Synthesis of carbon monoxide

Preparation of carbon monoxide

Preparation of carbon monoxide from formic acid and sulfuric acid

Carbon monoxide  is obtained by removing water from the formic acid with concentrated sulfuric acid.

Preparation of carbon monoxide

Preparation of carbon monoxide

Due to the toxicity of carbon monoxide) work is done in well-ventilated  hood. Flask with concentrated sulfuric acid with the stopper inserted for the gas outlet and a dropping funnel for the formic acid. Flask with acid is heated to about 100° C and 98% formic acid is added. Carbon monoxide release rate is adjusted by formic acid addition rate. The reaction slows down when sulfuric acid becomes diluted. Then the flask is gently heated. Carbon monoxide is purified (to remove carbon dioxide) and dried by passing through solid potassium hydroxide and calcium chloride. Carbon monoxide is a colorless, toxic gas with the boiling point – 190 °C, and melting point of -207 °C. Slightly soluble in water.

Handbook of preparative inorganic chemistry, by G. G. Schlessinger, 1963, 645-646.

Preparation of carbon monoxide from oxalic acid and sulfuric acid

Preparation of carbon monoxide from oxalic acid and sulfuric acid

Preparation of carbon monoxide from oxalic acid and sulfuric acid

Carbon monoxide is prepared by gently heating commercial oxalic acid in a round bottom flask with an excess of concentrated sulfuric acid. The sulfuric acid exerts a dehydrating action and a mixture of carbon monoxide and carbon dioxide is evolved. The obtained gases are passed through potassium or sodium hydroxide solution which absorbs the carbon dioxide. Additionally obtained carbon monoxide is dried by passing through concentrated sulfuric acid.

Handbook of preparative inorganic chemistry, by G. G. Schlessinger, 1963, 645-646.

Preparation of carbon monoxide from potassium ferrocyanide and sulfuric acid

A mixture of finely powdered potassium ferrocyanide with eight or ten times its weight of concentrated sulfuric acid is heated in a flask. Carbon monoxide is obtained by the following reaction:

Preparation of carbon monoxide from potassium ferrocyanide and sulfuric acid

Preparation of carbon monoxide from potassium ferrocyanide and sulfuric acid

If the heat is carefully regulated the evolution of gas is gentle and regular. The product, however, is liable to contain carbon dioxide and cyanogen compounds, which are separated by washing with potassium or sodium hydroxide solution and finally dried by passing through concentrated sulfuric acid. 45 g of pulverized potassium ferrocyanide are mixed with 300 ml of concentrated sulphuric acid in a 2 l flask. The flask is closed with a three-holed rubber stopper, carrying a thistle-tube extending below the liquid in the flask, a glass elbow, and a thermometer, the bulb of which is immersed in the liquid. The issuing gas is conducted through a gas washing-bottle containing potassium hydroxide, followed by a U-tube containing soda-lime.

A glass apparatus for the preparation of carbon monoxide

A glass apparatus for the preparation of carbon monoxide

The flask is gradually heated and the temperature maintained at 170° C, where a very regular evolution of the gas will be obtained. The pure gas issuing from the soda-lime tube may be ignited or collected in jars. On removing the flame and allowing the contents of the flask to cool, the evolution of gas ceases. By heating the mixture again to 170° C, even after long standing, a steady evolution of carbon monoxide is obtained. If the temperature is not allowed to rise above 175°, no difficulty in the preparation of the gas by this method will be experienced.

Chemical lecture experiments, by F. G. Benedict, 298-300, 1916.

Preparation of carbon monoxide from  carbon dioxide and carbon

Preparation of carbon monoxide from carbon dioxide and carbon

Preparation of carbon monoxide from carbon dioxide and carbon

Carbon dioxide, when passed over heated carbon, becomes reduced to carbon monoxide. Coarsely pulverized charcoal is placed in a 30 cm. length of combustion-tubing, and a gentle current of dry carbon dioxide is conducted through the tube, which is strongly heated with a four-tube burner.

A glass apparatus for the preparation of carbon monoxide

A glass apparatus for the preparation of carbon monoxide

The issuing gas is conducted through a U-tube containing soda-lime, and issues through a vertical piece of glass tubing, which serves as a jet. The gas issuing from the jet, when ignited, burns with a blue flame. The gas may be collected in cylinders at the pneumatic trough. A large flame is obtained by filling a liter cylinder with the gas and, after igniting it, pouring water rapidly into the cylinder.

Chemical lecture experiments, by F. G. Benedict, 296-297, 1916.

 

IUPAC Name

carbon monoxide

InChI

InChI=1S/CO/c1-2

InChI Key

UGFAIRIUMAVXCW-UHFFFAOYSA-N

Canonical SMILES

[C-]#[O+]

MeSH Synonyms

Carbon Monoxide, Monoxide, Carbon

Depositor-Supplied Synonyms

carbon monoxide, carbon monooxide, Carbonic oxide, Carbon oxide (CO), 630-08-0, Exhaust gas, Flue gas, carbon(II) oxide, Kohlenoxyd [German], Koolmonoxyde [Dutch], Kohlenmonoxid [German], Wegla tlenek [Polish], Oxyde de carbone [French], Carbone (oxyde de) [French], UNII-7U1EE4V452, HSDB 903, Carbonio (ossido di) [Italian], CHEBI:17245, EINECS 211-128-3, NA9202, UN1016, Carbon monoxide 10% by volume or more, monoxide, Carbonous oxide, methanidylidyneoxidanium, Carbon monoxide (USAN), ACMC-1B3LA, Carbon monoxide, compressed, AC1L18VY, [CO], 295116_ALDRICH, CHEMBL1231840, 60870_FLUKA, CTK0I2914, 7U1EE4V452, LS-52213, LS-187194, TC-167536, C00237, D09706, 3B4-2270, Carbon monoxide, compressed [UN1016] [Poison gas], Carbon monoxide, compressed [UN1016] [Poison gas], Carbon monoxide, refrigerated liquid (cryogenic liquid), Carbon monoxide, refrigerated liquid (cryogenic liquid) [NA9202] [Poison gas], Carbon monoxide, refrigerated liquid (cryogenic liquid) [NA9202] [Poison gas], 153929-54-5, 155399-52-3, 162342-48-5, 167416-30-0, 18421-60-8, 192819-80-0, 724693-69-0, 740776-49-2, 807306-74-7, 82063-46-5, C#O

Removed Synonyms

Carbon oxide, carbonyl, Kohlenmonoxid, Kohlenoxyd, Koolmonoxyde, Wegla tlenek, Oxyde de carbone, Monoxide, Carbon, Carbone (oxyde de), CARBONMONOXIDE, Carbonio (ossido di), FORMYL GROUP, Carbon monoxide C 11 (USP), CID281, c0369, D002248, CO, 124-38-9, 12795-06-1, CMO, FOR

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