Introduction to the production process of polyacrylamide Polyacrylamide is a commonly used inorganic polymer flocculant, which is widely used in China's municipal sewage treatment, tap water, industrial sewage purification and other fields. In terms of comprehensive comparison, polyacrylamide has the characteristics of strong adaptability, ideal treatment effect and low comprehensive cost, so it is favored by various fields of water treatment. Everyone knows the conventional physical and chemical properties of polyacrylamide, so how much do you know about the production process of polyacrylamide? Polyacrylamide Polyacrylamide is divided into anionic, cationic, non-ionic, zwitterion, etc. according to the ion type, although it is divided into four types, but the actual polyacrylamide production process is basically the same, Jiaxin water purification for polyacrylamide production to make a brief introduction. Simply summarized as: acrylonitrile (the most important raw material of polyacrylamide) + (water catalyst and water) → polymerization → crude acrylamide products→ flash drying → refined → polyacrylamide finished products. To be precise, the production process of polyacrylamide is based on acrylonitrile as raw material, adding initiator or catalyst, polymerization reaction as acrylamide aqueous solution, and then dried to make a finished product, adding different charge ions in the drying process, so as to produce polyacrylamide of different ion models.
Commodity index: The polyacrylamide commodity index was 82.89 on July 31, unchanged from yesterday and a record low in the cycle, down 22.63% from the highest point of 107.13 points on May 08, 2019. (Note: The cycle refers to 2019-04-01 to present)
Earlier we talked about the characteristics and uses of yellow powder polyaluminum chloride (PAC), and how to judge which content or which type of product is more suitable for which industries to use, I believe that after the previous discussion, many people will have a more or less understanding of this product, then perhaps some people will be interested in polyaluminum chloride, want to know more. Today, let's all understand the production method of this product and its working principle, so that you can have a deeper understanding of it and help you make better use of this product.
How to formulate polyacrylamide PAM into liquid, and its turbidity, decolorization, including the application of removing heavy metal ions, polyacrylamide PAM in the process of dosing and use, how to choose its dosage ratio through the situation of wastewater, which is very important. Under normal circumstances, wastewater is collected for small experiments to calculate the amount of polyacrylamide PAM.
How to correctly choose polyacrylamide (PAM) model is an old problem, a common problem, and a problem that is easy to choose wrong. Picked the wrong one? What's the harm? There is basically no big harm, that is, the cost is increased or the flocculation effect is not as it should be, and the treatment is not up to standard. Of course, regardless of the size of the hazard, whether it is a hazard or to be avoided, it is also important to correctly select the right polyacrylamide (PAM) model.
Cationic polyacrylamide is an important one of the four major ionization properties of polyacrylamide (other types are non-ionic, anionic and zwitterionic). Cationic polyacrylamide has good water solubility and high flocculation ability because of the high density positive charge on the macromolecular chain, so it has a wide range of applications in industrial sewage treatment, wastewater treatment, sludge decarburization water treatment. Ionic and anionic polyacrylamide has also been known as a water treatment agent for a long time. However, with the development of new technology of emulsion cationic polyacrylamide, as a water treatment agent, it is easy to stir, easy to dissipate, less dosage, convenient operation, and has begun to be valued.
The three important indicators of polyacrylamide are molecular weight, hydrolysis degree and solid content. There are three main indicators of cationic polyacrylamide, that is, ionization, solid content and molecular weight. The molecular weight of anionic polyacrylamide varies from 6 million to 22 million, and the ionization degree of cationic polyacrylamide varies from 20%-60%; Recently, many customers in different fields have reported that the effect of adding polyacrylamide is not good, and Yuanda Water Purification Materials suggests: choose the corresponding anion or cationic products according to the on-site sewage treatment process and equipment.
Cationic polyacrylamide is a water-soluble polymer with a positive charge in its solution, which can adsorb negatively charged substances, effectively flocculate suspended solids and colloids with high organic matter content, and can strengthen solid-liquid separation for desilting. Because it contains a variety of active groups, it can be reacted with a variety of substances in sewage to capture, adsorption, bridge. Cationic polyacrylamide has the functions of precipitation and turbidity removal, decolorization, bonding, and strengthening slurry water separation. Cationic polyacrylamide At present, domestic cationic polyacrylamide is mostly prepared by binary copolymerization or ternary copolymerization, and binary copolymerization is prepared by AM (acrylamide) and DAC (acryloyloxyethyltrimethyl
The more expensive the price of polyacrylamide, the better the effect, this is obviously wrong, so on the other hand, the better the effect of polyacrylamide, the more expensive the proposition is true? Let's discuss below: What determines the good or bad effect of polyacrylamide? The quality and badness of polyacrylamide need to be judged according to its use conditions, and when the role is different, the factors that determine its quality are also different. In the field of water treatment, when polyacrylamide acts as precipitation, its quality can be observed by observing the flocculation effect (huddle size), precipitation rate, water quality clarity, polyacrylamide amount used, polyacrylamide dissolution rate and whether it can meet the on-site make
Editor's note: On September 13, at the 2018 China International Petrochemical Conference, Li Shousheng, president of the China Petroleum and Chemical Industry Federation, delivered a keynote speech entitled "Jointly Create the Next Future of the Petrochemical Industry with Consumption Upgrading and Supply-Side Structural Reform". With his consent, Interface News has excerpted some of the content for industry discussion. Author: Li Shousheng, President of China Petroleum and Chemical Industry Federation, after 40 years of rapid development of reform and opening up, China's productivity has been greatly liberated and continuously improved, the contradiction between market supply and demand has shifted from insufficient supply to overall oversupply, and people have shifted from pursuing consumption quantity to pursuing consumption quality