Coked crude phenol refining device and method

A technology of coking crude phenol and refining equipment, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., and can solve problems such as lack of technological advancement and practicability, inability to stabilize distillation, and increased energy consumption of distillation

Inactive Publication Date: 2015-12-30
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operating conditions of this patent are obtained by distillation from coal gasification crude phenol as raw material, which is not suitable for processing coked crude phenol raw material, that is, the qualified phenol product cannot be produced by processing coked crude phenol according to the patent conditions
In this patent, deslagging is performed first,

Method used

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  • Coked crude phenol refining device and method
  • Coked crude phenol refining device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0070] For the raw material liquid of a certain coking crude phenol, the flow rate is 1200l / h into the dehydration tower for dehydration, the water is separated from the top of the tower to 216l / h, the crude phenol from the bottom of the tower enters the de-weighting tower, and the phenol fraction produced at the top of the tower is 1039l / h h, into the phenol fraction tank T-3430. 900 l / h of the phenol fraction through dehydration and weight removal enters the adsorption reaction tower equipped with a mercaptan catalyst, and enters the phenol tower after leaving the tower. Cresol etc. 6.71%.

[0071] The operating conditions of the dehydration tower 1 are: the operating pressure at the top of the tower is 29.67KPa, the reflux ratio is 1.0, the temperature at the top of the tower is 71.6°C, and the temperature at the bottom of the tower is 145.5°C. The operating conditions of the weight removal tower 2 are as follows: the operating pressure at the top of the tower is 11.1KPa, ...

Embodiment 2

[0074] For a raw material solution of coking crude phenol, the flow rate is 999.6l / h into the dehydration tower for dehydration, and the water is separated from the top of the tower to 195.9l / h. The crude phenol from the bottom of the tower enters the de-weighting tower, and the phenol fraction is produced at the top of the tower 867.2l / h, into the phenol fraction tank T-3430. The 899.4l / h phenol fraction through dehydration and weight removal enters the adsorption reaction tower equipped with a sweetening catalyst, and enters the phenol tower after leaving the tower. It is composed of phenol 50.64%, o-cresol 11.15%, m-p-cresol 29.74%, di Cresol etc. 7.14%.

[0075] The operating conditions of the dehydration tower 1 are: the operating pressure at the top of the tower is 29.24KPa, the reflux ratio is 1.0, the temperature at the top of the tower is 69.51°C, and the temperature at the bottom of the tower is 149.38°C. The operating conditions of the weight removal tower 2 are as...

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Abstract

The invention provides a coked crude phenol refining device. The device adopts the scheme that a crude phenol pre-distillation system, an impurity conversion system and a refining distillation system are sequentially connected through pipelines, wherein the crude phenol pre-distillation system is composed of a dehydration tower and a de-heavy tower, which are connected; the impurity conversion system is composed of a middle tank and an adsorption reaction tower, which are connected; the refining distillation system is composed of a phenol tower, an o-cresol tower and a m-cresol and p-cresol tower, which are connected in sequence. According to the invention, the problem of impurity removal in the adsorption reaction tower is solved through a sweetening catalyst, so that the fact that a liquid oxidizing agent is added into raw material crude phenol is avoided and the operation and control are simpler and more convenient; the conventional intermittent distillation process of phenol fractions is eliminated, so that the whole crude phenol refining process becomes very refined and the processing cost of products is reduced greatly; the whole production process flow is reasonable, the device is high in automation degree, the product quality is high and the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of distillation and separation of chemical materials, and relates to a refining device and method for improving the purity of coked phenol products and shortening the separation process, in particular to a refining device and method for coking crude phenol Background technique [0002] Phenolic products were separated and refined from coal tar in the early days, and there are still many domestic coking enterprises producing such products. Now there are a large number of phenol and o-cresol products that can be produced by chemical synthesis. According to statistics, more than 92% of phenol in the world is currently produced by the cumene method, and phenol with a purity of more than 99.9% can be obtained, which meets the requirements for the production of polycarbonate. [0003] In the coking industry, the recovery of phenol mainly uses 10% to 12% sodium hydroxide to wash the distilled fraction of tar and t...

Claims

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Application Information

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IPC IPC(8): C07C37/68C07C37/86C07C37/74C07C39/04C07C39/07
Inventor 许健陆卫民施非非卜士明樊宏胡骏毅闻科戴中严俞彩云
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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