Water Treatment Chemicals

Ion exchange resins are engineered polymers that remove dissolved ions from water and process streams by swapping them for ions they already carry. Unlike a filter, they are not consumed in normal service – they are regenerated and used again, often for years. The engineering problem is therefore not “which resin removes the ion” but

Produced water, desalter effluent and oily wastewater all carry the same problem in different forms: oil droplets and fine solids stabilised by negative surface charge, refusing to separate no matter how long you give them. Cationic polyamine is one of the standard tools for breaking that stability – and one of the most commonly misapplied.

Recycled fibre brought a problem into the paper mill that virgin pulp never had: a load of dissolved and colloidal anionic material that eats cationic additives before they reach the fibre. Retention aids fail, sizing does not hold, and the wet end becomes unstable. The industry’s answer is a low-viscosity cationic polyamine used as an

Seven grades of the same product, all “polyamine, light yellow liquid”, differing only in solid content and viscosity. To a purchasing department they look like a reason to buy the cheapest. To a plant chemist they are a selection variable that decides whether the coagulation programme works at all. This guide is about choosing between

Polyamine is one of those water treatment chemicals that is easy to buy and hard to buy well. Two suppliers can both quote “polyamine, 50% solids” and deliver materials that behave completely differently in a plant – because the property that actually matters is not the solid content but the charge density, and charge density

Water treatment programmes rarely fail because the wrong chemical was chosen in isolation. They fail because the chemicals were chosen separately – a phosphonate here, a polymer there, a corrosion inhibitor added after the first complaint – and nobody checked how they interact at the doses actually used. This guide puts the four common scale

Open recirculating cooling systems concentrate everything that enters with the make-up water. At five cycles of concentration, a feedwater with 120 mg/L calcium hardness becomes 600 mg/L in the tower; at eight cycles it doubles again. Scale and fouling are therefore not accidents, they are the predictable result of an economic decision about how much

Every industrial water system runs two economies at once. The first is water and energy: fewer cycles of concentration means less water used but more pumping and heat loss. The second is deposit control: push the cycles up and the sparingly soluble salts in the water start to precipitate on heat transfer surfaces, and a

THPS vs Glutaraldehyde and Other Water-Treatment Biocides THPS (CAS 55566-30-8) is one of several biocides used in industrial water systems. This page compares it with the products it is most often considered alongside, so you can choose or combine correctly. The main water-treatment biocides Biocide CAS Type Key traits THPS 55566-30-8 Organophosphorus (non-oxidising) Broad-spectrum; water-soluble;

THPS for Oilfield and Industrial Water Treatment THPS (tetrakis(hydroxymethyl)phosphonium sulfate, CAS 55566-30-8) is a non-oxidising, broad-spectrum biocide used in oilfield water injection and industrial water systems. This page looks at where it is used and why a non-oxidising biocide matters. Why non-oxidising matters Oxidising biocides (chlorine, peroxide) are effective but can corrode metal, damage membranes