Continuous feeding type fluorescent whitening agent production method

A technology of fluorescent whitening agent and production method, which is applied in the direction of chemical instruments and methods, organic dyes, luminescent materials, etc., and can solve the problems of high production cost of fluorescent whitening agent, poor quality stability of fluorescent whitening agent products, and poor product quality. and low production efficiency, to achieve good water-saving and environmental protection effects, good environmental protection benefits and economic benefits, and the effect of product quality improvement

Pending Publication Date: 2022-06-28
BEIJING ODYSSEY CHEM
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Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the prior art, the traditional production technology of fluorescent whitening agent is mostly intermittent, there is work intensity big, the problem of low product quality and production efficiency, causes the produced fluorescent whitening agent The stability of product quality is poor, and the amount of waste water is large, which is easy to cause pollution. At the same time, it will also increase the cost of sewage treatment, resulting in the problem that the production cost of fluorescent whitening agent has been high. A continuous feeding method is proposed. Fluorescent whitening agent production method

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  • Continuous feeding type fluorescent whitening agent production method

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] see figure 1 , The present invention provides a technical solution: a continuous feeding type fluorescent whitening agent production method, the continuous feeding type fluorescent whitening agent production method comprises the following steps:

[0036] Step S1: adding an appropriate amount of cyanuric chloride to the batching kettle;

[0037] Step S2: when the internal temperature of the batching kettle tends to be stable, u...

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Abstract

The invention discloses a continuous feeding type fluorescent whitening agent production method, and belongs to the technical field of chemical production, the continuous feeding type fluorescent whitening agent production method comprises the following steps: S1, adding a proper amount of cyanuric chloride into a batching kettle; s2, after the temperature in the batching kettle tends to be stable, continuous and stable feeding of cyanuric chloride and 4, 4-diaminostilbene-2 is achieved by means of relevant parameter setting of a solid metering device. According to the invention, the feeding temperature and the reaction temperature of fluorescent whitening agent production can be accurately controlled, the product quality and the production efficiency of the automatic continuous production method are effectively improved, the discharged fluorescent whitening agent wastewater can be recycled, good water-saving and environment-friendly effects are achieved, green and clean production is realized to a relatively high extent, and the production cost is reduced. Various problems in a traditional intermittent production process are avoided, the stability of the production quality of the fluorescent whitening agent is effectively guaranteed, and the method has good environmental protection benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for producing a continuous feeding type fluorescent whitening agent. Background technique [0002] Fluorescent whitening agent is a fluorescent dye, or white dye, which is also a general term for a class of compounds. Its characteristic is that it can excite incident light to generate fluorescence, so that the dyed material obtains a sparkling effect similar to fluorite, making the material visible to the naked eye very white. Many industries have begun to use fluorescent whitening agents, such as: paper, plastic, Leather, detergent. At the same time, fluorescent whitening agents are also used in many high-tech fields. [0003] In the prior art, the traditional production process of fluorescent whitening agent is mostly intermittent, and there are problems of high work intensity, low product quality and production efficiency, resulting in poor q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/70C09B57/00C09K11/06
CPCC07D251/70C09K11/06C09B57/00C09K2211/1059
Inventor 吴细兵刘斌
Owner BEIJING ODYSSEY CHEM
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