Category: Work

Chemical Properties of Hexamethylenediaminetetra(methylenephosphonic acid) (HMDTMPA)

October 16, 2026 admin No Comments

Hexamethylenediaminetetra(methylenephosphonic acid), commonly abbreviated as HMDTMPA or HDTMPA, is an organophosphonic acid with strong chelating and scale-inhibiting properties. Its chemical behavior is defined by its four phosphonic acid groups, high polarity, and strong affinity for metal cations. Key Chemical Properties Acidic Nature HMDTMPA is a strong acid. Its predicted pKa value is approximately 0.70, and…

Work

Quality Standard for 2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTC)

October 14, 2026 admin No Comments

The quality standard for 2-Phosphonobutane-1,2,4-Tricarboxylic Acid (PBTC) in China is defined by the chemical industry standard HG/T 3662-2010. Primary Standard: HG/T 3662-2010 This standard, titled “Water treatment chemicals — 2-Phosphonobutane-1,2,4-tricarboxylic acid”, is the currently effective version, having replaced the older HG/T 3662-2000 . It specifies the requirements, test methods, inspection rules, and packaging for PBTC,…

Work

The working principle of N,N-Diethylhydroxylamine (DEHA)

October 13, 2026 admin No Comments

N,N-Diethylhydroxylamine (DEHA) functions primarily as an oxygen scavenger and metal passivator in boiler water systems. Its working principle involves two key mechanisms: chemical reduction of dissolved oxygen and formation of a protective oxide film on metal surfaces. Oxygen Scavenging Mechanism DEHA reacts directly with dissolved oxygen in water, reducing it to harmless products. The overall…

Work

Application Principle of Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer (T-225)

October 12, 2026 admin No Comments

Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer (T-225) operates primarily through strong adsorption onto crystal surfaces and subsequent dispersion of insoluble particles, with its hydroxypropyl groups providing enhanced affinity for calcium phosphate scales that simple polyacrylates cannot match. Core Working Mechanisms 1. Crystal Surface Adsorption via Non-Bonding Interactions Molecular dynamics simulations reveal that T-225 binds to calcium phosphate…

Work

Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMPA)

October 6, 2026 admin No Comments

Diethylene Triamine Penta (Methylene Phosphonic Acid) (DTPMPA) is typically supplied as a 50% aqueous solution in dark brown or reddish-brown liquid form. It is packaged in containers ranging from small laboratory bottles to large industrial bulk containers. Typical Packaging Options Scale Container Type Common Sizes Notes Laboratory / Small Scale Plastic bottle 100 mL, 500…

Work

Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer (T-225)

October 3, 2026October 3, 2026 admin No Comments

While Acrylic Acid-2-Hydroxypropyl Acrylate Copolymer (T-225) is widely used as a scale inhibitor and dispersant in industrial water treatment, it has several notable disadvantages and limitations. Performance Limitations Moderate Scale Inhibition Efficiency Independent testing has shown that T-225 (acrylic acid-hydroxypropyl acrylate copolymer) exhibits only moderate threshold inhibition performance. In one comparative study, it yielded a…

Work

What is Ethylene Diamine Tetra (Methylene Phosphonic Acid) Sodium Salt (EDTMPS)

October 1, 2026October 1, 2026 admin No Comments

EDTMPS is the sodium salt form of EDTMPA (Ethylene Diamine Tetra (Methylene Phosphonic Acid)). It is a widely used organophosphonate-based water treatment chemical, primarily functioning as a scale inhibitor and corrosion inhibitor. Key Characteristics Appearance: Light yellow to yellow-brown transparent liquid, fully miscible with water. Chemical nature: An organophosphonate with multiple phosphonic acid groups, typically…

Work

Advantages and Disadvantages of 2-Phosphonobutane-1,2,4-Tricarboxylic Acid, Sodium Salt (PBTC.Na4)

September 29, 2026 admin No Comments

Core Conclusion: PBTC·Na4 is a high-performance, hydrolysis-stable scale inhibitor with excellent calcium tolerance and chlorine/bromine resistance, widely used in industrial water treatment. Its main disadvantages are low biodegradability, moderate aquatic toxicity, and acidic/corrosive properties in concentrated form. Advantages Excellent Scale Inhibition Performance: PBTC is highly effective against calcium carbonate scale, functioning as a “workhorse” inhibitor…

Work

Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid Copolymer (AA/AMPS) Introduction

September 28, 2026 admin No Comments

Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid Copolymer (AA/AMPS) is a water-soluble polycarboxylic antiscalant and dispersant synthesized by copolymerizing acrylic acid (AA) with 2-acrylamido-2-methylpropane sulfonic acid (AMPS). Its molecular structure combines the scale-inhibiting carboxyl groups from acrylic acid with the strongly polar sulfonic acid groups from AMPS. Key Properties and Mechanism Dual Functional Groups: The carboxyl groups provide…

Work

Which ions does the disodium salt of 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP·Na2) act upon?

September 24, 2026 admin No Comments

HEDP·Na₂ (disodium salt of 1-hydroxyethylidene-1,1-diphosphonic acid) acts upon a broad range of metal ions, with a particularly strong affinity for calcium. Primary Target Ions Calcium (Ca²⁺): This is the ion HEDP·Na₂ most notably targets. It forms stable six-membered ring chelates with calcium ions in water systems, which is the basis for its excellent scale inhibition…

Work