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Method for Determination of Hydrogen Sulfide Concentration in Liquid Sulfur

A technology of concentration determination and hydrogen sulfide, applied in the direction of electrochemical variables of materials, etc., can solve the problems of low accuracy of calculation results, difficulty in heat preservation, constant temperature, long operation and analysis time, etc. The effect of accurate data

Active Publication Date: 2015-08-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide an operating Stable, reduce working time, improve the accuracy of measurement data of hydrogen sulfide concentration determination method in liquid sulfur

Method used

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  • Method for Determination of Hydrogen Sulfide Concentration in Liquid Sulfur

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: (1) Weigh 100 grams of sulfur sample with the dried gas washing bottle, add 90 mg of diisopropanolamine accordingly, place the washing bottle in hot oil at 130°C for an oil bath, and the oil bath time is 20 minutes ;

[0021] (2) In order to prevent the sulfur-containing gas in the liquid sulfur from escaping, connect a conical flask to the outlet of the gas washing bottle, and transfer 20 ml of 15% iodine standard solution into the conical flask in advance with a pipette;

[0022] (3) After the sulfur is dissolved, add nitrogen gas into the gas washing bottle and stir, adjust the flow rate to 500 ml / min, and carry out stripping for 30 minutes;

[0023] ⑷. Remove the gas washing cylinder and stop the gas lift. Rinse the receiving socket and pipeline with distilled water, and collect the flushing liquid;

[0024] ⑸. Fill the burette with silver nitrate solution with a concentration of 0.01 mol / ml, and add 5 ml of concentrated ammonia water int...

Embodiment 2

[0029] Embodiment two: The operation steps carried out in embodiment two are the same as the operation steps carried out in embodiment one, the amount of sulfur sample described in the steps is 100 grams, and the addition of diisopropanolamine is 100 mg;

[0030] Described oil bath temperature is 140 ℃, and oil bath time is 20 minutes;

[0031] Described iodine standard solution is 20%, and volume is 15 milliliters;

[0032] The concentration of the silver nitrate solution is: 0.008 mol / ml.

Embodiment 3

[0033] Embodiment three: The operation steps carried out in embodiment three are the same as the operation steps carried out in embodiment one, the amount of sulfur sample described in the steps is 100 grams, and the addition of diisopropanolamine is 110 mg;

[0034] Described oil bath temperature is 150 ℃, and oil bath time is 30 minutes;

[0035] Described iodine standard solution is 18%, and volume is 20 milliliters;

[0036] The concentration of described silver nitrate solution is: 0.012 mol / ml .

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Abstract

The invention relates to a method for determining the hydrogen sulfide concentration in liquid sulfur, which comprises the following steps that: M gramme of proper sulfur products are weighed by a dried aspirator bottle, diisopropanolamine is correspondingly added, the aspirator bottle is placed into hot oil for oil bath steam extraction, nitrogen gas is added for stirring, flushing liquid is collected, silver nitrate solution is used for titration, the consumption volume of silver nitrate standard solution and the level value of an automatic potentiostat are recorded, the level value read during each time of titration and the milliliter number of the consumed silver nitrate standard solution are used for making a standard curve pattern, the middle point of the part with the maximum standard curve radian value change is used as a terminal titration point, the volume V of the silver nitrate consumed by the titration is obtained, and the hydrogen sulfide content in the liquid sulfur can be obtained through calculation. The method has the advantages that the diisopropanolamine is adopted for promoting the resolution of the hydrogen sulfide in the liquid sulfur, the steam extraction time is shortened to less than 0.5hour from the original 4hours, in addition, the hydrogen sulfide content is worked out according to the titration volume, the method is simple, and the detecting results are accurate and reliable.

Description

technical field [0001] The invention relates to a method for measuring the concentration of hydrogen sulfide in liquid sulfur, which belongs to the technical field of measuring the concentration of hydrogen sulfide in liquid sulfur in petrochemical production. Background technique [0002] At present, in the process of natural gas purification, it is necessary to desulfurize the natural gas. The liquid sulfur released requires that the hydrogen sulfide content in the liquid sulfur must be controlled below 10PPM, otherwise there will be unfavorable factors such as equipment corrosion and unqualified sulfur products. In order to measure the content of hydrogen sulfide in liquid sulfur, the American BV company (BLACK & VEAPCH COMPANY) invented a method for measuring the concentration of hydrogen sulfide in liquid sulfur. The operation steps and technological process of this method are: (1) take a certain amount of sulfur sample with a round bottom flask after drying, and put i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/42
Inventor 尹琦岭兰宦勤严长青闵峰王校东马凡解更存
Owner CHINA PETROLEUM & CHEM CORP