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Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10

A methylnaphthalene, high-purity technology, applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., can solve the problems of low yield, high cost, complex process, etc., and achieve high product purity and cost. Low and high economic and social benefits

Inactive Publication Date: 2013-09-11
天津市兴源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complex in process, uses a large amount of solvent, has high cost and low yield

Method used

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  • Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10
  • Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10
  • Process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] will reform aromatics C 10 50t of raw materials are continuously passed into the rectification tower with corrugated screen high-efficiency packing (model CY-700Y), the vacuum degree is controlled at 0.095Mpa, and the methylnaphthalene fraction is obtained at the top of the tower, with a distillation range of 235 - 254°C, β-methylnaphthalene content 53.4156wt%, α - The content of methylnaphthalene is 26.1324wt%, and the content of naphthalene is 0.2328wt%. - Between 5°C, the refined components are obtained by separating them with a centrifuge, the content of β-methylnaphthalene is 82.2567wt%, and the refined components are passed into a continuous multi-stage countercurrent fractional crystallizer, and the crystallization temperature is - Between 35°C, 1.52t of finished β-methylnaphthalene was obtained after refining, the content of β-methylnaphthalene was 99.2461wt%, and the yield of β-methylnaphthalene was 22.79%.

[0026] Among them: the refined components are pass...

Embodiment 2

[0028] will reform aromatics C 10 50t of raw materials are continuously passed into the rectification tower with corrugated wire mesh high-efficiency packing (model CY-700Y), the vacuum degree is controlled at 0.095Mpa, and the methylnaphthalene fraction is obtained at the top of the tower, with a distillation range of 237 - 255°C, β-methylnaphthalene content 55.0937wt%, α - The content of methylnaphthalene is 25.7332wt%, and the content of naphthalene is 0.1841wt%. - Between 10°C, the refined components are obtained by centrifuge separation, the content of β-methylnaphthalene is 83.4622wt%, and the refined components are passed into a continuous multi-stage countercurrent fractional crystallizer, and the crystallization temperature is 23 - Between 33°C, 1.61t of finished β-methylnaphthalene was obtained after refining, the content of β-methylnaphthalene was 99.073wt%, and the yield of β-methylnaphthalene was 24.14%.

Embodiment 3

[0030] will reform aromatics C 10 50t of raw material is continuously passed into the rectification tower with corrugated wire mesh high-efficiency packing (model CY-700Y), the vacuum degree is controlled at 0.095Mpa, and the methylnaphthalene fraction is obtained at the top of the tower, with a distillation range of 236 - 253°C, β-methylnaphthalene content 54.232wt%, α - The content of methylnaphthalene is 27.5347wt%, and the content of naphthalene is 0.1966wt%. - Between 10°C, the refined component was obtained by centrifuge separation, the content of β-methylnaphthalene was 83.2531wt%, and the refined component was passed into a continuous multi-stage countercurrent fractional crystallizer, and the crystallization temperature was 22 - Between 34°C, 1.58t of finished β-methylnaphthalene was obtained after refining, the content of β-methylnaphthalene was 99.1463wt%, and the yield of β-methylnaphthalene was 23.69%.

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Abstract

The invention relates to a process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10. The process method comprises the following steps of: by taking catalytically reformed by-product hydrocarbon C10 as a raw material and refined components as raw materials after carrying out rectification, freezing crystallization and refining on the catalytically reformed by-product hydrocarbon C10, putting the raw materials into a multistage countercurrent fractional crystallizer, and refining and extracting the beta-methylnaphthalene, so as to obtain the beta-methylnaphthalene with the purity high than 99%. The process method has the advantages of simple process, relatively low equipment investment and production cost, no polluted by-product and relatively high economic benefit and social benefit.

Description

technical field [0001] The present invention relates to a kind of reforming aromatics C 10 A process for extracting high-purity β-methylnaphthalene from China to catalytically reform the by-product aromatics C 10 It is a process of extracting high-purity β-methylnaphthalene after rectification, freezing crystallization and refining. Background technique [0002] β-Methylnaphthalene is a white crystal with a naphthalene-like odor and is mainly used in the production of vitamin K 3 , can also be used as raw materials for fine chemical products such as pesticides, pharmaceutical intermediates, dyes, etc., and has a wide range of applications in the field of fine chemicals. [0003] β-Methylnaphthalene is usually extracted from coal tar washing oil fractions, but because coal tar has complex components and contains acidic and alkaline substances, it needs to be extracted after acid-base washing. The entire extraction process is complicated and cumbersome, which is not conduci...

Claims

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Application Information

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IPC IPC(8): C07C15/24C07C7/00
Inventor 王明辉刘玉江刘海瑞
Owner 天津市兴源化工有限公司
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