Method for the determination of hydrogen sulfide and polysulfide content in liquid sulfur

Abstract

The invention discloses a method for determining the content of hydrogen sulfide and polysulfide in liquid sulfur, and belongs to the field of chemical composition detection. The method includes: taking out a first liquid sulfur sample from a liquid sulfur mother liquor; mixing the first liquid sulfur sample with a catalyst and heating to a preset temperature to obtain a target solution; inserting a first protective gas exhaust pipe into the target solution , so that the target solution is purged by the first protective gas; the purged gas is subjected to iodometry to obtain the total hydrogen sulfide content in the first liquid sulfur sample; according to the total hydrogen sulfide content, determine the liquid The content of hydrogen sulfide and polysulfide in the sulfur mother liquor. The method is convenient to operate, not only does not need to use flammable and toxic reagents, can avoid environmental pollution, but also can prevent the health of operators from being damaged quickly, and the operation is simple, and can effectively and accurately determine the content of hydrogen sulfide and the amount of hydrogen sulfide in the liquid sulfur mother liquor. Hydrogen sulfide content.

Description

technical field [0001] The invention relates to the field of chemical composition detection, in particular to a method for determining the content of hydrogen sulfide and polysulfide in liquid sulfur. Background technique [0002] Liquid sulphur is often recovered during petroleum refining and natural gas purification. Among them, hydrogen sulfide remains in the liquid sulfur, and these residual hydrogen sulfide reacts with sulfur at high temperature to form polysulfide, which is decomposed into hydrogen sulfide and sulfur at room temperature. Once these hydrogen sulfide are released into the atmosphere, it will not only pollute the environment, but also cause damage to the health of related workers. Therefore, it is necessary to test the total hydrogen sulfide (including hydrogen sulfide and polysulfide) content in liquid sulfur to ensure that the total hydrogen sulfide content in liquid sulfur is lower than the national standard. [0003] At present, the total hydrogen s...

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Problems solved by technology

However, this method requires the use of flammable and toxic chemicals, which will not only pollute the environment, but also cause damage to the health of operators

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