Carbon monoxide boiling point

Carbon monoxide (melting point -199°C, boiling point -191.5°C) is one of the chief constituents of synthesis gas (carbon monoxide plus hydrogen). It is obtained in pure form through cryogenic procedures, with hydrogen as a coproduct. 

If, however, the ammonia plant is obtaining nitrogen from an air separation plant, carbon monoxide and carbon dioxide (boiling points —205°C and sublimation temperature —78.5°C, respectively) may be condensed and removed by scrubbing with liquid nitrogen. 

Carbon Monoxide Process. This process involves the insertion of carbon monoxide [630-08-0] into a chloroacetate. According to the hterature (34) in the first step ethyl chloroacetate [105-39-5] reacts with carbon monoxide in ethanol [64-17-5] in the presence of dicobalt octacarbonyl [15226-74-1], Co2(CO)g, at typical temperature of 100°C under a pressure of 1800 kPa (18 bars) and at pH 5.7. Upon completion of the reaction the sodium chloride formed is separated along with the catalyst. The ethanol, as well as the low boiling point components, is distilled and the nonconverted ethyl chloroacetate recovered through distillation in a further column. The cmde diethyl malonate obtained is further purified by redistillation. This process also apphes for dimethyl malonate and diisopropyl malonate. 

Carbon monoxide (CO) is a colorless and odorless gas molecule. This inorganic compound, at standard temperature and pressure, is chemically stable with low solubility in water but high solubility in alcohol and benzene. Incomplete oxidation of carbon in combustion is the major source of environmental production of CO. When it burns, CO yields a violet flame. The specific gravity of CO is 0.96716 with a boiling point of -190°C and a solidification point of-207°C. The specific volume of CO is 13.8 cu ft/lb (70°F). 

Acrylic acid (CH2=CHC02H, melting point 13.5°C, boiling point 141°C, density 1.045, flash point 68°C) and acrylates were once prepared by reaction of acetylene and carbon monoxide with water or an alcohol, with nickel carbonyl as catalyst. 

Covalent compounds have a wider variety of properties than ionic compounds. Some dissolve in water, and some do not. Some conduct electricity when molten or dissolved in water, and some do not. If you consider only covalent compounds that contain bonds with an electronegativity difference that is less than 0.5, you will notice greater consistency. For example, consider the compounds carbon disulfide, CS2, dichlorine monoxide, C120, and carbon tetrachloride, CC14. What are some of the properties of these compounds They all have low boiling points. None of them conducts electricity in the solid, liquid, or gaseous state. 

Recently carbonyl fluoride has also been prepared and studied. It is a colourless gas obtained by the action of silver fluoride on carbon monoxide. Because of its great sensitivity to water and its low boiling point (— 83° C.) it appears improbable that it would give satisfactory service as a war gas. 

Yields from the formamide condensations of 4-aminotriazole-5-carbox-amides were improved by use of fixed-temperature baths maintained (usually) at 220°C, - rather than by relying on the boiling point of formamide, variously given as 195 and 210°C, but actually masked by the copious escape of ammonia and carbon monoxide. Thanks to this precaution, the yield of 9-benzyl-8-azapurin-6-one, for example, was raised from 77 to 95% ... 

Calculate the enthalpy change when 2.38 g carbon monoxide (CO) vaporizes at its normal boiling point. Use data from Table 12.2. 

Zinc production follows a similar path to the iron and lead processes in which carbon monoxide from carbon is the reducing agent. Carbon (coke or charcoal) is blended with zinc oxide and fed to a retort. The boiling point of pure zinc is low ( 900°C), so as the carbon is burned to form CO, the direct reduction of the zinc oxide by CO will result in the direct volatilization of the zinc. Cooling the vapor will condense the zinc, which can then be cast into ingots or alloyed with other metals. 

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