Method for processing phenol-contained tar

A processing method and technology for phenol tar, applied in chemical instruments and methods, preparation of organic compounds, inorganic chemistry, etc., can solve the problems of waste of resources and difficult recovery of phenolic products, save processing costs, improve product yield, The effect of avoiding emissions

Active Publication Date: 2011-05-11
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of resource waste caused by the difficulty in recycling phenolic products in phenol-containing tar and the fact that phenol-containing tar can only be incinerated as solid waste

Method used

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  • Method for processing phenol-contained tar
  • Method for processing phenol-contained tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Accurately weighed 1g of phenol-containing tar and 100g of distilled water were placed in a 200ml flask with a condensing device, refluxed for 30 minutes, and then filtered to obtain a tar filtrate. The content of hydroquinone in the tar filtrate was analyzed by liquid chromatography, and the analysis results showed that the content of hydroquinone in the phenolic tar was 12.5%.

[0019] Another sample of phenol-containing tar was taken, and the carbon, hydrogen, and oxygen elements were quantified by an elemental analyzer. The test results showed that the carbon element content in the phenol-containing tar was 65.4%, the hydrogen element content was 3.6%, and the oxygen element content was 30.9%.

[0020] Take 100g of phenol-containing tar (containing 12.5g of hydroquinone), crush it to 20 mesh, raise the temperature from 100°C to 600°C in a carbonization furnace at a rate of 2°C / min, and stay there for 1 hour, while raising the temperature at a rate of 30ml / min. Conti...

Embodiment 2

[0024] In addition to taking 100g of phenol-containing tar (containing 12.5g of hydroquinone), the temperature was raised from 100°C to 900°C at a rate of 3°C / min in the carbonization furnace, and stayed for 1 hour. N 2 Carry out purging, the tail gas enters the small spray tower and absorbs the molten state phenol of 60 ℃ as the solvent, other steps and methods are the same as in Example 1; the tail gas is absorbed by the molten phenol solvent, and the recovery rate of hydroquinone is 96.5%. The test results of the carbonized product are shown in Table 2. All indicators meet the requirements of coal-based activated carbon, and the ash content is very small.

[0025] Table 2

[0026]

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PUM

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Abstract

The invention relates to a method for processing phenol-contained tar, in particular to a method for preparing an active carbon by utilizing a phenolic tar and simultaneously recycling the phenol product with high additional value therein. The method comprises the following steps of: adding the phenol-contained tar in a carbonizing furnace, heating the carbonizing furnace and leading the gas intothe carbonizing furnace for sweeping and blowing; obtaining the active carbon after carbonizing; cooling and absorbing the hydroquinone product in the tail gas by utilizing a solvent; and returning the product to a separating and refining system of phenol hydroxylation process so as to recycle the hydroquinone product. The method has simple operation, converts the phenol-contained tar into the active carbon commodity with utilizable values, can recycle most of the hydroquinone product residual in the phenol-contained tar simultaneously, avoid resource wasting, reduce the processing expense ofthe solid wastes simultaneously and improve the yield of the product obviously.

Description

technical field [0001] The invention relates to a method for preparing activated carbon by using phenol-containing tar produced in the process of phenol hydroxylation to produce ortho / hydroquinone as a raw material, and recovering high value-added phenolic substances contained in the phenol tar during the preparation of activated carbon . Background technique [0002] During the hydroxylation reaction of phenol and hydrogen peroxide to produce catechol and hydroquinone, a certain amount of solid waste—“phenol-containing tar” is produced as a by-product. Since phenolic tar contains a large amount of toxic volatile components, burning it in an open environment will cause serious air pollution, so it is difficult to recover heat as a fuel. For the sake of environmental protection, phenol tar generally needs to be incinerated in a special incinerator during the normal production process. In this case, it is impossible to recover a large amount of high value-added phenolic subs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/10C07C39/08C07C37/68C01B32/336
Inventor 许宁赵志宏冯世强邵敬铭
Owner SHANGHAI HUAYI NEW MATERIAL
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