Absorbent for chloride removal

An adsorbent, chloride technology, applied in other chemical processes, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as difficult removal, low adsorption capacity of organic chlorides, leakage, etc.

Inactive Publication Date: 2014-12-17
PTT PUBLIC CO LTD
View PDF8 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have a disadvantage: they promote the formation of organic complex molecules through olefin oligomerization, Friedelkraft alkylation and Scholl aromatic coupling, and thus, promote the formation of those organic Leakage of complexes to downstream processes
However, due to the deliquescence of zinc chloride, calcium chloride, etc. formed by reacting with chlorides in the fluid passing through the bed of the zinc oxide-based adsorbent, the zinc oxide-based adsorbent is easily broken and becomes powdery, which Presents an unacceptable resistance to fluid flow therethrough and thus causes a high pressure drop as the fluid passes through the adsorbent bed
To overcome this problem, recent developments involving improvements in the zinc oxide content and composition of adsorbents have been disclosed; however, these improved zinc oxide-based adsorbents also suffer from greater hydrophobicity, resulting The low adsorption capacity of compounds
[0005] Organic chlorides are very less corrosive than inorganic chlorides, but more difficult to remove

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
  • Absorbent for chloride removal
  • Absorbent for chloride removal
  • Absorbent for chloride removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Sorbent preparation : 80 ml of an aqueous solution comprising 40% by weight of sodium aluminate and 7% by weight of calcium oxide is contacted with 60 g of activated carbon powder to obtain a wet impregnated product. The activated carbon powder is derived from corncobs and has a BET surface area of ​​763.2 m2 / g and a surface area of ​​35 cm 3 / 100g micropore capacity. The wet impregnated product was dried in an oven at 120°C for 2 hours and then calcined at 280°C for 4 hours in an air atmosphere. Based on the total weight of the adsorbent, the calcined product had an activated carbon content of 2.8%, an alumina content of 63.58%, a calcium oxide content of 8.57%, a sodium oxide content of 20.89%, and the remaining other contents.

[0036] Test for Chloride Removal : 1 kg of the adsorbent prepared in this way is packed into an adsorption container with a length-to-diameter ratio of 20. Hydrogen by-product gas from the catalytic reformer of the aromatics plant was fe...

Embodiment 2

[0040] Sorbent preparation : Dry mix 43.4g of activated carbon powder, 46.2g of sodium aluminate powder, 8.0g of calcium oxide powder and 2.2g of aluminum powder for 10 minutes, during which water is gradually added to the above at a ratio of water to powder of 0.25 ingredients. The activated carbon powder is derived from corncobs and has a BET surface area of ​​763.2 m2 / g and a surface area of ​​35 cm 3 / 100g micropore capacity. The mixture thus obtained was extruded to form cylindrical pellets of 3.5 mm before being dried in an oven at 120° C. for 2 hours and calcined in an air atmosphere at 300° C. for 3 hours. Based on the total weight of the adsorbent, the calcined product had an activated carbon content of 6.8%, an alumina content of 30.76%, a calcium oxide content of 22.65%, a sodium oxide content of 30.76%, and other remaining contents.

[0041] Test for Chloride Removal : Test in the same manner as in Example 1. The test results are shown in Table 1.

Embodiment 3

[0043] Sorbent preparation : Dry mix 79.4g of activated carbon powder, 12.6g of sodium aluminate powder, 5.8g of calcium oxide powder and 2.2g of aluminum powder for 10 minutes, during which water is gradually added to the above at a ratio of water to powder of 0.25 ingredients. The activated carbon powder is derived from corncobs and has a BET surface area of ​​763.2 m2 / g and a surface area of ​​35 cm 3 / 100g micropore capacity. The homogeneous mixture thus obtained was extruded to form cylindrical pellets of 3.5 mm before being dried in an oven at 120° C. for 2 hours and calcined at 300° C. in an air atmosphere for 3 hours. Based on the total weight of the adsorbent, the calcined product had an activated carbon content of 18.47%, an alumina content of 69.27%, a calcium oxide content of 4.02%, a sodium oxide content of 4.23%, and other residual contents.

[0044] Test for Chloride Removal : Test in the same manner as in Example 1. The test results are shown in Table 1. ...

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 an absorbent removing organic and inorganic chloride from hydrogen flows produced by catalytic reforming of heavy naphtha. The absorbent comprises 1% to 50% weight of activated carbon component, 40% to 90% weight of aluminum oxide component and 5% to 55% weight of metallic oxide component as well as 0.5% to 3% weight of binder. The invention further provides a method of manufacturing and using the absorbent.

Description

technical field [0001] The present invention relates generally to the adsorption of chlorides, and more particularly to methods for the efficient removal of chloride contaminants (both organic and inorganic ) of the adsorbent. technical background [0002] The catalytic reforming method is widely used in the processing of heavy naphtha in the petroleum industry to produce aromatic feedstock as the main product and liquefied petroleum gas and hydrogen as by-products. Hydrogen produced by catalytic reforming units is typically used for desulfurization and upgrading of other hydrocarbon fractions in downstream production units. During catalytic reforming, organic chlorides are typically injected into the catalytic reforming reactor to activate and maintain the performance of the reforming catalyst. Thus, chlorides are produced by the decomposition of organic chlorides in the reforming reaction and are discharged from the catalytic reformer along with the hydrogen flow. It is...

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): B01J20/20B01J20/30B01D53/04
Inventor S·普莱达皮塔昆T·萧R·琪雅帝科莫S·普姆锡兰
Owner PTT PUBLIC CO LTD
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