Anthraquinone powder can suit pulp mills with appropriate solids handling and feed preparation, as well as pulping-additive manufacturers that formulate their own products. An aqueous dispersion can fit an established liquid receiving and metering system. The purchasing decision depends on the cost of supplying the required AQ content through a feed arrangement that works at the mill.
Unilong supplies industrial anthraquinone powder, 98.5% min, in 25 kg drums, currently in stock.
Anthraquinone Powder vs Dispersion: Key Differences
Powder and aqueous dispersions place different demands on material receiving, preparation and dosing.
| Purchasing consideration | Anthraquinone powder | Anthraquinone aqueous dispersion / slurry |
|---|---|---|
| Supplied material | Solid material; AQ content follows the grade specification | AQ particles suspended in a liquid carrier; concentration depends on the formulation |
| Receiving and metering | Solid handling and weighing, followed by a feed arrangement suited to the powder | Liquid transfer and metering equipment suited to the supplied suspension |
| Preparation for feeding | May involve preparing a slurry; the route depends on the powder and the mill's feed system | AQ is already incorporated into a liquid formulation; mixing and feed requirements remain product-specific |
| Storage and uniformity | Closed containers, moisture protection and dust control during handling | Storage conditions, settling behavior and any agitation requirements depend on the product |
| Transported carrier weight | A high-assay powder carries comparatively little non-AQ material | Water and other formulation components contribute to the shipped weight |
Anthraquinone has very low water solubility. Wetting and distributing its particles are therefore important when preparing an aqueous feed. Particle size and the choice of dispersing components affect how the resulting suspension behaves; a high purity figure alone does not establish its preparation or storage performance.[1]
Ordinary industrial powder, micronized powder and a dry dispersible formulation also represent different purchasing options. Some dry dispersible products incorporate processing additives, so the word “powder” alone does not describe their composition or handling behavior.[3]
A parent-AQ slurry should also be distinguished from a water-soluble derivative product. AWPC's SAQ, for example, is described as an aqueous solution of an anthraquinone-derived substance.[2]
For the powder grade Unilong supplies, view industrial anthraquinone powder specifications. For process background, see anthraquinone in soda and kraft pulping.
Comparing Delivered and On-Site Costs
A consistent AQ-content basis makes powder and dispersion offers easier to compare. The product weight needed to deliver a given quantity of AQ can differ substantially.
Illustrative content comparison: assume a dispersion containing 50% AQ by weight and a powder containing 98.5% AQ by weight.
| Material | Product weight | AQ content used in the calculation | AQ contained |
|---|---|---|---|
| Aqueous dispersion | 1,000 kg | 50% | 500 kg |
| Powder | Approximately 507.6 kg | 98.5% | Approximately 500 kg |
The powder calculation is 500 kg ÷ 0.985 ≈ 507.6 kg, or about 508 kg.
These are assumed values for the comparison, rather than batch results. The 50% figure is an example, not a standard concentration for dispersions. Matching the amount of AQ purchased does not establish equal pulping performance or a direct dosing replacement.
The commercial comparison then includes three cost areas:
- Product and delivery: purchase price, freight, packaging and applicable import charges for the quantity shipped.
- Preparation and feeding: equipment use, energy, water and any formulation ingredients for an on-site powder preparation route, compared with the receiving, mixing and transfer requirements of the supplied dispersion.
- Handling and material recovery: labor, cleaning, dust control and material remaining in containers, preparation vessels or feed lines.
Where suitable preparation facilities already operate, powder may avoid transporting much of the liquid carrier. Where powder supply would require new equipment or additional preparation capacity, those costs can change the result. The better offer is the one that fits the mill's complete supply and handling arrangement.
Switching from Dispersion to Powder: What Changes?
The central question is how the mill will convert the purchased powder into a consistent AQ feed. An existing liquid storage tank and metering pump do not, by themselves, provide the equipment needed to receive and prepare a solid.
For a mill with suitable preparation facilities, powder can be considered alongside the capacity and operating cost of that equipment. The relevant material characteristics include particle size and wetting behavior, while the preparation route must suit the required feed consistency. These factors distinguish an appropriate powder grade from a material selected solely by purity.
For a pulping-additive formulator, powder is a feedstock for making a finished additive. Purchasing decisions therefore include its fit with the company's own formulation and preparation process. A dry dispersible blend and an unformulated industrial powder can require different amounts of additional processing.
A ready-made dispersion may contain dispersants, stabilizing components or other ingredients, depending on the formulation. Such components can affect wetting, viscosity and suspension uniformity.[1] Replacing the AQ content with powder alone does not reproduce those properties.
For a mill that depends on a particular finished dispersion and has no suitable powder preparation route, continuing with a compatible liquid product may be the more practical option. AQ use and any supply-form change must also fit the mill's accepted chemical list and the intended end use of the pulp.
Industrial Anthraquinone Powder In Stock at Unilong
Unilong has industrial anthraquinone powder available for commercial manufacturing orders.
| Supply detail | Available product |
|---|---|
| Product | Anthraquinone |
| CAS number | 84-65-1 |
| Form | Industrial powder |
| Purity | 98.5% min |
| Standard packaging | 25 kg/drum |
| Availability | Currently in stock |
For mills and additive manufacturers considering powder supply, the anthraquinone CAS 84-65-1 product page provides the grade specifications and packing details.
Request Current Stock & Pricing
Send your required quantity and destination country or port to sales@unilongindustry.com. Include any particle-size or other material requirements relevant to your existing process. Unilong will quote the available quantity, price and shipment arrangements for your order.
Post time: Oct-29-2026