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Preparation method and application of antioxidant 2,4-p-bromobenzyl benzophenone

A technology of bromobenzyl benzophenone and antioxidant, which is applied in the field of antioxidant preparation, can solve the problems of complex preparation process of antioxidant, equipment corrosion, environmental pollution, etc. Effect

Active Publication Date: 2014-09-17
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex preparation process of antioxidants, serious corrosion of equipment, and environmental pollution in the process of product post-processing, new technologies are needed to improve the deficiencies of existing technologies.
At the same time, the stability of antioxidants needs to be further improved in practical applications, especially in the production of stone paper, which will cause yellowing after a long time. The most important thing to solve is: there is compatibility with the raw materials for stone paper production The problem

Method used

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  • Preparation method and application of antioxidant 2,4-p-bromobenzyl benzophenone
  • Preparation method and application of antioxidant 2,4-p-bromobenzyl benzophenone
  • Preparation method and application of antioxidant 2,4-p-bromobenzyl benzophenone

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Effect test

Embodiment 1

[0025] One, coated antioxidant 2,4-p-bromobenzyl benzophenone, prepared through the following steps:

[0026] (a).Chemical components: 50 parts of 2,4 dihydroxybenzophenone, 100 parts of p-bromobenzyl bromide, 5 parts of solid alkali carrier dilute metal element catalyst, KCO 3 20 parts, 0.1 part of cerium trichloride, 1 part of benzyltriethylammonium chloride;

[0027] (b). 2,4 dihydroxy benzophenone, p-bromobenzyl bromide, solid alkali carrier dilute metal element catalyst, KCO 3 , cerium trichloride, and benzyltriethylammonium chloride were placed in a four-necked flask, fed with nitrogen, and reacted at reflux at 100°C for 6 hours, filtered the solid matter while it was hot, and then separated the reacted aqueous phase and organic phase Separate, then extract the organic phase with 100 parts of 0.1% sodium chloride aqueous solution, extract 3 times, and then extract the organic phase with 100 parts of distilled water, distill under reduced pressure, and then cool to obtai...

Embodiment 2

[0035] One, coated stone paper antioxidant 2,4-p-bromobenzyl benzophenone, prepared by the following steps:

[0036] (a). Chemical components: 80 parts of 2,4 dihydroxybenzophenone, 160 parts of p-bromobenzyl bromide, 10 parts of solid base carrier dilute metal element catalyst, KCO 3 30 parts, 0.3 parts of cerium trichloride, 1.5 parts of benzyltriethylammonium chloride;

[0037] (b). 2,4 dihydroxy benzophenone, p-bromobenzyl bromide, solid alkali carrier dilute metal element catalyst, KCO 3 , cerium trichloride, and benzyltriethylammonium chloride were placed in a four-necked flask, fed with nitrogen, and reacted at reflux for 3 hours at 115°C, filtered the solid matter while it was hot, and then separated the aqueous phase and the organic phase after the reaction , then use 100 parts of 0.1% sodium chloride aqueous solution to extract the organic phase, extract 3 times, and then use 100 parts of distilled water to extract the organic phase, then distill under reduced press...

Embodiment 3

[0045] One, coated antioxidant 2,4-p-bromobenzyl benzophenone, prepared through the following steps:

[0046] (a). Chemical components: 65 parts of 2,4 dihydroxybenzophenone, 130 parts of p-bromobenzyl bromide, 7.5 parts of solid alkali carrier dilute metal element catalyst, KCO 3 25 parts, 0.2 parts of cerium trichloride, 2 parts of benzyltriethylammonium chloride;

[0047] (b). 2,4 dihydroxy benzophenone, p-bromobenzyl bromide, solid alkali carrier dilute metal element catalyst, KCO 3 , cerium trichloride, and benzyltriethylammonium chloride were placed in a four-necked flask, fed with nitrogen, and reacted at reflux at 115°C for 4.5 hours, filtered the solid matter while it was hot, and then separated the aqueous phase and the organic phase after the reaction , then use 100 parts of 0.1% sodium chloride aqueous solution to extract the organic phase, extract 3 times, and then use 100 parts of distilled water to extract the organic phase, then distill under reduced pressure,...

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Abstract

The invention discloses a preparation method of coating type antioxidant 2,4-p-bromobenzyl benzophenone. The preparation method comprises the following steps: mixing 2,4-dihydroxy benzophenone, p-bromobenzyl bromide, a solid alkali carrier rare metal element catalyst, potassium carbonate, cerous chloride and benzyl triethyl ammonium chloride; carrying out reflux reaction at a nitrogen atmosphere and 100-125 DEG C for 3-6 hours; filtering solid substances while hot, and then separating reacted water phase and organic phase; then extracting the organic phase by using 0.1% by weight of sodium chloride water solutions; then extracting by using water, and carrying out reduced pressure distillation to obtain the coating type antioxidant 2,4-p-bromobenzyl benzophenone. The coating type 2,4-p-bromobenzyl benzophenone antioxidant can be used for enhancing the stability of an antioxidant by virtue of the shielding effect of two benzene rings by adopting the solid alkali carrier rare metal element catalyst; the reacted product achieves the easiness for purification treatment without corroding equipment; the coating type 2,4-p-bromobenzyl benzophenone antioxidant as an antioxidant used for producing stone paper is outstanding in effect.

Description

technical field [0001] The invention relates to an antioxidant preparation technology and the application of the antioxidant in stone paper. Background technique [0002] Science and technology have entered a new era, and new materials with high-tech added value are constantly coming out. The synthesis of new materials requires new technologies and new processes. The application of catalysts has become one of the core technologies of today's science. Solid alkali is a new type of catalyst. , because of its high activity, high selectivity, mild chemical reaction conditions, easy separation of the reaction system, no corrosion of equipment, environmental friendliness, and reusable advantages, it has been paid more and more attention, especially in fine chemical synthesis and polymer synthesis. Many chemical synthesis reactions with harsh reaction conditions can be carried out, and the synthesis reaction process is continuous, which reduces energy consumption and environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/84C07C45/64B01J23/60D21H17/11D21H21/38
CPCC07C45/64C07C49/84
Inventor 施晓旦郭和森
Owner SHANGHAI DONGSHENG NEW MATERIALS
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