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Method for extracting p-cumylphenol from phenol tar

A technology for extracting p-cumylphenol and phenol, which is applied in the field of extracting p-cumylphenol, can solve the problems of maximization and failure to achieve the highest value, and achieve the effect of easy recovery and low loss rate

Active Publication Date: 2021-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of composition, phenol tar contains many fine chemicals, which have high application value, but the treatment of phenol tar in the market has not maximized the value, mainly by adding certain chemical substances to phenol tar. catalyst, the phenol and acetophenone are then recovered by cracking in the reactor
This process does not extract p-cumylphenol from phenol tar

Method used

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  • Method for extracting p-cumylphenol from phenol tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Set the temperature of the constant temperature bath at 295K, mix tri-n-octylamine and octylamine at a mass ratio of 80:20, control the stirring speed of the electric constant-speed stirrer to 200r / min, and stir for 12min to prepare the finished extractant. The extractant is added dropwise to the key components, the drop rate is controlled at 55 drops / minute, and then the temperature is slowly raised from room temperature to 313K. During the heating process, constant and slow stirring is required, and the temperature rise rate is 20K per minute. The stirring speed is controlled at 120 rev / min. When the temperature rises to 290K, add the solvent dropwise to the mixed liquid, and then keep the temperature at a constant temperature for 25 minutes. At this time, it is necessary to stop stirring. After 25 minutes, continue to slowly heat up and resume stirring to 313K. After the heating process is completed Start to cool down, the cooling rate is controlled at 20K per minute,...

Embodiment 2

[0027] Set the temperature of the constant temperature bath at 295K, mix tri-n-octylamine and octylamine at a mass ratio of 85:15, control the stirring speed of the electric constant-speed stirrer to 200r / min, and stir for 12min to prepare the finished extractant. The extractant is added dropwise to the key components, the drop rate is controlled at 65 drops / minute, and then the temperature is slowly raised from room temperature to 323K. During the heating process, constant and slow stirring is required, and the temperature rise rate is 30K per minute. The stirring speed is controlled at 160 rev / min. When the temperature rises to 300K, add the solvent dropwise to the mixed liquid, and then keep the temperature at a constant temperature for 35 minutes. At this time, it is necessary to stop stirring. After 35 minutes, continue to slowly heat up and resume stirring to 323K. After the heating process is over Start to cool down, the cooling rate is controlled at 30K per minute, unti...

Embodiment 3

[0035] Set the temperature of the constant temperature bath at 295K, mix tri-n-octylamine and octylamine at a mass ratio of 82:18, control the stirring speed of the electric constant-speed stirrer to 200r / min, and stir for 12min to prepare the finished extractant. The extractant is added dropwise to the key components, the dropping rate is controlled at 60 drops / M, and then the temperature is slowly raised from room temperature to 323K, the heating rate is 25K per minute, the stirring speed is controlled at 150 rpm / M, and the temperature is raised to At 295K, add 10 milliliters of tri-n-octylamine solution dropwise to the mixed liquid, and then keep the temperature at constant temperature for 30 minutes. At this time, it is necessary to stop stirring. After 30 minutes, continue to slowly heat up and resume stirring to 323K. After the heating process, start to cool down. Control the decrease of 25K per minute, until it drops to 283K, add 10 ml of tri-n-octylamine solution dropwi...

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Abstract

A method for extracting p-cumylphenol in phenol tar, comprising the steps: (1) phenol tar is subjected to vacuum distillation to obtain key components; the key components are p-cumylphenol, acetophenone, (2) The solvent is added dropwise to the key components, the drop rate is controlled at 55 drops to 65 drops / min, and then the temperature is slowly raised from room temperature to 313K to 323K, and the temperature rises During the process, uniform and slow stirring is required, and the solvent is composed of tri-n-octylamine and octylamine; the mass ratio of tri-n-octylamine to octylamine is: tri-n-octylamine:octylamine=80~85:20~15 The use of this extractant solves the current situation that the purity of p-cumylphenol extracted from phenol tar is not high. At the same time, the mixture of tri-n-octylamine and octylamine also has the advantages of low loss rate and easy recovery as the extractant.

Description

technical field [0001] The invention relates to a method for extracting p-cumylphenol from phenol tar. Background technique [0002] Phenol tar is a by-product of phenol-acetone plant. The composition of phenol tar is as follows: p-cumylphenol 44%, heavy component 25%, acetophenone 14%, α-methylstyrene dimer 9%, phenol 4%, Dimethylbenzyl alcohol 4%. From the perspective of composition, phenol tar contains many fine chemicals, which have high application value, but the treatment of phenol tar in the market has not maximized the value, mainly by adding certain catalyst, and then recover the phenol and acetophenone in it by cracking in the reactor. This process does not extract p-cumylphenol from phenol tar. [0003] P-cumylphenol is an important organic chemical raw material and intermediate, which can be used as epoxy resin, polycarbonate molecular weight regulator, end-capping agent, etc., as a modifier of phenolic resin and epoxy resin, as a plastic, Antioxidants for lu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/74C07C37/84C07C39/15
CPCC07C37/74C07C37/84C07C39/15
Inventor 方键金冬梅王旭韩小平程延华金允子金辉马杰
Owner PETROCHINA CO LTD
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