Catalytic Dehydrogenation of Isopropyl Alcohol*

1930 ◽  
Vol 19 (6) ◽  
pp. 570-571
Author(s):  
W.A. Lott ◽  
W.G. Christiansen
Keyword(s):  
Isopropyl Alcohol ◽  
Catalytic Dehydrogenation

scholarly journals On the catalytic dehydrogenation of alcohols

1921 ◽  
Vol 99 (697) ◽  
pp. 153-162 ◽  
Keyword(s):  
Ethyl Alcohol ◽  
Isopropyl Alcohol ◽  
Equilibrium Constants ◽  
Thermal Dissociation ◽  
Copper Surface ◽  
Mass Action ◽  
Industrial Processes ◽  
Catalytic Dehydrogenation ◽  
Organic Substances

In spite of the numerous industrial processes developed for the hydrogenation of various organic substances with the aid of catalytic materials, but little work has been accomplished on the determination of the mass action equilibrium constants of organic substances which undergo thermal dissociation. Thus in the dissociation of ethyl alcohol into acetaldehyde and hydrogen, or of isopropyl alcohol into acetone and hydrogen, two reactions widely employed, the dependance of the degree of the dissociation on the temperature is unknown. Sabatier (‘La Catalyse en Chimie Organique’) states (p. 82) that acetaldehyde is easily hydrogenated at 140°C. and acetone at a temperature of 115° to 125°C. utilising nickel as a catalytic agent. At higher temperatures, however, 200° to 350°C., acetone is not hydrogenated to isopropyl alcohol, but methyl isobutylketone and diisobutylketone are produced. Again (p. 161) ethyl alcohol undergoes rapid dehydrogenation at a copper surface within the temperature range 200° to 350°C.; at 420°C. the acetaldehyde produced undergoes decomposition. Isopropyl alcohol in contact with the same catalytic agent slowly commences to undergo dehydrogenation at 150°C., dehydrogenation being rapid at 250° to 430°C.

TEM study of order, structure and defects of β and martensite in Cu-Al-Mn shape memory alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 188-189
Author(s):  
J.M. Guilemany ◽  
F. Peregrin
Keyword(s):  
Shape Memory ◽  
Orthophosphoric Acid ◽  
Isopropyl Alcohol ◽  
Metastable Phase ◽  
Characteristic Temperature ◽  
Ethanol Solution ◽  
Order Structure ◽  
Thin Foils ◽  
Polycrystalline Alloys ◽  
Diamond Saw

The shape memory effect (SME) shown by Cu-Al-Mn alloys stems from the thermoelastic martensitic transformation occuring between a β (L2,) metastable phase and a martensitic phase. The TEM study of both phases in single and polycrystalline Cu-Al-Mn alloys give us greater knowledge of the structure, order and defects.The alloys were obtained by vacuum melting of Cu, Al and Mn and single crystals were obtained from polycrystalline alloys using a modified Bridgman method. Four different alloys were used with (e/a) ranging from 1.41 to 1.46 . Two different heat treatments were used and the alloys also underwent thermal cycling throughout their characteristic temperature range -Ms, Mf, As, Af-. The specimens were cut using a low speed diamond saw and discs were mechanically thinned to 100 μm and then ion milled to perforation at 4 kV. Some thin foils were also prepared by twin-jet electropolishing, using a (1:10:50:50) urea: isopropyl alcohol: orthophosphoric acid: ethanol solution at 20°C. The foils were examinated on a TEM operated at 200 kV.

Development of reference materials with the composition of propyl and isopropyl alcohol solutions

2020 ◽  
pp. 66-72
Author(s):  
Irina A. Piterskikh ◽  
Svetlana V. Vikhrova ◽  
Nina G. Kovaleva ◽  
Tatyana O. Barynskaya
Keyword(s):  
Reference Materials ◽  
Measurement Errors ◽  
Isopropyl Alcohol ◽  
Certified Reference Materials ◽  
Toxic Substances ◽  
Biological Objects ◽  
Margin Of Error ◽  
Measurement Results ◽  
And Control ◽  
Characteristic Mass

Certified reference materials (CRM) composed of propyl (11383-2019) and isopropyl (11384-2019) alcohols solutions were created for validation of measurement procedures and control of measurement errors of measurement results of mass concentrations of toxic substances (alcohol) in biological objects (urine, blood) and water. Two ways of establishing the value of the certified characteristic – mass consentration of propanol-1 or propanol-2 have been studied. The results obtained by the preparation procedure and comparison with the standard are the same within the margin of error.

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