Unlock instant, AI-driven research and patent intelligence for your innovation.

Regeneration method of fine desulfuration agent of liquefied petroleum gas

A technology of liquefied petroleum gas and fine desulfurizer, which is applied in chemical instruments and methods, petroleum industry, separation methods, etc., can solve the problems of low production efficiency, time-consuming, and inability to regenerate adsorbed desulfurizers, saving time and improving regeneration. The effect of efficiency

Inactive Publication Date: 2015-05-27
DONGYING K&T CHEM TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first technical problem to be solved by the present invention is that the adsorption desulfurization agent in the prior art cannot be regenerated. For this type of adsorption agent, when desulfurizing liquefied petroleum gas, it needs to consume a large amount of adsorption desulfurization agent. If the above-mentioned If the adsorption desulfurizer is effectively regenerated, then the amount of the adsorption desulfurizer will be huge
[0004] The second technical problem to be solved by the present invention is: the desulfurizer needs to be taken out from the adsorption-desorption tower during desorption regeneration, and then put into the adsorption-desorption tower after regeneration, which is time-consuming and has low production efficiency. A regeneration method that is suitable for large-scale industrial production and can directly desorb the saturated adsorption desulfurizer without taking it out of the adsorption-desorption tower

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] Set 100L of copper molecular sieve saturated adsorption desulfurizer on a fixed bed, use 1.0MPa superheated steam at a temperature of 180°C, and a volumetric space velocity of 15h -1 Under certain conditions, the saturated adsorption desulfurization agent is desorbed and regenerated through a fixed bed of saturated adsorption desulfurization agent; then, in a nitrogen atmosphere, the above-mentioned desorbed adsorption desulfurization agent bed is dried at 200°C for 6 hours, and then The condensed water remaining in the adsorption desulfurization agent is removed to obtain the adsorption desulfurization agent after desorption regeneration.

Embodiment 2

[0019] Set 100L of saturated adsorption desulfurizer composed of 5wt% CuO and 95wt% molecular sieve on a fixed bed, using 1.0MPa superheated steam at a temperature of 180°C and a volumetric space velocity of 20h -1 Under certain conditions, the saturated adsorption desulfurization agent is desorbed and regenerated through the saturated adsorption desulfurization agent fixed bed; after that, in the air atmosphere, the above-mentioned desorbed adsorption desulfurization agent bed is dried at 200 ° C for 6 hours, and the The condensed water remaining in the adsorption desulfurization agent is removed to obtain the adsorption desulfurization agent after desorption regeneration.

Embodiment 3

[0021] Set 100L of saturated adsorption desulfurizer composed of 6wt% CuO and 94wt% molecular sieve on a fixed bed, using 1.0MPa superheated steam at a temperature of 180°C and a volumetric space velocity of 20h -1 Under certain conditions, the saturated adsorption desulfurization agent is desorbed and regenerated through the saturated adsorption desulfurization agent fixed bed; after that, in the air atmosphere, the above-mentioned adsorption denitrification agent bed after desorption is dried at 300 ° C for 5 hours, and then The condensed water remaining in the adsorption desulfurization agent is removed to obtain the adsorption desulfurization agent after desorption regeneration.

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 provides a regeneration method of fine desulfuration agent of liquefied petroleum gas. In the method, a saturated adsorption desulfurization agent after adsorbing sulfur is desorbed and regenerated with superheated steam being 1.0 MPa in pressure. Bed layers of an adsorbent and a desulfurization agent are dried by a gas at 200-300 DEG C. By means of the desorption-regeneration method, fully desorption of the sulfides adsorbed in the saturated adsorption desulfurization agent is achieved by selecting the superheated steam. In addition, the saturated adsorption desulfurization agent can be directly subjected to the desorption-regeneration treatment in an adsorption / desorption column in an adsorption desulfurization system of the liquefied petroleum gas without removal of the adsorption desulfurization agent from the adsorption / desorption column, thereby saving much time and increasing the regeneration efficiency.

Description

Technical field: [0001] The invention relates to the field of refinery liquefied petroleum gas technology, in particular to a method for regenerating a liquefied petroleum gas fine desulfurizer. Background technique: [0002] Refinery liquefied petroleum gas (LPG) after etherification C 4 The existing forms of sulfide in the medium include organic sulfides such as mercaptan, sulfide and dimethyl disulfide, and dimethyl disulfide is the main one. The existence of sulfide will not only poison the catalyst, but also seriously hinder the downstream production. It will not only corrode storage and transportation equipment, but also affect the purity of downstream products. The main component of etherified liquefied petroleum gas is C with high value. 4 Hydrocarbons can be used to produce chemical raw materials such as propylene, isobutene and butadiene with higher added value. Catalysts in the process of producing these chemical raw materials are sensitive to sulfides, which c...

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): B01J20/34B01J20/18C10L3/12
Inventor 扈献勇吴全贵万鹏辉周广林
Owner DONGYING K&T CHEM TECH