Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for preparing 2,4-dicumyl phenol

A technology of cumyl phenol and phenol, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of low selectivity and complex post-processing

Active Publication Date: 2006-12-27
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problems such as low selectivity of 2,4-dicumylphenol and complicated post-reaction treatment in the prior art, and a new preparation method of 2,4-dicumylphenol is provided

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for preparing 2,4-dicumyl phenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 188.2 grams (2 moles) of molten phenol and 0.52 grams of metal aluminum powder into a 1-liter four-necked flask equipped with mechanical stirring, thermometer, condenser and addition funnel, and raise the temperature to 180 ° C under the protection of nitrogen gas, until the aluminum powder is completely dissolved After that, it takes about 2 hours. The temperature was lowered to 75°C, 9.4 g of dry Amberlyst 31H was added, and the reaction was continued at this temperature for 2 hours. Heat up to 90°C, add 472.8 grams (4 moles) of α-methylstyrene dropwise, and the reaction time is about 4 hours. The phenol conversion rate is 100% according to chromatographic analysis, and the alkylation product is composed of: 2-cumylphenol 2.1% , 4-cumylphenol 8.4%, 2,4-dicumylphenol 78.3%, 2,4,6-tricumylphenol 7.5%. The reaction liquid was subjected to high vacuum distillation at 100 Pa, and the main fraction at 185-190°C / 100 Pa was collected. The main fraction and the residue w...

Embodiment 2

[0020] Add 188.2 grams (2 moles) of molten phenol and 0.52 grams of metal aluminum powder to a 1-liter four-neck flask equipped with mechanical stirring, thermometer, condenser and addition funnel, and raise the temperature to 175°C under the protection of nitrogen gas, until the aluminum powder is completely dissolved After that, it takes about 3 hours. The temperature was lowered to 80°C, 15.0 g of dry Amberlyst 15H was added, and the reaction was continued at this temperature for 3 hours. The temperature was raised to 100°C, 472.8 grams (4 moles) of α-methylstyrene was added dropwise, the reaction time was about 4 hours, and the phenol conversion rate was 100% according to chromatographic analysis, and the alkylation product was composed of: 2-cumylphenol 3.2% , 4-cumylphenol 6.9%, 2,4-dicumylphenol 77.6%, 2,4,6-tricumylphenol 8.6%. The reaction solution was subjected to high vacuum distillation at 80 Pa, and the main fraction at 185-190°C / 100 Pa was collected. The main f...

Embodiment 3

[0022] Same as Example 1, except that 9.4 grams of DC 102 is used instead of amberlyst 31H. Chromatographic analysis of the alkylation product consists of: 2-cumylphenol 2.1%, 4-cumylphenol 8.4%, 2,4-dicumylphenol 75.6%, 2,4,6-tricumylphenol 9.5%; melting point They are 65.1°C and 139.2°C respectively, and the mass fractions of the products are 97.1% and 97.3% respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparing method of 2,4-cumidic base phenol, which is characterized by the following: adopting phenol and alpha-methylstyrene as raw material at 1:2-4 molar rate and complex compound (Resin) x-Al (O-Ph) y as catalyst; utilizing the weight of catalyst at 1-15% in the phenol weight; reacting at 70-130 deg.c for 2-7 h.

Description

technical field [0001] The invention relates to a preparation method of 2,4-dicumylphenol. Background technique [0002] Phenol and its aromatic hydrocarbon alkylation products have attracted the attention of researchers due to their wide range of uses. α-Methylstyrene is a by-product of the synthesis of phenol and acetone by the cumene method. It is used as the starting material to carry out the alkylation reaction of phenol, and the alkylation products of various structures can be obtained, such as 2-cumyl Phenol (2-cumylphenol), 4-cumylphenol (4-cumylphenol), 2,4-dicumylphenol (2,4-dicumylphenol), 2,6-dicumylphenol (2,6-dicumylphenol), 2,4,6-tricumylphenol (2,4,6-tricumylphenol) and the like. Among them, 4-cumylphenol, 2,4-dicumylphenol and 2,4,6-tricumylphenol are most widely used. In addition, while the alkylation reaction occurs, dimers (2,4-diphenyl-4-methylpentene), trimers and intramolecular cyclization products of α-methylstyrene a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/12C07C37/14
Inventor 沈之芹王芳李斌
Owner CHINA PETROLEUM & CHEM CORP