LPG normal-temperature dry desulfurization purification process

A dry desulfurization and purification process technology, which is applied in the petroleum industry, gas mixture processing, and hydrocarbon oil treatment. It can solve the problems of unsuitability for small and medium-sized refineries, complex processes, increased production and investment costs, and achieve investment and operation. Low cost, simple process flow, and the effect of reducing equipment investment costs

Active Publication Date: 2020-07-24
WUHAN KELIN FINE CHEM
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Application No. 201410782329.8 discloses a combination process for deep desulfurization of LPG, which uses a COS washing tower to remove H in LPG. 2 S and COS, convert the small molecular mercaptans in LPG into high-boiling disulfides through an oxidation tower, and then reduce the sulfur content of LPG to below 5 μg / g by rectification, because this invention requires rectification The method of removing sulfide will inevitably increase production and investment costs, resulting in complex processes, which are not suitable for use in small and medium refineries

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
  • LPG normal-temperature dry desulfurization purification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A refinery LPG contains about 50mg / m 3 H 2 S, 10mg / Nm 3 RSH, 1-2mg / Nm 3 HCOOH, 1-2mg / Nm 3 CH 3 OH, the raw material LPG1 enters the water washing tower 4 from bottom to top after being metered and pressurized by the feed pump 2, and the countercurrent in the water washing tower 4 contacts with the washing water 3 added with 50ppm of hydroxyethyl hexahydro-s-triazine to remove it. Contains HCOOH, CH 3OH, HCHO, DME and other aldols and ethers enter the reactor A from bottom to top. The bottom of reactor A is equipped with a shower 5 to regularly discharge the water brought by the washing device. In terms of volume ratio, the lower 2 / 3 bed of reactor A is equipped with Fe-Ca-based desulfurizer 6, and the upper 1 / 3 bed is equipped with Ni-Ca-based desulfurizer 7. Fe, Ni, and Ca in the desulfurizer are respectively With γ-FeOOH, NiCO 3 2Ni(OH) 2 4H 2 O, Nano-CaCO 3 form exists. H in LPG after purified by A reactor 2 S, Cl, F are all less than 1mg / Nm 3 , the LPG...

Embodiment 2

[0033] A refinery LPG contains about 50mg / m 3 H 2 S, 10mg / Nm 3 RSH, 1-2mg / Nm 3 HCOOH, 1-2mg / Nm 3 CH 3 OH, the raw material LPG1 enters the water washing tower 4 from bottom to top after being metered and pressurized by the feed pump 2, and the countercurrent in the water washing tower 4 contacts with the washing water 3 added with 300ppm of hydroxyethyl hexahydro-s-triazine to remove it. Contains HCOOH, CH 3 OH, HCHO, DME and other aldols and ethers enter the reactor A from bottom to top. The bottom of reactor A is equipped with a shower 5 to regularly discharge the water brought by the washing device. In terms of volume ratio, the lower 2 / 3 bed of reactor A is equipped with Fe-Ca-based desulfurizer 6, and the upper 1 / 3 bed is equipped with Ni-Ca-based desulfurizer 7. Fe, Ni, and Ca in the desulfurizer are respectively With γ-FeOOH, NiCO 3 2Ni(OH) 2 4H 2 O, Nano-CaCO 3 form exists. H in LPG after purified by A reactor 2 S, Cl, F are all less than 1mg / Nm 3 , the LP...

Embodiment 3

[0035] A refinery LPG contains about 50mg / m 3 H 2 S, 10mg / Nm 3 RSH, 1-2mg / Nm 3 HCOOH, 1-2mg / Nm 3 CH 3 OH, the raw material LPG1 enters the water washing tower 4 from bottom to top after being metered and pressurized by the feed pump 2, and the countercurrent in the water washing tower 4 contacts with the washing water 3 added with 500ppm of hydroxyethyl hexahydro-s-triazine, and removes it. Contains HCOOH, CH 3 OH, HCHO, DME and other aldols and ethers enter the reactor A from bottom to top. The bottom of reactor A is equipped with a shower 5 to regularly discharge the water brought by the washing device. In terms of volume ratio, the lower 2 / 3 bed of reactor A is equipped with Fe-Ca-based desulfurizer 6, and the upper 1 / 3 bed is equipped with Ni-Ca-based desulfurizer 7. Fe, Ni, and Ca in the desulfurizer are respectively With γ-FeOOH, NiCO 3 2Ni(OH) 2 4H 2 O, Nano-CaCO 3 form exists. H in LPG after purified by A reactor 2 S, Cl, F are all less than 1mg / Nm 3 , the...

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 an LPG normal-temperature dry desulfurization purification process. After LPG is washed with water, the LPG sequentially passes through three desulfurization purification reactors, Cl, F, H2S, RHS, elemental S and other sulfides in the LPG are removed respectively, and the problem that copper sheet corrosion is unqualified can be thoroughly solved. The process is operated at normal temperature, the whole process is free of heating and cooling processes, consumption of steam and cooling water is avoided, the process is low in investment cost, hydrogen production and rectification equipment is not needed, and the process can be made into a skid-mounted device and is particularly suitable for being applied to medium and small refinery plants.

Description

technical field [0001] The invention relates to an LPG normal temperature dry desulfurization purification process, which belongs to the field of petrochemical industry. Background technique [0002] Due to the high content of impurities such as sulfur and chlorine in LPG, its copper sheet corrosion is unqualified, which affects its use in the next step. Studies have shown that alcohols, aldehydes, ethers, Cl, F, H 2 The high content of S, RHS and elemental S is the main reason for the unqualified copper corrosion. Therefore, desulfurization and purification are the prerequisites for the utilization of LPG. Currently, LPG desulfurization technologies include dry desulfurization and wet desulfurization. Most wet desulfurization uses fiber membrane desulfurization. This process first removes the hydrogen sulfide in it with alkali washing or amine solution, and then enters the fiber membrane process to convert the mercaptan into sodium mercaptide, enters the lye through extrac...

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): C10G70/00
CPCC10G70/00
Inventor 王泽张先茂王天元王国兴王瑜郑敏赵志杰陈凯金建涛
Owner WUHAN KELIN FINE CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap