Method for producing high-purity alpha-olefin by adopting backpack type reactive distillation device

A high-purity, olefin technology, applied in separation methods, chemical instruments and methods, hydrocarbon purification/separation, etc., can solve problems such as lack of high-purity, improve catalytic efficiency and service life, achieve single-column separation, adsorption capacity big effect

Active Publication Date: 2021-08-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a lack of reports on the preparation method of high-purity α-olefins, and it is necessary to develop a preparation method for the preparation of high-purity α-olefins to meet the needs of α-olefins in special fields

Method used

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  • Method for producing high-purity alpha-olefin by adopting backpack type reactive distillation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: ZnO-ZrO 2 / Synthesis of ZSM molecular sieve

[0042] Under stirring conditions, 2.85g water glass (Na 2 SiO 3 9H 2 (2, molecular weight 284g / mol), 300g aluminum isopropoxide, 350g deionized water join in 1.83g n-butylamine and mix;

[0043] After mixing evenly, add 5.95g of Zn(NO 3 ) 2 ·6H 2 O, 0.68g of Zr(NO 3 ) 4 ·5H 2 O. 2.30g of glycolic acid, put the beaker in a water bath and stir at 80°C to fully dissolve it. After the solid is completely dissolved, transfer it to an oven at 170°C for hydrothermal reaction for 36 hours. After the reaction, evaporate to obtain viscosity Gel, put it into a muffle furnace after grinding, and keep it at 500°C for 4h to get ZnO-ZrO 2 / ZSM molecular sieves as heterogeneous catalysts.

[0044] Similarly, repeat the above preparation process without adding Zn(NO 3 ) 2 ·6H 2 O and Zr(NO 3 ) 4 ·5H 2 O, to obtain silica-alumina molecular sieves that do not contain active double metal oxides as adsorbents.

Embodiment 2

[0045] Example 2: ZnO-ZrO 2 / Synthesis of ZSM molecular sieve

[0046] Under stirring condition, 2.84g water glass (Na 2 SiO 3 9H 2 (2, molecular weight 284g / mol), 370g aluminum nitrate, 560g deionized water join in 1.5g n-butylamine and mix;

[0047] After mixing evenly, add 3.56g of Zn(NO 3 ) 2 ·6H 2 O, 0.68g of Zr(NO 3 ) 4 ·5H 2 O. 1.52g of glycolic acid, put the beaker in a water bath and stir at 90°C to make it fully dissolve. After the solid is completely dissolved, transfer it to an oven at 160°C for hydrothermal reaction for 24 hours. After the reaction, evaporate to obtain viscosity Gel, put it into the muffle furnace after grinding, and keep it at 550°C for 3h to get ZnO-ZrO 2 / ZSM molecular sieves as heterogeneous catalysts.

[0048] Similarly, repeat the above preparation process without adding Zn(NO 3 ) 2 ·6H 2 O and Zr(NO 3 ) 4 ·5H 2 O, to obtain silica-alumina molecular sieves that do not contain active double metal oxides as adsorbents.

Embodiment 3

[0049] Example 3: ZnO-ZrO 2 / Synthesis of ZSM molecular sieve

[0050] Under stirring conditions, 2.1g of silica sol (SiO 2 ·8H 2 (2), 400g aluminum isopropoxide, 820g deionized water join in 3.0g di-n-propylamine and mix;

[0051] After mixing evenly, add 11.58g of Zn (NO 3 ) 2 ·6H 2 O, 1.02g of Zr(NO 3 ) 4 ·5H 2 O. 3.04g of glycolic acid, put the beaker in a water bath and stir at 80°C to fully dissolve it. After the solid is completely dissolved, transfer it to an oven at 180°C for hydrothermal reaction for 48 hours. After the reaction, evaporate to obtain viscosity Gel, put it into the muffle furnace after grinding, and keep it at 550°C for 3h to get ZnO-ZrO 2 / ZSM molecular sieves as heterogeneous catalysts.

[0052] Similarly, repeat the above preparation process without adding Zn(NO 3 ) 2 ·6H 2 O and Zr(NO 3 ) 4 ·5H 2 O, to obtain silica-alumina molecular sieves that do not contain active double metal oxides as adsorbents.

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Abstract

The invention relates to a method for producing high-purity alpha-olefin by using a backpack type reactive distillation device. The method is characterized in that olefin is used as a raw material, and the high-purity alpha-olefin is produced by using the backpack type reactive distillation device. The backpack type reactive rectification device comprises a raw material preheater, a rectification tower, an adsorber and a backpack reactor, wherein the backpack reactor is filled with a ZnO-ZrO2 / ZSM molecular sieve serving as an isomerization catalyst and playing a role in heterogeneously forming alpha-olefin from internal olefin; the adsorber is filled with an adsorbent, so the effect of guaranteeing the stability of the isomerization catalyst is achieved; and efficient structured packing or tower plates are arranged in the rectification tower and play a role in separating the alpha-olefin from the internal olefin. According to the method, high-purity alpha-olefin is continuously extracted from a tower top. The method has the advantages of high universality, greatly improved isomerization conversion rate, high product purity and the like, and has good application prospects.

Description

technical field [0001] The invention relates to the field of chemistry and chemical engineering, in particular to a method for producing high-purity α-olefins using a knapsack-type reactive distillation device. Background technique [0002] Common ethylene oligomerization products, propylene dimer, propylene trimer, propylene tetramer, isobutene dimer, isobutene trimer and other olefins can be prepared by hydroformylation to the corresponding aldehydes, alcohols, acids And esters and other valuable derivatives. [0003] For most downstream applications, the above-mentioned olefins are mixed olefins of various isomers, such as diisobutene, which is an important chemical intermediate, usually 2,4,4-trimethyl-1-pentene (α- DIB) and 2,4,4-trimethyl-2-pentene (β-DIB), the ratio of the two is about 74-76:24-26, which can be used to synthesize octylphenol, isononanoic acid, iso- Nonanol, isooctyl (2,4,4-trimethyl-pentyl) phosphate and other products. However, in downstream appli...

Claims

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Application Information

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IPC IPC(8): B01J29/06B01D3/00B01D3/14C07C5/25C07C7/00C07C7/04C07C11/02
CPCC07C5/2518C07C7/005C07C7/04B01J29/06B01D3/009B01D3/14B01D3/143C07C11/02Y02P20/10
Inventor 任亚鹏王旭陈来中黄少峰杨在刚许振成黎源
Owner WANHUA CHEM GRP CO LTD
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