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Adsorbent for adsorption and separation of polycyclic aromatic hydrocarbons and preparation method thereof

An adsorption separation, polycyclic aromatic hydrocarbon technology, applied in chemical instruments and methods, refined hydrocarbon oil, other chemical processes, etc., can solve the problems of low selectivity, low saturated adsorption capacity of polycyclic aromatic hydrocarbon adsorbents, etc., and achieve strong adsorption capacity Effect

Active Publication Date: 2019-08-27
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing polycyclic aromatic hydrocarbon adsorbent has a small saturated adsorption capacity and low selectivity, and is not suitable for adsorption and removal of a large amount of polycyclic aromatic hydrocarbons in diesel oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Pulverize the kaolin, roast it at 650°C for 4 hours at high temperature, and take 80g of it after cooling for later use.

[0036] (2) Preparation of guiding agent: take by weighing 15.04g sodium hydroxide (Tianjin Chemical Reagent Supply and Marketing Company, analytically pure, 96wt%), dissolve in 35.2g deionized water (self-made), stir and cool, add 4.46g sodium aluminate (Sinopharm Chemical Reagent Co., Ltd., analytically pure, 41wt%Al 2 o 3 , 28.7 wt% Na 2 (2), after fully dissolving, slowly add 60g water glass (self-made, 27wt% SiO 2 , 8% Na 2 O, 65%H 2 0), stir while adding, leave standstill after forming sol for 48 hours.

[0037] (3) Form sol: dissolve 30g sodium hydroxide in 420ml deionized water to form a sodium hydroxide solution, add 240g water glass into the sodium hydroxide solution, stir and cool for later use, continue to slowly add 80g roasting under stirring conditions After kaolin, continue stirring to form a homogeneous sol.

[0038] (4) A...

Embodiment 2

[0044] (1) Kaolin pretreatment is the same as in Example 1.

[0045] (2) The preparation of the directing agent is the same as in Example 1.

[0046] (3) Forming the sol is the same as in Example 1.

[0047] (4) Supplementary silicon source is the same as in Example 1.

[0048] (5) The aging crystallization conditions are the same as in Example 1.

[0049] (6) One exchange adopts 0.1mol / L magnesium nitrate solution, and other conditions are the same as in Example 1.

[0050] (7) The secondary exchange adopts 0.1mol / L copper nitrate solution, and other conditions are the same as in Example 1.

[0051] (8) The performance evaluation of the adsorbent is the same as in Example 1, and the evaluation of the adsorbent is shown in Table 2.

Embodiment 3

[0053] (1) Kaolin pretreatment is the same as in Example 1.

[0054] (2) The preparation of the directing agent is the same as in Example 1.

[0055] (3) Forming the sol is the same as in Example 1.

[0056] (4) Supplementary silicon source is the same as that of embodiment 1.

[0057] (5) The aging crystallization conditions are the same as in Example 1.

[0058] (6) One exchange adopts 0.1mol / L magnesium nitrate solution, and other conditions are the same as in Example 1.

[0059] (7) Secondary exchange adopts 0.1mol / L ferric nitrate solution, and other conditions are the same as in Example 1.

[0060] (8) The performance evaluation of the adsorbent is the same as in Example 1, and the evaluation of the adsorbent is shown in Table 2.

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Abstract

The invention relates to an adsorbent for adsorbing and separating polycyclic aromatic hydrocarbons and a preparation method thereof; the adsorbent is composed of a Y molecular sieve carrier and metal ions exchanged on the Y molecular sieve carrier in a particular order, wherein the metal ion content is 0.1 wt%-30 wt%. The preparation method of the adsorbent comprises that kaolin is firstly subjected to high temperature pretreatment activation, an appropriate amount of an active silicon source is added during synthesis, then a sol is subjected to dynamic aging crystallization, next the metal ions are subjected to ion exchange through two or multiple times of contact in a certain order, and thus the adsorbent is obtained. The adsorbent has a stronger adsorption capacity on the polycyclic aromatic hydrocarbons and can effectively adsorb and separate the polycyclic aromatic hydrocarbons in diesel oil, and the removal rate can reach 80%.

Description

technical field [0001] The invention relates to an adsorbent for adsorbing and separating polycyclic aromatic hydrocarbons and a preparation method thereof. Background technique [0002] Polycyclic aromatic hydrocarbons are compounds containing two or more aromatic rings such as naphthalene, methylnaphthalene, dimethylnaphthalene, etc. Polycyclic aromatic hydrocarbons are widely present in diesel oil. For diesel engines, polycyclic aromatic hydrocarbons in fuel oil Cetane has a low cetane number, is not suitable for combustion, and is also the main and root cause of smog emissions. The national standard GB19147-2013 for diesel for vehicles clearly stipulates that the content of polycyclic aromatic hydrocarbons should not exceed 11%. In actual production, the content of polycyclic aromatic hydrocarbons in diesel produced by catalytic cracking, coking, and other unit processes is far greater than 11%. [0003] An effective method to reduce the content of PAHs in diesel oil is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C10G25/03
Inventor 臧甲忠李滨范景新周立坤宫毓鹏马明超张健于海斌成宏刘洋
Owner CHINA NAT OFFSHORE OIL CORP
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