Hydrolyzed Polymaleic Anhydride (HPMA)
Hydrolyzed Polymaleic Anhydride (HPMA)
Antiscalant
Antiscalant for Calcium Carbonate Control in High LSI Conditions
EC / List no.: 607-861-7
CAS no.: 26099-09-2
Hydrolyzed Polymaleic Anhydride = HPMA = Polymaleic Acid = PMA = Aqueous Solution of Polymaleic Acid = Homopolymer of Maleic Acid
Substance names and other identifiers
Regulatory process names: 2-Butenedioic acid (2Z)-, homopolymer
IUPAC names
(2R,3R)-2,3-dimethylbutanedioic acid
2-Butenedioic acid (2Z)-, homopolymer
ACIDO POLIMALEICO
Hydrolyzed Polymaleic Anhydride
Poly(maleic acid)
Polymaleic Acid
Homopolymer of Maleic Acid
Polymaleic Acid (PMA)
Other names
HPMA
Hydrolyzed Polymaleic Anhydride
Hydrolyzed Polymaleic Anhydride (HPMA)
Homopolymer of Maleic Acid
General Product Information
Hydrolyzed Polymaleic Anhydride (HPMA) has been developed as a calcium carbonate inhibitor in industrial water systems and other related applications.
Description
Hydrolyzed Polymaleic Anhydride (HPMA) is the most effective calcium carbonate antiscalant for high hardness, high alkalinity, and high temperature cooling water systems, in the industry.
Application
Hydrolyzed Polymaleic Anhydride (HPMA) provides the formulator:
– Superior calcium carbonate scale inhibition in severe service conditions, where the LSI approaches 3.0
– Both threshold inhibition and crystal modification
– Better results for phosphonate based programs than when phosphonates used alone
– Easy on-site testing using Bel-Trak test kit
Benefits
Hydrolyzed Polymaleic Anhydride (HPMA) is suitable for Scale control in sugar evaporators
Hydrolyzed Polymaleic Anhydride (HPMA) is compatible with all organic cooling water programs
Hydrolyzed Polymaleic Anhydride (HPMA) has excellent calcium carbonate crystal dictortion results in non-adherent crystals.
Hydrolyzed Polymaleic Anhydride (HPMA) maintains clean heat exchangers even in high calcium waters.
Hydrolyzed Polymaleic Anhydride (HPMA) can be used as a stand-alone calcium carbonate inhibitor or as a multifunctional formulation support agent in cooling water formulations and other related applications.
Hydrolyzed Polymaleic Anhydride (HPMA) is FDA approved (173.310, 173.45) for sugar and beet processing.
Hydrolyzed Polymaleic Anhydride (HPMA) is Kosher certified.
Polymaleic Acid (PMA) = Hydrolyzed Polymaleic Anhydride (HPMA)
CAS No. 26099-09-2
Molecular Weight: About 1000
Molecular Formula & Molecular Structure:
Properties:
HPMA is a solvent-based poly-maleic acid, with obvious threshold inhibition and crystal modification, and average molecular weight around 1000.
HPMA is the superior calcium carbonate inhibitor in high hardness, high alkalinity, and high temperature severe water conditions and a multifunctional formulation support agent in industrial water systems and other related applications.
HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cooling water systems.
HPMA has better performance when combined with phosphonates than when phosphonates used alone.
HPMA is compatible with organic phosphonic and quaternary ammonium compounds, while not affected by chlorine or other oxidizing biocides under normal use conditions.
HPMA has no toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330℃.
HPMA has obvious threshold effect under high temperature (350℃) and high pH（8.3）level, suitable to be used in alkaline water system or built with agents.
HPMA has good scale inhibition against carbonate and phosphate scales under temperature 300℃ with effective time as long as 100 hours.
Due to its good scale inhibition and high temperature tolerance properties, HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems.
In addition, HPMA has good corrosion inhibition effect when used together with zinc salt.
HPMA can also used as additives for cement.
Typical physical properties
Appearance : Clear amber liquid
Odours: light
Solids content: 47-53 % w/w
Specific gravity: 1.16-1.19
pH (undiluted): <2
Viscosity at 25°C: 12-30 cPs (10-25 cSt)
Boiling point range: 100-102°C (212-214°F)
Freeze point range: -5 to -12°C (23-10°F)
Solubility in water: miscible
ethylene glycol: miscible
methanol: Miscible
50% caustic soda: Readily neutralised with the evolution of heat
steam volatility: does not steam distil
pH limitations: to avoid precipitation, formulate below pH 2.5 or above pH 8.0. At in use concentrations Belclene 200is stable at any pH.
Thermal stability (TGA)
Thermogravimetric analysis has shown that Belclene 200is stable up a temperature of 300°C (572°F).
Chemical reactivity/compatibility
Hydrolyzed Polymaleic Anhydride (HPMA)is not affected by chlorine or other oxidising biocides under normal use conditions.
Test for compatibility with long chain nitrogen compounds, aliphaticamine and quaternary ammonium compounds
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Product Chemistry Usage Features
Belclene 200
Maleic homopolymer (PMA)
Excellent calcium carbonate control
Number one antiscalant for severe conditions
Belclene 283
Maleic terpolymer (MTP)
Zinc & phosphonate enhancement & calcium carbonate scale Inhibition
Cooling water and kraft pulp continuous digesters
Belclene 400
Sulphonated phosphino polycarboxylic acid polymer (PCA)
Phosphate scale inhibition & dispersion
High performance silt dispersant
Belclene 440
Phosphono polycarboxylic acid polymer (POCA)
Polymeric scale & corrosion inhibition
Multifunctional building block polymer
Belclene 110
Carboxylic acid based polymer
Calcium carbonate scale inhibition
High performance polyacrylate replacement
Belclene 627
Tetra phosphonate
Scale & metal ion control
Excellent calcium sulfate inhibitor
Belclene 630
Penta phosphonate
Scale & metal ion control
Excellent metal ion sequestration properties
Belclene 633
Penta phosphonate sodium salt
Scale & metal ion control
Excellent metal ion sequestration properties
Belclene 635
Penta phosphonate sodium salt
Scale & metal ion control
Excellent metal ion sequestration properties
Belclene 640
ATMP
Calcium carbonate inhibition for scale & corrosion control
Non-halogenated systems
Belclene 650
PBTC
Calcium carbonate scale inhibition
Halogenated systems and highly alkaline waters
Belclene 660
HEDP
Calcium carbonate scale inhibition
Moderately alkaline waters
Belclene 800
Maleic homopolymer (PMA)
Excellent calcium carbonate control
Biodegradable and phosphorus free
Belclene 810
PCA
Calcium carbonate control
Biodegradable and phosphorus free
Belsperse 161
Phosphinocarboxylic acid polymer (PCA)
Boiler sludge and iron dispersant
FDA approved
Belsperse 164
Phosphinocarboxylic acid polymer (PCA)
Boiler sludge and iron dispersant
FDA approved
DOW
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DOW
Acumer 3100 AA/AMPS non-ionic terpolymer •
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Acumer 5000 Carboxylate/Sulphonate/maleic terpolymer • •
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Acumer 9400 Acrylic Acid homopolymer •
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Acusol 445 Acrylic acid homopolymer •
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AkzoNobel
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AkzoNobel
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AkzoNobel
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Aquatreat AR 980 AA/MA copolymer •
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Aquatreat Versa TL-4 Sulphonated styrene/maleic poly- mer •
Belsperse 161 Phosphino Carboxylic Acid 50% •
Hydrolyzed Polymaleic Anhydride (HPMA)Poly maleic acid (HPMA) •
Belclene 283 AA/MA Copolymer (CPMA) •
Belclene 400 Sulphonated phosphino carboxylic acid copolymer •
Belclene 499 Carboxylate/sulphonate/maleic terpolymer •
Buckman BSI 75 AA/acrylamide copolymer •
Buckman BSI 82 AA/acrylamide copolymer •
Buckman BSI 84 AA/acrylamide copolymer •
Buckman BSI 88 AA/homopolymer •
Buckman BSI 97 Poly maleic acid •
DOW
Optidose 4210 Poly maleic acid