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Processes for removing hydrogen sulfide from refined hydrocarbon streams

a technology of hydrocarbon stream and hydrogen sulfide, which is applied in the direction of hydrocarbon oil treatment, thermal non-catalytic cracking, fuels, etc., can solve the problems of increased corrosion rate of hydrocarbon processing, high corrosive and poisonous in very small concentrations, and troughing of processing or refinery equipment, so as to reduce the amount of hydrogen sulfide and reduce the amount of corrosion

Inactive Publication Date: 2011-02-10
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The various embodiments provide an improved hydrogen scavenging process for refined hydrocarbon streams that reduces hydrogen sulfide while minimizing corrosion to processing equipment.

Problems solved by technology

Hydrocarbon media, such as a refined hydrocarbon stream, may contain hydrogen sulfide, which is highly corrosive and poisonous in very small concentrations.
The risk of exposure to hydrogen sulfide from handling hydrocarbon media is a health and safety concern during storage, transportation (shipping, truck or pipeline) and processing.
These byproducts can lead to increased corrosion rates during hydrocarbon processing.
This acidic aqueous phase is highly corrosive and can cause troughing in the processing or refinery equipment.

Method used

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  • Processes for removing hydrogen sulfide from refined hydrocarbon streams
  • Processes for removing hydrogen sulfide from refined hydrocarbon streams
  • Processes for removing hydrogen sulfide from refined hydrocarbon streams

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043]Glyoxal is an aqueous-based compound having a pH from about 2 to about 3. When dispersed in refined hydrocarbon streams, it will eventually settle out of the refined hydrocarbon streams into an acidic aqueous phase and settle to the bottom of processing equipment causing corrosion. To test the efficiacy of the corrosion inhibitor for reducing corrosion, the corrosion test was simulated in water.

[0044]Two metal coupons of Carbon C010 steel were weighed and added to two spindles mounted on a stirring shaft in an 800 ml Auto-Clave. The metal coupons were 180° from each other. The stirring shaft was placed into water and stirred at the revolutions per minute as shown in Table 1. The revolutions per minute were used to calculate the approximate flow through a pipeline and are shown in Table 1. A corrosion inhibitor was added to the water at room temperature in the amounts shown in Table 1. 15 minutes later, glyoxal was injected into the water in the amounts shown in Table 1. The Au...

example 2

[0046]Additional corrosion tests were performed on organic soluble corrosion inhibitors and were conducted in water in accordance with Example 1. Results are shown in Table 2.

TABLE 2CorrosionGlyoxal1InhibitorCorrosion(ppm by(ppm byRateSamplevolume)Corrosion Inhibitorvolume)(MPY)CE-3500NoneNone91.71500Oleic acid Pyrmidine and10039.2Dimer / Trimer Acid (3:1 wtratio)2CE-4500Dimer / Trimer acid32551.82500Oleic acid Imidazoline42517.33500Oleic acid Imidazoline and2423.3Dimer / Trimer Acid (3:1 wt.Ratio)4500Oleic acid Imidazoline and10014.0Hydroxyacetic acid (3:1 wtratio)55500Oleic acid Pyrimidine610010.01Glyoxal used contains 2% by weight quaternary ammonium catalyst and is available commercially as S-1750 from GE Water.2Available commercially as Philmplus ™ 5K 1642 from GE Water.3Available commercially as Sylvadym ® T-18 from Sylvachem Corp.4Available commercially as CI-11C from GE Water.5Available commercially as 5K2S from GE Water.6Available commercially as 5K7 from GE Water.

[0047]The organ...

example 3

[0048]Corrosion experiments and hydrogen sulfide scavenging were tested in a mixture of oil gas and water in an 800 ml Auto-Clave. The gas oil was initially spiked with an approximate 0.5 wt. % solution of H2S in kerosene before being mixed with the water. Two metal coupons of Carbon C1010 steel were weighed and added to two spindles mounted on a stirring shaft. The metal coupons were 180° from each other. The stirring shaft was placed into the gas oil and water mixture and stirred at 300 rpm. The mixture of oil gas and water was 200 ml of gas oil and 400 ml of water. The 2:1 volume ratio of water to gas oil ensured that the coupons were always immersed in water @ 300 rpm to test the corrosion in an aqueous phase. A corrosion inhibitor was added to the gas oil mixture at room temperature in the amounts shown in Table 3. 15 minutes later, glyoxal was injected into the gas oil mixture in the amounts shown in Table 3. The Auto-Clave was sealed and the gas oil and water mixture was heat...

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Abstract

A method for reducing the amount of hydrogen sulfide present in refined hydrocarbon streams and reducing the amount of corrosion in processing equipment contacting the refined hydrocarbon stream. The method includes adding a corrosion inhibitor to the refined hydrocarbon stream in contact with the processing equipment to protect the processing equipment and adding glyoxal to the refined hydrocarbon stream in contact with the protected processing equipment. The corrosion inhibitor includes an organic soluble compound having a nitrogen-containing ring.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to processing hydrocarbon media, and more particularly, to methods for removing hydrogen sulfide from a refined hydrocarbon stream.BACKGROUND OF THE INVENTION[0002]Hydrocarbon media, such as a refined hydrocarbon stream, may contain hydrogen sulfide, which is highly corrosive and poisonous in very small concentrations. The risk of exposure to hydrogen sulfide from handling hydrocarbon media is a health and safety concern during storage, transportation (shipping, truck or pipeline) and processing.[0003]Hydrogen sulfide scavengers can be used to remove hydrogen sulfide from hydrocarbon media. One type of hydrogen sulfide scavenger is glyoxal. During production of glyoxal, acidic byproducts are often formed. These byproducts can lead to increased corrosion rates during hydrocarbon processing. When glyoxal is added to a refined hydrocarbon stream, the acidic byproducts, which are not soluble in the refined hydrocarbon stream, ...

Claims

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Application Information

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IPC IPC(8): C10G75/04
CPCC10G29/22C10G75/02C10G2300/104C10G2300/1044C10G2300/1051C10G2300/80C10G2300/1059C10G2300/1077C10G2300/207C10G2300/4075C10G2300/1055C10G29/20C10G75/04
Inventor KARAS, LARRY JOHNELDIN, SHERIFWINSLOW, MALCOLM CRAIG
Owner GENERAL ELECTRIC CO
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