Technology for turning wastewater of melamine resin production into resource
A technology for the production of wastewater and melamine resin, which is applied in organic chemistry, chemical instruments and methods, and the preparation of organic compounds, and can solve problems such as difficulty in reaching standards and high operating costs
Inactive Publication Date: 2012-06-27
CHONGQING RUIZHI ENVIRONMENTAL TECH
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Problems solved by technology
Difficulty in reaching standards, high operating costs, and no recovery of by-products are the defects of existing treatment technologies
At present, there is no technical report on the resource utilization of melamine resin production wastewater at home and abroad, especially through the conversion and recovery of organic pollutants in the wastewater to obtain high-value-added high-efficiency water reducers and pharmaceutical intermediates, so that melamine resin production enterprises can achieve Clean production of melamine resin production waste water recycling technology
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[0016] Taking a melamine resin production enterprise with an annual output of 30,000 tons as an example, the annual production of the enterprise is calculated on the basis of 300 days, and the total amount of production wastewater discharged every day is 200 m 3 , the content of hydroxymethyl compounds in wastewater is 5~9%, formaldehyde 2~10%, and the designed wastewater treatment capacity is 200 m 3 / day, the concentration of formaldehyde in wastewater is calculated according to 3%, and the concentration of methylol compounds is calculated according to 7%. A waste water recycling production line is constructed by using the waste water recycling technology of the melamine resin production of the present invention. The production process is according to the process of the present invention, the waste water is recycled as a resource, the high-efficiency water reducer sulfonated melamine-formaldehyde resin, the pharmaceutical intermediate sodium hydroxymethyl sulfonate and the ...
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The invention relates to a technology for turning wastewater of melamine resin production into resource. A method comprises the following steps: adding sulfite into the wastewater, and causing the sulfite to react with formaldehyde and melamine resin in the wastewater, thereby generating an efficient water-reducing agent, namely, sulfonated melamine formaldehyde resin, and a medicine midbody, namely, sodium hydroxymethane sulfonate; concentrating the efficient water-reducing agent through a first-level membrane concentrated solution; concentrating the penetrating liquid by a second-level membrane concentrated solution; and after removing impurities by adding lime, adding alcohol crystal into the concentrated solution, thereby obtaining the medicine midbody, namely, the sodium hydroxymethane sulfonate, wherein the penetrating liquid reaches the national first-level emission standard. According to the technology, the organic pollutants in the wastewater can be converted into the efficient water-reducing agent and the medicine midbody, namely, the sodium hydroxymethane sulfonate, with high added value. The technical problem of turning the wastewater of the melamine resin production into the resource is solved.
Description
technical field [0001] The invention relates to a resource utilization technology of melamine resin production wastewater in the field of sewage treatment and clean production. Especially in the process of melamine resin production wastewater treatment, the high-concentration organic pollutants are converted into high value-added chemical products, and the resource-based clean production technology that realizes zero discharge of wastewater pollutants at the same time. Background technique [0002] Melamine resin, also known as melamine formaldehyde resin, is widely used in various industries because of its colorless, transparent, light resistance, boiling water resistance, self-extinguishing, non-toxic and good mechanical properties. chemical products. However, due to the production process of melamine resin, a large amount of high-concentration organic wastewater containing formaldehyde, melamine and other impurities will be produced. Due to the sterilizing effect of form...
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IPC IPC(8): C02F9/04C04B24/28C08G12/40C07C309/08C07C303/32C07C303/44C04B103/30
Inventor 杨胜旺
Owner CHONGQING RUIZHI ENVIRONMENTAL TECH