In the extreme laboratory of Shandong Yuanlian Chemical, a sample of tetrasodium iminodisuccinate is undergoing rigorous testing—the temperature continues to rise to a 200°C environment, while the data curve on the chelation efficiency monitor remains steady.

In high-temperature industrial applications, when traditional chelating agents begin to decompose and fail at 80°C, EDTA completely deactivates at 100°C, and DTPA experiences a sharp decline in stability at 120°C, the tetrasodium iminodisuccinate (IDS) developed by Yuanlian Chemical demonstrates astonishing temperature resistance.

This new green chelating agent not only maintains over 90% structural stability under extreme conditions of 150°C but also addresses long-standing high-temperature chelation challenges in dozens of industrial scenarios, such as high-temperature bleaching in papermaking, thermal dyeing in textiles, and high-temperature water injection in oilfields.

01 Heat Resistance Principle: Molecular Structure Determines Performance Limits

The exceptional high-temperature stability of tetrasodium iminodisuccinate stems from its unique molecular design. Unlike the linear structure of EDTA, the IDS molecule adopts a cyclic coordination structure, where two succinic acid groups are bridged by an imino group, forming a thermodynamically stable five- and six-membered ring chelation system.

This special structure prevents molecular chain breakage under high-temperature conditions. Experimental data show that after 24 hours at 150°C and pH=10, the calcium ion chelation capacity of IDS decreases by only 7.3%, while traditional chelating agents lose over 60% of their performance under the same conditions.

From a chemical bond perspective, the C-N bond energy in the IDS molecule reaches 305 kJ/mol, significantly higher than the 347 kJ/mol of ordinary C-C bonds. This characteristic greatly enhances its resistance to free radical attacks at high temperatures.

At the microscopic level, the chelates formed by IDS and metal ions exhibit a unique “cage-like structure,” which is less prone to ligand dissociation under heat. Even under boiling aqueous conditions, the metal ion retention rate remains above 85%.

02 Performance Comparison: Temperature Tolerance Differences Between IDS and Traditional Chelating Agents

Data Source: Yuanlian Chemical Laboratory

The comparative data clearly show the significant performance advantages of Yuanlian Chemical’s IDS in high-temperature environments. Particularly in calcium ion chelation capacity, IDS maintains a value of 380 mg/g even at 150°C, which is 4.5 times that of EDTA. This difference is decisive in high-temperature water treatment systems.

03 High-Temperature Applications: Analysis of Four Major Industrial Scenarios

In high-temperature bleaching systems for the paper industry, hydrogen peroxide bleaching typically occurs at 95–110°C, where traditional chelating agents rapidly decompose. As a bleaching stabilizer, Yuanlian Chemical’s IDS not only withstands high temperatures but also effectively chelates transition metal ions, reducing hydrogen peroxide decomposition to below 0.5%, increasing whiteness by 2–3 points, and cutting chemical usage by 15–20%.

The high-temperature dyeing processes in the textile industry face even harsher conditions, with disperse dyeing often reaching 130–135°C. IDS remains stable under these conditions, effectively controlling interference from calcium and magnesium ions in dyeing, maintaining color difference ΔE within 0.8, increasing first-pass dyeing success rate to 98%, and reducing rework energy consumption by approximately 25%.

High-temperature water injection systems in petroleum extraction present extreme challenges for chelating agents, with downhole temperatures reaching 150–180°C and high salinity conditions. The high-temperature IDS product developed by Yuanlian Chemical for oilfields remains effective in these extreme environments, controlling scale formation with a long-term scale inhibition rate above 90%, extending cleaning cycles from 3 to 12 months.

For high-temperature chemical cleaning in industrial cleaning, processes often run at 80–95°C. Yuanlian Chemical’s IDS-based cleaning agents maintain activity at these temperatures, achieving a 99% removal rate for iron oxide scale, reducing cleaning time by 40%, and avoiding the inefficacy issues common with常温清洗剂 when heated.

04 Technological Breakthroughs: Yuanlian Chemical’s Three Innovative Processes

Yuanlian Chemical has pushed the high-temperature resistance of tetrasodium iminodisuccinate to new heights through three innovative processes:

1. Microwave-Assisted Synthesis Technology: Utilizing a 2450 MHz high-frequency microwave field improves reaction temperature uniformity by 70% and enhances molecular structure regularity, significantly increasing product thermal stability. Compared to traditional processes, high-temperature tolerance is increased by 15°C, with energy consumption reduced by 40%.

2. Molecular Framework Reinforcement Process: By introducing rigid group modification technology, heat-stable groups are incorporated at key positions in the IDS molecule, raising the decomposition temperature from 180°C to 220°C while preserving biodegradability.

3. Nano-Encapsulation Controlled-Release Technology: A silica nanocapsule coating system was developed, keeping IDS in a “dormant state” at room temperature and activating its release only in high-temperature environments. This extends high-temperature action duration by 3–5 times, making it particularly suitable for intermittent high-temperature processes.

Accelerated aging tests at Yuanlian Chemical’s laboratory show that after 1000 hours at 200°C, the optimized IDS product retains 87.2% of its active components, far exceeding the industry standard requirement of 70%.

05 Quality Assurance: Yuanlian Chemical’s End-to-End Quality Control System

Yuanlian Chemical has established a nine-level quality control system from raw materials to finished products, ensuring stable and reliable high-temperature performance for every batch of IDS.

• Raw Material Screening: Gas chromatography-mass spectrometry (GC-MS) is used to test raw material purity, with key materials required to be over 99.9% pure, guaranteeing molecular structure integrity from the source.

• Production Process: A DCS automated control system is implemented, with temperature control precision within ±0.5°C. Reaction endpoint determination has shifted from manual observation to online near-infrared monitoring, ensuring complete molecular synthesis.

• Finished Product Inspection: A high-temperature simulation test platform is employed. Every batch must pass a 150°C/24-hour accelerated aging test, with chelation value variation controlled within ±5%. Non-compliant products are automatically isolated.

Yuanlian Chemical’s IDS products have obtained SGS, ISO9001, and ISO14001 certifications, completed EU REACH pre-registration, and are exported to over 20 countries and regions including Germany, Japan, and South Korea, with more than 500 global high-temperature application cases.

If you are seeking chelating agent solutions capable of withstanding extreme high temperatures, please contact the Yuanlian Chemical technical team.

Phone: +8613345172159
Website: www.yuanlianchem.com

We offer free sample testing and custom technical solutions.