Method for extracting paracumyl phenol 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: 2017-10-27
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 paracumyl phenol from phenol tar

Examples

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Comparison scheme
Effect test

Embodiment 1

[0019] The temperature of the constant temperature bath was set to 295K, tri-n-octylamine and octylamine were mixed according to the mass ratio of 80:20, the stirring speed of the electric constant speed stirrer was controlled to be 200r / min, and the stirring time was 12min to obtain the finished extractant. The extractant was added to the key components by dropwise addition, and the rate of addition was controlled at 55 drops / min, and then the temperature was slowly raised to 313K from room temperature. In the process of heating, it was necessary to stir slowly at a uniform speed, and the heating rate was 20K per minute. The stirring speed was controlled at 120 r / min. When the temperature was raised to 290K, the solvent was added dropwise to the mixed liquid, and then the temperature was maintained at a constant temperature for 25 minutes. At this time, it was necessary to stop stirring. After 25 minutes, continue to slowly heat up and resume stirring to 313K. Start to cool do...

Embodiment 2

[0027] The temperature of the constant temperature bath was set to 295K, tri-n-octylamine and octylamine were mixed according to the mass ratio of 85:15, the stirring speed of the electric constant speed stirrer was controlled to be 200r / min, and the stirring time was 12min to obtain the finished extractant. The extractant was added to the key components by dropwise addition, and the rate of addition was controlled at 65 drops / min, and then the temperature was slowly raised to 323K from room temperature. In the process of heating, it was necessary to stir slowly at a constant speed, and the heating rate was 30K per minute. The stirring speed is controlled at 160 r / min, and the solvent is added dropwise to the mixed liquid when the temperature is raised to 300K, and the temperature is maintained at a constant temperature for 35 minutes. At this time, the stirring needs to be stopped. After 35 minutes, continue to slowly heat up and resume stirring to 323K. Start to cool down, th...

Embodiment 3

[0035] The temperature of the constant temperature bath was set to 295K, tri-n-octylamine and octylamine were mixed according to the mass ratio of 82:18, the stirring speed of the electric constant speed stirrer was controlled to be 200r / min, and the stirring time was 12min to obtain the finished extractant. The extractant was added to the key components by dropwise addition, and the rate of addition was controlled at 60 drops / M, and then the temperature was slowly raised to 323K from room temperature. Add 10 ml of tri-n-octylamine solution dropwise to the mixed liquid at 295K, then keep the temperature at a constant temperature for 30 minutes, stop stirring at this time, continue to slowly heat up and resume stirring to 323K after 30 minutes, start cooling after the heating process, and the cooling rate Control the decrease of 25K per minute, until it drops to 283K, add 10 ml of tri-n-octylamine solution dropwise again, stand still for 20 minutes, and stir again for 10 minutes...

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Abstract

The invention provides a method for extracting paracumyl phenol from phenol tar. The method comprises the following steps: (1) the phenol tar is subjected to reduced pressure distillation to obtain key components, wherein the key components are the paracumyl phenol, acetophenone, an alpha-methylstyrene bipolymer and phenol; and (2) solvents are added dropwise to the key components, wherein the dropping speed is controlled in the range from 55 drops / minute to 65 drops / minute, then the temperature is slowly raised from room temperature to 313K-323K, and stirring is slowly conducted at a constant speed in the temperature-raising process, wherein the solvents are composed of tri-n-octylamine and octylamine, and the mass ratio of the tri-n-octylamine to the octylamine is (80-85):(20-15). The method solves the current situation that the purity of paracumyl phenol extracted from the phenol tar is not high by using an extractant provided in the invention, and meanwhile, the mixture of the trioctylamine and the octylamine as the extractant has the advantages of low loss ratio and easy recovery.

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 the phenol-acetone plant. The composition of phenol tar is approximately as follows: p-cumylphenol 44%, heavy components 25%, acetophenone 14%, α-methylstyrene dimer 9%, phenol 4%, Dimethylbenzyl alcohol 4%. In terms of composition, phenol tar contains many fine chemicals, and these fine chemicals have high application value, but the treatment of phenol tar on the market has not maximized the value, mainly by adding certain A catalyst, and then the phenol and acetophenone are recovered by cracking in the reactor. This process does not extract p-cumylphenol from the phenol tar. [0003] P-cumylphenol is an important organic chemical raw material and intermediate, which can be used in epoxy resin, polycarbonate molecular weight regulator, end capping agent, etc., as modifier of phenolic resin and epoxy resin, as p...

Claims

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Application Information

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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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