Where is the city with the largest distribution and use of polyacrylamide?

Polyacrylamide is a petroleum derivative, the earliest domestic production by Sinopec and PetroChina, Daqing and Shengli Oilfield are using polyacrylamide, polyacrylamide use of the largest proportion of oil exploitation, followed by papermaking, water treatment and other industries, according to the source of polyacrylamide leakage: polyacrylamide is currently used in the sand washing industry and coal washing industry is also very large, the specific amount of the largest city, this is very simple, you check the ** is the oil field, ** the amount of use is large.

Hope it helps, hope!

The main production area of polyacrylamide is in Heilongjiang, and the output of Daqing Oilfield is the largest, of which the largest amount is used in addition to the oil exploitation industry, paper mills and water treatment industries.

In general, the flocculation effect will increase with the amount of polyacrylamide, but when the amount is excessive, the flocculant will turn back into a stable colloid.

First of all, it is very important to know the amount of polyacrylamide on the effect of flocculation. (As a chemical agent, there are many factors that affect the use of polyacrylamide, and there are many environmental factors in the configuration of the agent and the use of the agent, but the main influencing factors are: the amount of polyacrylamide, the nature and structure of polyacrylamide, the stirring speed and time of polyacrylamide, pH value, temperature and other factors.)

In general, the flocculation effect will increase with the increase of the amount of flocculant, but when the amount is excessive, the flocculant will become a stable colloid again; The optimal dosage is based on suspended solids.

Contain. The amount is derived from specific experiments. Influence of separation method and process design on flocculation effect.

Composite use of inorganic flocculant and organic polymer flocculant.

PAC+PAM: Generally, in the process of raw water treatment to remove solid particles and oily wastewater treatment to remove oil, the effect of polymer organic polyacrylamide is better, and the dosage is generally very small, but if it is used in combination with inorganic flocculants, the effect is better.

The combination of organic flocculant and inorganic flocculant is that the largest particle floc can be obtained, and the oil droplets can be agglutinated or adsorbed out.

Then there is the chemistry itself: the influence of the properties and structure of polyacrylamide on flocculation. The flocculant of organic polymer flocculant with linear structure has a good flocculation effect; Cyclic or branched structures are less effective; The functional groups of organic polymer flocculants are different in their polarity, hydrophilicity, charge properties, and charge neutralization ability, as well as the adsorption and reaction of colloidal particles.

If there are many functional groups, the charge density will be too high; There are few functional groups and the charge density is too low, which is not conducive to the neutralization of the charge. The influence of the molecular weight of the organic polymer flocculant on the flocculation effect: in general, the larger the molecular weight, the better the flocculation effect, and the molecular weight of the flocculant can not be less than that.

20 million.

But it should not be too high, otherwise it is not good for the capture and bridging of colloidal particles, and there is also a factor that cannot be ignored when testing is that the effect of polyacrylamide is also affected by the external environment: stirring speed and time: too fast, too long:

It will crush large solids into small particles, and crush particles that can precipitate into particles that cannot precipitate. The speed is too slow and the time is too short: the flocculant cannot be in full contact with the solid particles, which is not conducive to the flocculant to capture colloidal particles; Moreover, the concentration distribution of flocculant is not uniform, which is not conducive to the role of flocculant.

pH value: pH has a great influence on the surface charge potential of colloidal particles, the properties and effects of flocculants, etc.

When the water temperature is high, the reaction speed is too fast, and the flocs are fine; At low water temperature, the reaction speed is too slow, the hydrolysis time increases, which affects the amount of water treated, and the tearing effect of too high viscosity on the flocculant will also make the floc become smaller.

Polyacrylamide range of action:

1. Sewage treatment flocculant. For polyacrylamide with coarse and high concentration, positively charged, neutral or alkaline pH of suspended particles, the anionic molecular chain contains a certain amount of polar groups, which can adsorb the suspended solid particles in the water, thereby bridging the particles to form large flocs. Therefore, it accelerates the sedimentation of suspended particles, which has a significant effect of accelerating solution clarification and promoting filtration.

2. Drag reducer for petroleum industry. In the process of oil exploitation and production, polyacrylamide is used in oil production drilling, which can effectively reduce friction, improve oil recovery, prevent water channeling, and have obvious comprehensive effects.

3. Used as a thickener. Polyacrylamide has a high viscosity when dissolved in a ratio of one thousandth. Therefore, it can be added to some products to increase viscosity. It is often used in papermaking, alcohol, detergent and other products, and the effect is ideal.

4. In addition to the above three applications, it is also commonly used in the paper industry. It can effectively improve the retention rate of pigments and fillers, not only provide paper strength, but also reduce the loss of raw materials.

Polyacrylamide has a wide range of effects, and the treatment effect is more significant. It is especially used as a flocculant in sewage treatment, with a small amount and can effectively and quickly precipitate and purify. The vanadium flowers formed are large and dense, effectively stratified by mud and water, and the treated supernatant is clear and transparent.

The product is widely used in the treatment of chemical wastewater and waste liquid as well as the treatment of municipal sewage. Water treatment in tap water industry, high turbidity water purification, precipitation, coal washing, mineral processing, metallurgy, iron and steel industry, zinc and aluminum processing industry, electronics industry, etc. It can play a good role in precipitation, purification and flocculation.

1. For sludge dewatering, the corresponding model of this product can be selected according to the nature of the sludge, which can effectively dehydrate the sludge before the sludge enters the filter press, when dewatering, the floc is large, the filter cloth is not sticky, and the filter is not dispersed when pressing, the mud cake is thicker, the dewatering efficiency is high, and the moisture content of the mud cake is less than 80%.

2. For the treatment of domestic sewage and organic wastewater, this product is positive in the matching or alkaline medium, so that the sewage with negative charge of suspended particles in the sewage is flocculated and precipitated, and the clarification is very effective.

3. Papermaking reinforcing agents and other additives. Improve the retention rate of fillers and pigments, and the strength of paper.

4. It is used as an auxiliary agent for oilfield economics, such as clay anti-swelling agent and thickener for oilfield acidification.

5. It is used as a textile sizing agent, with stable slurry performance, less slurry, low fabric breakage rate, and smooth cloth surface.

What are the types of polyacrylamide and what are the functions of each one?

Classification and function of polyacrylamide: The species of polyacrylamide are generally divided into four categories: anionic, cationic, nonionic, and zwitterionic type. Anionic polyacrylamide is mainly used for suspending particles, coarse, high concentration, particles with positive charge, water pH value is neutral or alkaline sewage, accelerating the sedimentation of particles in suspension, has a very obvious effect of accelerating the clarification of the solution, promoting filtration and so on.

Cationic polyacrylamide is cationic in acidic or alkaline media, it usually has a lower molecular weight than anionic or non-ionic polyacrylamide, and its performance is mainly obtained through charge neutralization. The function of this kind of flocculant is mainly to flocculate with a negative charge, and has the functions of turbidity removal and decolorization. The advantage of nonionic polyacrylamide is mainly used as a flocculant.

Because its molecular chain contains a certain amount of polar genes, it can adsorb solid particles suspended in water, so that the particles can bridge to form large flocs. Nonionic polyacrylamide can accelerate the sedimentation of particles in suspension, have a very obvious effect of accelerating the clarification of the solution, promoting filtration, etc., and is widely used in the treatment of wastewater and waste liquid in the chemical industry and municipal sewage treatment. This product is especially suitable when the sewage is acidic.

It can be used in combination with inorganic flocculants such as polyiron and aluminum. Because the molecule contains cationic groups and anionic groups, zwitterionic polyacrylamide has the characteristics of general cationic flocculants, and shows better performance. These flocculants can be used over a wide pH range, with higher filtration water, lower cake moisture content, and can also be used for strong acid leaching ore or from metal-containing acid catalysts for the most valuable metals.

The zwitterionic type is by no means a mixture of anionic and cationic types. If cationic polyacrylamide is used in combination with anionic polyacrylamide, a reaction will occur to produce precipitation. Therefore, zwitterionic products are the most ideal.

Summary. Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)N. It is a hard glassy solid at room temperature, and the products include glue, latex and white powder, translucent beads and flakes.

Good thermal stability. It can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid. After long-term storage, the viscosity of the solution will decrease due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor.

1] Polyacrylamide, as a lubricant, suspension agent, clay stabilizer, oil displacement agent, water loss reducing agent and thickener, has been widely used in drilling, acidizing, fracturing, water plugging, cementing, secondary oil recovery and tertiary oil recovery, and is an extremely important oilfield chemical.

What is the main use of polyacrylamide and what are its characteristics?

Polyacrylamide (PAM) is a linear polymer with the chemical formula (C3H5NO)N. At room temperature, it is a hard glassy solid, and the products include glue, latex and white powder, translucent beads and flakes. Good thermal stability.

It can be dissolved in water in any proportion, and the aqueous solution is a uniform and permeable liquid. After long-term storage, the viscosity of the solution will decrease due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor. 1] Polyacrylamide, as a lubricant, suspension agent, clay stabilizer, oil displacement agent, water loss reducing agent and thickener, has been widely used in drilling, acidizing, fracturing, water plugging, cementing, secondary oil recovery and tertiary oil recovery, and is an extremely important oilfield chemical.

Features: high strength and low elongation.