Welcome to the BTL New Material Case Study gallery. Since 2020, we have been a leading Chinese supplier of high-purity manganese compounds. This section showcases our expertise in solving complex chemical challenges across the water treatment, battery manufacturing, and pharmaceutical industries. Discover how our customized Manganese Dioxide (MnO₂), Manganese Carbonate (MnCO₃), and Manganese Sand help global clients achieve superior performance and cost-efficiency.

• Client Profile
  • A leading specialty chemical manufacturer based in France.
  • Specializing in high-end pharmaceutical intermediates and complex organic synthesis.
• The Challenge
  • High Material Loading: The existing process required a large excess of technical-grade MnO₂ (approximately 13 equivalents).
  • Reproducibility Issues: Variations in surface area and impurity profiles of standard grades led to inconsistent reaction kinetics.
  • Operational Inefficiency: High loading increased solid waste generation, filtration time, and overall production costs.
• Our Solution
  • High-Purity Material: Supplied Activated Manganese Dioxide with an assay of ≥ 99.0%.
  • Amorphous Structure: Recommended amorphous MnO₂ to provide a higher density of lattice defects for enhanced surface reactivity.
  • Dual-Grade Strategy: Provided two particle size options for High Throughput Experimentation (HTE): Grade A (D50 ≈ 2 μm) for maximum activity and Grade B (D50 ≈ 6 μm) for better filtration.
• Technical & Purity Advantages
  • Strict Impurity Control: Limited iron content to Fe ≤ 400 ppm and strictly controlled alkali/alkaline earth metals.
  • Optimized Kinetics: The amorphous morphology was specifically selected to accelerate the dehydrogenation pathway under toluene reflux.
• The Result
  • Successful Scale-up: The project transitioned from laboratory screening to industrial collaboration with an initial 1-ton trial order.
  • Improved Atom Economy: Achieved the R&D objective of significantly reducing MnO₂ equivalents (loading).
  • Enhanced Process Stability: Provided consistent material morphology, ensuring reproducible results for large-scale manufacturing.

• View Full Technical Blog

Client Profile

A multinational specialty liquid fertilizer manufacturer headquartered in Australia, with operational presence in North America and East Africa.

The client develops advanced micronutrient formulations requiring highly controlled manganese input materials to ensure dispersion stability, reactivity consistency, and batch reproducibility across international production sites.

The Challenge

Extreme Specification Requirement

The client required simultaneous compliance with:

Mn ≥ 44.0%
Particle Size ≥ 300 mesh
Passing Rate ≥ 99%

While each parameter is achievable individually, achieving all three concurrently presents a significant materials engineering challenge.

Structural Density vs. Grindability Conflict

High-manganese manganese carbonate naturally forms a dense crystalline morphology.

This results in:

Higher hardness
Reduced friability
Limited ultra-fine grindability

Most suppliers attempting aggressive fine grinding encounter:

Reduction in Mn assay
Unstable passing rate
Excessive dust formation
Significant yield loss
Batch-to-batch inconsistency

The client’s laboratory validation of initial samples indicated the material was “too coarse,” confirming the practical difficulty of ultra-fine classification at high Mn levels.

Supply Chain Instability

The client had previously evaluated multiple suppliers.

Common failure patterns included:

Inability to maintain Mn ≥ 44% after fine grinding
Passing rate below 99%
Inconsistent PSD distribution in scaled batches

The project required not only technical capability but industrial-scale repeatability.

Our Solution

We repositioned the requirement from standard supply to precision-engineered customization.

Secondary Ultra-Fine Processing Strategy

To achieve 300 mesh at 99% pass rate while maintaining Mn ≥ 44%, we implemented:

Dedicated secondary ultra-fine grinding at a specialized facility
Multi-stage air classification
Strict PSD verification per batch
Manual process monitoring during screening

Yield-Control Engineering

Achieving 99% pass rate required acceptance of over 10% material loss during classification.

For a 10-ton production lot, approximately 1 ton was separated to guarantee compliance.

This deliberate yield sacrifice ensured:

Stable particle size distribution
High reproducibility
Compliance with specification tolerance

Chemistry Preservation Protocol

Grinding intensity was carefully controlled to prevent:

Surface degradation
Excessive structural stress
Potential Mn content fluctuation

The final material preserved Mn ≥ 44.0% while meeting the ultra-fine specification.

Technical & Quality Advantages

Simultaneous Parameter Control

Successfully maintained:

High Mn assay
Ultra-fine particle size
High passing rate

without compromising chemical integrity.

Process Transparency

The client was provided with:

Clear explanation of structural limitations
Cost breakdown linked to processing complexity
Open discussion of yield impact

This engineering transparency strengthened collaboration trust.

Industrial Repeatability

Production design ensured scalability beyond laboratory validation.

The solution was not experimental — it was industrially executable.

The Result

Successful Production Batch
Delivered manganese carbonate meeting:

Mn ≥ 44.0%
Particle size ≥ 300 mesh
Passing rate ≥ 99%

Resolution of “Too Coarse” Issue
Laboratory validation confirmed elimination of dispersion concerns.

10-Ton Commercial Order Secured
Client confirmed initial customized order following technical validation.

Strategic Supply Partnership Established
Positioned as a technically capable supplier for high-specification agricultural-grade manganese carbonate.

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