Hydrolyzed Polymaleic Anhydride (HPMA)
Hydrolyzed Polymaleic Anhydride (HPMA) is a low molecular weight polymeride with an average molecular weight of 400-800. It has no toxicity and is soluble in water, making it ideal for use as a water treatment chemical. HPMA forms a chelate with calcium and magnesium ions in water, allowing it to prevent scale formation and corrosion effectively. It is also non-carcinogenic and non-teratogenic, making it safe for many industries. HPMA is an effective antiscalant that can be used in various applications such as cooling systems, boilers, reverse osmosis systems, and more
CAS No. 26099-09-2
HPMA Structural Formula:
HPMA is a low molecular weight polymeride with an average molecular weight of 400-800, making it highly heat and chemically stable with a decomposition temperature above 330℃. This polymeride has an effective threshold effect under high temperatures (350℃) and high pH levels (8.3). It is well suited for alkaline water systems or built with agents.
HPMA offers excellent scale inhibition properties against carbonate and phosphate scales while remaining effective at temperatures up to 300℃ over extended periods (up to 100 hours). These features have made it popular in desalination plants, flash vaporization equipment, low-pressure boilers, steam locomotives, crude oil evaporation pipelines, and industrial cooling water systems. Moreover, HPMA has strong corrosion inhibition effects when used alongside zinc salts.
Finally, due to its versatile characteristics, HPMA can also be added as an additive to various products.
Hydrolyzed Polymaleic Anhydride Specification
|Appearance||Pale yellow to umber transparent liquid|
|Solid content %||50.0 min|
|Bromine value mg/g||50.0 max|
|pH(1% water solution)||2.0-3.0|
|Density (20℃) g/cm3||1.22-1.25|
HPMA is a chemical compound that protects and maintains the efficient functioning of circulating cool water systems, oilfield fill water, crude oil dewatering, and low-pressure boilers. This chemical must be used with organic phosphonate at a dosage between 1ppm to 15ppm for optimal efficiency. HPMA offers excellent scale inhibition of up to 98% and effective stripping of existing scale build up. It also provides superior carbon steel corrosion protection when combined with zinc salts.
Frequently Asked Questions
What is HPMA?
Hydrolyzed polymaleic anhydride (HPMA) is a water-soluble polymer that can be used as a flocculant, coagulant, and/or dispersant. It is produced by the hydrolysis of polymaleic anhydride in water.
What are the applications of HPMA?
HPMA can be used in a variety of industries, including water treatment, papermaking, mining, and oil drilling. It is commonly used as a flocculant to remove suspended solids from water, as a coagulant to remove color from paper pulp, and as a dispersant to prevent clumping in drilling muds.
What are the benefits of using HPMA?
There are many benefits to using HPMA, including its high efficiency, low toxicity, and biodegradability. Additionally, HPMA is not affected by pH changes and can be used over a wide range of temperatures.
Are there any drawbacks to using HPMA?
One potential drawback of using HPMA is that it can form insoluble complexes with certain metals, such as iron and aluminum. Additionally, HPMA may not be effective at removing certain types of contaminants from water, such as dissolved organic matter.
How does HPMA compare to other flocculants?
HPMA is more effective than most flocculants at removing suspended solids from water. It is also less toxic than most other flocculants and is biodegradable. However, HPMA is more expensive than most flocculants and may not effectively remove certain contaminants from water.
How does HPMA compare to other coagulants?
HPMA is more effective than other coagulants at removing color from paper pulp. Additionally, it has lower toxicity than most other coagulants and is biodegradable. However, HPMA is more expensive than most other coagulants and may not effectively remove certain contaminants from water.
How does HPMA compare to other dispersants?
HPMA is more effective than most other dispersants at preventing clumping in drilling muds. Additionally, it has a lower toxicity than most other dispersants and is biodegradable. However, HPMA is more expensive than most other dispersants and may not be effective at preventing clumping in all types of drilling muds