Cylinders hydrogen chloride

The checkers used hydrogen chloride from one of the cylinders of hydrogen chloride now available commercially. 

Amines can also be purified via their salts, e.g. hydrochlorides. A solution of the amine in dry toluene, diethyl ether, dichloromethane or chloroform is saturated with dry hydrogen chloride (generated by addition of concentrated sulfuric acid to dry sodium chloride, or to concentrated HCl followed by drying the gas through sulfuric acid, or from a hydrogen chloride cylinder) and the insoluble hydrochloride is filte off and dissolved in water. The solution is made alkaline and the amine is extracted, as above. Hydrochlorides can also be prepared by dissolving the amine in ethanolic HCl and adding diethyl ether or petroleum ether. Where... 

Hydrogen chloride [7647-01-0] M 36.5. Passed through cone H2SO4, then over activated charcoal and silica gel. Fumes in moist air. Hydrogen chloride in gas cylinder include ethylene, 1,1-dichloroethane and ethyl chloride. The latter two may be removed by fractionating the HCl through a trap cooled to -112°. Ethylene is difficult to remove. Fumes in moist air. HARMFUL VAPOURS. 

The hydrogen chloride may be generated by the method described in Organic Syntheses, Coll. Vol. 1, 293 (1941). It should be dried by passage through concentrated sulfuric acid. The hydrogen chloride may be taken directly from a cylinder, if one is available. 

Commercial hydrogen chloride from a cylinder is dried by passage through a train consisting of a wash bottle of concentrated sulfuric acid, a 25-cm. calcium chloride tube, and finally an empty safety trap. 

This is of more significance in corrosive or polymer-forming services than in clean hydrocarbon or air applications. For example in hydrogen chloride and chlorine service using cylinders with either (a) cast iron liners or (b) carbon piston rings, a speed of around 600 ft per min is acceptable. 

A sample of hydrogen chloride gas, HC1, is being collected by bubbling it through liquid benzene into a graduated cylinder. Assume that the molecules pictured as spheres show a representative sample of the mixture of HC1 and benzene vapor ( represents an HCl molecule and O a benzene molecule), (a) Use the figure to determine the mole fractions of HCl and benzene vapor in the gas inside the container, (b) What are the partial pressures of HCl and benzene in the container when the total pressure inside the container is 0.80 atm ... 

The checkers used a cooling bath prepared from ice and sodium chloride and dried the hydrogen chloride obtained from a compressed-gas cylinder by passing the gas through a trap filled with concentrated sulfuric acid. 

Hydrogen chloride gas from a cylinder is most convenient however, it may be generated if desired.2... 

Hydrogen chloride gas is most conveniently obtained in a cylinder which should be connected to the outlet tube through a safety trap. It can be generated if desired.4... 

What is the purpose of the cylinder with the saturated sodium chloride solution Why is no wash bottle with water used in the given apparatus Will the liquid chlorine be contaminated with hydrogen chloride ... 

The alcoholic hydrogen chloride can be prepared by passing hydrogen chloride from a cylinder (use safety trap) into 200 ml. of absolute ethanol cooled by an ice bath. From time to time a sample may be withdrawn and titrated with standard alkali to determine the concentration. The exact amount is not critical, but a considerable excess of hydrogen chloride must be used. If several runs are to be made it is convenient to prepare a large quantity of alcoholic hydrogen chloride at one time. 

A cylinder of compressed hydrogen chloride is useful, although a conventional hydrochloric acid-sulfuric acid generator will suffice. 

Trace impurities in some gases used for semiconductor processing have also been monitored using ICP-MS [380-382]. It may be necessary to use specialized materials for the sampler and skimmer to prevent degradation. In one study, the level of iron from a hydrogen chloride cylinder was found to increase as the cylinder was used and to depend on the cylinder-valve package [382]. 

It is well known that anhydrous nonoxidizing inorganic acids such as hydrogen chloride and hydrogen bromide do not dissolve metals. These two compounds are stored in steel cylinders without any appreciable corrosion of the metal. The same was true of anhydrous hydrogen fluoride that was stored and delivered in steel cylinders for the past seven decades. 

---