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Preparation method of bisphenol Z and bisphenol Z

A technology of phenol and cyclohexanone, which is applied in the field of bisphenol Z and the preparation of raw material bisphenol Z, can solve the problems of cumbersome process, adding a lot of water for cleaning, and increasing product cost, so as to achieve simple operation process, reduce the existence of salt, The effect of reducing investment costs

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the above preparation method is that corrosive hydrogen chloride or concentrated hydrochloric acid is used as a catalyst, which requires relatively high production equipment, and in the subsequent treatment process, a large amount of water needs to be added for cleaning, resulting in a large amount of waste water
In addition, adding lye to neutralize and remove acid will produce salt. Salt ions are unfavorable for subsequent applications. Therefore, desalination treatment is necessary, and the process is cumbersome. This will inevitably increase investment in equipment and three waste treatment, and eventually increase product costs. , not conducive to large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 84.7g (0.9mol) of phenol, 29.5g (0.3mol) of cyclohexanone, 3g of catalyst Amberlyst 15 ion exchange resin, and toluene into a glass reaction flask equipped with a thermometer, a stirring device, a water separator, and a condensation reflux device. 100ml, heated to reflux (110°C), and continued heating for 6 hours. After the reaction was completed, it was cooled to room temperature and filtered. The filtered filtrate was distilled under reduced pressure to remove toluene and phenol. The crude product was recrystallized in ethanol to obtain 74.2 g of the final product with a yield of 88%. The melting point of the product was 190°C to 192°C.

Embodiment 2

[0047] 56.5g (0.6mol) of phenol, 29.5g (0.3mol) of cyclohexanone, 3g of catalyst Amberlyst 15 ion exchange resin, and 100ml of toluene were respectively added to a glass reaction bottle equipped with a thermometer and a stirring device, and the mixture was continuously stirred at room temperature for 8 hours. After the reaction was completed, the filtered filtrate was distilled under reduced pressure to remove toluene and phenol, and the crude product was recrystallized in ethanol to obtain 70.9 g of the final product with a yield of 92% and a melting point of 190°C to 192°C.

Embodiment 3

[0049]Add 56.5g (0.6mol) of phenol, 29.5g (0.3mol) of cyclohexanone, 3g of catalyst Amberlyst 15 ion exchange resin, and xylene respectively 100ml, heated to 80°C for 4 hours. After the reaction was completed, it was lowered to room temperature, filtered, and the filtered filtrate was distilled under reduced pressure to remove xylene and phenol, and the crude product was recrystallized in ethyl acetate to obtain 64.4 g of the final product with a yield of 80%. The melting point of the product was 190° C. to 192 ℃.

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Abstract

The invention discloses a preparation method of bisphenol Z and bisphenol Z. The preparation method comprises the following steps: by taking phenol and cyclohexanone as raw materials and solid acid as a catalyst, carrying out catalytic dehydration reaction, filtering, distilling and recrystallizing to obtain bisphenol Z; the solid acid is ion exchange resin or a molecular sieve. According to the method, a corrosive liquid acid catalyst is not used in the reaction process, and the operation process is simple, so that the requirement on production equipment is not too high. Most importantly, a large amount of water is not needed for cleaning after the reaction, so that the generation of wastewater is greatly reduced, alkali neutralization is not needed, the existence of salt is reduced, and the product quality is improved. In addition, compared with a liquid acid catalyst, the solid acid catalyst can be repeatedly used, so that the investment cost of the catalyst is reduced.

Description

technical field [0001] The invention relates to the technical field of polycarbonate, and more specifically, relates to a preparation method of bisphenol Z as a raw material for preparing polycarbonate and bisphenol Z. Background technique [0002] As a functional material, polycarbonate has excellent impact resistance and strength, and its excellent light transmission makes it widely used. Bisphenol Z is an important type of polycarbonate monomer. Since the cyclohexane group is introduced into the molecular chain, not only the bisphenol Z polycarbonate has good photoelectric properties, but also its mechanical strength is improved. The wear resistance and scratch resistance of the surface are improved, which can effectively prolong the service life of the material. As an important functional monomer for polycarbonate modification, bisphenol Z is increasingly favored, and its preparation technology has far-reaching significance for the manufacture, application and developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/20C07C39/17
CPCC07C37/20C07C39/17
Inventor 曾佳贺黎明杜超王瑞璞
Owner CHINA PETROLEUM & CHEM CORP
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