Low-sulfur additive suitable for combustible gas leakage warning

Abstract

The invention provides a combustible gas leakage warning low-sulfur additive which is formed by compounding 80-90% of an odorizor, 5-20% of a synergist and 1-10% of a stabilizer, the odorizor is composed of a component A, a component B and a component C. The component A is composed of one or more of acrylic acid C1-C6 alkyl ester, butenoic acid C1-C4 alkyl ester and pentenoic acid C1-C4 alkyl ester, and the component C is composed of one or more of acrylic acid C1-C6 alkyl ester, butenoic acid C1-C4 alkyl ester and pentenoic acid C1-C4 alkyl ester. The component B is composed of an amide compound and a nitrogen-containing heterocyclic compound in a mass ratio of (0.5-3): 1, the component C is composed of one or more of thiophane, ethanethiol and dimethyl sulfide, the components can synergistically improve the odor level of the odorant, and the addition amount of the sulfur-containing component can be greatly reduced, so that the corrosion of the sulfur-containing component to equipment pipelines can be reduced, and the service life of the odorant is prolonged. The odorant composition can meet the odor grade requirement under the low concentration, and the prepared odorant composition has good stability and has a very good application prospect as a combustible gas leakage warning additive.

Description

Technical field [0001] The present invention relates to the field of environmental protection and safety technology of combustible gases, in particular to a flavoring agent for natural gas, biogas, hydrogen and other combustible gas leakage warnings. Background [0002] At present, most of the fuel gas we use is odorless in itself, and in order to ensure that it is detected in the early stage of leakage, that is, when the explosion limit has not yet been reached, it is very necessary to add a gas alarm agent with a foul odor to the gas. For example, natural gas itself is colorless and odorless, flammable and explosive, in the process of transportation or use, once the leakage is difficult to find, after adding the odorant of the gas leakage warning, even if there is a trace of leakage can be found in time to remedy. When the concentration of natural gas reaches 20% of the lower explosive limit, it should be detectable, so the addition of odorant is crucial. In the selection of g...

AI Technical Summary

Problems solved by technology

Tetrahydrothiophene (THT) is a sulfur-containing saturated heterocyclic compound, which is not easily oxidized by air, has stable chemical properties, and has a long-lasting odor. However, the molecular formula of THT contains sulfur, and the presence of sulfur is not only harmful to equipment pipelines A certain amount of corrosion, once the carbon steel pipeline that transports natural gas corrodes, it will increase the loss of tetrahydrothiophene. In addition, tetrahydrothiophene will generate sulfur dioxide after burning with fuel gas, which will cause certain pollution to the environment

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