Unit operation
Filtration toll manufacturing: centrifuges, filter presses, ANFD
For slurries that need to become a washed cake, and for liquids that need to leave clear, on equipment sized for your batch.
Live listings
No verified unit lists Filtration capacity yet. Listings appear here the day our desk approves them, and the guide below is how we qualify one when it does.
Post your requirement and our broker desk looks for the capacity by hand, or list your own unit if you run one.
What filtration on job work involves
Filtration is rarely bought alone; it is the step between reaction or crystallisation and drying, and a client who buys the reactor or the crystalliser on toll manufacturing buys the filter with it. It matters because the wash decides purity, the cake decides drying time, and the mother liquor decides yield and effluent. It also decides how much solvent the operators breathe.
Peeler, bag-lifting and basket centrifuges handle crystalline solids at speed; filter presses take large volumes of fine solids; agitated nutsche filter dryers filter, wash and dry closed in one vessel for solvent-wet or potent products. Sparkler and cartridge filters polish liquids. Mother-liquor recovery and closed operation are what separate a good toll plant from a bare one.
What to check before you send an enquiry
The questions our desk puts to a unit before it qualifies an enquiry for Filtration. A listing answers most of them; the trial batch answers the rest.
- Filter type for your solid: centrifuge for crystalline, fast-settling material; filter press for fine or slimy solids; ANFD for solvent-wet or potent cakes.
- Wash protocol and its result — residual impurity or colour in the cake after the wash the plant proposes.
- Mother-liquor handling: recovery, recycling or treatment, and who owns the dissolved product it carries.
- Closed operation and area classification for flammable solvents, and containment for toxic solids.
- Product-contact surfaces, cloth and bag changes between products, and cleaning records if your material needs GMP handling.
Where the capacity is
Filtration sits beside every reactor and crystalliser: Ankleshwar and Panoli for agro and intermediates, the Hyderabad estates and JN Pharma City for pharma cakes, Vatva and Vapi for dyes and pigments.
Unit operations
Industries served
Common questions
- What is toll filtration?
- Toll filtration is having a solid separated from a liquid at a plant that owns the filters, with you keeping ownership of the material. It is bought both as a step inside a larger toll campaign and on its own, for polishing a solution, recovering a product cake or removing a catalyst.
- Which filter suits which duty?
- A filter press handles large volumes of easily filtered slurry cheaply but is open to the room. A Nutsche filter is closed and suits solvent-wet or hazardous cakes and gives proper washing. A centrifuge, whether basket or peeler, suits fast-settling crystals and gives a drier cake. The agitated Nutsche filter dryer combines filtration, washing and drying in one closed vessel.
- Can filtration and drying be done in one unit?
- Yes, in an agitated Nutsche filter dryer, and for solvent-wet or potent materials it is usually the right answer. The cake is filtered, washed and dried without ever being exposed, which protects both the operator and the product. Ask whether the plant has one and what its working volume is.
- How should cake washing be specified?
- By naming the wash solvent, the number of washes, the volume per wash, and the acceptance test on the final cake, such as a residual impurity or chloride limit. "Washed thoroughly" is not a specification and cannot be checked on a certificate of analysis.
Other unit operations
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