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O-tert-pentylphenol production process

A technology for the production process of o-tert-amylphenol, which is applied in the production process field of alkylphenols, and achieves the effects of strong selectivity, short process and low production cost

Active Publication Date: 2012-09-26
ZIBO KEWEI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of o-tert-amylphenol has no literature and patent reports at present

Method used

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  • O-tert-pentylphenol production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: 100 g of phenol and 0.12 g of aluminum powder were added to a 250 ml three-necked flask, and the mixture was stirred and reacted at 100-150° C. for 1-2 hours. After the reaction is completed, add it to the 1L reactor (I), add 300g of phenol into the reactor (I), and when the temperature rises to 130°C, feed the pre-vaporized isopentene into the reactor (I) continuously, and control the reaction temperature to 130°C After reacting at -140° C. for 3 hours, take samples for analysis, and stop the reaction when o-tert-amylphenol reaches 75% to 80% (wt). The crude alkylated liquid is hydrolyzed and flash evaporated according to the present invention to obtain refined alkylated liquid. The rectification liquid passes through the rectification separation column I, and the fraction before the boiling point of o-tert-amylphenol (former distillate), and the former distillate returns to the alkylation reaction system to continue the reaction. Continue to heat the mate...

Embodiment 2

[0017] Example 2: 100 g of phenol and 0.03 g of aluminum powder were added to a 250 ml three-neck flask. Others are the same as Example 1, and the results are shown in Table 1.

Embodiment 3

[0018] Example 3: 100 g of phenol and 0.3 g of aluminum powder were added to a 250 ml three-neck flask. Others are the same as Example 1, and the results are shown in Table 1.

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Abstract

An o-tert-pentylphenol production process adopts aluminum phenoxide as catalyst and performs alkylation of phenol and isoamylene under a certain temperature and pressure to synthesize o-tert-pentylphenol. The reaction temperature is 100-180 DEG C, the reaction time is 5.0-7.0h and the weight percent of aluminum phenoxide to phenol is 0.01%-1.0%. The catalyst has good catalytic activity, the once-through yield of the product is more than 80%, the phenol conversion rate is more than 90% and the product purity is more than 99.5%. The alkylation reaction solution is sent to a rectification systemafter catalyst deactivation and treatment; the product o-tert-pentylphenol can be obtained through refinement and separation, the residual residue can be reacted with isoamylene continuously in the present of catalyst to produce 2,4-di-tert-pentylphenol and the whole process does not generate environmental pollution. By adopting the process to produce o-tert-pentylphenol, the equipment investmentis small, the process flow is short, the material and energy consumptions are low, the production cost is low and the quality is stable, thus the process is applicable to the industrialized production.

Description

technical field [0001] The invention belongs to fine chemical industry, in particular to the production process of alkylphenol Background technique [0002] Alkylphenols are generally produced by the alkylation reaction of phenol and alkylating agents (such as olefins, ethers, alcohols, etc.) in the presence of catalysts. The production process of o-tert-amylphenol has no literature and patent reports at present. According to the principle of alkylation reaction, under certain catalyst and process conditions, react with phenol and isopentene, and by adjusting the reaction temperature, reaction pressure, raw material ratio and other conditions, a certain content of o-tert-amylphenol alkylation liquid can be obtained , High-purity products can be obtained through refining and separation. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a production process for o-tert-amylphenol, select a suitable catalyst, and sel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C39/06C07C37/14B01J31/14
CPCY02P20/52
Inventor 徐志刚丛悦鑫齐金州汪金彪
Owner ZIBO KEWEI CHEM
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