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Preparation method of mixed aromatic hydrocarbons

A technology for mixing aromatics and mixtures, applied in the field of preparation of mixed aromatics

Inactive Publication Date: 2018-11-06
陈久仓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials used in high-temperature coal dry distillation, hydrocarbon cracking, catalytic reforming, aromatization of low-carbon alkanes, aromatization of liquefied gas and methanol to gasoline are all disposable and non-renewable chemical raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of mixed aromatics, comprising the following steps:

[0026] (1) Mix and gasify the raw material and the catalyst, and react under high temperature and high pressure to generate a mixture of mixed aromatics and by-products;

[0027] (2) sending the mixture prepared in step (1) into a fractionating tower for fractionation to obtain mixed aromatics and by-products;

[0028] (3) high-temperature gasification of by-products, adding an oxidizing agent for oxidation reaction to generate mixed aromatics;

[0029] (4) Mix the mixed aromatics prepared in step (2) and step (3), and send them to a rectification tower for rectification to prepare mixed aromatics.

[0030] The raw material is composed of ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone, and the mass ratio of said ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone is: 30:5:25:12 :8:4.

[0031] The catalyst is composed of the following raw materials in parts by weight: 5...

Embodiment 2

[0040] A preparation method of mixed aromatics, comprising the following steps:

[0041] (1) Mix and gasify the raw material and the catalyst, and react under high temperature and high pressure to generate a mixture of mixed aromatics and by-products;

[0042] (2) sending the mixture prepared in step (1) into a fractionating tower for fractionation to obtain mixed aromatics and by-products;

[0043] (3) high-temperature gasification of by-products, adding an oxidizing agent for oxidation reaction to generate mixed aromatics;

[0044] (4) Mix the mixed aromatics prepared in step (2) and step (3), and send them to a rectification tower for rectification to prepare mixed aromatics.

[0045] The raw material is composed of ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone, and the mass ratio of the ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone is: 40:2:20:15 :9:5.

[0046] The catalyst is composed of the following raw materials in parts by weight: 80...

Embodiment 3

[0055] A preparation method of mixed aromatics, comprising the following steps:

[0056](1) Mix and gasify the raw material and the catalyst, and react under high temperature and high pressure to generate a mixture of mixed aromatics and by-products;

[0057] (2) sending the mixture prepared in step (1) into a fractionating tower for fractionation to obtain mixed aromatics and by-products;

[0058] (3) high-temperature gasification of by-products, adding an oxidizing agent for oxidation reaction to generate mixed aromatics;

[0059] (4) Mix the mixed aromatics prepared in step (2) and step (3), and send them to a rectification tower for rectification to prepare mixed aromatics.

[0060] The raw material is composed of ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone, and the mass ratio of the ethane, butane, n-hexane, ethylene, amyl alcohol, and acetone is: 50:3:30:13 :10: 3.

[0061] The catalyst is composed of the following raw materials in parts by weight: 7...

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PUM

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Abstract

The invention discloses a preparation method of mixed aromatic hydrocarbons, and relates to the technical field of aromatic hydrocarbon preparation; and the preparation method is as follows: (1) mixing and gasifying raw materials and a catalyst, and reacting under high temperature and high pressure to form a mixture of mixed aromatic hydrocarbons and by-products; (2) sending the mixture prepared by the step ( 1) to a fractionation column for fractionation to obtain the mixed aromatic hydrocarbons and the by-products; (3) gasifying the by-products at a high temperature, and adding an oxidizingagent for oxidation reaction to form mixed aromatic hydrocarbons; (4) mixing the mixed aromatic hydrocarbons of the steps (2) and (3), and sending the mixed aromatic hydrocarbons into a rectificationcolumn for rectification to obtain the mixed aromatic hydrocarbons; the mixed aromatic hydrocarbons can be prepared in one step by reacting the selected raw materials and the special catalyst withoutcomplicated multiple processes, the preparation process is simple, and the raw materials used are not disposable chemical raw materials.

Description

Technical field: [0001] The invention relates to the technical field of aromatics preparation, in particular to a method for preparing mixed aromatics. Background technique: [0002] At present, the production of aromatic hydrocarbons is obtained from fossil resources such as coal or petroleum through three reaction processes: coal high-temperature dry distillation, hydrocarbon cracking, and catalytic reforming; especially the latter two processes that use petroleum hydrocarbons as raw materials. Aromatic hydrocarbons account for more than 90% of the world's total production of aromatic hydrocarbons. Wherein, in ethane, propane is the pyrolysis gasoline of 2-5% (raw material quality) by-product in the ethylene process of raw material cracking, is rich in the aromatic hydrocarbon compound of about 50-70% (mass) in the pyrolysis gasoline; When oil and light diesel oil are raw materials, 15-24% (mass quality) of pyrolysis gasoline is produced as a by-product, and the pyrolysis...

Claims

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Application Information

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IPC IPC(8): C07C2/86C07C5/42C07C15/02C07C15/00B01J31/28
CPCB01J31/28C07C2/862C07C5/42C07C2531/28C07C15/02C07C15/00
Inventor 陈久仓
Owner 陈久仓
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