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Method for continuously preparing bisphenol F resin and bisphenol F resin

A resin and bisphenol technology, which is applied in the field of polymer materials, can solve the problems that bisphenol F resin is easily oxidized at high temperature, high purity of bisphenol F resin, and high energy consumption for dephenolization, and achieves reduction of production cost, simple operation and high preparation. The effect of low energy consumption

Pending Publication Date: 2022-05-27
杭摩新材料(嘉兴)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of high dephenolization energy consumption and the high-temperature oxidation of bisphenol F resin in the traditional synthesis method, and provides a method for continuously preparing bisphenol F resin and bisphenol F resin, which can be processed at a lower temperature Realize the synthesis of bisphenol F resin and its separation from phenol, low energy consumption and high purity of the prepared bisphenol F resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) the phenol 500kg of preheating and melting is added to the high-level metering tank with a special pump, and is metered into the reaction kettle of 10 cubic meters, then adds 5kg oxalic acid and 5000kg toluene, stirs;

[0030] (2) after being warming up to 40 ℃, start to drip 90kg 37% aqueous formaldehyde solution, drip time 90 minutes, 40 ℃ of constant temperature reaction 6 hours after dripping finishes;

[0031] (3) reduce the vacuum degree in the reactor to -0.093MPa, and adopt the oil-water separator to evaporate and separate the water;

[0032] (4) reduce the temperature of the material in the reaction kettle to 40°C, and stir for 3 hours to separate out the bisphenol F resin powder particles in the reaction system; stop stirring, let stand for 30 minutes, and release the bisphenol F resin powder particles from the bottom valve of the reaction kettle, And filter, the recovery liquid is added to the reaction kettle again, and the separated bisphenol F resin pow...

Embodiment 2

[0036] (1) 500kg of preheated and molten phenol is added to the high-level metering tank with a special pump, and is metered into the reaction kettle of 10 cubic meters, then adds 10kg phosphoric acid and 3000kg toluene, and stirs uniformly;

[0037] (2) after being warming up to 50 ℃, start to drip 90kg 44% aqueous formaldehyde solution, drip time 90 minutes, 50 ℃ of constant temperature reaction 3 hours after dripping finishes;

[0038] (3) reduce the vacuum degree in the reaction kettle to -0.088MPa, and adopt the oil-water separator to evaporate and separate the water;

[0039] (4) reduce the temperature of the material in the reaction kettle to 50°C, and stir for 3 hours to separate out the bisphenol F resin powder particles in the reaction system; stop stirring, let stand for 30 minutes, and release the bisphenol F resin powder particles from the bottom valve of the reaction kettle, And filter, the recovery liquid is added to the reaction kettle again, and the separated ...

Embodiment 3

[0043] (1) 500kg of preheated and molten phenol is added to the high-level metering tank with a special pump, and is metered into the reaction kettle of 10 cubic meters, then adds 2kg p-toluenesulfonic acid and 5000kg toluene, stirs;

[0044] (2) after being warming up to 60 ℃, start to drip 120kg 37% aqueous formaldehyde solution, drip time 180 minutes, 60 ℃ of constant temperature reaction 3 hours after dripping finishes;

[0045] (3) reduce the vacuum degree in the reactor to -0.081MPa, and adopt the oil-water separator to evaporate and separate the water;

[0046] (4) reduce the temperature of the material in the reaction kettle to 60 ° C, and stir for 3 hours to separate out the bisphenol F resin powder particles in the reaction system; stop stirring, let stand for 30 min, and release the bisphenol F resin powder particles from the bottom valve of the reaction kettle, And filter, the recovery liquid is added to the reaction kettle again, and the separated bisphenol F resi...

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Abstract

The invention discloses a method for continuously preparing bisphenol F resin and the bisphenol F resin. The method comprises the following steps: step 1, mixing molten phenol, an acid catalyst and methylbenzene in a reaction container; step 2, heating the materials in the reaction container to 40-80 DEG C, adding a formaldehyde aqueous solution into the reaction container at a preset speed, and reacting at constant temperature for 3-6 hours, in the reaction process, the molar ratio of phenol to formaldehyde is not less than 2; step 3, reducing the vacuum degree in the reaction container to be less than 1MPa so as to remove moisture; 4, reducing the temperature of the materials in the reaction container to 40-50 DEG C, and separating the separated bisphenol F resin out of the reaction container; and 5, supplementing phenol and an acid catalyst into the reaction container, and repeating the steps 2-4. Compared with the prior art, the method has the advantages that the energy consumption in the process of synthesizing the bisphenol F resin can be effectively reduced, and the high-purity bisphenol F resin can be obtained.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for continuously preparing bisphenol F resin and bisphenol F resin. Background technique [0002] Bisphenol F (BPF) is a class of bisphenol compounds formed by the condensation of phenol and formaldehyde under the action of an acid catalyst. Its molecular structure contains a large number of phenolic hydroxyl groups and benzene rings. It has good application prospects in resins, carbon polymer resins and as phenolic plastic modifiers. [0003] In the process of synthesizing bisphenol F in the existing method, in order to obtain high-purity bisphenol F resin, the mol ratio of phenol and formaldehyde is required to be greater than 5, but this can cause a large amount of phenol to remain after the reaction is completed, and high-temperature distillation is usually used to remove it. However, this process requires a lot of energy consumption, and high temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
CPCC08G8/10Y02P20/10
Inventor 陈利徐利彬王松松孟付良陈建国周大鹏
Owner 杭摩新材料(嘉兴)有限公司
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