Deep desulfurization method of refinery C4

A technology for carbon 4 and deep desulfurization in refineries, applied in chemical instruments and methods, purification/separation of hydrocarbons and hydrocarbons, etc., can solve the problems of increased desulfurization cost, high catalyst cost, unsatisfactory desulfurization effect, etc. Simple and effective process, avoid secondary pollutants, excellent desulfurization effect

Inactive Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned oxidative extraction and mercaptan removal technology can significantly increase the solubility of mercaptans in alkaline solution and improve the removal rate of mercaptans, this method still has the following disadvantages: (1) Cobalt phthalocyanine catalysts are in the alkali phase and are prone to aggregation and loss. active, resulting in frequent replacement of the catalyst, and the cost of the catalyst is quite high; (2) C4 in the refinery uses lye containing catalyst for mercaptan extraction. Under the condition of catalyst, sodium mercaptide is easy to generate disulfide and bring it into the refined Among the C4 products in the refinery, the desulfurization rate is low, and the total sulfur content of C4 in the refinery exceeds the standard; (3) Due to the use of caustic soda, the pressure on environmental protection has been aggravated. , use ammonia water instead of liquid caustic soda to carry out carbon four pre-alkali washing in refineries, and use gas stripping device to treat ammonia water to regenerate and recycle ammonia, but in this way, gas equipment must be added, and ammonia water is weak in alkalinity and organic sulfur is difficult to elute
It is also possible to wash with solid alkali instead of liquid alkali, and then mix it with active agent into the deodorization tower for deodorization, but it needs to add a special d

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
  • Deep desulfurization method of refinery C4
  • Deep desulfurization method of refinery C4
  • Deep desulfurization method of refinery C4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take alumina (specific surface area 330 m 2 / g, pore volume 0.75 cm 3 / g) 85.0g, add 73.0g distilled water and 10.5ml concentrated nitric acid, mix well, and make a binder. Take 145.5g of HZSM-5 (the ratio of silicon to aluminum is 50), knead 4.0g of Tianqing powder and the above binder, extrude into strips, dry the wet strips at 120°C for 4 hours, and bake them at 550°C for 5 hours to produce Adsorbent. Dissolve 47.5g of ammonium metatungstate and 51.2g of nickel nitrate in distilled water to make a 200ml solution, add the above adsorbent into the impregnation solution, soak for 2 hours, then filter, dry at 110°C for 4 hours, and roast at 550°C 3 hours, then carry out secondary impregnation, take 32.2g zirconium nitrate pentahydrate, 23.3g zinc nitrate hexahydrate, dissolve with distilled water, make 200ml solution, add the above-mentioned adsorbent in the impregnation solution, impregnate for 2 hours, then filter, in Drying at 110°C for 4 hours, and calcining at 55...

Embodiment 2

[0023] Take alumina (specific surface area 310 m 2 / g, pore volume 0.96 cm 3 / g) 85.0g, add 73.0g distilled water and 10.5ml concentrated nitric acid, mix well, and make a binder. Take 145.5g of HZSM-5 (the ratio of silicon to aluminum is 25), knead 3.0g of Tianqing powder and the above binder, extrude into strips, dry the wet strips at 120°C for 4 hours, and bake them at 550°C for 5 hours to produce carrier. Dissolve 31.6g of ammonium metatungstate and 25.6g of nickel nitrate in distilled water to make a 200ml solution, add the above carrier into the impregnation solution, impregnate for 2 hours, then filter, dry at 110°C for 4 hours, and roast at 550°C for 3 hours. hours, then carry out secondary impregnation, take 27.6g of zinc nitrate hexahydrate and 14.4g of cerium nitrate hexahydrate and dissolve them in distilled water to make a 200ml solution, add the above carrier into the impregnation solution, impregnate for 2 hours, then filter, Dry for 4 hours, and bake at 550°...

Embodiment 3

[0026] Take alumina (specific surface area 330 m 2 / g, pore volume 0.75 cm 3 / g) 85.0g, add 73.0g distilled water and 10.5ml concentrated nitric acid, mix well, and make a binder. Take 145.5g of HZSM-5 (the ratio of silicon to aluminum is 80), knead 3.0g of Tianqing powder and the above binder, extrude into strips, dry the wet strips at 120°C for 4 hours, and bake them at 550°C for 5 hours to produce carrier. Dissolve 62.4g of ammonium molybdate and 34.1g of nickel nitrate in distilled water to make a 200ml solution, add the above carrier into the impregnation solution, impregnate for 2 hours, then filter, dry at 110°C for 4 hours, and roast at 550°C for 3 hours , and then carry out secondary impregnation, take 15.6g of copper nitrate trihydrate and 20.5g of cerium nitrate hexahydrate dissolved in distilled water to make a 200ml solution, add the above carrier into the impregnation solution, impregnate for 2 hours, then filter and dry at 110°C 4 hours, then calcined at 550°...

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

PropertyMeasurementUnit
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a deep desulfurization method of refinery C4, which comprises the following steps that at least two fixed bed reactors are adopted; a C4 fraction is subjected to adsorption desulfurization by the action of an adsorbent loaded with a hydrogenated active component; the C4 fraction is switched to another reactor for the adsorption desulfurization after adsorption saturation; hydrogen is supplied to the adsorption saturated fixed bed reactor for a hydrogenated desulfurization reaction; and the adsorbent loaded with the hydrogenated active component is regenerated. Refinery C4 desulfurized by the method can directly serve as a raw production material of MTBE (methyl tert-butyl ether), and isobutylene in the C4 fraction is sufficiently protected and utilized.

Description

technical field [0001] The invention belongs to the desulfurization technology of C4 in a refinery, and in particular relates to a deep desulfurization method of C4 in a refinery. Background technique [0002] The main use of C4 in my country's refineries is to use isobutene to produce methyl tert-butyl ether (MTBE) as a gasoline blending component, and C4 after ether is further used as civil fuel or chemical raw material. [0003] In the process of petroleum refining, refinery C4 produced by coking, atmospheric and vacuum, catalytic cracking and other devices contains a large amount of sulfide, except for H 2 In addition to S, there are various forms of organic sulfur, such as COS, CH 3 SH, C 2 h 5 SH, CH 3 SCH 3 etc., mainly CH 3 sh. The presence of these sulfur will cause poisoning and deactivation of the catalyst in the subsequent processing, which will have a very adverse effect on downstream product processing, environmental protection and equipment corrosion pr...

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): C07C7/163C07C7/13C07C11/09
Inventor 王海波乔凯薛冬勾连科宋丽芝侯学伟
Owner CHINA PETROLEUM & CHEM CORP
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