CN-224207441-U - Nitrogen pulse equipment for producing ultraviolet absorbent UV-571

CN224207441UCN 224207441 UCN224207441 UCN 224207441UCN-224207441-U

Abstract

The utility model relates to nitrogen pulse equipment for producing an ultraviolet absorbent UV-571, and belongs to the technical field of chemical refining equipment. The equipment comprises a crystallization kettle, a seed crystal incubator, a seed crystal pretreatment bladder, a seed crystal feeding device and nitrogen pulse equipment. The seed crystal incubator is welded to the side wall of the crystallization kettle, the inside of the incubator is provided with a flowing pore canal comprising a bending pore canal, the seed crystal pretreatment bladder is communicated with the incubator through a conveying pipe, and the nitrogen pulse equipment blows the seed crystal into the incubator in a pulse mode. The equipment sends UV-P seed crystal into the incubator in batches through pulse nitrogen, mixes with the raw material liquid with slow flow speed and induces crystallization, and the generated stable crystal enters the crystallization kettle to promote integral crystallization. The method effectively solves the problems of poor crystal morphology, less precipitation and difficult filtration existing in the traditional direct cooling method, and achieves the purposes of improving the production efficiency and the product quality.

Inventors

Kou Zongxiao
HAN LIQIANG
WEN YINJUAN
LI JIANPING
WU ZHENGXIA
ZHUO QICONG

Assignees

兰州志一化工有限公司

Dates

Publication Date: 20260508
Application Date: 20250912

Claims (6)

1. A nitrogen pulsing apparatus for producing ultraviolet light absorber UV-571 comprising: a crystallization kettle A; The seed crystal incubator E is welded on the side wall of the crystallization kettle A, a raw material liquid flowing pore channel (4-1) is arranged in the seed crystal incubator E and is communicated with the crystallization kettle A, and the front section of the flowing pore channel (4-1) is a curved pore channel (4-1-1); The seed crystal pretreatment ball bladder D is communicated with the seed crystal incubator E through a seed crystal conveying pipe (1-6), and a mixing cavity is arranged at the inner side of the seed crystal pretreatment ball bladder D; the seed crystal feeding device C is arranged on the outer wall of the seed crystal pretreatment bladder D and is used for feeding UV-P seed crystal particles; And the nitrogen pulse equipment B is arranged at the top end of the seed crystal pretreatment bladder D and is used for providing nitrogen for the seed crystal pretreatment bladder D.
2. The nitrogen pulse device for producing the ultraviolet absorbent UV-571 according to claim 1, wherein a material feed port (1-1-1), an emptying pipeline, a nitrogen inlet (1-2) and an emptying valve (1-3) are arranged at the top end of the crystallization kettle A, a manhole cover (1-5) is hinged at the top end of the crystallization kettle A, a seed crystal conveying pipeline (1-6) is communicated with the top end of the crystallization kettle A, a steam pipeline (1-6-1) and a circulating pipeline (1-6-2) are communicated with the outer wall of the crystallization kettle A, and a hydrophobic pipeline (1-6-3) and a discharging pipeline (1-7) are communicated with the bottom end of the crystallization kettle A.
3. The nitrogen pulse device for producing ultraviolet absorbent UV-571 according to claim 2, wherein the top end of the crystallization kettle A is rotatably penetrated by a rotating shaft, the bottom end of the rotating shaft extends into the crystallization kettle A and is fixedly provided with stirring blades, the top end of the crystallization kettle A is fixedly provided with a motor (1-4), and the output shaft of the motor (1-4) is coaxially fixed with the rotating shaft.
4. A nitrogen pulsing arrangement for the production of UV-571 as claimed in claim 3, wherein the back section of the flow channel (4-1) is a crystal forming channel (4-1-2) and the flow channel (4-1) is provided with seed crystal feed pieces (4-2).
5. The nitrogen pulsing apparatus for producing UV absorber UV-571 according to claim 4 wherein the seed crystal feeding means C is a UV-P seed crystal feeding port (2-3), the UV-P seed crystal feeding port (2-3) being fixedly connected to one side of the seed crystal feeding means C.
6. The nitrogen pulsing apparatus for producing ultraviolet absorbent UV-571 according to claim 5, wherein said nitrogen pulsing apparatus B comprises a pulsed nitrogen outlet tank (2-2), the outlet of pulsed nitrogen outlet tank (2-2) is connected to seed feeding means C through a pipe, and the inlet of pulsed nitrogen outlet tank (2-2) is connected to nitrogen pipe (2-1).

Description

Nitrogen pulse equipment for producing ultraviolet absorbent UV-571 Technical Field The utility model relates to the technical field of chemical refining equipment, in particular to nitrogen pulse equipment for producing an ultraviolet absorbent UV-571. Background In the current age of pursuing green development, environmental protection type coatings have become an integral part of building materials and industrial products. In the "green revolution," the sun is generous in delivering light and heat to the earth on the planet where we live. However, this generous portion also hides a thread of "skin conditioning" -Ultraviolet (UV) which, while providing energy for life, is a unbroken "damage king" for many materials. From plastics to coatings, from textiles to electronic equipment, prolonged exposure to ultraviolet light can lead to aging, discoloration and even performance degradation of the material. This is better than a long-lasting combat, where the ultraviolet absorber UV-571 (hereinafter UV-571) becomes the "shield rider" of the material. UV-571 is a high-performance ultraviolet absorber, and is specially used for protecting various high-molecular materials from ultraviolet rays. The chemical name of the compound is 2- (2H-benzotriazole-2-yl-6 dodecyl-4-methylphenol, which is called dibenzotriazole compounds for short, can effectively absorb the energy of ultraviolet rays and convert the energy into harmless heat energy to be released, thereby avoiding the damage of the internal structure of the material. Plastic products occupy an important place in modern society due to their light and economical features. However, plastics are susceptible to ultraviolet light, causing problems such as surface cracking and yellowing. UV-571 can significantly improve these problems as a plastic additive. For example, after UV-571 is added to PVC tubing for outdoor use, good physical properties can be maintained even after years of sun and rain. Coatings are widely used in the construction, automotive and furniture fields, and the surfaces of these products are often exposed directly to sunlight. Without proper protection, the coating may quickly powder or flake off. UV-571 plays a vital role here, which not only increases the weather resistance of the coating, but also ensures a permanently constant decorative effect. The application of UV-571 is particularly prominent in the field of outdoor sport clothing. Experimental data shows that the UPF value (uv protection factor) of the treated fabric can reach 50+, which means that more than 98% of the uv is shielded, providing omnidirectional protection to the wearer. With the growing global interest in environmental protection, the environmental protection properties of UV-571 have also been of interest. The product meets the EU REACH regulations and has been listed in the U.S. FDA approved list of food contact grade additives. This means that it is not only safe to the human body but also environmentally friendly. The reaction method commonly used at present is to directly cool and crystallize the UV-571 reaction liquid, separate out the UV-P raw material and remove unreacted UV-P. The method has the characteristics of little crystallization and precipitation of the UV-P raw material, poor crystal form of the UV-P crystals, difficult filtration, difficult production process and the like. Therefore, how to form stable UV-P crystal forms, the amount of crystallization is stable, the filtration time is reduced, and the production of higher quality UV-571 is a technical problem to be solved by those skilled in the art Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a nitrogen pulse device for producing an ultraviolet absorbent UV-571. In order to achieve the above purpose, the present utility model adopts the following technical scheme: a nitrogen pulsing apparatus for producing ultraviolet absorber UV-571 comprising: a crystallization kettle A; The seed crystal incubator E is welded on the side wall of the crystallization kettle A, a raw material liquid flowing pore canal is arranged in the seed crystal incubator E and is communicated with the crystallization kettle A, and the front section of the flowing pore canal is a curved pore canal; The seed crystal pretreatment ball bladder D is communicated with the seed crystal incubator E through a seed crystal conveying pipe, and a mixing cavity is formed in the inner side of the seed crystal pretreatment ball bladder D; The seed crystal feeding device C is arranged on the outer wall of the seed crystal pretreatment bladder D and is used for feeding UVP seed crystal particles; And the nitrogen pulse equipment B is arranged at the top end of the seed crystal pretreatment bladder D and is used for providing nitrogen for the seed crystal pretreatment bladder D. In one possible design, the top of crystallization kettle A is equipped with material feed inlet, evacuation pipelin