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Chemical Engineering

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Fathi Habashi

2015

Articles 1 - 7 of 7

Full-Text Articles in Engineering

Hydrometallurgy In The Past Decades. A Personal View, Fathi Habashi Aug 2015

Hydrometallurgy In The Past Decades. A Personal View, Fathi Habashi

Fathi Habashi

In the 1940s hydromtallurgy benefitted a great deal from Manhattan Project in USA, then in the 1950s a new technology was introduced by Sherritt-Gordon Mines in association with the Mines Branch in Ottawa to treat ores with ammonia under pressure and to precipitate metals from solution by hydrogen under pressure. Since then hydrometallurgy has made great progress as evidenced by the number of conferences held to discuss this topic. A personal view of these developments with those involved is given.

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Metallurgical Chemistry, Fathi Habashi Aug 2015

Metallurgical Chemistry, Fathi Habashi

Fathi Habashi

Metallurgical chemistry is the most ancient science of chemistry. It is related to the recovery of metals from ores and their refining. In its modern form, it involves separation of finely ground minerals by flotation, melting of ores, aqueous processing of ores, and the application of electric current to separate and purify metals from aqueous solution or from a fused salt. Metallurgical chemistry is closely related to the chemical industry.

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Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi Aug 2015

Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi

Fathi Habashi

Phosphate rock of sedimentary origin contains on the average 0.01 % uranium. Since large tonnage of this rock is used annually to produce fertilizers, this represented an important potential source of uranium. Before the discovery of rich uranium deposits this source was developed on industrial scale. The production of phosphoric acid by sulfuric acid process is at present facing the problem of disposal of gypsum; about 1.5 tons of gypsum is produced per ton of rock processed. This material contains all the radium originally present in the rock which results from the radioactive decay of uranium. As a result, phospho-gypsum …

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A Short History Of Uranium, Fathi Habashi Jul 2015

A Short History Of Uranium, Fathi Habashi

Fathi Habashi

Uranium was discovered in 1781 by Klaproth, a pharmacist in Berlin, from the black mineral pitchblende found in Joachimsthal silver mines. Peligot in France in 1841 proved that what Klaproth isolated from pichblende was uranium oxide and not the metal. Uranium salts were used at that time to manufacture coloured glass before the discovery of its radioactivity in 1896. It became in great demand when its decay product radium was found to cure cancer. The discovery if uranium fission in 1939 was the reason for the manufacture of the first atomic bomb.

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Sir Walter Raleigh And Tar Sands, Fathi Habashi Jul 2015

Sir Walter Raleigh And Tar Sands, Fathi Habashi

Fathi Habashi

Petroleum is sometimes ejected from underground to form lakes contaminated with rocks. The volatile components evaporate with time leaving behind a solid mixture known as asphalt or tar sands. Lake Asphalt in Trinidad contains about 40% bitumen. Sir Walter Raleigh (ca 1554 –1618) sailed to Trinidad in search of El Dorado but he discovered the lake instead.

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Movement Of Scientists And The Production Of Aluminum, Fathi Habashi May 2015

Movement Of Scientists And The Production Of Aluminum, Fathi Habashi

Fathi Habashi

Travelling scientists certainly have contributed to advancing knowledge by communicating their observations to others. Famous professors attract students from different countries to study in their institutions and the interaction among these students is of immense importance in the diffusion of knowledge. The invention of a process for the production of aluminum is an example.

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Joseph William Mellor (1869-1938) - - A Pioneer Ceramicist, Fathi Habashi Jan 2015

Joseph William Mellor (1869-1938) - - A Pioneer Ceramicist, Fathi Habashi

Fathi Habashi

Mellor is known to chemists as the author of the monumental work on General and Inorganic Chemistry but he is also a pioneer ceramicist. It was under his direction in 1920 that the British Refractories Research Association was formed which eventually became in 1948 the British Ceramic Research Association. Mellor spent most of his professional career at Stoke-on-Trent working on pottery.

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