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Method for quick detection of concentration of 2,4-diaminotoluene in industrial production

A technology of diaminotoluene and detection method, which can be applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of heavy environmental burden and achieve the effect of rapid detection

Active Publication Date: 2017-04-26
CANGZHOU FENGYUAN ENVIRONMENTAL PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the TDI production process, the factory will generate solid waste residues accounting for about 10% of the total output
The slag belongs to hazardous waste, which needs to be incinerated to make it harmless, but at the same time, a large amount of carbon oxides, nitrogen oxides and smoke are released, which has a great burden on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Embodiment: 2,4-diaminotoluene concentration rapid detection method (TLC detection method) in industrial production, it comprises the following steps: (1) the preparation of the activation of silica gel plate and standard sample; (2) choose representative sample ; (3) precondition the sample; (4) detect the concentration value in the sample.

[0016] (1) The silica gel plate should be activated for 60 minutes at a temperature of 100±1°C. Preparation of standard samples: Weigh 2,4-TDA with an analytical balance and prepare the concentration to be 1mg / g, 2mg / g, 3mg / g, 4mg / g, 5mg / g, 6mg / g, 7mg / g, 8mg / g g, 9mg / g, corresponding solutions of 9 samples in total.

[0017] (2) Select a representative sample: During the sampling process, first open the sampling valve to let the reaction solution flow out. After the reaction solution has reached temperature, use a glass beaker to sample. After cooling down slightly, shake well and take 10ml into a straight tube.

[0018] (3) Pre...

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PUM

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Abstract

The invention discloses a method for quick detection of the concentration of 2,4-diaminotoluene in industrial production. The method includes the steps of (1), activating a silica gel plate and preparing standard samples; (2), selecting a representative sample; (3), pretreating the sample; (4), detecting a concentration value of the sample. The method has the advantages that the method is capable of detecting the concentration of the 2,4-diaminotoluene quickly, monitoring reaction degree during production and controlling a reaction process, is low in detection cost and can meet production requirements.

Description

technical field [0001] The invention relates to a rapid determination technology of the reaction solution concentration in industrial production by thin-layer chromatography. Background technique [0002] TDI (toluene diisocyanate) is one of the main raw materials of polyurethane plastics. It is widely used in the production fields of soft foam, elastomer, synthetic leather slurry, adhesive, coating, fiber and leather fabric finishing agent. It is a high value-added chemical industry. product. However, in the process of TDI production, the factory will generate solid waste residue which accounts for about 10% of the total output. The slag belongs to hazardous waste and needs to be incinerated to make it harmless, but at the same time it releases a large amount of carbon oxides, nitrogen oxides and smoke, which is a very heavy burden on the environment. In order to effectively recycle resources and reduce the environmental burden, Hebei Fengyuan Environmental Protection Tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/90
CPCG01N30/90
Inventor 苏德水邵方朱建华黄津刘月娥孟凡伟赵立宁
Owner CANGZHOU FENGYUAN ENVIRONMENTAL PROTECTION SCI & TECH