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1 умягчение воды известкованием
Construction: soda-and-lime processУниверсальный русско-английский словарь > умягчение воды известкованием
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2 Brown Sour
The American term for the souring process in bleaching, and consists of passing the cloth through tanks of water containing sulphuric or hydrochloric acid or sometimes both. This souring process counteracts the action of any caustic soda or lime that may remain in the cotton fibre after liming. -
3 умягчение известью и кальцинированной содой
Русско-английский экологический словарь > умягчение известью и кальцинированной содой
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4 Deacon, Henry
[br]b. 30 July 1822 London, Englandd. 23 July 1876 Widnes, Cheshire, England[br]English industrial chemist.[br]Deacon was apprenticed at the age of 14 to the London engineering firm of Galloway \& Sons. Faraday was a friend of the family and gave Deacon tuition, allowing him to use the laboratories at the Royal Institution. When the firm failed in 1839, Deacon transferred his indentures to Nasmyth \& Gaskell on the Bridgewater Canal at Patricroft. Nasmyth was then beginning work on his steam hammer and it is said that Deacon made the first model of it, for patent purposes. Around 1848, Deacon joined Pilkington's, the glassmakers at St Helens, where he learned the alkali industry, which was then growing up in that district on account of the close proximity of the necessary raw materials, coal, lime and salt. Wishing to start out on his own, he worked as Manager at the chemical works of a John Hutchinson. This was followed by a partnership with William Pilkington, a former employer, who was later replaced by Holbrook Gaskell, another former employer. Deacon's main activity was the manufacture of soda by the Leblanc process. He sought improvement by substituting the ammonia-soda process, but this failed and did not succeed until it was perfected by Solvay. Deacon did, however, with his Chief Chemist F.Hurter, introduce improvements in the Leblanc process during the period 1866–70. Hydrochloric acid, which had previously been a waste product and a nuisance, was oxidized catalytically to chlorine; this could be converted with lime to bleaching powder, which was in heavy demand by the textile industry. The process was patented in 1870.[br]Further ReadingD.W.F.Hardie, 1950, A History of the Chemical Industry in Widnes, London. J.Fenwick Allen, 1907, Some Founders of the Chemical Industry, London.LRD -
5 Weldon, Walter
SUBJECT AREA: Chemical technology[br]b. 31 October 1832 Loughborough, Englandd. 20 September 1885 Burstow, Surrey, England[br]English industrial chemist.[br]It was intended that Weldon should enter his father's factory in Loughborough, but he decided instead to turn to journalism, which he pursued with varying success in London. His Weldon's Register of Facts and Occurrences in Literature, Science, and Art ran for only four years, from 1860 to 1864, but the fashion magazine Weldon's Journal, which he published with his wife, was more successful. Meanwhile Weldon formed an interest in chemistry, although he had no formal training in that subject. He devoted himself to solving one of the great problems of industrial chemistry at that time. The Leblanc process for the manufacture of soda produced large quantities of hydrochloric acid in gas form. By this time, this by-product was being converted, by oxidation with manganese dioxide, to chlorine, which was much used in the textile and paper industries as a bleaching agent. The manganese ended up as manganese chloride, from which it was difficult to convert back to the oxide, for reuse in treating the hydrochloric acid, and it was an expensive substance. Weldon visited the St Helens district of Lancashire, an important centre for the manufacture of soda, to work on the problem. During the three years from 1866 to 1869, he took out six patents for the regeneration of manganese dioxide by treating the manganese chloride with milk of lime and blowing air through it. The Weldon process was quickly adopted and had a notable economic effect: the price of bleaching powder came down by £6 per ton and production went up fourfold.By the time of his death, nearly all chlorine works in the world used Weldon's process. The distinguished French chemist J.B.A.Dumas said of the process, when presenting Weldon with a gold medal, "every sheet of paper and every yard of calico has been cheapened throughout the world". Weldon played an active part in the founding of the Society of Chemical Industry.[br]Principal Honours and DistinctionsFRS 1882. President, Society of Chemical Industry 1883–4.Further ReadingT.C.Barker and J.R.Harris, 1954, A Merseyside Town in the Industrial Revolution: St Helens, 1750–1900, Liverpool: Liverpool University Press; reprinted with corrections, 1959, London: Cass.S.Miall, 1931, A History of the British Chemical Industry.LRD -
6 Madder Bleach
The most thorough bleach that cotton cloth receives. The process takes about four days and consists of several long boilings with alkalies and a final treatment with bleaching powder. It gives a full white and is generally used for goods to be printed. The usual procedure is as follows: - (1) Singeing to burn off all loose fibre. (2) Grey soaking, a simple steeping in water. (3) Lime boil, boiling in lime water for about ten hours under pressure, then washed in water. (4) Lime sour, a washing in cold acid solution of about 1 per cent strength. (5) and (6) Lye boilings in dilute solutions of caustic soda with resin soap for about ten hours. The sixth operation omits resin soap. (7) Chemicking, treatment in cold dilute solutions of bleaching powder, afterwards washing in water. (8) White sour, treatment in cold dilute acid solution as in No. 4. (9) Thorough washing in water and then drying. -
7 Mitscherlich, Alexander
SUBJECT AREA: Paper and printing[br]b. 28 May 1836 Berlin, Germanyd. 31 May 1918 Oberstdorf, Germany[br]German inventor of sulphite wood pulp for papermaking.[br]Mitscherlich had an impeccable scientific background; his father was the celebrated chemist Eilhardt Mitscherlich, discoverer of the law of isomorphism, and his godfather was Alexander von Humboldt. At first his progress at school failed to live up to this auspicious beginning and his father would only sanction higher studies if he first qualified as a teacher so as to assure a means of livelihood. Alexander rose to the occasion and went on to gain his doctorate at the age of 25 in the field of mineralogical chemistry. He worked for a few years as Assistant to the distinguished chemists Wöhler in Göttingen and Wurtz in Paris. On his father's death in 1863, he succeeded him as teacher of chemistry in the University of Berlin. In 1868 he accepted a post in the newly established Forest Academy in Hannoversch-Munden, teaching chemistry, physics and geology. The post offered little financial advantage, but it left him more time for research. It was there that he invented the process for producing sulphite wood pulp.The paper industry was seeking new raw materials. Since the 1840s pulp had been produced mechanically from wood, but it was unsuitable for making fine papers. From the mid-1860s several chemists began tackling the problem of separating the cellulose fibres from the other constituents of wood by chemical means. The American Benjamin C.Tilghman was granted patents in several countries for the treatment of wood with acid or bisulphite. Carl Daniel Ekman in Sweden and Karl Kellner in Austria also made sulphite pulp, but the credit for devising the process that came into general use belongs to Mitscherlich. His brother Oskar came to him at the Academy with plans for producing pulp by the action of soda, but the results were inferior, so Mitscherlich substituted calcium bisulphite and in the laboratory obtained good results. To extend this to a large-scale process, he was forced to set up his own mill, where he devised the characteristic towers for making the calcium bisulphite, in which water trickling down through packed lime met a rising current of sulphur dioxide. He was granted a patent in Luxembourg in 1874 and a German one four years later. The sulphite process did not make him rich, for there was considerable opposition to it; government objected to the smell of sulphur dioxide, forestry authorities were anxious about the inroads that might be made into the forests and his patents were contested. In 1883, with the support of an inheritance from his mother, Mitscherlich resigned his post at the Academy to devote more time to promoting his invention. In 1897 he at last succeeded in settling the patent disputes and achieving recognition as the inventor of sulphite pulp. Without this raw material, the paper industry could never have satisfied the insatiable appetite of the newspaper presses.[br]Further ReadingH.Voorn "Alexander Mitscherlich, inventor of sulphite wood pulp", Paper Maker 23(1): 41–4.LRDBiographical history of technology > Mitscherlich, Alexander
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8 умягчение воды известью и кальцинированной содой
Construction: lime and soda-ash processУниверсальный русско-английский словарь > умягчение воды известью и кальцинированной содой
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9 умягчение известью и кальцинированной содой
Ecology: lime and soda-ash processУниверсальный русско-английский словарь > умягчение известью и кальцинированной содой
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10 Dunging
A finishing process for printed cotton fabric. The cloth is passed through solutions of phosphate of lime, phosphate of soda, etc., to remove superfluous mordant, and also to fix the mordant.
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