Wet Process Aluminum Hydroxide

Wet process aluminum hydroxide (WPAH) is a high-performance inorganic functional material (chemical formula Al(OH)₃) prepared through an integrated process of "bauxite leaching gradient crystallization membrane coupling purification in-situ wet modification". Its core advantage lies in the dual retention of crystal integrity and surface activity - regular crystal structure, abundant surface hydroxyl groups, and achieving ultra-high purity of over 99.99% and narrow distribution particle size control of ≤1.0μm. The penetration rate in high-end flame retardant, electronic ceramics, lithium battery separators, precision polishing and other fields has been increasing year by year, especially suitable for high-end manufacturing scenarios with strict requirements for impurity content, dispersion performance, and environmental indicators. It has become the core material for downstream enterprises to achieve product upgrades and import substitution.

Core strengths

1. Gradient crystallization membrane coupling purification technology: ultimate control of impurity content

-The impurity content approaches zero: Fe₂O₃≤0.5ppm，SiO₂≤1.2ppm，Na₂O≤3ppm, chloride ion content<10ppm, total impurity content ≤ 5ppm, purity reaches 99.996%, far exceeding the dry process (conventional impurity content ≥ 50ppm);

-Regular crystal structure: generates a single trihydrate alumina crystal form, with uniform crystal morphology, stable specific surface area of 8-12m ²/g, fluctuation range of thermal decomposition temperature of ≤± 3 ℃, and significantly improved flame retardant performance consistency;

-Green and energy-saving: Membrane separation technology replaces traditional washing processes, increasing water resource utilization by 90%, reducing wastewater discharge by 90%, and reducing energy consumption per ton of product by 22% compared to traditional processes.

Search for compatibility: Does the impurity of aluminum hydroxide used in electronic ceramics/lithium battery separators exceed the standard? Wet deep purification technology achieves ppm level impurity control and has passed semiconductor industry certification!

2. In situ wet modification process: achieving molecular level interface compatibility

-Ultimate encapsulation efficiency: The modifier undergoes a chemical reaction with the hydroxyl groups on the surface of the particles, resulting in a encapsulation rate of 98% (compared to only 30% in the dry process), an activation index of ≥ 99%, an increased water contact angle of 118 °, and a moisture absorption rate of ≤ 0.06%;

-Excellent dispersibility: The modified particles have a dispersion uniformity of 99% in the polymer matrix, with an aggregate proportion of ≤ 1%. It can achieve native particle level dispersion without the need for additional dispersants, and the melt flow rate is increased by 30%;

-Environmentally friendly and pollution-free process: The entire process is carried out in an aqueous solution without dust pollution. The utilization rate of the modifier is increased by 60%, and the biodegradation rate is ≥ 95%, which meets the requirements of ISO 14064 carbon footprint certification.

3. Micro interface confined crystallization model: precise control of particle size distribution

-Full coverage of particle size range: Customizable particle size range of 0.3-10μm, with core product D50 controlled between 0.8-1.5μm and Span value ≤ 0.8 (industry average ≥ 1.2), D90/D10≤2.3， The particle size distribution is extremely narrow;

-Optimization of filling performance: Narrow particle size distribution achieves tight packing of particles, increasing filling density by 35%. At the same addition amount, the total heat release (THR) of the composite material is reduced by 27%, and the residual carbon rate is increased to 21.3%;

-Strong processing adaptability: Suitable for different processing scenarios such as film extrusion, precision injection molding, and high-end coatings, avoiding surface defects caused by uneven particle size, and increasing the product qualification rate to 99.8%.

4. Multi functional modified system: adapted to meet the needs of all scenario applications

-Silane titanate composite modification: suitable for polyolefin and EVA systems, interface shear strength increased by 2.8 times, tensile strength retention rate ≥ 93% at 60% filling amount, and impact strength increased by 42%;

-Organic phosphorus synergistic modification: adapted to epoxy resin and polyurethane systems, flame retardant efficiency increased by 25%, and the addition amount of 32% can reach UL94 V-0 level, reducing the filling amount by 23% compared to unmodified products;

-Parent block copolymer coating: Suitable for low/high temperature cycling scenarios. After 100 thermal cycles from -40 ℃ to 120 ℃, the interface peel strength attenuation rate is less than 8%, meeting the extreme environmental requirements of new energy vehicles.

Search adaptation: Does high filling ATH cause material brittleness? Wet composite modification technology achieves 60% filling amount while retaining 93% mechanical properties, achieving a win-win situation of flame retardancy and toughness!

5. Photovoltaic electrolytic aluminum hydroxide zero carbon industry chain: ultimate reduction of carbon footprint

Building a zero carbon production system of "photovoltaic electrolytic aluminum hydroxide", using photovoltaic power to drive electrolytic aluminum and wet synthesis processes, with a full lifecycle carbon footprint of only 0.32 tCO ₂/t products, far lower than the coal-fired power route (2.1 tCO ₂/t). Through the compliance certification of the European Union Carbon Border Adjustment Mechanism (CBAM), it helps customers' products enter the European market without barriers.

Application scenarios

1. Electronic Ceramics and Electronic Packaging: High end Domestic Replacement of Core Materials

-Application scenarios: Multi layer ceramic capacitors (MLCC), integrated circuit substrates, semiconductor polishing materials, LED packaging adhesives;

-Core value: 99.996% high purity and ppm level impurity control, ensuring ceramic sintering density and stable dielectric properties, dielectric constant ≤ 2.8, insulation resistance ≥ 10 ¹⁴Ω· cm, achieving imported product substitution, with a domestic high-end market share of over 55%;

-Is the purity of aluminum hydroxide used in MLCC insufficient? The wet process product has a purity of 99.996%, low sodium and low silicon, meeting the production requirements of multi-layer ceramic capacitors!

2. New energy vehicles and lithium batteries: ensuring battery safety and performance

-Application scenarios: lithium battery separator coating, power battery pack insulation layer, new energy vehicle wiring harness, photovoltaic cable;

-Core value: Nano scale wet process aluminum hydroxide as a membrane coating material can enhance the thermal stability and puncture strength of membranes, with a temperature resistance of over 180 ℃; The new energy specific model has high thermal conductivity (≥1.3W/(m·K)), effectively reducing battery temperature rise. Through battery thermal runaway diffusion testing, it is supplied in bulk to CATL and BYD;

3. Wires, cables, and flame-retardant rubber: Efficient, environmentally friendly, and upgraded flame retardant

-Application scenarios: Low smoke halogen-free cable materials, rail transit interiors, high-end rubber products, flame retardant films;

-Core value: In situ wet modified products have excellent compatibility with substrates such as EVA and PP, maintaining good flexibility even with a 60% filling amount. The tensile strength retention rate is ≥ 93%, meeting the strict flame retardant standard of IEC 60332-3C, with low smoke density during combustion, and passing the EN45545-2:2025 rail transit low smoke and low toxicity standard;

4. High end coatings and building materials: balancing performance and environmental protection

-Application scenarios: A-level fireproof coatings, polymer cement waterproof coatings, high-end decorative coatings, flame-retardant insulation boards;

-Core values: high whiteness (L≥97), easy dispersion, no sedimentation layer, smooth construction without brush marks, excellent compatibility with resin, coating adhesion improved by 1 level, in line with GB 8624 building fire protection A-level standard, low VOC emissions, and passed the German GEV EC1plus environmental certification;

5. Precision polishing and catalyst support: expanding into high value-added fields

-Application scenarios: semiconductor wafer polishing, sapphire substrate processing, chemical catalyst carriers;

-Core values: Uniform crystal morphology, narrow particle size distribution, atomic level polishing accuracy, stable specific surface area of catalyst support, 30% improvement in uniformity of active component loading, meeting the requirements of high-end manufacturing for material refinement.

Frequently Asked Questions (FAQ)

Q1: What is the difference between wet process aluminum hydroxide and dry process aluminum hydroxide?

A1: Difference: ① Purity: Wet ATH purity ≥ 99.99%, total impurities ≤ 5ppm, dry ATH purity is mostly around 99.5%; ② Crystal structure: The wet process ATH crystal structure is regular and consistent, while the dry process ATH crystal structure is irregular and has a wide particle size distribution; ③ Adaptability: Wet ATH is suitable for high-end fields such as electronics and medical, while dry ATH is only suitable for ordinary rubber, building materials, and other fields.

If you are looking for wet process aluminum hydroxide or semiconductor specific wet process ATH, Taixing will be your best partner and we will provide the lowest price cooperation!