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1 Hall, Charles Martin
SUBJECT AREA: Metallurgy[br]b. 6 December 1863 Thompson, Ohio, USAd. 27 December 1914 USA[br]American metallurgist, inventor of the first feasible electrolytic process for the production of aluminium.[br]The son of a Congregationalist minister, Hall was educated at Oberlin College. There he was instructed in chemistry by Professor F.F.Jewett, a former student of the German chemist Friedrich Wöhler, who encouraged Hall to believe that there was a need for a cheap process for the manufacture of aluminium. After graduating in 1885, Hall set to work in his private laboratory exploring the method of fused salt electrolysis. On Wednesday 10 February 1886 he found that alumina dissolved in fused cryolite "like sugar in water", and that the bath so produced was a good conductor of electricity. He contained the solution in a pure graphite crucible which also acted as an efficient cathode, and by 16 February 1886 had produced the first globules of metallic aluminium. With two backers, Hall was able to complete his experiments and establish a small pilot plant in Boston, but they withdrew after the US Patent Examiners reported that Hall's invention had been anticipated by a French patent, filed by Paul Toussaint Héroult in April 1886. Although Hall had not filed until July 1886, he was permitted to testify that his invention had been completed by 16 February 1886 and on 2 April 1889 he was granted a seventeen-year monopoly in the United States. Hall now had the support of Captain A.E. Hunt of the Pittsburgh Testing Institute who provided the capital for establishing the Pittsburgh Reduction Company, which by 1889 was selling aluminium at $1 per pound compared to the $15 for sodium-reduced aluminium. Further capital was provided by the banker Andrew Mellon (1855–1937). Hall then turned his attention to Britain and began negotiations with Johnson Matthey, who provided land on a site at Patricroft near Manchester. Here the Aluminium Syndicate, owned by the Pittsburgh Reduction Company, began to produce aluminium in July 1890. By this time the validity of Hall's patent was being strongly contested by Héroult and also by the Cowles brothers, who attempted to operate the Hall process in the United States. Hall successfully sued them for infringement, and was confirmed in his patent rights by the celebrated ruling in 1893 of William Howard Taft, subsequently President of the USA. In 1895 Hall's company changed its name to the Pittsburgh Aluminium Company and moved to Niagara Falls, where cheap electrical power was available. In 1903 a legal compromise ended the litigation between the Hall and Héroult organizations. The American rights in the invention were awarded to Hall, and the European to Héroult. The Pittsburgh Aluminium Company became the Aluminium Company of America on 1 January 1907. On his death he left his estate, worth about $45 million, for the advancement of education.[br]Principal Honours and DistinctionsChemical Society, London, Perkin Medal 1911.Further ReadingH.N.Holmes, 1930, "The story of aluminium", Journal of Chemical Education. E.F.Smith, 1914, Chemistry in America.ASD -
2 процесс Холла
1) Engineering: Hall electrolytic process (электролитическое получение алюминия), Hall process2) Electrochemistry: Hall process (злектролитическое извлечение Al из Al2O3) -
3 процесс Холла
( электролитическое получение алюминия) Hall electrolytic process -
4 Héroult, Paul Louis Toussaint
SUBJECT AREA: Metallurgy[br]b. 1863 Thury-Harcourt, Caen, Franced. 9 May 1914 Antibes, France[br]French metallurigst, inventor of the process of aluminium reduction by electrolysis.[br]Paul Héroult, the son of a tanner, at the age of 16, while still at school in Caen, read Deville's book on aluminium and became obsessed with the idea of developing a cheap way of producing this metal. After his family moved to Gentillysur-Bièvre he studied at the Ecole Sainte-Barbe in Paris and then returned to Caen to work in the laboratory of his father's tannery. His first patent, filed in February and granted on 23 April 1886, described an invention almost identical to that of C.M. Hall: "the electrolysis of alumina dissolved in molten cryolite into which the current is introduced through suitable electrodes. The cryolite is not consumed." Early in 1887 Héroult attempted to obtain the support of Alfred Rangod Pechiney, the proprietor of the works at Salindres where Deville's process for making sodium-reduced aluminium was still being operated. Pechiney persuaded Héroult to modify his electrolytic process by using a cathode of molten copper, thus making it possible produce aluminium bronze rather than pure aluminium. Héroult then approached the Swiss firm J.G.Nehe Söhne, ironmasters, whose works at the Falls of Schaffhausen obtained power from the Rhine. They were looking for a new metallurgical process requiring large quantities of cheap hydroelectric power and Héroult's process seemed suitable. In 1887 they established the Société Metallurgique Suisse to test Héroult's process. Héroult became Technical Director and went to the USA to defend his patents against those of Hall. During his absence the Schaffhausen trials were successfully completed, and on 18 November 1888 the Société Metallurgique combined with the German AEG group, Oerlikon and Escher Wyss, to establish the Aluminium Industrie Aktiengesellschaft Neuhausen. In the early electrolytic baths it was occasionally found that arcs between the bath surface and electrode could develop if the electrodes were inadvertently raised. From this observation, Héroult and M.Killiani developed the electric arc furnace. In this, arcs were intentionally formed between the surface of the charge and several electrodes, each connected to a different pole of the AC supply. This furnace, the prototype of the modern electric steel furnace, was first used for the direct reduction of iron ore at La Praz in 1903. This work was undertaken for the Canadian Government, for whom Héroult subsequently designed a 5,000-amp single-phase furnace which was installed and tested at Sault-Sainte-Marie in Ontario and successfully used for smelting magnetite ore.[br]Further ReadingAluminium Industrie Aktiengesellschaft Neuhausen, 1938, The History of the Aluminium-Industrie-Aktien-Gesellschaft Neuhausen 1888–1938, 2 vols, Neuhausen.C.J.Gignoux, Histoire d'une entreprise française. "The Hall-Héroult affair", 1961, Metal Bulletin (14 April):1–4.ASDBiographical history of technology > Héroult, Paul Louis Toussaint
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5 Morrison, William Murray
[br]b. 7 October 1873 Birchwood, Inverness-shire, Scotlandd. 21 May 1948 London, England[br]Scottish pioneer in the development of the British aluminium industry and Highlands hydroelectric energy.[br]After studying at the West of Scotland Technical College in Glasgow, in January 1895 Morrison was appointed Engineer to the newly formed British Aluminium Company Limited (BAC); it was with this organization that he spent his entire career. The company secured the patent rights to the Héroult and Bayer processes. It constructed a 200 tonne per year electrolytic plant at Foyers on the shore of Loch Ness, together with an adjacent 5000 kW hydroelectric scheme, and it built an alumina factory at Larne Harbour in north-eastern Ireland. Morrison was soon Manager at Foyers, and he became the company's Joint Technical Adviser. In 1910 he was made General Manager, and later he was appointed Managing Director. Morrison successfully brought about improvements in all parts of the production process; between 1915 and 1930 he increased the size of individual electrolytic cells by a factor of five, from 8,000 to 40,000 amperes. Soon after 1901, BAC built a second works for electrolytic reduction, at Kinlochleven in Argyllshire, where the primary design originated from Morrison. In the 1920s a third plant was erected at Fort William, in the lee of Ben Nevis, with hydroelectric generators providing some 75 MW. Alumina factories were constructed at Burntisland on the Firth of Forth and, in the 1930s, at Newport in Monmouthshire. Rolling mills were developed at Milton in Staffordshire, Warrington, and Falkirk in Stirlingshire, this last coming into use in the 1940s, by which time the company had a primary-metal output of more than 30,000 tonnes a year. Morrison was closely involved in all of these developments. He retired in 1946 as Deputy Chairman of BAC.[br]Principal Honours and DistinctionsCommander of the Order of St Olav of Norway 1933 (BAC had manufacturing interests in Norway). Knighted 1943. Vice-Chairman, British Non-Ferrous Metals Research Association, Faraday Society, Institute of Metals. Institute of Metals Platinum Medal 1942.Bibliography1939, "Aluminium and highland water power", Journal of the Institute of Metals 65:17– 36 (seventeenth autumn lecture),See also: Hall, Charles MartinJKABiographical history of technology > Morrison, William Murray
См. также в других словарях:
Hall-Héroult process — The Hall Héroult process is the major industrial process for the production of aluminium. It involves dissolving alumina in molten cryolite, and electrolysing the solution to obtain pure aluminium metal.ProcessAluminium cannot be produced by the… … Wikipedia
Electrolytic process — An electrolytic process is the use of electrolysis industrially to refine metals or compounds at a high purity and low cost. Some examples are the Hall Héroult process used for aluminium, or the production of hydrogen from water. Electrolysis is… … Wikipedia
Hall — [hôl] 1. Charles Martin 1863 1914; U.S. chemist: discovered electrolytic process for reducing aluminum from bauxite 2. G(ranville) Stanley 1844 1924; U.S. psychologist & educator … English World dictionary
Hall , Charles Martin — (1863–1914) American chemist Hall was born in Thompson, Ohio, and educated at Oberlin College, graduating in 1885. He became interested in the costly process of manufacturing aluminum – until the late 19th century aluminum was a precious metal… … Scientists
hall process — ˈhȯl noun Usage: usually capitalized H Etymology: after Charles M. Hall died 1914 American chemist : the process by which aluminum is produced consisting of electrolysis of a molten solution of purified alumina in cryolite at a temperature of… … Useful english dictionary
Hall, Charles Martin — born Dec. 6, 1863, Thompson, Ohio, U.S. died Dec. 27, 1914, Daytona Beach, Fla. U.S. chemist. He attended Oberlin College, where, soon after graduating in 1885, he discovered the method of producing aluminum by electrolysis (simultaneously with… … Universalium
Hall process — a process in which aluminum is refined by electrolytic reduction of alumina fused with cryolite. [after Charles Martin HALL] * * * … Universalium
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Industrial process — Industrial processes are procedures involving chemical or mechanical steps to aid in the manufacture of an item or items, usually carried out on a very large scale.Industrial processes are the key components of heavy industry.Most processes make… … Wikipedia
Castner–Kellner process — The Castner–Kellner process is a method of electrolysis on an aqueous alkali chloride solution (usually sodium chloride solution) to produce the corresponding alkali hydroxide,[1] invented by American Hamilton Castner and Austrian[2] Karl Kellner … Wikipedia
Bayer process — The Bayer process is the principal industrial means of refining bauxite to produce alumina.Bauxite, the most important ore of aluminium, contains only 30 54% alumina, Al2O3, the rest being a mixture of silica, various iron oxides, and titanium… … Wikipedia
