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Device for preparing toluylene bis(triazinyl) particular fluorescent whitening agent and preparation method thereof

A fluorescent whitening agent and bis-triazine technology, applied in styrene-based dyes, chemical instruments and methods, organic dyes, etc., can solve the problems of complex wastewater treatment procedures, high engineering investment, and poor biodegradability, and achieve Improve the reaction effect, simplify the process, accelerate the effect of dissolution and reaction speed

Active Publication Date: 2017-05-10
山西青山化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcoming of this process is that the molecule of stilbene bistriazine fluorescent whitening agent contains several water-soluble sulfonic acid groups, which makes it have a certain solubility in water. During the liquid separation process, part of the product will be lost with the waste water, resulting in loss
In addition, 5-10 tons of wastewater needs to be discharged for every ton of fluorescent whitening agent produced. Since this wastewater is a typical fine chemical wastewater, its chemical oxygen consumption (CODCr) is generally above 4000mg / L, and the ratio of BOD5 / CODCr is generally If it is less than 0.2, the biodegradability is poor, and the salt content in the wastewater is above 1%, so the treatment process of this type of wastewater is relatively complicated, and even strong electrolysis, Fenton oxidation, ozone and various biochemical treatment units are used to treat this type of wastewater. The project investment of similar sewage is very high, and the cost of wastewater treatment per ton is also very high, generally above 35 yuan / ton

Method used

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  • Device for preparing toluylene bis(triazinyl) particular fluorescent whitening agent and preparation method thereof
  • Device for preparing toluylene bis(triazinyl) particular fluorescent whitening agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A device for preparing stilbene bistriazine granular fluorescent whitening agents, including three shrinking sections, a second shrinking section, and a third shrinking section; the first shrinking section includes a first reactor connected in a sequential cycle, a The water pump, the DSD acid homogenizer, the cyanuric chloride homogenizer, the first circulation channel formed by the first reaction chamber, the first acid-binding agent metering tank and the crushed ice metering tank are connected to the first reaction chamber; the second shrinkage section includes the sequence The second circulation channel formed by the connected second reaction kettle, the second water pump, and the second reaction chamber, the second acid-binding agent metering tank and the second shrinkage raw material metering tank are connected to the second reaction chamber; the third shrinkage section includes a sequentially connected third The third circulation channel formed by the reaction ket...

Embodiment 2

[0022] A method utilizing the device in Example 1 to prepare stilbene bistriazine granular fluorescent whitening agent, under stirring, 1300kg of water and 2300kg of borneol were added to the 15m 3 After mixing in the first reaction chamber, start the first water pump, let the first circulation channel be filled with 0 ℃ ice-water mixture, turn on the power supply of DSD acid homogenizer and cyanuric chloride homogenizer, and 1000kgDSD acid powder required for the reaction and 1000kg of cyanuric chloride are added to their respective homogenizers for high-speed grinding and dispersion. The ice water in the loop first flows through the DSD acid homogenizer, then through the cyanuric chloride homogenizer, and then through the 250L first reaction room, when the material reaches the first reaction chamber, open the high level tank valve of the soda ash solution (the first acid-binding agent metering tank), add the soda ash solution dropwise to the first reaction chamber, control th...

Embodiment 3

[0025] A method utilizing the device in Example 1 to prepare stilbene bistriazine granular fluorescent whitening agent, under stirring, 1300kg of water and 2300kg of borneol were added to the 15m 3 After mixing in the first reaction chamber, start the first water pump, let the first circulation channel be filled with 0 ℃ ice-water mixture, turn on the power supply of DSD acid homogenizer and cyanuric chloride homogenizer, and 1000kgDSD acid powder required for the reaction and 1000kg of cyanuric chloride are added to their respective homogenizers for high-speed grinding and dispersion. The ice water in the loop first flows through the DSD acid homogenizer, then through the cyanuric chloride homogenizer, and then through the 250L first reaction room, when the material reaches the first reaction chamber, open the high level tank valve of the soda ash solution (the first acid-binding agent metering tank), add the soda ash solution dropwise to the first reaction chamber, control th...

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Abstract

The invention belongs to the technical field of fluorescent whitening agent preparation, and particularly relates to a device for preparing a toluylene bis(triazinyl) particular fluorescent whitening agent in a zero-waste-water-discharge manner and a preparation method thereof. The device for preparing the toluylene bis(triazinyl) particular fluorescent whitening agent is characterized in that the water putting quantity is reduced in a first condensing work section, a second condensing work section and a third condensing work section through circular reaction; meanwhile, in the first condensing work section, DSD acid powder is directly fed without dissolution, so that the zero waste water discharge in the reaction system is realized; after the third condensing reaction is completed, the pressure spraying drying is directly performed. The invention also relates to a method for concretely preparing the toluylene bis(triazinyl) particular fluorescent whitening agent by using the device.

Description

technical field [0001] The invention belongs to the technical field of fluorescent whitening agent preparation, in particular to a device and a preparation method for preparing stilbene bistriazine granular fluorescent whitening agent with zero waste water discharge. Background technique [0002] Stilbene bis-triazine fluorescent whitening agents are the most widely used category of fluorescent whitening agents, accounting for no less than 60% according to conservative estimates, and are widely used in synthetic detergents, papermaking, printing and dyeing, and other fields. Its current production process is as follows: (1) shrinkage reaction: add bottom water into the reaction kettle, start the stirring paddle, put in crushed ice, add cyanuric chloride, emulsify for 1 hour, and then evenly add the pre-prepared concentration of 10%- Add 15% 4,4'-diaminostilbene-disulfonic acid (DSD acid) sodium salt solution, drop in 10% soda ash solution and other acid-binding agents at the...

Claims

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Application Information

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IPC IPC(8): C09B23/14C09B67/02C09B67/06
CPCC09B23/148C09B67/0003C09B67/0097
Inventor 甘宏宇季东峰王真祥王刚
Owner 山西青山化工有限公司
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