Electronic chemicals
Sulzer delivers precision purification solutions achieving ppm-ppb purity levels for semiconductor, pharmaceutical, and other specialty chemical manufacturers worldwide. From melt crystallization units to complete purification systems, we help you meet the most demanding specifications.

50+

35+

ppb

1000+

Years crystallization expertise

 Installations for electronic grade chemicals

 Purity level achieved

 deployed end-to-end-solutions
Sulzer is the global leader in electronic grade chemical purification, offering advanced crystallization technologies and integrated purification systems for applications requiring ppm-ppb contamination control. With over 40 years of experience in fractional melt crystallization, Sulzer's technology is at the core of 30+ installations for electronic grade chemicals and 10+ for semiconductor grade.

Chemical purification systems for every challenge
Optimization solutions Technology licencing Components End-to-end solutions

Application across advanced industries
Electronics

Electronics

Ultra-high purity chemicals for various electronic applications:

  • Battery manufacturing (LFP, NMC, electrolytes and solvents)
  • Photovoltaics (solar cells)
  • Display technologies (LCD, OLED, microLED fabrication)
  • Optoelectronics (LEDs, optical coatings)
  • Semiconductors (core / benchmark application) IC fabrication (logic, memory, 3D NAND, etc.)
  • Etching, cleaning, deposition processes
  • Ultra‑pure acids and solvents.
Pharmaceutical

Pharmaceuticals

High-purity solutions for regulated production

  • API (Active Pharmaceutical Ingredient) synthesis
  • Biopharmaceutical manufacturing
  • High-purity acids for PH control & buffering
  • Cleaning and sterilization processes (high-purity H₂O₂, acids, solvents)
  • Specialty excipients (high-purity carbonates, solvents, stabilizers)

 

Other specialty chemicals

Other specialty chemicals

Ultra-pure intermediates for performance materials

  • High-purity organic solvents (NMP)
  • Organometallic precursors
  • Amines and functional intermediates
  • Chlorinated intermediates

Melt crystallization technology:

where traditional separation technologies reach their limits

Our crystallization-based purification systems are able to separate, isomers, and heat-sensitive products While consuming less energy. These advanced separation solutions enable purity enhancement, contaminants removal and control, ion removal, and precise impurities segregation and accumulation making crystallization the optimal choice where traditional methods cannot reach.

 

Suspension crystallization
Compact layout with high separation efficiency even when starting with low feedstocks concentrations.


Static crystallization
A heat exchanger plate bundle that allows high purities and a versatile fully automated operation.


Falling film crystallization
Optimal for high-throughput applications and delivers the highest degree of purity.



Crystallization
purification, trees & river scene

Recycling of electronic chemicals

Recover contaminated streams and upgrade them into ultra‑high purity products. Our crystallization technologies enable efficient recycling with minimal energy use and no waste.


Less energy
low-temperature operation with no thermal degradation


Zero waste process
no solvents or chemical additives required


Resource recovery
back to specification-grade chemicals for reuse



Talk to an expert

Why choose Sulzer for specialty chemicals purification
engineers

Proven crystallization expertise
Over 40 years developing and deploying melt crystallization technologies with successful installations across every major chemical-producing region.

 

ppb-level contamination control
Demonstrated capability achieving parts-per-billion impurity control across 29+ controlled ions in electronic-grade applications, meeting the strictest semiconductor industry standards.

 

Complete solution portfolio
From individual crystallizers to complete purification trains, technology licensing to greenfield plant design—we deliver the right solution for your specific purity requirements.

 

Energy-efficient & sustainable
Solvent-free process, using electricity, with no waste byproduct and minimal environmental impact.


Related technologies
Static crystallizer
Static crystallization
Static crystallization is a process using vertical plates, heated or cooled by an internal circulation of heat transfer medium (HTM). The plates are suspended in the molten feed. Slow cooling of the HTM below the freezing point of the stagnant melt causes a layer of crystals to grow on the plates.
Suspension crystallization plant
Suspension crystallization
Besides static and falling film, suspension crystallization is an industrially used melt crystallization technology. The specific advantages of this technology include a compact layout, high purity in one step, low energy consumption, and low installation costs.
Falling film crystallizer elements
Falling film crystallization
Thanks to our satisfied customers, falling film crystallization is the leading melt crystallization technology for high-purity applications. We work with you to design a new plant that optimally meets your requirements.

Frequently asked questions about ultra high purity purification

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