Choose metatitanic acid filter cake when your process already operates in an aqueous or slurry-based system, your facility can handle wet bulk materials, and additional drying is unnecessary.
Choose metatitanic acid powder when you require dry dosing, smaller packaging, higher TiO₂-equivalent content per unit mass, or convenient integration into solid-state mixing and precursor synthesis.
The powder is not automatically “purer” simply because it contains more TiO₂. According to Inter-China Chemical’s current technical data sheets, both forms have the same listed values for sulfate and key metallic impurities. Their most important differences are physical form, volatile matter, TiO₂-equivalent concentration, packaging and intended application route.
What Is the Difference Between Metatitanic Acid Powder and Filter Cake?
Metatitanic acid is a hydrated titanium oxide intermediate used as a titanium-bearing precursor in downstream chemical and material-production processes.
Commercially, it may be supplied in two principal forms:
- Filter cake: a wet, mechanically dewatered material with relatively high volatile matter
- Powder: a more concentrated, lower-volatile solid suitable for dry handling and dosing
Both products provide titanium in a reactive intermediate form. However, they interact differently with storage systems, feeding equipment, mixers, reactors and downstream mass-balance calculations.
This means the correct grade should be selected according to the customer’s process—not simply according to which product has the higher reported TiO₂ percentage.
Technical Comparison at a Glance
| Parameter | Metatitanic Acid Filter Cake | Metatitanic Acid Powder |
|---|---|---|
| TiO₂ content | 50.2% | 68.7% |
| Matter volatile at 105°C | 42.5% | 24.0% |
| SO₄²⁻ | 7.0% | 7.0% |
| Fe | 0.0003% | 0.0003% |
| Al | 0.0029% | 0.0029% |
| Si | Not detected | Not detected |
| K | 0.0037% | 0.0037% |
| Ca | 0.0061% | 0.0061% |
| pH | 2.4 | 2.2 |
| Standard packaging | 500 kg or 1,000 kg per bag | 25 kg per bag or customized |
| Typical process format | Wet or slurry-based processing | Dry dosing or solid formulation |
The figures above are taken from the current one-page Inter-China Chemical technical data sheets for metatitanic acid filter cake and powder.
1. TiO₂ Content and Active Titanium Input
The most visible difference between the two grades is their reported TiO₂ content:
- Filter cake: 50.2% TiO₂
- Powder: 68.7% TiO₂
This means that, on a gross material-mass basis, the powder delivers more TiO₂-equivalent material per kilogram.
For example:
- 1,000 kg of filter cake contains approximately 502 kg of TiO₂ equivalent
- 1,000 kg of powder contains approximately 687 kg of TiO₂ equivalent
This difference matters when calculating:
- Titanium input per batch
- Lithium-to-titanium molar ratios
- Reactor solids loading
- Packaging requirements
- Transported mass
- Storage capacity
- Final formulation consistency
However, buyers should avoid comparing the two products purely on a price-per-kilogram basis. A commercially meaningful comparison should be based on:
Cost per kilogram of TiO₂ equivalent delivered into the process
A lower nominal price per kilogram may not represent a lower cost per unit of active titanium.
2. Matter Volatile at 105°C
The filter cake specification lists 42.5% matter volatile at 105°C, while the powder specification lists 24.0%.
This parameter should not automatically be interpreted as free water alone. For hydrated titanium intermediates, material lost at 105°C may include physically retained water and other volatile components associated with the hydrated structure and processing history.
Nevertheless, the difference has clear practical implications.
Higher volatile matter in filter cake may result in:
- Lower TiO₂-equivalent input per kilogram
- Higher wet-material volume
- Greater transport mass for the same titanium input
- Additional water entering the downstream formulation
- Reduced need to re-slurry the material in an aqueous process
Lower volatile matter in powder may result in:
- Higher solids concentration per kilogram
- More compact storage and shipping
- Easier dry-material mass balancing
- Lower water input into solid-state formulations
- Additional dust-control requirements during handling
The preferred condition depends on whether water is useful, neutral or undesirable in the customer’s process.
3. Impurity Levels: Is Powder Actually Purer?
Not necessarily.
The current technical data sheets list the same values for several important impurity parameters in both grades:
| Impurity | Filter Cake | Powder |
|---|---|---|
| Fe | 0.0003% | 0.0003% |
| Al | 0.0029% | 0.0029% |
| Si | Not detected | Not detected |
| K | 0.0037% | 0.0037% |
| Ca | 0.0061% | 0.0061% |
| SO₄²⁻ | 7.0% | 7.0% |
Therefore, the higher TiO₂ percentage of the powder should principally be understood as a difference in concentration and volatile matter—not evidence that the powder necessarily has lower listed metallic impurity levels.
This distinction is important for customers producing:
- High-purity titanium dioxide
- Lithium titanate
- Lithium adsorbent precursors
- Electronic or functional ceramics
- Titanium-containing specialty chemicals
For such applications, buyers should evaluate the actual impurity specification rather than relying on general terms such as “powder,” “dry grade” or “high TiO₂.”
4. Sulfate Content and Acidity
Both grades list 7.0% SO₄²⁻, while their pH values are:
- Filter cake: pH 2.4
- Powder: pH 2.2
The difference in listed pH is relatively small. Both products should be treated as acidic titanium intermediates rather than neutral finished powders.
Customers should therefore assess:
- Equipment material compatibility
- Corrosion-control requirements
- Downstream neutralization
- Washing requirements
- Lithium-source consumption
- Calcination and off-gas conditions
- Sulfate limits in the finished product
A dry powder may be easier to weigh, but this does not eliminate the need to account for acidity and residual sulfate in the downstream chemistry.
When Should You Choose Metatitanic Acid Filter Cake?
Filter cake is generally the more logical option when the downstream plant already uses water, slurry preparation or wet chemical processing.
Filter cake may be suitable when:
The process begins with slurry preparation
When the titanium precursor will immediately be dispersed in water, filter cake can enter the process without first converting a dry material back into a slurry.
This may reduce:
- Powder unloading
- Dust generation
- Dry feeding
- Re-wetting
- Initial dispersion steps
The plant operates at industrial bulk scale
The current filter cake TDS lists standard packaging of:
- 500 kg per bag
- 1,000 kg per bag
This packaging format is more appropriate for industrial plants equipped with bulk-bag lifting, unloading and wet-material feeding systems.
Additional water does not disrupt the process
Filter cake brings a larger volatile fraction into the formulation. This may be acceptable—or beneficial—when water is already part of the process.
The application is high-purity TiO₂ production
The filter cake TDS identifies high-purity titanium dioxide production as a principal application. It also lists titanium chemical processing, advanced ceramic materials and functional titanium materials.
The customer can accurately control wet-basis dosing
Wet material must be dosed according to its actual TiO₂-equivalent content rather than simply by gross weight.
This requires a proper batch calculation. Using the same nominal weight of filter cake and powder would introduce different quantities of titanium.
When Should You Choose Metatitanic Acid Powder?
Powder is usually more suitable when the customer requires controlled dry dosing, compact packaging or integration with other solid raw materials.
Powder may be suitable when:
The process uses dry blending or solid-state reaction
Powder can be weighed and mixed directly with other solid raw materials, including lithium compounds, ceramic precursors and functional additives.
This is particularly relevant for:
- Lithium titanate synthesis
- Lithium adsorbent precursor preparation
- Solid-state ceramic reactions
- Laboratory formulation
- Pilot-scale material development
A higher TiO₂-equivalent concentration is preferred
At 68.7% TiO₂, the powder introduces more titanium per kilogram than the 50.2% filter cake.
This reduces the gross mass required to achieve the same titanium input.
Smaller packaging is required
The powder TDS lists:
- 25 kg per bag
- Customized packaging
This is more practical for laboratory, development, pilot or lower-volume production environments.
Water input must be minimized
A process using controlled solid-state stoichiometry may prefer a lower volatile input, particularly where the added water would later need to be removed.
The target application is lithium titanate or lithium adsorbent precursor synthesis
The powder TDS specifically lists:
- Lithium titanate materials, including Li₂TiO₃/LTO
- Lithium adsorbent materials
- Advanced functional titanium materials
- Titanium-based chemical precursors
This makes the powder grade the more clearly documented choice for lithium-related titanium precursor applications.
Application-by-Application Selection Guide
High-Purity Titanium Dioxide Production
Typical preference: Filter cake
The filter cake TDS specifically identifies high-purity titanium dioxide production as an application.
A wet intermediate may integrate naturally into sulfate-route purification, washing, treatment and calcination systems.
However, suitability still depends on:
- Target TiO₂ phase
- Impurity requirements
- Sulfate-control strategy
- Calcination conditions
- Particle-property targets
Lithium Titanate Synthesis
Typical preference: Powder
Powder is generally easier to combine with lithium-containing solids in controlled ratios.
Its higher TiO₂-equivalent content and lower volatile matter can simplify:
- Dry weighing
- Li:Ti ratio calculations
- Solid blending
- Furnace feed preparation
- Laboratory and pilot batching
The powder TDS directly lists Li₂TiO₃/LTO materials as an intended application.
Lithium Adsorbent Precursor Production
Typical preference: Powder
For titanium-based lithium adsorbent synthesis, metatitanic acid acts as an upstream titanium precursor rather than the finished adsorbent.
Powder may be preferred because it can be incorporated into controlled lithiation, mixing and calcination routes.
The final adsorbent performance will still depend on downstream variables such as:
- Lithium source
- Li:Ti ratio
- Mixing uniformity
- Reaction temperature
- Calcination profile
- Phase formation
- Acid activation
- Particle forming
Selecting powder does not, by itself, guarantee the performance of the final lithium adsorbent.
Advanced Ceramics
Possible preference: Either form
Both technical data sheets identify advanced ceramic or advanced functional titanium applications.
The correct choice depends on the ceramic-production route.
Use filter cake when:
- Wet milling is already required
- Slip or slurry preparation is used
- Aqueous mixing is part of the process
Use powder when:
- Dry blending is required
- Solid-state reaction is used
- Precise dry dosing is important
- Lower water input is preferred
Titanium Chemical Processing
Possible preference: Process dependent
Filter cake is explicitly positioned for titanium chemical processing, while powder is positioned as a titanium-based chemical precursor.
This means both forms may be suitable, but the correct selection depends on whether the reaction system is wet or dry.
Process Questions to Ask Before Selecting a Grade
Before requesting a quotation or sample, buyers should answer the following questions.
1. Is the downstream process wet or dry?
This is the most important initial decision.
- Wet or slurry process: filter cake may be more efficient
- Dry blending or solid-state process: powder may be more practical
2. How will the material be fed?
Consider whether the plant uses:
- Bulk-bag unloading
- Screw feeding
- Manual bag charging
- Slurry pumps
- Agitated dissolution tanks
- Pneumatic powder transfer
The feeding system may eliminate one form from consideration before chemical performance is even evaluated.
3. Is dosing controlled by gross mass or TiO₂-equivalent content?
Metatitanic acid should be dosed according to the titanium input required by the formulation.
For accurate comparison, calculate:
Using gross mass without correcting for TiO₂ content can significantly alter the formulation.
4. Can the process tolerate the volatile content?
A higher volatile input may affect:
- Drying load
- Reactor volume
- Slurry concentration
- Energy consumption
- Residence time
- Mixing behavior
5. What packaging can the facility handle?
A laboratory may prefer 25 kg powder bags.
An industrial wet-processing plant may prefer 500 kg or 1,000 kg filter cake bags.
6. What is the final application?
The current product positioning provides a practical starting point:
| Application | More directly aligned grade |
|---|---|
| High-purity TiO₂ | Filter cake |
| Titanium chemical processing | Filter cake or process dependent |
| Lithium titanate | Powder |
| Lithium adsorbent precursor | Powder |
| Advanced ceramics | Either, depending on process |
| Functional titanium materials | Either, depending on route |
Common Selection Mistakes
Mistake 1: Assuming higher TiO₂ means higher purity
The powder has a higher TiO₂-equivalent concentration, but the two TDS sheets list the same values for the principal metallic impurities and sulfate.
Mistake 2: Comparing only price per kilogram
The correct comparison should include:
- TiO₂-equivalent delivered
- Packaging
- Transported mass
- Drying or re-slurrying cost
- Feeding requirements
- Waste and handling losses
Mistake 3: Ignoring volatile matter in the formulation
A one-ton batch of filter cake and a one-ton batch of powder do not introduce the same quantity of titanium or volatile material.
Mistake 4: Selecting powder when the plant cannot control dust
Powder may provide easier dosing, but it requires appropriate dust collection, enclosed transfer and industrial hygiene controls.
Mistake 5: Selecting filter cake without wet-material handling equipment
Bulk filter cake requires appropriate unloading, conveying, slurry preparation or wet-feeding systems.
Mistake 6: Treating supplier grade selection as a substitute for pilot testing
Even where specifications are similar, downstream reaction behavior can depend on the customer’s equipment and formulation.
Representative sample evaluation should therefore be completed before full-scale conversion.
Storage and Handling Considerations
Both current TDS sheets recommend dry, ventilated storage, protection from moisture and sunlight, separation from reactive chemicals and careful batch management.
For filter cake
Pay particular attention to:
- Packaging integrity
- Batch segregation
- Moisture consistency
- Contamination during unloading
- Long-term storage stability
- Compatibility with wet-material equipment
For powder
Pay particular attention to:
- Dust control
- Sealed transfer
- Moisture uptake
- Bag handling
- Local exhaust ventilation
- Accurate dry feeding
Although the TDS describes the products as non-toxic, normal chemical-handling precautions should still be applied.
Decision Matrix
| Process Requirement | Recommended Form |
|---|---|
| Existing aqueous slurry process | Filter cake |
| Dry solid-state mixing | Powder |
| Small laboratory or pilot batches | Powder |
| Industrial bulk wet processing | Filter cake |
| Higher TiO₂ equivalent per kilogram | Powder |
| Avoid powder dust | Filter cake |
| Minimize added volatile matter | Powder |
| High-purity TiO₂ intermediate | Filter cake |
| Li₂TiO₃ or lithium adsorbent precursor | Powder |
| Advanced ceramics using wet milling | Filter cake |
| Advanced ceramics using dry blending | Powder |
Frequently Asked Questions
Is metatitanic acid powder better than filter cake?
Not universally.
Powder is usually more suitable for dry dosing and solid-state synthesis. Filter cake may be more efficient in wet-processing systems.
The correct grade depends on the customer’s process configuration.
Why does the powder contain more TiO₂?
The powder TDS lists lower matter volatile at 105°C, resulting in a higher TiO₂-equivalent concentration per kilogram.
Does powder have lower impurity levels?
Not according to the current listed specifications.
The two grades show the same listed values for Fe, Al, Si, K, Ca and SO₄²⁻.
Can filter cake be used for lithium titanate production?
Potentially, but the current powder grade is more directly positioned for lithium titanate and lithium adsorbent precursor applications.
The customer would need to evaluate the additional volatile input, mixing route and titanium mass balance.
Can powder be used for titanium dioxide production?
Potentially, depending on the production route.
However, the current filter cake grade is specifically positioned for high-purity titanium dioxide production.
Which form is cheaper to transport?
Powder carries more TiO₂ equivalent per kilogram, which may reduce transported mass for a fixed titanium requirement.
However, the final logistics comparison also depends on packaging, freight method, handling requirements and shipment volume.
Should I compare the two forms on a wet basis or dry basis?
Both views are useful, but formulation and purchasing decisions should include TiO₂-equivalent input.
Comparing only the gross wet material mass can be misleading.
Conclusion
The choice between metatitanic acid powder and filter cake is fundamentally a process-integration decision.
Choose filter cake when the plant operates through wet chemical processing, slurry preparation or industrial bulk handling.
Choose powder when the process requires dry dosing, solid-state mixing, compact packaging, lower volatile input or a higher TiO₂-equivalent concentration per kilogram.
The current specifications also show that the two grades have comparable listed impurity control. Therefore, the decision should not be framed as “high-purity powder versus low-purity filter cake.” It should be framed as:
Which physical form delivers the required titanium input with the lowest total processing complexity?
Inter-China Chemical supplies high-purity metatitanic acid in both powder and filter cake forms. Customers can provide their application, target batch size, process type, titanium requirement and preferred packaging for preliminary grade selection.