Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for removing hydrogen sulfide and mercaptan

A technology for removing gas and hydrogen sulfide, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, etc., can solve problems such as complex processes, and achieve high removal efficiency and large operating flexibility

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the exploitation of sulfur-containing oilfield gas and high-sulfur natural gas, the gas contains hydrogen sulfide and mercaptans, and the refinery gas contains hydrogen sulfide and mercaptans. Usually, the amine method is used to remove hydrogen sulfide, and the gas from which hydrogen sulfide is removed is recycled. Absorption of mercaptans with alkali, there is a complicated process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Test method

[0018] The hydrogen sulfide and mercaptan in the gas are removed by using the complex iron solution containing the quaternary ammonium base of the present invention, the gas enters the absorption tower from bottom to top, and the desulfurization liquid passes through the distributor and flows countercurrently with the sulfur-containing gas from top to bottom Contact, the gas after desulfurization is analyzed by the analyzer to analyze the content of hydrogen sulfide and mercaptan in the gas, and the solution that has absorbed the sulfide enters the oxidation regeneration tower, and oxidizes and regenerates to recover sulfur. The test gas is natural gas with a certain amount of hydrogen sulfide and mercaptan added.

[0019] (2) Test conditions

[0020] The concentration of hydrogen sulfide prepared by natural gas is 10.2 g / ·Nm 3 , Methylmercaptan 205m g / ·Nm 3 , ethanethiol 65m g / ·Nm 3 the test gas.

[0021] Test gas flow rate: 1 Nm 3 / Hour

...

Embodiment 2

[0032] (1) The test method is the same as in Example 1

[0033] (2) Test conditions

[0034] Use natural gas to prepare hydrogen sulfide with a concentration of 10.7 g / ·Nm 3 , Methylmercaptan 255m g / ·Nm 3 , ethanethiol 165m g / ·Nm 3 the test gas.

[0035] Test gas flow rate: 1 Nm 3 / Hour

[0036] Gas pressure: 1Mpa

[0037] Liquid flow: 22 liters / hour

[0038] Absorption and regeneration temperature: 30~40 o C

[0039] Tetraethylammonium hydroxide content: 5g / l

[0040] Tetrapropylammonium hydroxide content 5g / l

[0041] Iron concentration of complex iron solution 2.5 g / L

[0042] Solution pH 8.2

[0043] (3) Desulfurization effect

[0044] Under the above test conditions, the average content of hydrogen sulfide in the purified gas during the absorption process of continuous ventilation for 72 hours is 4mg· / Nm 3 , methyl mercaptan 6m g / ·Nm 3 , methyl mercaptan 6m g / ·Nm 3 .

Embodiment 3

[0046] (1) The test method is the same as in Example 1

[0047] (2) Test conditions

[0048] The concentration of hydrogen sulfide prepared by natural gas is 12.8 g / ·Nm 3 , Methylmercaptan 675m g / ·Nm 3 , ethanethiol 465m g / ·Nm 3 the test gas.

[0049] Test gas flow rate: 1 Nm 3 / Hour

[0050] Gas pressure: 1Mpa

[0051] Liquid flow: 22 liters / hour

[0052] Absorption and regeneration temperature: 30~40 o C

[0053] Tetrapropylammonium hydroxide content: 5g / l

[0054] Tetrabutylammonium hydroxide content: 10g / l

[0055] Iron concentration of complex iron solution 2.5 g / L

[0056] Solution pH 8.2

[0057] (3) Desulfurization effect

[0058] Under the above test conditions, the average content of hydrogen sulfide in the purified gas during the absorption process of continuous ventilation for 72 hours is 7mg· / Nm 3 , methyl mercaptan 14m g / ·Nm 3 , Methylmercaptan 11m g / ·Nm 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention belongs to the technical field of gas purification, and discloses a treatment method for gas containing hydrogen sulfide and mercaptan. According to the method, an improved chelated iron absorption solution is adopted to convert hydrogen sulfide in gas into hydrosulfide radical ions during an absorption process; the rich solution absorbing the hydrogen sulfide is subjected to air oxidation regeneration so as to convert the hydrosulfide radical ions into elemental sulfur harmless for the environment, the absorbed mercaptan is converted into mercaptide under a catalysis effect of a quaternary ammonium base, and the treated gas achieves pipeline transportation requirements; and the absorption solution comprises a chelating agent, a stabilizer, a sulfur modifier and a quaternary ammonium base, and provides high removal efficiency for hydrogen sulfide and mercaptan, wherein the total sulfur removal rate is more than 99.9%.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and relates to a method for removing hydrogen sulfide and mercaptan from gas. Specifically, the invention is a redox desulfurization method by adding a quaternary ammonium base. Background technique [0002] As we all know, industrial feed gas containing hydrogen sulfide will cause corrosion of pipelines and equipment, catalyst poisoning, and affect product quality; exhaust gas emissions containing hydrogen sulfide and mercaptans will cause serious environmental problems. [0003] The methods for removing hydrogen sulfide mainly include: (1) dry desulfurization, such as iron oxide method, zinc oxide method and activated carbon method. (2) Alcohol amine method. (3) Wet oxidation methods, such as ADA method, tannin extract method, MSQ method, PDS method and complex iron method, etc. (4) Physical solvent methods such as low-temperature methanol method, NHD method, etc. [0004] The main ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52B01D53/48
Inventor 杨建平俞健健
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com