Boric acid, as an essential basic chemical raw material, plays a critical role in sectors such as new energy batteries, high-end electronic glass and pharmaceutical intermediates. The purity of boric acid directly determines its value and performance in downstream applications. Consequently, achieving efficient and economical separation and purification of boric acid has become a core focus for many production enterprises.

Solvent Extraction Method: The Mainstream Pathway for Boric Acid Purification

Among various purification techniques, solvent extraction method has become widely adopted due to its mature technology, operational flexibility, and excellent separation performance. It is extensively used for boron recovery from salt lake brines, boric acid recovery from boron-magnesium tailings leachate, and refining industrial boric acid. The core principle involves selectively transferring boric acid from the aqueous phase to the organic phase using a suitable extractant, thereby achieving efficient separation from impurity ions. However, while the theory is straightforward, practical implementation often faces significant challenges.

Pain Points of Traditional Extraction Equipment: Low Efficiency, Emulsification, and High Losses

For many years, enterprises have relied on traditional equipment such as mixer settlers and extraction columns, using gravity settling to separate the two phases. These equipment show several limitations when dealing with high-salinity, complex brines that are prone to emulsification:

Low Separation Efficiency: Gravity settling is slow, resulting in long processing cycles. Equipment tends to be large, limiting unit capacity.
Severe Emulsification: In high-salinity, high-suspension systems, phase interfaces are hard to define. Thick emulsified layers cause serious entrainment and extractant loss.
High Solvent Consumption: Emulsification leads to significant organic phase carryover and difficult recovery, greatly increasing extractant consumption and operational costs.
Poor Adaptability: Traditional equipment cannot flexibly adjust mixing intensity according to changes in feed characteristics, resulting in a narrow process window.

These issues directly reduce boric acid extraction yield and product purity, while increasing production costs and environmental pressures.

Technological Innovation: How the CWL-M Centrifugal Extractor Solves Boric Acid Extraction Challenges

To address the limitations of traditional equipment in boric acid extraction, Zhengzhou Tiei Extraction has independently developed the CWL-M series centrifugal extractor. By introducing centrifugal force fields into the liquid–liquid extraction process and achieving technological breakthroughs in several critical stages, the CWL-M centrifugal extractor provides a completely new approach for efficient boric acid purification.

1.Power-Free Premixing + Small-Gap Mixing, Reduced Energy Consumption and Emulsification
The CWL-M centrifugal extractor utilizes a premixing track and evenly distributed feed blades, allowing materials to undergo initial contact and distribution before entering the drum without additional power. This reduces basic energy consumption by 40%. Meanwhile, small-gap mixing technology significantly lowers shear intensity, reducing emulsification by 90%. This effectively addresses the emulsification challenges of high-salinity systems and minimizes extractant entrainment losses.
2.Modular Multi-Stage Mixing, Precisely Tailored for Boric Acid Extraction
Boric acid feed solutions from different sources—such as salt lake brine, ore leachate, or industrial boric acid solutions—have distinct requirements for mixing intensity. The CWL-M series centrifugal extractor offers three modes: weak, standard, and strong mixing. These can be flexibly selected based on material viscosity, interfacial tension, and extractant properties, ensuring an optimal balance between extraction efficiency and phase separation, while avoiding over- or under-mixing.
3.High-Efficiency Separation Unit + Modular Separation Drum, Enhanced Phase Purity
Equipped with a modular separation drum and high-efficiency inlet/outlet units, the CWL-M centrifugal extractor reduces two-phase separation time from tens of minutes under gravity settling to just a few seconds under high centrifugal force. Post-separation entrainment is minimal, significantly increasing organic phase recovery. This not only lowers extractant consumption but also improves boric acid product purity.
4.Top-Suspended Structure + Fluoropolymer Body, Eliminates Corrosion and Leakage
Corrosion caused by brine and acidic leachates has long been a major issue. The CWL-M centrifugal extractor features a top-suspended design, eliminating bottom bearings and mechanical seals, thus completely preventing the common shaft seal leaks of traditional equipment. The main body is made of high-performance fluoropolymer composites, offering resistance to strong acids, high salinity, and corrosion. This extends service life and significantly reduces maintenance costs.

Practical Applications of the CWL-M Centrifugal Extractor in Boric Acid Extraction

Currently, the CWL-M series of centrifugal extractors has been successfully applied in numerous projects involving boron extraction from salt lakes, the comprehensive utilization of boromagnesite ores, and the refining of industrial boric acid. Actual operational data demonstrate:

Boric acid extraction rates consistently above 95%.
Organic phase entrainment reduced to less than 1/5 of traditional processes.
Continuous operation cycles extended more than threefold.
Overall operating costs reduced by 30%–50%.

Boric acid extraction and purification should no longer be constrained by the inefficiencies, emulsification issues, and corrosion problems of traditional equipment. The CWL-M series centrifugal extractor, through enhanced centrifugal mass transfer and separation, modular design, and corrosion-resistant material upgrades, offers the boric acid industry a high-efficiency, low-emulsification, low-loss, and easy-to-maintain solution.

If you are struggling with low extraction efficiency, high extractant consumption, or severe equipment corrosion, contact Zhengzhou Tiei Extraction. We provide a one-stop service, tailored to your specific feed material, ranging from laboratory testing to full-scale industrial equipment solutions.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820