Chemical and solvent manufacturers rely on filters to ensure the quality of their products and to lower production costs.

We supply filters manufactured from a diverse range of media with removal ratings from 0.03 – 1000 µm and in different formats, so we can always provide the best filtration solution for each individual application.

Typical Products Requiring Filtration

  • Acids, bases, organic solvents, resins, monomers, polymers and raw materials
  • Industrial gases
  • Process water, boiler feed, demineralised feed, pre-reverse osmosis and waste water


Filtration of Raw Materials, Intermediates and Final Products

Final products need to be free of contaminants such as fibres, solid particles, deformable gels and where the product is a clear liquid, such as an organic solvent, free from haze. Experience has shown that limiting the use of effective filtration to just the final product is not a good strategy if the required product quality is to be achieved at an acceptable cost. It is important to control contamination levels in the raw materials and intermediate process streams, in addition to final product. This will help ensure overall filtration costs are controlled, quality targets are met and product rework is minimised.

APT is able to supply  filters with a variety of materials to match the variety of liquids to be processed, therefore we are able to choose the most appropriate filter for each application. Our range of products includes both depth and pleated filters. Media options include polypropylene and glass fibre and we also offer PTFE, Halar and nylon filter media where higher compatibility is required.

Filters typically used are:-

  • Polypropylene  and nylon  meltblown depth filters
  • PTFE and Halar pleated filters
  • Polypropylene  pleated cartridges
  •  bag filters

Filters are available with ratings as fine as 0.03 µm and up to 1000 µm, so are suitable for all particle control applications. For particularly aggressive chemicals or solvents, high temperature applications or high viscosity products such as resins requiring high pressures, we offer mesh filters manufactured entirely from stainless steel.

Solids Removal

During the reaction process or during the purification process there will often be a requirement to separate solids from the liquid. This can be achieved by surface filtration using pleated cartridge filters or by utilising high solids retaining bag filters.

Carbon Treatment

Activated carbon is often used in chemical and solvent manufacturing to remove impurities produced during the reaction steps or as part of the catalyst recovery process. Cartridge filters or filter bags are used to remove spent bulk carbon. A better alternative to bulk activated carbon is to use activated carbon cartridges in single pass or recirculating mode. These can offer a more compact, cleaner, easier to handle and cost effective carbon treatment solution.

Industrial Gases

Process gases should be filtered to prevent contamination of the product and damage to process equipment such as control valves. Where the gas is the final product, particle control is required to ensure final quality specifications are met PTFE where a hydrophobic media is advantageous. For high temperature or high pressure applications, we offer mesh filters containing stainless steel media.

Water Treatment

APT has years of experience in all areas of Water Treatment processes and our products are an essential resource to this important utility. Incoming mains water, post carbon bed traps, pre and post UV and pre-RO filters are just a few of the applications where our products can be relied upon. Typically  depth cartridges or pleated filters are used for particulate removal and membrane protection. In high flow systems the large diameter Contour or high flow filters are used.

Coatings, Paints and Inks 

Every type of product, whether a decorative, protective or product-enhancing surface coating will require filtration at some stage in its manufacturing process. The use of effective filtration is vital to meet the product quality specification and to ensure the end user will achieve the intended final finish. Absolute Process Technologies has experience of a wide range of products including printing inks, lacquers, solvent based trade paints, emulsions, electro-deposition and high quality industrial paints. We have the product ranges and the experience to ensure the performance and cost targets are met for each application.

Key Applications

The ingredients and products being manufactured will contain a wide range of contaminants that will need removing during the production process. These will include particulates introduced from the equipment or environment, agglomerated or undispersed pigments, deformable gels, films and fibres. Filters used to remove these contaminants must also avoid removal of the pigment particles, so filters need to have a very well defined removal rating. Filters need to provide both clarification and classification.

To ensure the optimum filter is used in each application, APT supplies a wide range of products. Our range includes filter bags, melt-blown depth filters such as polypropylene  and nylon  and pleated media filters . Therefore we are able to provide the ideal filter even if the need is to remove deformable contaminants and fibres or the liquid is highly viscous. Our cartridge and bag filter systems are often preferred to traditional plate and frame systems as they are easier to clean, suffer less product losses and offer better protection to the operators from VOCs used for solvent based products. Where a simple mesh strainer is required we offer filters from APT’s mesh product range.