
Materials Transactions B. Volume 10, Number 2 / June, 1979. Pages 293–294
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Wendell E. Dunn. High temperature chlorination of titanium bearing minerals: part IV. Metallurgical and
Materials Transactions B. Volume 10, Number 2 / June, 1979. Pages 271–277
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Process for beneficiating a titaniferous ore and production of chlorine and iron oxide. Inventor: Wendell E. Dunn, Jr. US Patent number: 3865920, Filing date: Mar 14, 1973
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from ore, and tantalum metals for use in electronic applications, and for the efficient separation and recovery of gold from low-grade ore and scrap.
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and DuPont, among others and performed R&D which formed the bases for several start-up ventures in South Dakota and beyond. He worked with the
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4,081,507 Process for removing chemisorbed and interstitial chlorine and chlorides from a hot titanium dioxide beneficiate-carbon mixture
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Alumina from alkali metal-aluminum chloride complexes. US Patent number: 4331645 Filing date: Apr 20, 1981 Inventor: Wendell E. Dunn, Jr.
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Process for preparing alkali-metal tetrachloroferrate. Inventor: Wendell E. Dunn, Jr. US Patent number: 3729543 Filing date: Jan 21, 1971
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Process for the production of niobium pentachloride. Inventor: Wendell E. Dunn, Jr. US Patent number: 3153572. Filing date: Jun 1, 1961
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Process for beneficiation of titaniferous ores. Inventor: Wendell E. Dunn, Jr, US Patent number: 3699206 Filing date: Mar 23, 1970
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Process for beneficiating titaniferous ores. Inventor: Wendell E. Dunn, Jr. US Patent number: 4389391 Filing date: Jun 28, 1981
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Charging fluidizing gas into fluidized bed reactor. Inventor: Wendell E. Dunn, Jr, US Patent number: 2856264 Filed Apr 9, 1954
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Cyclical vacuum chlorination processes, including lithium extraction. US Patent
Application 20050220691 Filed: March 28, 2005
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Cook, Charles M.; Dunn, Wendell E. (September 1961). "The
Reaction of Ferric Chloride with Sodium and Potassium Chlorides".
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and for the next three decades made significant contributions to the field of high-temperature chlorination of metal ores.
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3,865,920 Process for beneficiating a titaniferous ore and production of chlorine and iron oxide Filed: March 14, 1973
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4,349,516 Process for treating the gas stream from an aluminum value chlorination process Filed: April 20, 1981
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3,376,112 Production of chlorine through oxidation of film of ferric chloride salt complex Filed Aug 3, 1965
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Chlorine extraction of gold. Inventor: Wendell E. Dunn, Jr. Patent number: 4353740 Filing date: Sep 11, 1981
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technologies for high temperature chlorination, gold extraction, tantalum extraction and titanium extraction
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5,004,500 Chlorination process for recovering gold values from gold alloys Filed: February 13, 1989
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4,355,007 Two stage chlorination process for aluminum value containing source Filed: April 20, 1981
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In 1968 Dunn left DuPont to form his own contract research and development firm in
Delaware and
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3,729,543 Process for preparing alkali-metal tetra-chloroferrate Filed: January 21, 1971
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4,331,645 Alumina from alkali metal-aluminum chloride complexes Filed: April 20, 1981
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4,085,189 Process for recycle beneficiation of titaniferous ores Filed: May 21, 1976
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4,378,337 Still heating process for purifying aluminum chloride Filed: June 1, 1982
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4,363,789 Alumina production via aluminum chloride oxidation Filed: April 20, 1981
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4,390,400 Aluminum chloride addition to electrolytic cells Filed: May 26, 1981
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2,856,264 Charging fluidizing gas into fluidized bed reactor Filed Apr 9, 1954
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3,699,206 Process for beneficiation of titaniferous ores Filed: March 23, 1970
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3,153,572 Process for the production of niobium pentachloride Filed Jun 1, 1961
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Wendell Dunn at pilot plant for producing low-cost titanium process feedstock,
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4,211,755 Process for beneficiating titaniferous ores Filed: March 3, 1975
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4,389,391 Process for beneficiating titaniferous ores Filed: June 28, 1981
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in chemical engineering from Johns
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4,331,637 Process for purifying aluminum chloride Filed: April 20, 1981
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which developed an improved process for the production of high-purity
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In 1950 Dunn was a key member of the research and development team at
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3,929,501 Novel titanium dioxide composition Filed: June 4, 1973
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Between 1975 and 1995 Dunn consulted to international corporations
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4,353,740 Chlorine extraction of gold Filed: September 11, 1981
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Dunn had a whimsical side, and in 1979 penned a political satire,
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3,713,781 Cross-flow fluid bed reactor Filed: October 21, 1970
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3,887,694 Production of chlorine Filed: December 22, 1972
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area to develop processes for the extraction of ultra-pure
121:(August 30, 1922 – December 24, 2007) was an American
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3,724,171 Annular flow condenser Filed: April 29, 1971
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4,355,008 Chlorination process Filed: April 20, 1981
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3,683,590 Dual flue condenser Filed: April 29, 1971
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3,960,203 Fluidized bed cooler Filed: April 9, 1973
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in 1944, he was engaged in aircraft terrain avoidance
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275:in Baltimore. He was the nephew of civil engineer
112:Lillian D. Dunn, married 1944–1992 (her death)
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433:Metallurgical and Petroleum Engineers, 1983.
542:to niobium pentachloride Filed Nov 4, 1960
262:South Dakota School of Mines and Technology
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149:in Baltimore, and brother of conductor
558:Wendell E. Dunn Jr. on Google Patents
27:American chemical engineer (1922–2007)
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141:Dunn was the first son of educator
638:20th-century American male writers
538:3,107,144 Process for converting
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628:American male non-fiction writers
375:The Journal of Physical Chemistry
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633:20th-century American inventors
578:Johns Hopkins University alumni
573:20th-century American chemists
173:research in both the U.S. and
145:, for many years principal of
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588:American chemical engineers
544:3,009,773 Chlorination of
96:Chemical Engineer, Inventor
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623:American political writers
161:, Dunn was also awarded a
608:Scientists from Baltimore
583:Harvard University people
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199:Mount Morgan, Queensland
159:Johns Hopkins University
643:Inventors from Maryland
147:Forest Park High School
593:American metallurgists
207:E.I. DuPont de Nemours
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155:Baltimore City College
613:Writers from Maryland
514:Filed October 3, 1975
201:, Australia, ca 1975.
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119:Wendell Earl Dunn Jr.
34:Wendell Earl Dunn Jr.
273:Green Mount Cemetery
271:Dunn is interred in
211:Wilmington, Delaware
18:Wendell E. Dunn, Jr.
546:niobium oxychloride
540:niobium oxychloride
387:10.1021/j100905a008
183:U.S. Army Air Corps
59:Baltimore, Maryland
46:Wendell E. Dunn Jr.
618:American humorists
548:Filed Mar 31, 1958
248:and others in the
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189:Chemical research
177:. Dunn served as
123:chemical engineer
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153:. A graduate of
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87:, United States
85:Tucson, Arizona
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277:Everett Dunn
269:The Sex Tax.
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231:South Dakota
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185:until 1946.
167:V-12 program
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131:chlorination
127:metallurgist
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603:2007 deaths
598:1922 births
471:The Sex Tax
457:The Sex Tax
151:Thomas Dunn
137:Early years
567:Categories
283:References
250:Rapid City
242:Kerr-McGee
77:2007-12-25
163:doctorate
109:Spouse(s)
254:niobium
181:in the
179:captain
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223:Sydney
171:radar
157:and
70:Died
52:Born
383:doi
209:in
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