Preparation method of industrial sewage/wastewater decolorant

Abstract

The invention relates to the technical field of design and manufacturing of industrial sewage / wastewater decolorants, and particularly provides a preparation method of an industrial sewage / wastewater decolorant. The preparation method comprises the following steps: (1) proportionally and sequentially adding 2-8 parts of liquid dicyandiamide, 7-13 parts of formaldehyde, 1-5 parts of catalyst and 1-3 parts of aluminum sulfate into a reaction kettle, stirring for 10-15 minutes, heating to 65-80 DEG C, and keeping the temperature for 3-5 hours; and (2) after the mixed solution reaction is finished, stopping stirring, and cooling to room temperature to obtain the product decolorant, wherein the catalyst is Al2O3. The decolorant is mainly used for decolorization and decontamination of industrial sewage / wastewater.

Description

technical field

[0001] The technical field of design and manufacture of the industrial sewage wastewater decolorizer of the present invention, especially a preparation method of the industrial sewage wastewater decolorizer is designed. Background technique

[0002] At present, sewage treatment units generally adopt the combined process of "physical and chemical precipitation (or air flotation) + anaerobic (or facultative oxygen) + aerobic + physical and chemical precipitation" to treat sewage, which not only effectively removes more than 40% of COD and other such as Suspended solids, ammonia nitrogen, etc. At the same time, this process can also have a certain decolorization effect. However, the effect is not very satisfactory. At present, after the biochemical water is produced by many production enterprises, other indicators can meet the standards, but the chromaticity of the sewage and wastewater is not easy to eliminate. Usually, the produced sewage and wastewater are mo...

Examples

specific Embodiment

[0006] Specific embodiments (according to parts by weight)

[0007] raw material

Dicyandiamide / part

Formaldehyde / part

Catalyst / part

Aluminum sulfate / part

Example 1

2

13

1

3

Example 2

5

10

3

2

Example 3

8

7

5

1

[0008] (1) Add liquid dicyandiamide, formaldehyde, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the parts by weight in the above table, stir for 10-15min, heat up to 65-80°C, and keep warm for 3-5h;

[0009] (2) After the above-mentioned mixed solution reaction finishes, stop stirring, after being cooled to room temperature, obtain this product decolorizing agent; Described catalyst is Al 2 o 3 .

technical field

[0001] The technical field of design and manufacture of the industrial sewage wastewater decolorizer of the present invention, especially a preparation method of the industrial sewage wastewater decolorizer is designed. Background technique

[0002] At present, sewage treatment units generally adopt the combined process of "physical and chemical precipitation (or air flotation) + anaerobic (or facultative oxygen) + aerobic + physical and chemical precipitation" to treat sewage, which not only effectively removes more than 40% of COD and other such as Suspended solids, ammonia nitrogen, etc. At the same time, this process can also have a certain decolorization effect. However, the effect is not very satisfactory. At present, after the biochemical water is produced by many production enterprises, other indicators can meet the standards, but the chromaticity of the sewage and wastewater is not easy to eliminate. Usually, the produced sewage and wastewater are mo...

Examples

specific Embodiment

[0006] Specific embodiments (according to parts by weight)

[0007] raw material

Dicyandiamide / part

Formaldehyde / part

Catalyst / part

Aluminum sulfate / part

Example 1

2

13

1

3

Example 2

5

10

3

2

Example 3

8

7

5

1

[0008] (1) Add liquid dicyandiamide, formaldehyde, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the parts by weight in the above table, stir for 10-15min, heat up to 65-80°C, and keep warm for 3-5h;

[0009] (2) After the above-mentioned mixed solution reaction finishes, stop stirring, after being cooled to room temperature, obtain this product decolorizing agent; Described catalyst is Al 2 o 3 .