Continuous feeding type fluorescent whitening agent production method

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...

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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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