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Method for detecting corrosive sulfur content in crude oil or fraction oil

A technology of corrosive sulfur and determination method, applied in chemical method analysis, measuring device, analysis material, etc., can solve the problem of inability to measure the content of corrosive sulfur, and achieve the effect of increasing comparability

Active Publication Date: 2006-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cannot determine the corrosive sulfur content of different distillates under the same conditions

Method used

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  • Method for detecting corrosive sulfur content in crude oil or fraction oil

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] 30 grams of distillate oil samples with a distillation range of 15 to 350° C. were introduced into a closed autoclave with stirring and temperature and pressure controllers, and the sulfur content of the samples was 4220 ppm. Add 5 grams of iron powder, heat up to the specified temperature and react for 1 hour under stirring. Then cool with air to lower the temperature in the autoclave to 150°C, and then cool the autoclave to room temperature with cooling water. The sulfur content was measured in the solution, and the results of the measurements at different reaction temperatures are shown in Table 1.

[0018] It can be seen from Table 1 that the content of corrosive sulfur is less at lower reaction temperatures, and the amount of corrosive sulfur gradually increases with the increase of temperature. When the reaction temperature is greater than 350 °C, the content of corrosive sulfur tends to Stablize. Therefore, the optimum reaction temperature for determining the c...

example 2

[0020] This example examines the influence of reaction time on the measurement results.

[0021] The content of corrosive sulfur in the distillate was measured according to the method of Example 1, and the controlled reaction temperature was 350°C. The corrosive sulfur content measured under different reaction times is shown in Table 2.

[0022] It can be seen from Table 2 that the reaction time between iron powder and oil sample is too short, and the measurement result is low due to insufficient reaction. When the reaction time exceeds 1.0 hour, prolonging the reaction time has no obvious influence on the measurement result. Therefore, the appropriate reaction time should be more than 1.0 hour.

example 3

[0024] This example examines the influence of the amount of iron powder added on the measurement results.

[0025] Measure the corrosive sulfur content of distillate oil by the method of example 1, add different amounts of iron powder respectively in distillate oil, control reaction temperature to be 350 ℃, time is 1 hour, measurement result is shown in Table 3. The data in Table 3 shows that when the amount of iron powder added is 2-10 grams, that is, when it accounts for more than 6.7% by mass of the distillate oil sample, it has no obvious influence on the determination of the corrosive sulfur content of the distillate oil.

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Abstract

The method of detecting corrosive sulfur content in crude oil or fraction oil includes making the crude oil or fraction oil react fully with metal powder at 200-400 deg c under stirring inside sealed container; and calculating the difference of sulfur content before reaction and that after reaction to determine the content of corrosive sulfur in crude oil or fraction oil. The metal powder is selected copper powder, carbon steel powder, iron powder or zinc powder. The method can determine corrosive sulfur content in crude oil or fraction oil effectively and has comparable data.

Description

technical field [0001] The invention relates to a method for determining the content of corrosive sulfur in crude oil or distillate oil, specifically, a method for measuring the content of corrosive sulfur in crude oil or distillate oil by reacting metal powder with sulfur compounds. Background technique [0002] Sulfur in crude oil or petroleum fractions not only causes environmental pollution during processing, but also severely corrodes processing equipment. In the long-term refinery practice, scientific workers have accumulated rich anti-corrosion experience, but in terms of sulfur corrosion prediction, they still have not found a simple and effective measurement method. [0003] At present, the widely used sulfur corrosion prediction method is to measure the total sulfur content in oil samples. However, the total sulfur content cannot be fully correlated with the corrosion rate of the unit. Some crude oils with low sulfur content are more corrosive than some crude oil...

Claims

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Application Information

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IPC IPC(8): G01N31/00G01N31/02G01N21/64
Inventor 田松柏杨波
Owner CHINA PETROLEUM & CHEM CORP
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