Method for separating mixture of crude phenol and organic amine

A separation method and organic amine technology, which are applied in the purification/separation/stabilization of organic compounds, preparation of organic compounds, organic chemical methods, etc., can solve the problems of high production cost, many equipment units, large water consumption, etc. Achieve the effect of easy industrialization, simple separation process and low production cost

Pending Publication Date: 2020-08-25
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a separation method for a mixture of crude phenol and organic amine, which can quickly and thoroughly separate the crude phenol and organic amine, and solve the problem of existing crude phenol and organic amine. In the amine separation method, many times of water washing are required, the water consumption is too large, a large amount of energy consumption is required when recovering water, the production cost is high, there are too many equipment units, and the residual amount of organic amine in the crude phenol is high, and the separation process is simple. , continuous or intermittent, easy to scale up, easy to implement industrially, low production cost, etc.

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  • Method for separating mixture of crude phenol and organic amine
  • Method for separating mixture of crude phenol and organic amine
  • Method for separating mixture of crude phenol and organic amine

Examples

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Embodiment 1

[0085] A method for separating crude phenol and organic amine mixture, which is used to treat the crude phenol containing organic amine (containing 40% diethanolamine) obtained by extracting the phenol oil fraction (distillation range 170-230°C) from medium-temperature tar, Including the following steps:

[0086] Step a1, 1000kg of the crude phenol containing organic amine, 1200kg of water, 800kg of organic solvent xylene (ortho-xylene, m-xylene, and p-xylene each 1 / 3) are simultaneously added to the stirring reactor for mixing and stirring, and At the same time, a content of 60% CO was introduced into the bottom of the reactor 2 (The impurity components are water vapor and nitrogen), the gas-liquid is fully contacted and reacted, mixed and stirred at 65°C for 1.2h, then left to separate layers, and separated to obtain the phenol phase containing the organic solvent (that is, the crude phase from which diethanolamine has been removed) A mixed solution of phenol and xylene) an...

Embodiment 2

[0094] A separation method for a mixture of crude phenol and organic amine, used for extracting crude phenol containing organic amine (containing 60% 1,2-propylenediamine) obtained by extracting phenol oil fractions (130-280°C) from low-temperature tar processing, including the following steps:

[0095] Step b1, 1000kg of the crude phenol containing organic amine, 2000kg of water, and 500kg of organic solvent (secondary octanol:isooctanol=2:3) are simultaneously added to the stirred reactor for mixing and stirring. 80% CO is fed into the bottom 2 (The impurity components are water vapor and nitrogen), fully contact and react the gas-liquid, mix and stir at 70°C for 1.5h, then stand and separate the layers, and separate to obtain the phenol phase containing the organic solvent (that is, the 1,2- A mixed solution of crude phenol of propylenediamine and an organic solvent) and an aqueous phase containing an acidified aqueous solution of an organic amine (that is, an aqueous solu...

Embodiment 3

[0103] A method for separating crude phenol and organic amine mixture, which is used to treat the crude phenol containing organic amine obtained from medium temperature tar extraction (containing 70% ethanolamine and ethylenediamine, referred to as mixed amine in this embodiment), including Follow the steps below:

[0104] Step c1, adding 1000kg of the crude phenol containing organic amine, 1200kg of water, and 300kg of organic solvent (isopropyl ether: propyl ether = 1:1) into the stirring reactor at the same time and mixing and stirring, at the same time at the bottom of the reactor Introduce 90% CO 2 (The impurity components are water vapor and nitrogen), make the gas-liquid fully contact and react, mix and stir at 55°C for 1h, then stand and separate the layers, and separate to obtain the phenol phase containing the organic solvent (that is, the crude phenol phase from which the mixed amine has been removed) Mixed solution with organic solvent) and aqueous phase containin...

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Abstract

The invention discloses a method for separating a mixture of crude phenol and organic amine, which comprises the following steps: adding water and an organic solvent in the process of separating crudephenol containing organic amine by adopting an acidified water washing method, thereby obtaining a phenol phase containing the organic solvent and a water phase containing an organic amine acidifiedwater solution; rectifying the phenol phase containing the organic solvent to obtain crude phenol; and rectifying the aqueous phase containing the organic amine acidified aqueous solution to obtain the organic amine. According to the method, crude phenol and organic amine can be quickly and thoroughly separated, and the method has the advantages of simple separation process, continuous or intermittent separation, easiness in amplification, easiness in industrial implementation, low production cost and the like.

Description

technical field [0001] The invention relates to the technical field of separation of phenol by phenol oil extraction, in particular to a separation method of a mixture of crude phenol and organic amine. Background technique [0002] Raw material phenol oil comes from phenol oil of high, medium and low temperature coal tar, coal direct liquefaction, indirect liquefaction, and 170-230°C or wider fractions cut from various raw material oils, usually called phenol oil, of which The main components are phenols, neutral oils and some nitrogen-containing compounds. Phenolic substances mainly include phenol, o-cresol, m-p-cresol, xylenol, tricresol, etc. Phenols extracted from phenol oil—crude phenol is a valuable chemical raw material, and high-purity phenol products are widely used in medicine, dyes, engineering plastics, and fine chemicals. [0003] The traditional method of dephenolization is the acid-base method, the process is simple, the separation efficiency is high, and t...

Claims

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Application Information

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IPC IPC(8): C07C37/70C07C209/86C07C213/10C07C215/12C07C211/11C07C211/10C07C215/08C07B63/00
CPCC07C37/007C07C37/685C07C213/10C07C209/86C07B63/00
Inventor 熊杰明贾可嘉张田岳爱鹏江浩
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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