Continuous refinement separation device and method of coked crude phenol

A technology of coking crude phenol and rectification separation, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of inappropriate large-scale treatment of coking crude phenol, poor stability of product quality, and energy consumption in the separation process Large and other problems, to achieve good economic and social benefits, high product quality, low process energy consumption

Inactive Publication Date: 2013-01-23
天津美科泰化工科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, due to the process characteristics of batch rectification and the heat-sensitive characteristics of phenolic compounds, there must be phenomena such as decomposition and carbonization of phenolic compounds in the separation process of batch rectification, which will affect the quality and yield of products, so that the whole process The stability of the product quality is poor. At the same time, the transitional fraction between the components in the batch rectification process requires repeated rectification, which also results in a large energy consumption in the entire separation process. Obviously, from the perspective of process reliability and economy Generally speaking, the device and process for refining and separating crude phenol by batch distillation are no longer suitable for large-scale treatment of coked crude phenol

Method used

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  • Continuous refinement separation device and method of coked crude phenol

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] For the coal tar crude phenol raw material liquid of a coking plant (the flow rate is 2500.0kg / h, the components are phenol 24.0%, o-cresol 16.0%, m-p-cresol 20.0%, water 8.0%, xylenol 14.0%, weight Phenol 18.0%), first its 3.0% sulfuric acid solution (40.0wt%) enters the primary static mixer together, and the addition is 3.0% of the crude phenol raw material, then enters after fully mixing in the primary stirring tank with a certain rotating speed Wiped-film evaporator, after the material enters the phenol residue removal tower in the gas phase, the phenol residue is continuously discharged from the bottom, and the crude phenol raw material distilled from the top and hydrogen peroxide solution (30.0wt%) enter the secondary stirring tank and buffer tank in sequence, and the addition amount is 1.0% of the crude phenol flow rate, the acid slag is discharged from the bottom of the buffer tank, and the treated crude phenol enters the phenol refining tower, o-cresol refining ...

Embodiment 2

[0035] Aiming at the crude phenol raw material liquid recovered in the lignite pressurized gasification phenol-containing wastewater of a certain enterprise factory (the flow rate is 2980.0kg / h, and the components are 38.0% phenol, 10.0% o-cresol, 28.0% m-p-cresol, and 7.0% water %, xylenol 15.0%, heavy phenol 18.0%), at first it enters the first-stage static mixer together with sulfuric acid solution (60.0wt%), and the addition is 5.0% of the crude phenol raw material, then with a certain rotating speed in a The first-stage stirring tank is fully mixed and then enters the wiped-film evaporator. After the material enters the dephenol slag tower in the gas phase, the phenol residue is continuously discharged from the bottom, and the crude phenol raw material distilled from the top and hydrogen peroxide solution (30.0wt%) enter the second-stage stirring tank in turn. And a buffer tank, the addition amount is 3.0% of the crude phenol raw material, the acid slag is discharged from ...

Embodiment 3

[0037] For the coking crude phenol raw material solution (3000.0kg / h) of a coking plant, the components are phenol 22.0%, o-cresol 14.0%, m-p-cresol 18.0%, water 6.0%, xylenol 28.0%, heavy phenol 12.0% ), at first it enters the primary static mixer together with sulfuric acid solution (50.0wt%), and the add-on is 4.0% of the crude phenol raw material and enters the wiped film evaporator after fully mixing in the primary stirring tank with a certain rotating speed then, After the material enters the dephenol residue tower in the gas phase, the phenol residue is continuously discharged from the bottom, and the crude phenol raw material distilled from the top and hydrogen peroxide solution (30.0wt%) enter the secondary stirring tank and buffer tank in turn, and the addition is 2.0% of the crude phenol raw material , the acid slag is discharged from the bottom of the buffer tank, and the treated crude phenol enters the phenol refining tower, o-cresol refining tower and m-p-cresol r...

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Abstract

The invention relates to a continuous refinement separation device and method of coked crude phenol. The continuous refinement separation device comprises a static mixer 1, a first stage pretreatment acid-adding unit composed of a first stage mixing slot 2 and a wipe film evaporator 3, a second stage pretreatment oxidation unit composed of a second stage mixing slot 4 and a buffer tank, a phenol residue removing tower 6 and a rectification tower system composed of a dewatering tower 7, a phenol refinement tower 8, a orthocresol refinement tower 9 and a m,p-cresol refinement tower 10, wherein the first stage pretreatment acid-adding unit is connected with the phenol residue removing tower, the phenol residue removing tower is connected with the second stage pretreatment oxidation unit, andthen all devices of the refinement tower system are connected together in turn. The device and method of the invention can effectively performs processes of decoloring, deodorizing, desulfurizing, removing impurity and the like to the coked crude phenol raw material through reasonable design to obtain more than 99.5wt% of high purity phenol, more than 99.0wt% of high purity orthocresol, more than99.0wt% of high purity m,p-cresol and xylenol product. The whole process is reasonable, has high degree of automation and is characterized by low process energy consumption, high product quality, good stability and the like, thus the method of the invention is an effective and feasible coked crude phenol continuous refinement separation technology.

Description

technical field [0001] The invention belongs to a device and method for chemical separation process, and relates to a refining method of coking crude phenol, specifically a continuous rectification and separation device and method for coking crude phenol. Background technique [0002] Coking phenols are one of the main chemical products extracted from coal tar. The composition and yield of each crude phenol raw material are related to the coal blending composition, coal blending properties and the conditions of coal coke operation. On the one hand, its source comes from coal tar fractionation The phenol oil fraction produced in the coal gasification process, on the other hand, comes from the phenolic compounds extracted from the phenol-containing wastewater produced in the coal gasification process. The crude phenolic components of the two sources basically contain phenol, o-cresol, and m-p-cresol , water, xylenol, higher phenol and its asphalt and other impurities. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/07C07C39/04C07C37/68C07C37/74C07C37/86
Inventor 张力明王磊华超刘志云张帆石荣方张胜利王保彦
Owner 天津美科泰化工科技有限公司
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