Chlor-alkali solutions

At a glance

thyssenkrupp nucera has been active in the chlor-alkali sector throughout the world for more than 50 years and realized over 600 electrolysis projects worldwide. We have implemented projects from small facilities to huge chlor-alkali plants with capacities of over 800,000 mt/year of NaOH.

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Bipolar membrane (BM) single element technology

Our bipolar membrane (BM) 2.7v6 plus single element offers optimized design features and thus breaks the barrier of 1,980 kWh per metric ton of NaOH at 6kA/m². Highlights are an accessible active area of 2.85m² and a longer membrane life under high current density operation beyond 6 kA/m².

Bipolar ion-exchange membrane process electrolyzer (BiTAC)  

Our proven filter press bipolar ion-exchange membrane process electrolyzerBiTAC®, offers specific advantages, such as fast remembraning of the complete electrolyzer. The BiTAC family is being constantly improved and all generations are compatible, so existing plants can easily be upgraded to the latest developments. The latest generation, eBiTAC-v7, pushes energy consumption to a new record low of 1,979 kWh/t NaOH at 6 kA/m².

Oxygen-depolarized cathode electrolysis technology (ODC) 

Our NaCl-ODC (oxygen-depolarized cathodes) electrolysis technology is reliable and well-proven. It offers a higher degree of site flexibility with regard to electricity and hydrogen supplies.

Integrated process solutions 

At thyssenkrupp nucera we offer state-of-the-art products that feature engineering of the highest quality while taking economic, ecological and safety considerations into account. We offer solutions for the entire process, such as brine treatment, chlorine treatment, refrigerant free chlorine liquefaction or hypochlorite production.

Brine Treatment

Efficient brine treatment protects the

membranes in the electrolysis cells while

at the same time keeping both investment

costs and operational costs to a minimum.

Chlorine Treatment

The chlorine generated leaves the cells with the

depleted brine. If high-purity chlorine is required

(e.g. for a downstream VCM plant), hydrochloric

acid can be added to the feed brine to reduce the

oxygen content in the chlorine produced.

Refrigerant free chlorine liquefaction

Chlorine from membrane electrolysis cells contains

some oxygen which might be required to be reduced

for specific downstream use. The liquefaction of the

compressed chlorine is performed in one or two stages

in heat exchangers (condensers).

Hypochlorite production (optional)

Sodium hypochlorite (bleach) is one of the

commercial chemicals typically produced by

our standard unit. It is at the basis of the water

disinfection and cleaning industries, and is

produced by direct reaction between the chlorine

and caustic soda resulting from the electrolysis

process.

Brine Treatment

Efficient brine treatment protects the membranes in the electrolysis cells while at the same time keeping both investment costs and operational costs to a minimum.

 

Chlorine Treatment

The chlorine generated leaves the cells with the depleted brine. If high-purity chlorine is required (e.g. for a downstream VCM plant), hydrochloric acid can be added to the feed brine to reduce the oxygen content in the chlorine produced.

 

Refrigerant free chlorine liquefaction

Chlorine from membrane electrolysis cells contains some oxygen which might be required to be reduced for specific downstream use. The liquefaction of the compressed chlorine is performed in one or two stages in heat exchangers (condensers).

 

Hypochlorite production (optional)

Sodium hypochlorite (bleach) is one of the commercial chemicals typically produced by our standard unit. It is at the basis of the water disinfection and cleaning industries, and is produced by direct reaction between the chlorine and caustic soda resulting from the electrolysis process.

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Services along the product cycle

  • Feasibility studies / technology selection 
  • Project management 
  • Arrangement of financing schemes 
  • Financial Guidance based on an intimate knowledge of local laws, regulations and tax procedures 
  • Environmental studies 
  • Licensing, incl. basic / detail engineering 
  • Utilities / offsites / infrastructure 
  • Procurement / inspection / transportation services 
  • Civil works and erection 
  • Commissioning 
  • Training of operating personnel 
  • Plant operation support / plant maintenance 
  • Full service 
  • Long-term partnership 
  • Spare parts supply & management 
  • Upgrade and retrofit 
  • Revamps 
  • Digital plant monitoring and optimization (web-based evaluator and remote condition monitoring) 
  • Consulting 
  • Service center & field services 

Execution concepts

Compact cell-house design 

This largely standardized design is optimized to deliver low total investment costs, minimize space requirements and ensure easy maintenance. The cell house has no pits and the catholyte system is an integrated part of the design. 

Skid-mounted technology 

Skid-mounted chlorine plants have a capacity of 5,000 or 15,000 mt/a of Cland consist of standardized, pre-assembled modules in steel skids. Benefits: Lower cost, fewer civil and erection works on site and much faster project schedule than conventional plants.  

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