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Benzene refining desulfurization adsorbent and preparation method thereof

A technology of adsorbent and reducing agent, applied in the field of benzene refining desulfurization adsorbent and its preparation, can solve the problems of high cost and unsuitable for large-scale use

Pending Publication Date: 2022-05-13
贵研工业催化剂(云南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent prepares acicular alumina, the cost is too high and it is not suitable for large-scale industrial use
[0006] The acicular alumina prepared by the above method has not been applied in palladium and platinum catalysts for the refined desulfurization reaction of benzene, so that benzene can reach the purity of refined benzene (sulfur content is less than 10ppb)

Method used

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  • Benzene refining desulfurization adsorbent and preparation method thereof
  • Benzene refining desulfurization adsorbent and preparation method thereof
  • Benzene refining desulfurization adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of needle-like alumina carrier with mesoporous structure and preparation of adsorbent

[0043] 1. Preparation of needle-shaped alumina carrier with mesoporous structure

[0044] Place 5 mol octadecanthaneal aluminum sulfate Al 2 (SO 4 ) 3 .18H 2 O dissolved in 1000mL deionized water and then transferred to a 5000mL PTFE container. Then add 3750 mL of aqueous ammonia solution with a concentration of 8 mol / L to the above solution, in an airtight container. At 140 °C at 340 rpm, pellet for 6 h. Finally, the filtration product was washed with deionized water to pH = 7, the resulting filter cake was dried in a vacuum at 70 °C for 10 h, the dried product was crushed and molded into about 2 mm particles, dried at 150 °C for 4 hours, and calcined at 570 °C for 6 h to obtain an alumina carrier. The ammonia precipitant with Al 3+ The molar ratio is 6:1, and the length of the needle-shaped alumina carrier is about 18um.

[0045] 2. Preparation of adsorbent

[0046] The pre...

Embodiment 2

[0049] Preparation of needle-like alumina carrier with mesoporous structure and preparation of adsorbent

[0050] 1. Preparation of needle-shaped alumina carrier with mesoporous structure

[0051] 5 mol aluminum nitrate (Al(NO 3 ) 3 ·9H 2 O) Dissolve in 1000mL deionized water and then transfer to a 5000mL PTFE container. Then add 6000 mL of urea solution at a concentration of 5 mol / L to the above solution in an airtight container. At 150 °C at 300 rpm, pellet for 7 h. Finally, the filter product was washed with deionized water to pH = 7, the resulting filter cake was dried in vacuo at 80 °C for 12 h, the dried product was crushed and molded into about 2mm particles, dried at 160 °C for 3 hours, and roasted at 550 °C for 4h to obtain an alumina carrier. The urea precipitant with Al 3+ The molar ratio is 6:1, and the needle-shaped alumina carrier length is about 20um.

[0052] 2. Preparation of adsorbent

[0053] The precursor chloroplatinic acid (H. 20.1) with a platinum mass conte...

Embodiment 3

[0056]Preparation of needle-like alumina carrier with mesoporous structure and preparation of adsorbent

[0057] 1. Preparation of needle-shaped alumina carrier with mesoporous structure

[0058] 4mol aluminum hexahydrate (AlCl 3 ·6H 2 O) Dissolve in 1000mL deionized water and then transfer to a 5000mL PTFE container. Then add 3000 mL sodium hydroxide solution at a concentration of 6 mol / L to the above solution in an airtight container. At 160 °C at 320 rpm, pellet for 7 h. Finally, the filter product was washed with deionized water to pH = 7, the resulting filter cake was dried in vacuo at 80 °C for 12 h, the dried product was crushed and molded into about 2 mm particles, dried at 130 °C for 5 hours, and roasted at 530 °C for 7 h to obtain an alumina carrier. The sodium hydroxide precipitant with Al 3+ The molar ratio is 4.5:1, and the needle-like alumina carrier length is about 22um.

[0059] 2. Preparation of adsorbent

[0060] Called platinum nitrate with a mass content of 0....

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Abstract

The invention relates to a benzene refining desulfurization adsorbent which takes needle-shaped aluminum oxide with a mesoporous structure as a carrier and chlorine-free noble metal Pt as an active component, and the loading capacity of the active component platinum is 0.4-1.5 wt% of the mass of the adsorbent. Pt particles are loaded on the surface of porous needle-shaped aluminum oxide to form the chlorine-free, high-stability and high-dispersion benzene refining desulfurization adsorbent.

Description

Technical field [0001] The present invention relates to a benzene refined desulfurization adsorbent and a preparation method thereof. Background [0002] Benzene is an important chemical raw material that is widely used in the production of dyes, pharmaceuticals, epoxy resins, plastics and rubber. In recent years, with the development of coal chemical industry, the market demand for refined benzene as raw material has been increasing. However, refined benzene usually also contains trace amounts of aromatic sulfides (thiophene, benzothiophene and dibenzothiophene, etc.), the presence of which can lead to inactivation of poisoning of the downstream ruthenium zinc catalyst for the hydrogenation of benzene to prepare cyclohexene. At present, the industry mainly adopts the method of adsorption desulfurization to remove aromatic sulfides in benzene to meet production needs. Because benzene and thiophene have similar chemical and physical properties, and there is competitive adsorption...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/02B01J20/30B01J20/28B01D15/08C07C7/148C07C15/04
CPCB01J20/08B01J20/0225B01J20/0233B01J20/28011B01J20/28083B01J20/28061B01D15/08C07C7/148C07C15/04
Inventor 谢继阳戴云生沈亚峰张峰杨存坤唐春周伟吴美岩杨善晓
Owner 贵研工业催化剂(云南)有限公司
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