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Preparation method of ultraviolet light absorber UV-360

A UV-360 and absorber technology, applied in the direction of organic chemistry, can solve the problems of increased manufacturing costs, waste of water resources, aggravated industrial wastewater pollution, etc., and achieve the effect of low solvent usage and low manufacturing costs

Pending Publication Date: 2022-02-01
上海雄启化学科技有限公司
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Problems solved by technology

[0003] Wherein the ultraviolet absorber UV-360 is mainly used in the plastic manufacturing industry such as polystyrene, ABS resin, nylon, yet its waste of water resource is more serious in the preparation process of existing ultraviolet absorber UV-360, thereby increases the weight of industrial waste water pollution, lead to an increase in its manufacturing cost

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  • Preparation method of ultraviolet light absorber UV-360

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Embodiment Construction

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of ill...

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Abstract

The invention discloses a preparation method of an ultraviolet light absorber UV-360. The preparation method comprises the following specific steps: subjecting hydrochloric acid, o-nitroaniline and sodium nitrite to reacting to obtain a diazonium solution; stirring and dissolving water, petroleum ether, nekal and p-tert-octylphenol, adding the diazonium solution, carrying out a coupling reaction, and performing spin-drying to obtain an o-nitroazo compound; carrying out alkalization reaction on water, caustic soda liquid, methanol, glucose, hydrazine hydrate, caustic soda flakes, aluminum powder, toluene and a conjugate, and reserving a toluene layer; subjecting water, hydrochloric acid, zinc powder and the toluene layer to an acidic reaction, and reserving the toluene layer; carrying out decoloration reaction on the toluene layer, activated carbon and carclazyte, conducting filtering, and carrying out a reaction with methanol to obtain UV-329; carrying out condensation reaction on di-n-propylamine, paraformaldehyde, trimethylbenzene and UV-329, and adding methanol for crystallization to obtain a crude UV-360 product; and subjecting the crude UV-360 product to reacting with trimethylbenzene, performing filtering, and carrying out a reaction with methanol to obtain a finished UV-360 product. According to the preparation method, industrial wastewater, washing wastewater and a filtering solvent generated in the preparation process are distilled and reused, so the characteristics of zero discharge of the industrial wastewater and low use amount of the solvent are realized.

Description

technical field [0001] The invention relates to the technical field of ultraviolet absorbers, in particular to a preparation method of ultraviolet absorber UV-360. Background technique [0002] UV absorber is a light stabilizer that can absorb the ultraviolet portion of sunlight and fluorescent light sources. It has super ultraviolet absorption capacity, non-flammable, non-corrosive, good storage stability and so on. [0003] Wherein the ultraviolet absorber UV-360 is mainly used in the plastic manufacturing industry such as polystyrene, ABS resin, nylon, yet its waste of water resource is more serious in the preparation process of existing ultraviolet absorber UV-360, thereby increases the weight of industrial waste water pollution, lead to an increase in its production cost. Contents of the invention [0004] The embodiment of the present application provides a preparation method of the ultraviolet absorber UV-360, which prevents the industrial waste water, washing was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D249/20
CPCC07D249/20
Inventor 田良雄田上
Owner 上海雄启化学科技有限公司
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