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

Fine desulfurization method for liquid hydrocarbon

A technology of liquid hydrocarbon and hydrocarbon essence, which is applied in the treatment of hydrocarbon oil, multi-stage series refining process treatment, petroleum industry, etc., can solve the problem that the product quality requirements of liquid hydrocarbon sulfur content cannot be met, and the liquid hydrocarbon form sulfur cannot be effectively removed. And other issues

Active Publication Date: 2016-08-24
NINGBO ZHANGFU ENERGY TECH CO LTD
View PDF25 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] To sum up, the above-mentioned patents are all aimed at a certain type of liquid hydrocarbons, or adopt corresponding desulfurization technologies for one or two forms of sulfur in liquid hydrocarbons, which cannot effectively remove all forms of sulfur in liquid hydrocarbons. Meet the current development needs of increasing sulfur content in liquid hydrocarbons and increasingly stringent product quality requirements

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fine desulfurization method for liquid hydrocarbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: The temperature of catalytic liquefied gas in a refinery is 30-40°C, the pressure is 2.4-2.5MPa, and the hydrogen sulfide content is 15000-30000mg / Nm 3 , mercaptan content 300-500mg / Nm 3 , carbonyl sulfide content 10-15mg / Nm 3 , disulfide content 5-10mg / Nm 3 , the total content of sulfur in other forms is 5-10mg / Nm 3 , requiring the total sulfur content of refined liquefied gas to be no more than 1mg / Nm 3 , the sodium ion content is less than 0.1ppm.

[0060] Use two-stage fiber liquid membrane contactor to elute hydrogen sulfide with amine, and the content of hydrogen sulfide in the liquefied gas after removal is less than 10mg / Nm 3 ; The carbonyl sulfide hydrolysis and hydrogen sulfide absorption unit B1 and carbonyl sulfide removal agent regeneration unit B2 of the first-stage fiber liquid membrane contactor are used. The regeneration flow rate of carbonyl sulfide rich removal agent is 15% of the circulation flow rate. The hydrogen sulfide content is ...

Embodiment 2

[0061] Example 2: The temperature of coking liquefied gas in a refinery is 30-45°C, the pressure is 1.4-1.6MPa, and the hydrogen sulfide content is 35000-60000mg / Nm 3 , mercaptan content 3000-6000mg / Nm 3 , carbonyl sulfide content 20-30mg / Nm 3 , disulfide content 50-80mg / Nm 3 , the total content of sulfur in other forms is 20-50mg / Nm 3 , it is required that the total sulfur content of refined liquefied gas shall not exceed 100mg / Nm 3 , Copper corrosion detection level 1, sodium ion content is less than 1ppm.

[0062] Use two-stage fiber liquid membrane contactor to elute hydrogen sulfide with amine, and the content of hydrogen sulfide in the liquefied gas after removal is less than 20mg / Nm 3 ; The carbonyl sulfide hydrolysis and hydrogen sulfide absorption unit B1 and the carbonyl sulfide removal agent regeneration unit B2 of the primary fiber liquid membrane contactor are used. The regeneration flow rate of the rich carbonyl sulfide removal agent is 20% of the circulation...

Embodiment 3

[0063] Example 3: After gas separation in a refinery, the carbon dioxide temperature is 50-60°C, the pressure is 0.5-0.6MPa, and the hydrogen sulfide content is less than 1mg / Nm 3 , mercaptan content 50-80mg / Nm 3 , carbonyl sulfide content is less than 1mg / Nm 3 , disulfide content 150-200mg / Nm 3 , the total content of sulfur in other forms is 30-50mg / Nm 3 , it is required that the total sulfur content of refined C4 should not exceed 5mg / Nm 3 , Copper corrosion detection level 1, sodium ion content is less than 1ppm.

[0064] Alkaline elution mercaptan unit C1, lye oxidation unit C2, lye back extraction unit C3 and solvent washing unit C4 using a primary fiber liquid membrane contactor. The temperature of the alkali solution in the tower is 40-50°C, the operating pressure of the oxidation tower is 0.2-0.3MPa, the total sulfur of gasoline fed into the device is less than 10ppm, the concentration of sodium mercaptide and disulfide in the regenerated alkali solution is less th...

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 invention discloses a fine desulfurization method for liquid hydrocarbon. The method includes steps: a) removing hydrogen sulfide; b) removing carbonyl sulfide; c) removing mercaptan; d) water washing for alkali removal; e) removing disulfides; f) removing residual sulfurs. The method has advantages that 1) aiming at liquid hydrocarbons including liquefied gas, carbon 3, carbon 4, carbon 5 and the like containing different forms of sulfurs, MDEA (methyldiethanolamine) liquid and a fiber film contactor are adopted for extraction to realize hydrogen sulfide removal, and the hydrogen sulfide removal rate is larger than 99.9%; 2) the fiber film contactor and a carbonyl sulfide removing agent which is capable of hydrolyzing carbonyl sulfide and absorbing hydrogen sulfide generated in hydrolysis are adopted for extraction to realize carbonyl sulfide removal, and the carbonyl sulfide removal rate is larger than 99%; 3) by adoption of the complete desulfurization process, total sulfurs in liquid hydrocarbons can be reduced below 1ppm.

Description

Technical field [0001] This method involves a chemical technology developed for liquefied gas, carbon three, carbon four, and carbon five -liquid hydrocarbons containing different shapes of sulfur. It is specifically a method of liquid hydrocarbon desulfurization. Background technique [0002] With the inferior and high vulcanization of crude oil, the content of liquefied gas and its fractional products such as carbon three, carbon four, and carbon fifth -other liquid hydrocarbons in the production of crude oil produced by refining enterprises are getting higher and higher, and the sulfur form is getting more and more complicated, and the form of sulfur is becoming more and more complicated.With the improvement of living standards, people's requirements for petrochemical products and living environment are getting higher and higher, and oil refining companies are constantly improving production processes and product desulfurization technology to meet the above production and livi...

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
IPC IPC(8): C10G53/14
CPCC10G53/14C10G2300/202
Inventor 徐振华
Owner NINGBO ZHANGFU ENERGY TECH CO LTD
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