Ultra-high-purity chemicals

Achieving electronic-grade purity and ppb-level impurity control

A practical technical article for producers of phosphoric acid, ethylene carbonate, sulfuric acid, NMP and other specialty chemicals targeting semiconductor, battery and pharmaceutical markets.

Melt crystallization for 9N ultra-high purity

PPB-level contamination control protocols

Reference routes for six key specialty chemicals

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Document language: English

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Ultra-high purity achievable with melt crystallization

PPB

Contamination control levels for semiconductor grade

Ultra trace

Analytics and sampling protocols covered

The challenge

The global shift toward electrification, advanced manufacturing and miniaturized electronics is increasing demand for chemicals that meet far tighter purity, consistency and contamination-control requirements than standard industrial applications.

Purity is no longer a quality parameter. It is a process variable that decides yield, device performance and qualification

Producers need new, reliable separation technologies and contamination control systems to stay competitive. This paper provides a first overview of what crystallization-based systems can do.

What is inside

electronic-grade-semiconductor-chip-cleanroom-ultra-high-purity-mockup

End-to-end guidance for electronic-grade production

The engineering and contamination-control system behind ultra trace levels in specialty chemicals. Based on three decades of Sulzer references globally.

The standards behind purity levels in specialty chemicals (SEMI, GB/T, IC grades)

Fractional melt crystallization: static and falling-film operating principles

Case study: phosphoric acid from food-grade feed to semiconductor grade

Reference routes for sulfuric acid, ethylene carbonate, NMP, TMA and H₂O₂

Materials, ultra-pure water dosing and contamination-free sampling protocols

Applications covered

We have helped hundreds of chemical producers achieve the tightest standards and reach their clients' most stringent specifications

Chemical	Target grade	Recommended routes
Phosphoric acid (H₃PO₄)	Semiconductor / E-grade	Unlock the paper to see routes
Sulfuric acid	Electronic grade	Unlock the paper to see routes
Ethylene carbonate	Battery grade	Unlock the paper to see routes
NMP	Recovery > 98 % + upgrade	Unlock the paper to see routes
Hydrogen peroxide (H₂O₂)	Electronic grade	Unlock the paper to see routes