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Method for preparing dodecylphenol

A technology of dodecyl phenol and phenol is applied in the field of preparation of dodecyl phenol and organic compounds, which can solve the problems of low purity of alkyl phenol products, poor anti-oxidative stability, long reaction time, etc., and achieves improved utilization. Value, long service life, light effect of product color

Inactive Publication Date: 2010-03-31
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current method of preparing dodecylphenol, unfavorable factors such as high cost, low yield, long reaction time and large environmental pollution restrict the development, and alkylphenol products have quality problems such as low purity, dark color, and poor oxidation stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a three-necked flask reactor with an electric stirring device and a vacuum treatment device, in 45mL of petroleum ether (petroleum ether with a boiling range of 90-120°C), the amount of solvent used is 2.5 times the liquid volume of phenol, 0.2mol of phenol, 1.0mL of relative Boron trifluoride ether solution catalyst with a density of 1.12-1.14 is put into a three-necked flask, and the catalyst dosage is 12% of the mass of phenol. The molar ratio of polyisobutene is 2:1. After stirring and reacting for 2 hours at the reaction temperature of 20°C, the reaction mixture is suction-filtered while it is hot, and the filtrate is washed with hot water 5 times while it is hot to remove waste water. The crude product was distilled under reduced pressure, and the distillate product was obtained at a vacuum degree of 1.3 mb and a temperature of 150 ° C. Finally, under the protection of nitrogen, the reaction mixture was filtered while hot, and the filtrate was washed with hot wa...

Embodiment 2

[0022] The preparation method is the same as in Example 1, except that 0.2 mol of phenol and 3 g of cation exchange resin Amberlyst 15 catalyst are used instead of the corresponding raw materials in Example 1, the amount of catalyst used is 15% of the mass of phenol, the reaction environment is vacuum treated, and the reaction environment is vacuum-processed at a temperature of 50 ° C. After fully stirring and mixing evenly, add a total amount of 0.1mol trimeric isobutylene dropwise under continuous stirring, the molar ratio of phenol to trimeric isobutylene is 2:1, and at a reaction temperature of 50°C, stir and react for 6 hours, and then dissolve the reaction mixture while it is hot. Carry out suction filtration, product aftertreatment is with example 1.

Embodiment 3

[0024] The preparation method is the same as in Example 1, except that 0.2 mol of phenol and 3 g of strongly acidic aluminum silicate pellet molecular sieve catalyst are used instead of the corresponding raw materials in Example 1, the amount of catalyst used is 15% of the mass of phenol, the reaction environment is vacuum treated, and the reaction environment is vacuum-treated at 90° C. After fully stirring and mixing evenly at high temperature, add dropwise a total of 0.1 mol of trimeric isobutylene under continuous stirring, the molar ratio of phenol to trimeric isobutylene is 2:1, and at a reaction temperature of 90°C, after stirring for 10 hours, The reaction mixture was suction filtered while hot. Product post-processing is the same as Example 1.

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Abstract

The invention relates to a method for preparing dodecylphenol, which uses phenol and triisobutene as raw materials to carry out an alkylation reaction by catalysis of a catalyst in petroleum ether solvent (indicating that when Lewis acid catalyst is used). The reacting temperature is between 20 and 90 DEG C, and the reacting time is between 2 and 10 hours; the dodecylphenol is prepared under a condition that the proportion of the phenol to the triisobutene is 2.0-10.0:1 in molar ratio. The method has the advantages that the product has the characteristics of high purity, good quality, high reaction yield, long service life of the catalyst and the like; and the preparation method can be applied in the production process of current dodecylphenol.

Description

technical field [0001] The invention belongs to the field of fine chemical industry and relates to a method for preparing organic compounds, in particular to preparing dodecylphenol by using an acidic catalyst to catalyze the alkylation reaction of phenol and trimerized isobutylene. Background technique [0002] Alkylphenols are produced by the alkylation reaction of olefins, aliphatic alcohols or halogenated hydrocarbons with phenol. The important alkylphenols in industrial production are obtained through the alkylation reaction of phenols and olefins. Alkylphenol is not only an important intermediate for the production of anionic surfactants such as alkylphenol polyoxyethylene ether nonionic surfactants and alkylphenol polyoxyethylene ether sulfates and phosphates, but also an important intermediate for the production of fungicides and plasticizers. , stabilizers and other chemical intermediates. [0003] Dodecylphenol is one of the important raw materials for the prepara...

Claims

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Application Information

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IPC IPC(8): C07C39/06C07C37/11
Inventor 商育伟李树新郭文莉伍一波李绍冉
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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