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Hydrogen sulfide scavengers and methods for removing hydrogen sulfide from asphalt

A hydrogen sulfide scavenger and scavenger technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, refined hydrocarbon oil, etc., can solve the problems of incompatibility of upgraded catalyst bed, expensive organic substance-based scavenger, splashing, etc.

Inactive Publication Date: 2011-02-23
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these water-based triazines can cause foam, splashes and possible spills
Commercially available organic based scavengers are expensive and may contain metal ions
Introduction of other metal ions may create incompatibility with upgraded catalyst beds

Method used

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  • Hydrogen sulfide scavengers and methods for removing hydrogen sulfide from asphalt
  • Hydrogen sulfide scavengers and methods for removing hydrogen sulfide from asphalt
  • Hydrogen sulfide scavengers and methods for removing hydrogen sulfide from asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Sample 1 was prepared by dispersing 51 mg of diethylenetriamine into 34 mg of propylene glycol. Sample 2 was prepared by dispersing 51 mg of diethylenetriamine and 3 mg of alkylbenzyl ammonium chloride (ARQUADDMCB-80 from Akzo-Nobel) into 34 mg of propylene glycol. Sample 1 was added to 578 g of bitumen (from Conoco Phillips, West Lake, LA refinery) containing more than 350 ppm hydrogen sulfide. Sample 2 was added to 821 g of the bitumen. Determination of the concentration of hydrogen sulfide in the vapor phase at frequent intervals, e.g. figure 1 shown in . The scatter in the data can be attributed to the determination of H 2 + / -15% error in S vapor concentration.

[0061] figure 1 It shows that samples 1 and 2 reduce and control the content of hydrogen sulfide in bitumen. The addition of a catalyst (alkyl benzyl ammonium chloride) significantly increases the effectiveness of the scavenger composition. Sample 2 effectively controls hydrogen sulfide levels in bit...

Embodiment 2

[0063] Control sample A was prepared by dispersing 51 mg of 1,3,5-trimethylhexahydro-1,3,5-triazine into 34 mg of propylene glycol. Control sample B was prepared by dispersing 51 mg MA-triazine and 3 mg alkylbenzyl ammonium chloride (ARQUAD DMCB-80 from Akzo-Nobel) into 34 mg propylene glycol. Control Sample A was added to 578 g of bitumen (from Conoco Phillips, West Lake, LA refinery) containing more than 350 ppm hydrogen sulfide. Control Sample B was added to 821 g of the bitumen. Determination of the concentration of hydrogen sulfide in the vapor phase at frequent intervals, e.g. figure 2 shown. The scatter in the data can be attributed to the determination of H 2 + / -15% error in S vapor concentration.

[0064] figure 2 It was shown that the catalyst (ARQUAD DMCB-80) had no effect on the hydrogen sulfide scavenging efficiency when the organic substance based MA-triazine was used. figure 2 The data in also show that the overall clearance of the control sample is not...

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Abstract

A method for reducing hydrogen sulfide in asphalt includes adding a hydrogen scavenger composition to the asphalt. The hydrogen sulfide scavenger includes a polyaliphatic amine having the formula I: (I); R is an aliphatic radical and n is from about 0 to about 15. A method for treating asphalt and a hydrogen sulfide scavenger are also provided.

Description

field of invention [0001] This invention relates generally to hydrogen sulfide scavengers, and more particularly to hydrogen sulfide scavengers for asphalt. Background of the invention [0002] In refined crude oil, a bituminous product or heavy oil is produced as a residue in the distillation of crude oil. The bitumen product is a black, viscous substance that can be upgraded to higher-value gasoline or diesel through further refining. However, asphalt products often contain hydrogen sulfide, and upgrading asphalt products increases the risk of hydrogen sulfide exposure. Since hydrogen sulfide is corrosive in the presence of water and toxic in very small concentrations, it must be removed prior to upgrading bitumen products. [0003] Bitumen has a high temperature range and current commercial technologies utilize water-based triazines as hydrogen sulfide scavengers. However, these water-based triazines can cause foam, splashes and possible spills. Commercially available...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/17
CPCC08K5/17C08L95/00C10G29/20C10G2300/207
Inventor S·埃尔丁L·J·卡拉斯
Owner GENERAL ELECTRIC CO