2035 Hardness Process Analyzer

From Metrohm Process Analytics

Recently, the use of membranes has become extremely com-mon and has displaced old technologies of different industrial electrolysis processes, such as in chlorine production and wa-ter desalination. Therefore, brine purification has become an unavoidable step to preserve and extend the electrolysis. The level of impurities such as calcium and magnesium (known as hardness) is reduced in two treatment steps. After the secondary treatment with an ion exchange resin, impurity concentrations in brine can be reduced by a factor of 1000.

Hardness determination in this ultrapure brine is necessary to prevent damage downstream in the electrolysis process. Ca2+ and Mg2+ create pin holes in the membranes, causing a loss in current efficiency which leads to higher energy costs. The 2035 Hardness Process Analyzer from Metrohm Process Analytics is the ideal solution to measure hardness content in ultrapure brine.

About the hardness application

Ca2+ and Mg2+ form a colored complex with an indicator in alkaline environment. The colour intensity indicates the hardness level in the sample and can be measured at a wavelength of 620 nm, with a detection limit of µg/L.

Benefits for online analysis

Applications for Ca2+/Mg 2+

• Protect expensive company assets by monitoring your processes

• … in the outlet resin treatment in chlor-alkali

• Process data available at your fingertips 24/7 means no waiting for production / (chemical)

slow, manual laboratory methods

• … in polished brine prior electrolysis process /

• More reproducible results - No operator interference necessary (chemical)

• Faster results to improve process optimization

• Less labor and chemical consumption reduces overhead costs and increases profits

Ca2+/Mg2+analysis performed safely online

• Safe, rugged enclosure designed to IP66 specifications is ideal for process environments

• Upstream control of brine quality helps overcome costly membrane remediation procedures before fouling occurs

• Remote access and control via Ethernet and Modbus TCP/IP, with USB for data export

• Integrate additional measuring techniques (pH, conductivity)

• Customizable, user-friendly interface with several security levels 8.000.5339EN – 2020-04

For more information, visit our website: www.metrohm.com