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Synthesis method of bisphenol F in salt bath system

A synthesis method and system technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of great harm to human body, environmental pollution, etc., and achieve low environmental pollution, simple preparation method and high yield Effect

Inactive Publication Date: 2013-09-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this reaction is carried out in an organic solvent, which pollutes the environment and is very harmful to the human body.

Method used

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  • Synthesis method of bisphenol F in salt bath system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take the formaldehyde 8.12g that mass concentration is 37% in the raw material as example, the method for synthesizing bisphenol F under the salt bath system is by following steps:

[0024] (1) Ingredients

[0025] Weigh 8.12g of formaldehyde with a mass concentration of 37%, 127.05g of phenol, 10.85g of hydrochloric acid with a mass concentration of 37%, and 27.63g of potassium oxalate, and mix them in a 250mL three-necked flask. The molar ratio of formaldehyde to phenol, catalyst, and salt is 1 :13.5:1.1:1.5, stir evenly.

[0026] (2) Reaction

[0027] The mixture in step (1) was reacted at 40° C. for 19 hours under stirring in a constant temperature circulator.

[0028] (3) dry

[0029] Put the reaction solution in a separatory funnel, let it stand for 12 hours to separate the water phase and the oil phase, take the oil phase and put it in a vacuum drying oven at -0.6MPa, and dry it at 85°C for 2.5 hours to prepare crude bisphenol F.

[0030] (4) Recrystallizatio...

Embodiment 2

[0053] Take the formaldehyde 8.12g that mass concentration is 37% in the raw material as example, the method for synthesizing bisphenol F under the salt bath system is by following steps:

[0054] (1) Ingredients

[0055] Weigh 8.12g of formaldehyde with a mass concentration of 37%, 94.11g of phenol, 7.89g of hydrochloric acid with a mass concentration of 37%, and 18.42g of potassium oxalate, and mix them in a 250mL three-necked flask. The molar ratio of formaldehyde to phenol, catalyst, and salt is 1.0 :10.0:0.8:1.0, stir evenly.

[0056] Other steps are the same as in Example 1.

Embodiment 3

[0058] Take the formaldehyde 8.12g that mass concentration is 37% in the raw material as example, the method for synthesizing bisphenol F under the salt bath system is by following steps:

[0059] (1) Ingredients

[0060] Weigh 8.12g of formaldehyde with a mass concentration of 37%, 160.00g of phenol, 13.81g of hydrochloric acid with a mass concentration of 37%, and 36.85g of potassium oxalate, and mix them in a 250mL three-necked flask. The molar ratio of formaldehyde to phenol, catalyst, and salt is 1.0 :17.0:1.4:2.0, stir evenly.

[0061] Other steps are the same as in Example 1.

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Abstract

The invention relates to a synthesis method of bisphenol F in a salt bath system. The bisphenol F, which is relatively high in yield, high in content of 4,4-dihydroxy diphenyl methane and good in selectivity, is prepared from a reaction of phenol and formaldehyde under a salt bath system and a catalyst through regulating and controlling technological parameters. And the preparation method is simple, and the synthesis process is free from an organic solvent, thus being light in environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of resin synthesis, and in particular relates to a method for synthesizing bisphenol F in a salt bath system. Background technique [0002] Bisphenol F (BPF) is a type of bisphenol compound formed by condensation of phenol and formaldehyde under the action of an acidic catalyst. In addition to generating 4,4-dihydroxydiphenylmethane, isomers or polymers such as 2,4- or 2,2-dihydroxydiphenylmethane are also generated during the synthesis process. Among them, 4,4-dihydroxydiphenylmethane has the best performance, but so far there is no report on the synthesis method of 4,4-dihydroxydiphenylmethane alone. [0003] As a basic chemical raw material, bisphenol F is mainly used in the following aspects: (1) Synthesis of bisphenol F epoxy resin, bisphenol F epoxy resin synthesized from bisphenol F is a new type of epoxy resin developed in recent years Excellent chemical product. The production of bisphenol F epox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/16C07C37/20C07C37/84
Inventor 刘春玲董文生冯卓星
Owner SHAANXI NORMAL UNIV
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