AUGUSTE JOSEPH FRANCOIS DE BAVAY
AUGUSTE JOSEPH FRANCOIS DE BAVAY, in British patent No. 18,660, Aug. 29, 1904, described a flotation process in which a thin film of freely flowing pulp was brought on to the surface of a vessel of water, where advantage was taken of the surface tension of the liquid, and the sulphide floated. He further points out that if the surface of the sulphide particles is coated with a film of carbonate from weathering, this is detrimental to the process, and should be removed by (i) soaking the ore in a weak solution of carbonate of ammonia, or (2) passing carbonic gas through the pulverised wet ore, or (3) by friction.
JAMES HYNDES GILLIES, in United States patent No. 778,747, Sept. 7, 1904, duplicated British patent No. 20,159, Sept. 19, 1904
JAMES HYNDES GILLIES, in United States patent No. 780,281, Sept. 8, 1904, duplicated British patent No. 20,160, Sept. 19, 1904.
JAMES HYNDES GILLIES, in British patent No. 20,159 and No. 20,160, Sept. 19, 1904, described an apparatus to be used in conducting the Potter and Delprat processes.
SULMAN & PICARD, in Commonwealth patent No. 1,909, Oct. 27, 1904, duplicated their N.S.W. patent, No. 13,632.
ALFRED SCHWARZ, in British patent No. 23,906, Nov. 4, 1904, described a process of concentration wherein he added to a dry or slightly wet pulp a portion of fat, oil, or resinous substance, which was solid at ordinary temperature. After several complicated manipulations, the oil and mineral were separated from the gangue by flotation. This is a duplicate of United States patent No. 771,277, Oct. 7, 1904, by Alice H. Schwarz.
ARTHUR PENRHYN STANLEY MACQUISTEN, in British patents No. 25,204 and No. 25,204 A, Nov. 19, 1904, described a process and apparatus therefor, making use of the surface tension of liquids for separating minerals, whereby some floated and others sank. His apparatus is new and important, but works on the old and well known principle of surface tension.
AUGUSTE JOSEPH FRANCOIS DE BAVAY, in British patent No. 25,858, Nov. 28, 1904, described an apparatus for mineral separation by the process described in his patent of Aug. 29, 1904, previously mentioned.
AUGUSTE JOSEPH FRANCOIS DE BAVAY, in United States patent No. 864,597, Dec. 19, 1904, duplicated British patent No. 18,660, Aug. 29, 1904.
AUGUSTE JOSEPH FRANCOIS DE BAVAY, in United States patent No. 912,783, Dec. 19, 1904, described an apparatus for performing processes at pressures above normal.
SULMAN, PICARD, & BALLOT, in British patent No. 29,374, Dec. 31, 1904, described a process and apparatus therefor wherein they made use of the idea of oil-and-gas notation combined with surface tension. A mineral particle coated with a film of oil not only adheres to a small bubble of air or other gas introduced into the pulp and floats with the bubble, but all oiled particles that are exposed to the air above the surface of the pulp take unto themselves films of air of much larger dimensions than if un-oiled, and so float more readily than un-oiled particles.
FRANCIS EDWARD ELMORE, in British patent No. 29,282, Dec. 31, 1904, described an apparatus to perform the operation described in his vacuum-process patent.
SULMAN & PICARD, in British patent No. 1,821, Jan. 30, 1905, described a process that depends on the surface tension of the liquid. SULMAN, PICARD, & BALLOT, in United States patent No. 879,985, Feb. 2, 1905, duplicated British patent No. 29,374, Dec. 31, 1904.
WALTER MURRAY SANDERS, in United States patent No. 805,382, Feb. 7, 1905, described a method of gas-flotation in which he used alkaline solutions to generate bubbles of hydrogen gas on the minerals.
SULMAN, PICARD, & BALLOT, in British patent No. 5,260, Mar. 13, 1905, described a process of flotation in which they revert to surface tension as applied to dry ores. In the simplest method described by them they sprinkle the dry ore on the surface of the liquid in a spitzkasten. The sulphides being more difficult to wet, or rather, adhering more strongly to their air-films than the gangue, floated, and the gangue sank.
ALEXANDER STANLEY ELMORE, in British patent No. 5,953, Mar. 21, 1905, described a method of using calcium chloride and other chlorides in flotation-concentration.
SULMAN, PICARD, & BALLOT, in British patent No. 7,803, April 12, 1905, described a process of flotation in which they added extremely small amounts of oil, less than 0.1%, to a freely flowing pulp, and gave it violent agitation for from i to 10 minutes.
CYRIL DOUGLAS McCouRT, in British patent No. 10,475, May 18, 1905, described a process for concentrating graphite and other non-metallic substances by means of oil-flotation. No new principle is disclosed herein, but previously patented processes are put to a new use.
SULMAN, PICARD, & BALLOT, in United States patent No. 835,120, May 29, 1905, duplicated British patent No. 7,803, April 12, 1905.
SULMAN, PICARD, & BALLOT, in United States patent No. 835,479, May 29, 1905, duplicated British patent No. 26,712, Dec. 21, 1905.
HENRY LIVINGSTONE SULMAN, in Commonwealth patent No. 4,667, June 6, 1905, duplicated his invention in British patent No. 19,709, Sept. 25, 1905.
ARTHUR PENRHYN STANLEY MACQUISTEN, in United States patent No. 865,194, July 3, 1905, duplicated British patent No. 25,204, Nov. 19, 1904.
FRANCIS EDWARD ELMORE, in United States patent No. 826,411, July 10, 1905, duplicated his process in British patent No. 17,816, Aug. 16, 1904.
ALFRED SCHWARZ, in United States patent No. 825,080, July 12, 1905, described an improved form of apparatus for use in his processes previously described.
ALFRED SCHWARZ, in United States patent No. 842,255, July 19, 1905, duplicated British patent No. 23,906, Nov. 4, 1904.
ARTHUR PENRHYN STANLEY MACQUISTEN, in British patent No. 15,119, July 22, 1905, described an improvement to his surface-tension process, in which he made use of oil and various salts and acids.
HENRY LIVINGSTONE SULMAN, in British patent No. 19,709, Sept. 29, 1905, described an improvement upon the previous oiland- gas process ; this consisted in bringing the contents of the agitating-vessel to a boiling temperature.
