A method for effectively separating and purifying 2-methylnaphthalene from washing oil

A technology for methyl naphthalene and oil washing, which is used in chemical instruments and methods, hydrocarbon purification/separation, crystallization purification/separation, etc., can solve problems such as unsatisfactory yield, and achieve low preparation cost, excellent mechanical properties, and easy operation. simple effect

Active Publication Date: 2021-07-09
PENG CHEN NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the 2-methylnaphthalene obtained by the above method has high purity, the yield is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method of effectively separating pure 2-methylnnaphthalene from wash oil, including the following steps:

[0023] (1) The aluminum sulfate is dissolved in deionized water, and the mass concentration of 20% is obtained; the mass concentration of 13% is added to the aluminum sulfate solution to prepare a mixed solution A; wherein the aluminum sulfate solution, The mass ratio of the citric acid solution is 8: 1;

[0024] (2) Sodium hydroxide, triethanolamine is dissolved in deionized water to prepare mixed solution B; the mixed solution A is placed in the reaction kettle, and the prepared mixed solution B is slowly added to the mixed solution A, after the addition is completed. The temperature was slowly warmed to 60-80 ° C, stirred for 2 h, then added a silica sol, stirred and mixed, reacting the reaction kettle within the water heat emissation, 150 ° C for 20 hours, the reaction was completed, and titanium was added to the reactor Tetrates, stirring and binding, stirring, ...

Embodiment 2

[0029] A method of effectively separating pure 2-methylnnaphthalene from wash oil, including the following steps:

[0030] (1) The aluminum sulfate is dissolved in deionized water, and the mass concentration of 20% is obtained; the mass concentration of 13% is added to the aluminum sulfate solution to prepare a mixed solution A; wherein the aluminum sulfate solution, The mass ratio of the citric acid solution is 8: 1.5;

[0031] (2) Sodium hydroxide, triethanolamine is dissolved in deionized water to prepare mixed solution B; the mixed solution A is placed in the reaction kettle, and the prepared mixed solution B is slowly added to the mixed solution A, after the addition is completed. The temperature was slowly warmed to 60-80 ° C, stirred for 6 h, then added a silica sol, stirred and mixed, reacted in a water hot oven, 180 ° C for 30 hours, and then cooled to room temperature, add titanium to the reactor Tetrates, stirring and binding, stirring, mixing for 6 h, filtered, filtere...

Embodiment 3

[0036] A method of effectively separating pure 2-methylnnaphthalene from wash oil, including the following steps:

[0037] (1) The aluminum sulfate is dissolved in deionized water, and the mass concentration of 20% is obtained; the mass concentration of 13% is added to the aluminum sulfate solution to prepare a mixed solution A; wherein the aluminum sulfate solution, The mass ratio of the citric acid solution is 8: 1.1;

[0038] (2) Sodium hydroxide, triethanolamine is dissolved in deionized water to prepare mixed solution B; the mixed solution A is placed in the reaction kettle, and the prepared mixed solution B is slowly added to the mixed solution A, after the addition is completed. The slow temperature was slowly warmed to 60-80 ° C, stirred for 3 h, then adding a silica sol, stirring mixed, reacting the reaction kettle within the water heat oven, 160 ° C for 22 hours, after the reaction was completed, and titanium was added to the reactor Tetrates, stirring, stirring, and mix...

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PUM

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Abstract

The invention discloses a method for effectively separating and purifying 2-methylnaphthalene from washing oil, comprising the following steps: first preparing a catalyst; then adopting a rectification tower A, an isomerization reactor and a rectification tower B to form a device, To prepare the target product, first place the washing oil fraction in the rectification tower A for vacuum distillation to obtain a methylnaphthalene-enriched liquid, then place the obtained methylnaphthalene-enriched liquid in an isomerization reactor and add the self-made The catalyst is reacted, and the filtered liquid is placed in rectification tower B for vacuum distillation, and finally frozen and crystallized, squeezed to obtain the target product. The method is simple in operation, low in preparation cost, and the prepared solvent has good storage stability, high boiling point and high yield.

Description

Technical field [0001] The present invention relates to the preparation method of methylnaphthalene, and in particular to a method of effective separating pure 2-methylnnaphthalene from the wash oil. Background technique [0002] The oil-filled fraction is a fraction of the tar to remove the fraction of 230 ° C to 300 ° C, which is generally 4.5% -6.5% of anhydrous tar, which is mainly a neutral component (about 90%), and the rest is alkaline. , Acidic components. The precious basic organic chemical raw materials such as quinoline, α-methyl naphthalene, β-methylnaphthalene, biphenyl, indole, 苊, anthracene, etc. are widely developed. Since the washing component has good stability and good solubility, it is mainly used to wash the bencene hydrocarbons and various organic gases of the absorbing gas from the coke oven gas. Most of the raw materials for fuel oils and carbon black are sold cheaply without reasonable utilization. [0003] 2-methyl naphthalene β-methyl naphthalene is an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C07C7/04C07C7/14C07C7/148C07C15/24B01J21/06B01J21/12B01J37/10B01J37/08
CPCB01J21/063B01J21/12B01J23/002B01J37/082B01J37/10C07C7/005C07C7/04C07C7/14C07C7/148C07C15/24
Inventor 谈勇谈俊江晓龙陈亮胡涛
Owner PENG CHEN NEW MATERIALS TECH CO LTD
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