CAS No.26099-09-02 Hydrolyzed Polymaleic Anhydride

Hydrolyzed polymaleic anhydride (HPMA), a low-molecular-weight and high-efficiency scale inhibitor and dispersant, effectively prevents scale formation and removes existing scales. It dissolves in water to form an acidic solution.

CAS No.26099-09-02

HS: 2936199090
Appearance: Pale Yellow to Yellow Solution

EINECS: 607-861-7

I. Industrial Water Treatment Applications

1. Circulating Cooling Water Systems

Primary Functions：Inhibits the deposition of scale (e.g., calcium carbonate, calcium phosphate), disperses rust and suspended impurities, thus extending equipment service life.

Application Scenarios：Circulating water systems in steel plants, power plants, and chemical plants, especially suitable for high-hardness water (Ca²⁺+Mg²⁺ concentration > 300 mg/L).

Technical Advantages：Maintains stable scale inhibition efficiency under high temperature (≤150℃) and high pH (8.5-10), and enhances corrosion inhibition when compounded with zinc salts.

2. Boiler Water Treatment

Core Role：Prevents scale formation in boiler tubes, reduces thermal resistance, and avoids pipe explosion risks caused by scaling.

Typical Applications：Added during pretreatment and operation of utility boilers and industrial steam boilers, often blended with organic phosphonates.

II. Oil & Gas Industry

1. Oilfield Water Injection Scale Prevention

Mechanism：Chelates calcium and magnesium ions in water to prevent the deposition of scale (e.g., calcium sulfate, barium carbonate) in formation pores, maintaining water injection permeability.

Application Scenarios：Offshore oilfields and high-salinity water injection blocks, applicable for continuous tubing injection or downhole squeezing.

2. Drilling and Completion Operations

Drilling Fluid Treatment：Regulates drilling fluid rheology, inhibits shale hydration expansion, suitable for water-sensitive formations (e.g., shale with high montmorillonite content).

Acid Fracturing Additive：Acts as an iron ion chelating agent to prevent Fe³⁺ precipitation in acidizing fluids, improving formation fracture conductivity.

III. Textile and Dyeing Industry

1. Dyeing Water Softening

Functional Value：Chelates metal ions (e.g., Fe²⁺, Cu²⁺) in water to avoid color fastness degradation or color spots caused by dye-metal ion reactions.

Application Stages：Soft water preparation before dyeing and additive dosing during reactive dyeing.

2. Desizing and Scouring Processes

Key Function：Disperses sizing agents and impurities on fiber surfaces, improves fabric whiteness and wettability, often used in combination with surfactants.

200KG iron drum

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