Why It Matters
Recirculating cooling water concentrates CaCO3, CaSO4 and silica as it cycles up; without inhibition these precipitate on heat-exchanger tubes and fill slats. Design calls for sub-stoichiometric (threshold) phosphonate antiscalants plus a polymer dispersant
Solution Approach
Recirculating cooling water concentrates CaCO3, CaSO4 and silica as it cycles up; without inhibition these precipitate on heat-exchanger tubes and fill slats. Design calls for sub-stoichiometric (threshold) phosphonate antiscalants plus a polymer dispersant RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (6)
Hydroxyethylidene Diphosphonic Acid
CAS 2809-21-4
Phosphate Esters & Derivatives
Primary CaCO3 scale inhibitor
HEDP adsorbs onto nascent CaCO3 nuclei at sub-stoichiometric (threshold) dose, distorting crystal growth so scale stays dispersed; the workhorse cooling-tower antiscalant
Melting Point: 198-199 Boiling Point: 578.8 Solubility: 1.15e+01 g/L
Full Details
Amino Trimethylene Phosphonic Acid
CAS 6419-19-8
Phosphate Esters & Derivatives
Multi-functional phosphonate
ATMP gives strong CaCO3 threshold inhibition and chelates the trace Fe/Cu that catalyze scale and corrosion; broad pH tolerance for towers
Melting Point: 210 - 215 °C Solubility: 1000 mg/mL at 25 °C Vapor Pressure: 0.0000001
Full Details
DTPMPA (Diethylenetriamine Penta(methylenephosphonic acid))
CAS 15827-60-8
Phosphate Esters & Derivatives
High-temperature phosphonate
High charge density and superior high-temperature stability make DTPMPA effective at the elevated skin temperatures and high cycles where HEDP/ATMP weaken
Physical Description: Solid; 49-51% Aqueous solution: Clear amber to …
Full Details
Phosphonobutane Tricarboxylic Acid
CAS 37971-36-1
Phosphate Esters & Derivatives
Chelation / Sequestration
PBTC tolerates free chlorine and high calcium far better than aminophosphonates, so it survives oxidizing-biocide programs without losing inhibition
Full Details
Polyacrylic Acid Sodium (PAAS)
CAS 9003-04-7
Polymers & Resins
Conditioning
Low-MW polyacrylate disperses precipitated CaCO3 and silt and prevents phosphonate-calcium (Ca-phosphonate) deposits, completing the phosphonate/polymer program
Full Details
HPAA (2-Hydroxyphosphonoacetic Acid)
CAS 23783-26-8
Phosphate Esters & Derivatives
Chelation / Sequestration
HPAA combines scale-threshold action with mild ferrous-corrosion inhibition and good chlorine stability, useful in high-hardness, oxidizer-dosed towers
Physical Description: Brown liquid. Slight acrid odor
Full Details