SU70581A1 - The way of odorization of gases, devoid of smell - Google Patents

Description

When transporting and using odorless combustible gases (for example, natural), the leakage of these gases presents a significant danger, since it can be detected with great difficulty.

The accumulation of flammable gases, especially in confined areas, can lead to an explosion.

To detect the leakage of flammable gases, they are usually used to odorize them, using most often mercaptans, which are relatively expensive products, for this sang.

In the proposed method for this purpose it is meant the use of sulphate pulp production waste.

When producing cellulose from coniferous wood by the so-called; sulphate method, besides the main reaction - dissolving lignin, a number of side reactions also take place. One of these is the reaction of the interaction between methoxyl groups that split off from the lignin during the cooking process.

pami with sulfur compounds present in the cooking liquid. As a result of this reaction, the formation of methyl mercaptan, methyl sulfide, methyl disulfide and other compounds close to them occurs. All of them are relatively easily volatile, but most of them are caught along with the by-product of sulfate-cellulose production — sulphate turpentine, distributed between the upper — turpentine and lower — water condensate layer.

The above sulfur compounds are carefully separated from turpentine, as they give it a foul smell that makes turpentine in such a form completely unsuitable for any use. It is also possible to release sulfur compounds from the water layer of the condensate and to trap them from the exhaust gases.

In all these cases, the sulfur compounds can be obtained directly as a solution in the methyl alcohol formed simultaneously with them.

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According to the present invention, it is proposed to odorize flammable gases devoid of zaiah, to use a head slurry of sulphate turpentine and a mixture of sulfur compounds separated from the water layer of condensate and from the gaseous products of sulphate cooking. For the odorization, either these mixtures may be used with celp, or the individual compounds contained in them, or groups of them.

The invention of the method of odorizing gases that are odorless, for example, natural combustible gases, using compounds containing sulfur, characterized in that sulfur-containing sulfate pulp production wastes as an odorant, for example, sulfate turpentine sweep gas production.