Raschign.

Brit.

/ˈrɑːʃɪɡ/,

/ˈraʃɪɡ/, U.S.

/ˈræʃɪɡ/

Forms: also with lower-case initial.

Origin: From a proper name. Etymon: proper name Raschig.

Etymology: < the name of Friedrich August Raschig (1863–1928), German chemist.

Chemistry.

1. Raschig ring n. (also Raschig's ring) a small cylindrical ring usually made of glass, metal, or ceramic material, and used in large numbers as packing in towers and columns for fractionation, solvent extraction, etc.The use of such rings was introduced by Raschig.

ΘΚΠ

the world > matter > chemistry > equipment or apparatus > [noun] > miscellaneous apparatus

bain1477

speculum1650

filtering paper1651

wheel-fire1662

filter paper1670

sun furnace1763

respirator1789

candle-ball1794

rectifier1822

candle-bomb1823

filter1823

oxyhydrogen blowpipe1823

shade1837

graduator1839

pipette1839

thistle funnel1849

pressure tube1852

ozonizer1858

dialyser1861

Liebig condenser1861

Sprengel pump1866

Sprengel tube1866

water softener1867

mercury pump1869

Bunsen burner1870

dialysator1877

test-mixer1877

tube-condenser1877

Kipp1879

reflux condenser1880

policeman1888

converter1889

pressure boiler1891

spot plate1896

hydrogen electrode1898

sampler1902

reactor1903

fume-chamber1905

Permutit1910

microburner1911

salt bridge1915

precipitator1919

Raschig ring1920

microneedle1921

titrator1928

laboratory coatc1936

spray tower1937

precipitron1938

ion exchanger1941

potentiostat1942

chemostat1950

Knudsen pipette1951

pH-stat1956

cryopump1958

1920 Chem. Abstr. 14 2054 Attention is directed to the advantages attained by the use of Raschig's rings as a filling material for absorption towers in the manuf. of H₂SO₄, HNO₃, HCl, etc.

1947 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. I. 16 Raschig rings have the greatest number of applications because they provide a large effective surface of contact between the gas and the liquid phases and they have a large free volume.

1959 R. J. Hengstebeck Petroleum Processing xi. 265 Modern furfural extraction columns contain about 40 to 50 ft of Raschig rings.

1991 Hydrocarbon Processing May 90/2 The aftercooler contained one 40-ft-bed packed with 2-in. ceramic Raschig rings.

2. Raschig process n. any of various industrial processes developed by Raschig, spec. (a) a process for the industrial production of phenol in which benzene vapour is heated with hydrogen chloride and air over a copper-containing catalyst to yield chlorobenzene, which is then hydrolysed to yield phenol; (b) a process for the industrial production of hydrazine from sodium hypochlorite and ammonia; (c) a process for the industrial production of hydroxylamine in which ammonium nitrate is converted to hydroxylamine disulphonate and then to hydroxylamine sulphate.

ΘΚΠ

the world > matter > chemistry > organic chemistry > chemical processes or reactions > processes or reactions attributed to chemists > [noun] > others

Skraup1886

Friedel–Crafts1892

Schotten–Baumann method1895

Cannizzaro1897

Grignard('s) reaction1904

Liebermann–Burchard reaction1904

Raschig process1920

Fischer–Tropsch1933

Schmidt reaction1937

1920 Gas World 79 118/2 A large number of these plants [for the distillation of coal tar] have been installed on the Continent, and their success is such that the Raschig process may most certainly be regarded as being permanently established.

1940 Chem. & Engin. News 10 Nov. 921/1 The unit, which has been in continuous operation for four months.., employs the Raschig process, a catalytic vapor-phase system for the chlorination of benzene and the hydrolysis of the chlorobenzene produced. The process, invented by Prahl and Mathes of the Raschig organization, Ludwigshafen, Germany, produces a phenol purer than U.S.P.

1951 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. VII. 572 The oxidation of ammonia by hypochlorite is the basis of the Raschig process, which is today used for the commercial production of hydrazine.

1982 Industr. Engin. Chem. Process Dev. 21 211/1 Technical solutions of hydroxylamine are made by the Raschig process.

1982 Chem. Week (Nexis) 6 Jan. 28 The traditional Raschig process involves the reaction of ammonia and sodium hypochlorite to form chloramine, which then reacts with excess ammonia to form hydrazine.

1991 O. T. Benfey tr. F. Aftalion Hist. Internat. Chem. Industry iv. 172 Synthetic phenol was obtained either through benzene sulfonation..or through hydrolysis of monochlorobenzene by the Raschig process.

This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022).

单词	raschig
释义	Raschign. Brit. /ˈrɑːʃɪɡ/, /ˈraʃɪɡ/, U.S. /ˈræʃɪɡ/ Forms: also with lower-case initial. Origin: From a proper name. Etymon: proper name Raschig. Etymology: < the name of Friedrich August Raschig (1863–1928), German chemist. Chemistry. 1. Raschig ring n. (also Raschig's ring) a small cylindrical ring usually made of glass, metal, or ceramic material, and used in large numbers as packing in towers and columns for fractionation, solvent extraction, etc.The use of such rings was introduced by Raschig. ΘΚΠ the world > matter > chemistry > equipment or apparatus > [noun] > miscellaneous apparatus bain1477 speculum1650 filtering paper1651 wheel-fire1662 filter paper1670 sun furnace1763 respirator1789 candle-ball1794 rectifier1822 candle-bomb1823 filter1823 oxyhydrogen blowpipe1823 shade1837 graduator1839 pipette1839 thistle funnel1849 pressure tube1852 ozonizer1858 dialyser1861 Liebig condenser1861 Sprengel pump1866 Sprengel tube1866 water softener1867 mercury pump1869 Bunsen burner1870 dialysator1877 test-mixer1877 tube-condenser1877 Kipp1879 reflux condenser1880 policeman1888 converter1889 pressure boiler1891 spot plate1896 hydrogen electrode1898 sampler1902 reactor1903 fume-chamber1905 Permutit1910 microburner1911 salt bridge1915 precipitator1919 Raschig ring1920 microneedle1921 titrator1928 laboratory coatc1936 spray tower1937 precipitron1938 ion exchanger1941 potentiostat1942 chemostat1950 Knudsen pipette1951 pH-stat1956 cryopump1958 1920 Chem. Abstr. 14 2054 Attention is directed to the advantages attained by the use of Raschig's rings as a filling material for absorption towers in the manuf. of H₂SO₄, HNO₃, HCl, etc. 1947 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. I. 16 Raschig rings have the greatest number of applications because they provide a large effective surface of contact between the gas and the liquid phases and they have a large free volume. 1959 R. J. Hengstebeck Petroleum Processing xi. 265 Modern furfural extraction columns contain about 40 to 50 ft of Raschig rings. 1991 Hydrocarbon Processing May 90/2 The aftercooler contained one 40-ft-bed packed with 2-in. ceramic Raschig rings. 2. Raschig process n. any of various industrial processes developed by Raschig, spec. (a) a process for the industrial production of phenol in which benzene vapour is heated with hydrogen chloride and air over a copper-containing catalyst to yield chlorobenzene, which is then hydrolysed to yield phenol; (b) a process for the industrial production of hydrazine from sodium hypochlorite and ammonia; (c) a process for the industrial production of hydroxylamine in which ammonium nitrate is converted to hydroxylamine disulphonate and then to hydroxylamine sulphate. ΘΚΠ the world > matter > chemistry > organic chemistry > chemical processes or reactions > processes or reactions attributed to chemists > [noun] > others Skraup1886 Friedel–Crafts1892 Schotten–Baumann method1895 Cannizzaro1897 Grignard('s) reaction1904 Liebermann–Burchard reaction1904 Raschig process1920 Fischer–Tropsch1933 Schmidt reaction1937 1920 Gas World 79 118/2 A large number of these plants [for the distillation of coal tar] have been installed on the Continent, and their success is such that the Raschig process may most certainly be regarded as being permanently established. 1940 Chem. & Engin. News 10 Nov. 921/1 The unit, which has been in continuous operation for four months.., employs the Raschig process, a catalytic vapor-phase system for the chlorination of benzene and the hydrolysis of the chlorobenzene produced. The process, invented by Prahl and Mathes of the Raschig organization, Ludwigshafen, Germany, produces a phenol purer than U.S.P. 1951 R. E. Kirk & D. F. Othmer Encycl. Chem. Technol. VII. 572 The oxidation of ammonia by hypochlorite is the basis of the Raschig process, which is today used for the commercial production of hydrazine. 1982 Industr. Engin. Chem. Process Dev. 21 211/1 Technical solutions of hydroxylamine are made by the Raschig process. 1982 Chem. Week (Nexis) 6 Jan. 28 The traditional Raschig process involves the reaction of ammonia and sodium hypochlorite to form chloramine, which then reacts with excess ammonia to form hydrazine. 1991 O. T. Benfey tr. F. Aftalion Hist. Internat. Chem. Industry iv. 172 Synthetic phenol was obtained either through benzene sulfonation..or through hydrolysis of monochlorobenzene by the Raschig process. This entry has been updated (OED Third Edition, December 2008; most recently modified version published online March 2022). < n.1920
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