Method for determining content of hydrogen sulfide and hydrogen polysulfide in liquid sulfur

Abstract

The invention discloses a method for determining the content of hydrogen sulfide and hydrogen polysulfide in liquid sulfur, and belongs to the field of chemical component detection. The method comprises the following steps: taking out a first liquid sulfur sample from a liquid sulfur mother solution; 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 first protective gas purges the target solution; carrying out iodometry determination on the purged gas to obtain the total hydrogen sulfide content in the first liquid sulfur sample; and determining the contents of hydrogen sulfide and hydrogen polysulfide in the liquid sulfur mother solutionaccording to the total hydrogen sulfide content. The method is convenient to operate, combustible and toxic reagents are not needed, environmental pollution can be avoided, physical health of operators can be prevented from being damaged, operation is easy, and the content of hydrogen sulfide and the content of hydrogen polysulfide in the liquid sulfur mother solution can be effectively and accurately measured.

Description

technical field [0001] The invention relates to the field of chemical component detection, in particular to a method for measuring the content of hydrogen sulfide and polyhydrogen sulfide in liquid sulfur. Background technique [0002] Liquid sulfur is commonly 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 hydrogen polysulfide, and hydrogen polysulfide decomposes into hydrogen sulfide and sulfur at room temperature. Once the hydrogen sulfide is discharged into the atmosphere, it will not only pollute the environment, but also cause damage to the health of relevant workers. Therefore, it is necessary to detect the content of total hydrogen sulfide (including hydrogen sulfide and hydrogen polysulfide) in liquid sulfur to ensure that the content of total hydrogen sulfide in liquid sulfur is lower than the national sta...

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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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