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Separation method of hexane isomer

A separation method and isomer technology, which are applied in separation methods, dispersed particle separation, adsorption purification/separation, etc. The effect of large pore volume and adjustable pore structure

Active Publication Date: 2021-07-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in view of the current porous materials, including molecular sieves and metal-organic framework materials, which have low selectivity for the separation of single-double branched hexane isomers, it is urgent to develop new separation materials and separation methods to achieve single-double branched hexane isomers. Separation of hexane isomers

Method used

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  • Separation method of hexane isomer
  • Separation method of hexane isomer
  • Separation method of hexane isomer

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Mix 10 mmol potassium hexacyanocobaltate with 100 mL deionized water, stir and dissolve to obtain potassium hexacyanocobaltate solution. Mix 18mmol zinc nitrate with 100mL deionized water, stir and dissolve to obtain a zinc nitrate solution. The potassium hexacyanocobaltate solution was added dropwise to the vigorously stirred zinc nitrate solution for reaction. After the dropwise addition, it was aged for 24 hours, and washed with deionized water several times to obtain a purified metal organic framework material. The purified metal organic framework material was vacuum degassed at 150 °C for 24 hours to obtain the metal organic framework material Zn 3 [Co(CN) 6 ] 2 . After testing, Zn 3 [Co(CN) 6 ] 2 It is a hexagonal crystal with a large window size of Specific surface area 863m 2 / g. Gas adsorption followed.

[0051] In order to test the practical effect of the above-synthesized MOFs on the separation of hexane isomers, the above-synthesized MOFs Zn 3 [...

Embodiment 2

[0055] Mix 10 mmol potassium hexacyanocobaltate with 100 mL deionized water, stir and dissolve to obtain potassium hexacyanocobaltate solution. Mix 18 mmol of nickel nitrate with 100 mL of deionized water, stir and dissolve to obtain a nickel nitrate solution. The potassium hexacyanocobaltate solution was added dropwise to the vigorously stirred nickel nitrate solution for reaction. After the dropwise addition, it was aged for 24 hours, and washed with deionized water several times to obtain a purified metal organic framework material. The purified MOFs were degassed under vacuum at 150 °C for 24 hours to obtain the desolvated MOFs Ni 3 [Co(CN) 6 ] 2 , after testing, Ni 3 [Co(CN) 6 ] 2 It is a cubic crystal form, and the size of the macropore window is Gas adsorption followed.

[0056] In order to test the practical effect of the above-synthesized metal-organic framework material on the separation of hexane isomers, the above-synthesized metal-organic framework mate...

Embodiment 3

[0066] The material prepared in Example 1 is subjected to a three-component gas mixture at normal temperature: n-hexane, 3-methylpentane, 2,2-dimethylbutane, nitrogen (nitrogen is an inert component) gas mixture circulation Regeneration penetration experiments. The result obtained is as Figure 12 It is shown that the material has excellent recycling performance.

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Abstract

The invention discloses a separation method of a hexane isomer. The separation method comprises the step of enabling a hexane isomer mixture to be in contact with an adsorbent for adsorption separation. The structural general formula of a metal organic framework material is M3 [T (CN) 6] 2, M is selected from Zn < 2 + > or Ni < 2 + >, and T is selected from one or more of Co < 3 + >, Fe < 3 + > and Ir < 3 + >. The metal frame material used in the method is good in separation effect, simple in material preparation process, low in cost and good in regeneration and repeatability, and has a wide industrial application prospect.

Description

technical field [0001] The invention relates to the field of chemical engineering and technology, in particular to a method for separating hexane isomers. Background technique [0002] Separation of hexane isomers to increase gasoline octane number (RON) is a very important unit operation in the petrochemical industry. The unit operation has important public health implications because it reduces the use of aromatic compounds currently added to increase the octane rating of gasoline. Significant amounts of hexane isomers are produced during the catalytic isomerization reaction, including at least 10% linear, approximately 50% monobranched and 40% doubly branched alkanes. The higher the degree of branching of alkanes, the higher the octane number, for example, monobranched alkanes 3-methylpentane (3MP; RON 75) and double branched alkanes 2,2-dimethylbutane (22DMB; RON94) has a much higher octane number than the straight chain alkane n-hexane (nHEX; RON 25). To obtain highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30B01D53/02C07C7/12C07C9/16
CPCB01J20/226B01J20/28054B01D53/02C07C7/12B01D2256/24C07C9/16Y02P20/10
Inventor 鲍宗必陈洁任其龙杨启炜郑芳张治国杨亦文苏宝根
Owner ZHEJIANG UNIV
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