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Does the Production of Dye Intermediates Hurt the Body?

Ⅰ. Will dye intermediates affect people?

Whether you are an intermediate dye industry or a related practitioner, you will be concerned about whether the dye operation is toxic, including the harm to the body. First of all, we need to know which link you belong to in the intermediate dye industry. Generally, related trading companies or sales departments do not directly contact those products, so there is no safety problem. If it is a first-line factory, it depends on the process used in production.

Ⅱ. The production process of dye intermediates

The production of dye intermediates includes the following processes: basic organic raw materials such as benzene, naphthalene, anthracene, etc., undergo chemical reaction processes such as sulfonation, nitration, reduction, halogenation, amination, oxidation, acylation, and alkylation. Complex organic compound without dye characteristics.

The dye intermediate is made into the original dye through diazotization, coupling, and other reactions. The original dyes are then treated with dyes to obtain commercial dyes. The dye production process consumes a lot of raw materials, and the material consumption per ton can reach several to tens of tons. At the same time, one or more washings are often required in the production process, which generates a large number of by-products or waste materials, especially waste liquid. The amount is huge.

Ⅲ. Characteristics of wastewater from dyes and dye intermediates

1. There are many types of pollutants in wastewater. Dye and dye intermediate wastewater contains acids, alkalis, salts, halogens, hydrocarbons, nitro compounds, amines and dyes, and intermediates. Some also contain highly toxic benzidine, pyridine, ammonia, phenol, heavy metal mercury, Cadmium, chromium, etc.

2. High concentration of organic matter. The raw materials often contain sulfonic acid groups for acid dyes, direct dyes, and food dyes. They are easily soluble in water, causing these organic pollutants to exist in the waste liquid in a water-soluble state mainly.

3. High salt content. The salt content in wastewater can reach tens to hundreds of g/L.

4. Dyes have promoted its development in the direction of anti-photolysis, anti-oxidation, and anti-biodegradation, making it difficult to treat this wastewater by conventional methods.

5. Dye production is intermittent primarily operation, the process is relatively backward, and the quality of wastewater produced fluctuates wildly.

Fundamentally speaking, the method of dye intermediate wastewater should start with cleaning, implement the entire process of pollution source control, and discharge less or no wastewater. Promote clean production and implement the control process of industrial pollution sources. Strengthen the process management of the cooling water system and increase the utilization rate of water circulation.

Therefore, front-line workers or engineers engaged in producing dye products must wear protective clothing and undergo regular physical examinations. Some of the dye intermediates are hazardous chemicals, and some are not. It depends on the situation.