Preparation method of flocculating agent used for treating oily sewage

Abstract

The invention discloses a preparation method of a flocculating agent used for treating oily sewage, which is mainly characterized in that chitosan is used as the main material, meanwhile, poly-ferricsulfate, poly-aluminum sulfate, poly (diallyldimethylammonium chloride) and thiocarbanilide copper complex are added in the preparation process to perform modification treatment, and a steady chelatecompound is formed by amino groups and carboxy groups in chitosan molecules and mercury, lithium, copper, lead, silver and other heavy metal ions in sewage, so as to remove and recycle metal ions in waste water. The flocculating agent prepared according to the invention has a good adsorption effect, and the better the biocompatibility is, the stronger the adsorption effect for grease dirt is. Theflocculating agent can also be used for decoloration of waste water in sewage treatment, and adsorption and flocculating reaction and the like of waste water in industrial production, thus having goodpopularization and application values.

Description

technical field

[0001] The invention relates to a flocculant, in particular to a flocculant used in the treatment of oily sewage. Background technique

[0002] With the development of industry, especially the development of petrochemical industry, the discharge of oily wastewater is increasing day by day, and its pollution to the environment is also becoming more and more serious. There are many sources of oily wastewater, among which the oily wastewater discharged from the petroleum industry and solid fuel thermal processing industry is the main source. In industrial enterprises such as petroleum, chemical industry, steel, coking, gas generation stations, machinery manufacturing and food processing, all water that is in direct contact with oil contains oil. In the process of oil production, oily wastewater mainly comes from oilfield produced water and water injection well flushing water. With the continuous development of oilfields and the continuous development of oil re...

Examples

Embodiment 1

[0010] Weigh 16 parts by weight of chitosan into a three-necked flask, add 67 parts by weight of isopropanol, 19.5 parts by weight of NaOH solid and 100 parts by weight of deionized water, and stir and swell for 2 to 5 hours at a temperature of 60°C. Dissolve 10 parts by weight of chloroacetic acid in 30 parts by weight of isopropanol, and add it dropwise to the above solution while stirring, and complete the dropwise addition within 20 minutes. During the dropping process, the temperature is controlled at 60-70°C. Continue to react for 8h. After cooling, filter with a Buchner funnel, use 70% ethanol solution to remove salt and alkali from the filter residue, and filter 3 to 5 times. Then wash and filter with 95% ethanol by mass fraction, operate 3 times, and vacuum-dry the above-mentioned powder solid at 70°C to obtain sodium carboxymethyl chitosan.

[0011] 2) Take 5 parts by weight of the above-mentioned sodium carboxymethyl chitosan and put it in a beaker filled with acet...

Embodiment 2

[0015] It is exactly the same as Example 1, except that 10 parts by weight of chitosan is weighed in a beaker, and 60 parts by weight of isopropanol and 15.5 parts by weight of NaOH solid are added into the beaker.

Embodiment 3

[0017] It is exactly the same as Example 1, except that 11 parts by weight of chitosan is weighed in a beaker, and 62 parts by weight of isopropanol and 16.5 parts by weight of NaOH solid are added into the beaker.

technical field

[0001] The invention relates to a flocculant, in particular to a flocculant used in the treatment of oily sewage. Background technique

[0002] With the development of industry, especially the development of petrochemical industry, the discharge of oily wastewater is increasing day by day, and its pollution to the environment is also becoming more and more serious. There are many sources of oily wastewater, among which the oily wastewater discharged from the petroleum industry and solid fuel thermal processing industry is the main source. In industrial enterprises such as petroleum, chemical industry, steel, coking, gas generation stations, machinery manufacturing and food processing, all water that is in direct contact with oil contains oil. In the process of oil production, oily wastewater mainly comes from oilfield produced water and water injection well flushing water. With the continuous development of oilfields and the continuous development of oil re...

Examples

Embodiment 1

[0010] Weigh 16 parts by weight of chitosan into a three-necked flask, add 67 parts by weight of isopropanol, 19.5 parts by weight of NaOH solid and 100 parts by weight of deionized water, and stir and swell for 2 to 5 hours at a temperature of 60°C. Dissolve 10 parts by weight of chloroacetic acid in 30 parts by weight of isopropanol, and add it dropwise to the above solution while stirring, and complete the dropwise addition within 20 minutes. During the dropping process, the temperature is controlled at 60-70°C. Continue to react for 8h. After cooling, filter with a Buchner funnel, use 70% ethanol solution to remove salt and alkali from the filter residue, and filter 3 to 5 times. Then wash and filter with 95% ethanol by mass fraction, operate 3 times, and vacuum-dry the above-mentioned powder solid at 70°C to obtain sodium carboxymethyl chitosan.

[0011] 2) Take 5 parts by weight of the above-mentioned sodium carboxymethyl chitosan and put it in a beaker filled with acet...

Embodiment 2

[0015] It is exactly the same as Example 1, except that 10 parts by weight of chitosan is weighed in a beaker, and 60 parts by weight of isopropanol and 15.5 parts by weight of NaOH solid are added into the beaker.

Embodiment 3

[0017] It is exactly the same as Example 1, except that 11 parts by weight of chitosan is weighed in a beaker, and 62 parts by weight of isopropanol and 16.5 parts by weight of NaOH solid are added into the beaker.

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