Ｗhat is the difference for Cationic, anionic, non - ionic polyacrylamide in applications?
Polyacrylamide (PAM) is a linear water-soluble polymer, which is the most widely used water-soluble polymer compound
One of the varieties, PAM and its derivatives can be used as a highly effective flocculant, thickener, paper intensifier and liquid resistance reductionAgent, widely used in water treatment, paper making, petroleum, coal, mining and metallurgy, geology, textile, construction and other industrial sectors.
Non-ionic polyacrylamide uses:
Sewage treatment agent: non-ionic polyacrylamide is more suitable as flocculant when the suspended sewage is acidic. This is PAM adsorption bridge role, so that the suspended particles flocculation precipitation, to achieve the purpose of sewage purification. Can also be used for the purification of tap water, especially with the use of inorganic flocculant, the best effect in water treatment.
Textile industry auxiliaries: add some chemicals can be made into chemical data, used for textile sizing.
Sand control and sand fixation: non-ionic polyacrylamide dissolved into 0.3% concentration to add crosslinking agent, spray on the desert can play a role in sand control and sand fixation.
Soil humectant: used as soil humectant and various modified polyacrylamide basic raw materials.
Cationic polyacrylamide uses:
Sludge dewatering: according to the nature of pollution can choose the corresponding brand of this product, can effectively gravity sludge before entering the pressure filtration
Water. Dehydration, the production of flocculation, non-stick filter cloth, in the pressure of the filter does not disperse, less dosage, high dehydration efficiency, mud cake moisture content in 80%
Sewage and organic wastewater treatment: this product in acidic or alkaline media are positive, so suspended in sewage
Particle with negative charge of sewage flocculation precipitation, clarification is extremely effective, such as liquor factory wastewater, brewery wastewater, gourmet gourmet factory wastewater, sugar factory wastewater, Meat and food factory wastewater, beverage factory wastewater, textile printing and dyeing factory wastewater, with cationic polyacrylamide than anionic polyacrylamide, non-ionic polyacrylamide or inorganic salt effect is several times or dozens of times higher, because this kind of wastewater is generally with negative charge.
Flocculant for water treatment of waterworks: this product has the characteristics of less dosage, good effect and low cost, and it has better effect when combined with inorganic flocculant.
Oilfield chemicals: such as clay antiswelling agent, thickening agent for oilfield acidification, etc.
Paper additives: cationic PAM paper strengthening agent is a water-soluble cationic polymer containing amino formyl, with strengthening, retention, filtration and other functions, can effectively improve the strength of paper. The product is also a highly effective dispersant.
Anionic polyacrylamide uses:
Industrial wastewater treatment: for suspended particles, higher concentration, particles with positive charge, the PH value of water is neutral or alkaline
Sewage, iron and steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater and other sewage treatment, the best effect. Drinking water treatment:
The water source of many waterworks in Our country comes from rivers, silt and mineral content is high, relatively turbid. although filtered by precipitation, it is still
Can not meet the requirements, need to add flocculant, dosage is 1/50 of inorganic flocculant, but the effect is several times of inorganic flocculant,
For serious organic pollution of river water can be used inorganic flocculant and my company's cationic polyacrylamide with the use of effect
Fruit is better. Amylase factory and distillery loss of starch distillery recycling: now many amylase factory wastewater contains a lot of starch, now
Anionic polyacrylamide is added to make starch particles flocculate and precipitate, and then the precipitate is pressed into cake shape by the press filter, which can be made
Feed, alcohol factory can also use anionic polyacrylamide dehydration, pressure filtration recovery.
Product introduction: Polyscrylamide is short for PAM. It is cationic, anionic and non-ionic. The molecular weight of PAM ranges from 4 million to 20 million.
Polyacrylamide molecules with positive groups (-CONH2), and dispersed in the solution of suspended particles adsorption and bridging, has a strong flocculation, so it is widely used in water treatment and metallurgy, paper making, petroleum, chemical, textile, mineral processing and other fields. PAM used for sewage treatment, the removal efficiency of organic matter in water is high, the amount of less, the sedimentation speed is fast, the cost of water is low, is other flocculant can not replace the product.
There are anionic, cationic and nonionic polyacrylamide types.
Anionic type is mainly used for domestic production water, industrial and municipal sewage treatment. It is also suitable for flocculation and sedimentation of red mud and mud separation in the process of alumina preparation. Cationic type with high molecular weight is mainly used for flocculation and precipitation of water suspension and turbidity. It is very difficult to flocculate when acidic and partial acidic solutions contain organic turbidity. In this case, cationic polyacrylamide can effectively flocculate precipitation, showing its outstanding performance. Use the form of 0.1-0.2% aqueous solution, must be prepared with water Ph≤7, with dilute solution after easy hydrolysis. It should be used together or used up on the same day, not for a long time.
Usage: PAM can be used alone or in combination with PAC for water treatment, but the mixing of PAM and PAC must be carried out separately. Determine the amount of water and dosage for dilution according to their own conditions.
Packaging and storage: The product is double-sealed with non-toxic POLYETHYLENE bag inside and plastic woven bag outside. The net weight of each bag is 25kg. Take precautions against moisture and avoid package damage. Store in a clean and dry environment.
It is mainly used to deal with neutral suspensions mainly composed of inorganic solids.
Anionic polyacrylamide is used to improve the removal of suspended solids, BOD and phosphate in municipal and industrial wastewater treatment. Adding 0.25mg/L hydrolyzed polyacrylamide in the primary wastewater sedimentation tank can increase the removal rates of suspended solids and BOD to 66%-23%, respectively. When 0.3mg/L anionic flocculant was added into the secondary wastewater treatment sedimentation tank, the removal rates of suspended solids and BOD could be increased to 87% and 91%, respectively. In the treatment of drinking water and domestic wastewater, it is used for surface water clarification, cleaning wastewater clarification and filtrate adjustment, etc. , used in mining for the clarification and flotation tailings, coal washing water plant filter, tailings (residue) dehydration, flotation tailings thickening and filtering to clarify, concentrate and hot potash solution and flotation processing liquid clarification, fluorite and barite flotation tailings clarification, are also used in the original brine salt processing, clarification of sludge dewatering, and phosphate recycling water treatment, etc. In casting and manufacturing industries, it is used for the purification of open furnace gas washing water, the clarification of waste water from powder metallurgy and pickling plants, the purification of electrolyte and the clarification of electroplating waste liquid.
Cationic polyacrylamide is made of cationic monomer (DM, DMC, CPF, KMKAAC, DMAEMA, etc.) copolymerization of acrylamide, to granulation, drying, crushing, product appearance is white fine particles or powder.
1, sludge dewatering: according to the nature of sludge can choose the corresponding products of the corresponding molecular weight of the product, can effectively in the sludge into the pressure filter before gravity sludge dewatering. Dehydration, the production of large flocs, non-stick filter cloth, in the pressure of the filter does not disperse, less dosage, high dehydration efficiency, mud cake moisture content in 80% below.
2, sewage and organic waste water treatment: this product in acidic and alkaline medium is electropositive, so that the suspended particles in wastewater with negatively charged sewage flocculation precipitation, such as alcohol plant waste water, wastewater, RouShiChang brewery wastewater and gourmet powder factory wastewater, sugar refinery wastewater, beverage factory waste water, textile dyeing wastewater, etc., With cationic polyacrylamide than anionic polyacrylamide, non-ionic polyacrylamide or inorganic salt effect is several times or tens of times higher, because this kind of water with negative charge.
3, water plant flocculant treatment: the product has the characteristics of less dosage, good effect, low cost, especially with inorganic flocculant compound use effect is better. It will be a highly effective flocculant for water plants in the Yangtze, Yellow and other basins.
4, paper additives: cationic PAM paper strengthening agent is a water-soluble cationic polymer containing amino formyl, with enhanced, retention, filtration and other functions, can effectively improve the strength of paper. The product is also a highly effective dispersant
5, oil field chemicals: polyacrylamide in oil field drilling and oil field exploitation also has a certain chemical effect, such as it can be used as clay antiswelling agent, oil field acidification with thickening agent.
Non-ionic polyacrylamide is a homopolymer of acrylamide monomer, which is granulated, dried and crushed. The appearance of the product is white fine particles or powder solid.
1, all kinds of modified polyacrylamide basic raw materials
Such as anionic polyacrylamide, according to the use of different grades of non-ionic polyacrylamide as a base raw material for hydrolysis, Manich positive ion polyacrylamide, one of the most important basic raw materials.
2, textile industry auxiliaries
Add some other chemicals can be prepared into chemical slurry, used for textile sizing, can improve the adhesion, permeability and desizing performance, is the textile has anti-static, reduce the skein pulp spot, cloth machine break rate and falling, therefore, it has become the textile industry to chemical additives.
3, can be used for sewage treatment
When sewage show acid slurry, using nonionic polyacrylamide, as flocculating agent is most appropriate, then is adsorption of PAM, suspending particles produce flocculation precipitation, achieve the purpose of purifying water, also can be used as water treatment, this product is non-toxic, especially and inorganic flocculant, the best water treatment results.
4. Chemical grouting agent
Using 9.5 parts of non-ionic polyacrylamide plus 0.5 parts of N, N -- methylene bisacrylamide miscible can be used as a chemical grouting agent for water plugging of dam, ground grave and tunnel.
5, sand control and sand fixation
Non-ionic polyacrylamide into 0.3% concentration of solution, in the addition of crosslinking agent, spray on the desert, can play a role in sand control and sand fixation. The compromise method is one of the most effective ways to control desert and prevent desertification.
6. Soil moisturizer
Non-ionic polyacrylamide is highly hygroscopic, it can retain moisture in the soil, in arid areas, the use of the product can improve the soil.
7. Profile control and water plugging agent in oil field
Non-ionic polyacrylamide can be widely used as profile control and water plugging agent in oil field by combining with essential cellulose and adding certain chemical additives.