Mass Transfer Technology


Batch distillation systems are extremely flexible in nature. A single unit can be designed to handle wide variety of feed mixtures. It is also possible to handle multi component feed mixtures in the same column. Feed containing residues, having tendency to foam can be handled with ease if particular attention is paid during design. Addition of a phase splitter/ Decanter allows complete drying of solvent mixtures forming Azeotropes like water-Ethanol/IPA etc. In case of aqueous systems option of direct steam injection can offer several benefits. Operating batch column in semi batch mode or inverted batch fashion can be useful in several situations since it overcomes the disadvantage of batch column of having no stripping section.

We offer some unique equipments’ useful to batch distillation units. They include Internal Condensers directly mounted on column tops, Efficient Kettles without agitator, Phase splitter with very low hold up, Falling film product cooler cum condenser and automatic reflux splitter. These components when used in conjunction with efficient structured packing that we supply through our business associates result in to several advantages like: extremely low liquid hold ups, giving sharper cuts or lower intermediate cuts while distilling multi component mixtures, quick start ups, lower solvent losses due to operational disturbances, lowering the malfunctioning of system, and ultimately in lower pay back periods. A batch distillation is simple to control as there is no need to balance the feed and draw. Nevertheless the batch unit has unique requirements of instrumentation and control. We understand these and supply total PLC based instrumentation package.


We have the expertise to handle, most of the complex engineering problems in these areas like Azeotropic, Extractive, Reactive and other Multi-component distillations, Highly efficient distillation systems incorporating novel thermal integration / energy saving strategies, separation of close boiling isomers, handling of heat sensitive materials and ultra high vacuum distillations etc.

At least 100 columns are working based on our designs in various industry segments, some containing up to 12 column sequence.

We can Supply skid mounted plants or just equipments like Distillation Columns, Column internals like trays or structured / random packings. Distillation accessories like condensers, Reboilers / vaporizers, receivers can also be supplied.


We have the expertise to offer wide range of solvent recovery systems ranging from single stage flash units (Evaporation) to handling most complex feed mixtures. We are prepared to understand the unique requirements, look at all possible alternatives and work in close association with you to arrive at the best possible solution. For this we utilize our own design software based on latest batch/continuous algorithms. We can undertake Pilot plant trials to understand the peculiarity of the feed if required. We respect the value of information disclosed to us.

Like Methanol, Ethanol, Butanol, MDC, DMSO, Ethylene Glycol, Acetic Acid

We have expertise and offered azeotropic distillation systems on turn-key basis for below applications:

IPA – Water, Ethyl Acetate – Water, Ethanol – Water


Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is reduced to less than its vapor pressure (usually less than atmospheric pressure) causing evaporation of the most volatile liquid(s) (those with the lowest boiling points).This distillation method works on the principle that boiling occurs when the vapor pressure of a liquid exceeds the ambient pressure. Vacuum distillation is used with or without heating the mixture.


Dividing wall columns can be used wherever multi-component mixtures have to be separated into pure fractions. They are particularly suited to obtain pure medium boiling fractions. The separation of a three component mixture into its pure fractions in conventional systems requires a sequential system with at least two columns or main columns with side columns. With a dividing wall column this task can be solved in only one apparatus.


  • Reduce energy and investment costs
  • Two columns are combined into one shell
  • Three on spec products can be produced with one column
  • The dividing wall creates a prefractionator on the feed side, which reduces the chance of pollution of the on spec middle product with the feed on the product side


We can supply skid mounted batch, continuous pilot distillation units in several materials up to 5000-liter capacity. We can also supply individual equipments if so desired. Structured, Lab packings are ideally suited to batch distillation columns because of their higher efficiencies and lower liquid hold up/ pressure drops. We can supply packed columns with quality, structured packings complete with associated internals.

Liquid Extraction

Liquid-liquid-extraction is a separation technology that is based on the distribution of one or more components between two immiscible or almost immiscible liquids and is one of the most important separation/purification techniques widely used in process industries. Extraction finds it is most suitable application when the material to be separated is non-volatile or heat sensitive and when it is not possible to separate by distillation or evaporation.

CDPS specializes in the design and manufacturing of liquid-liquid extraction equipment engineered to fulfill the increasingly challenging purification requirements of chemical, pharmaceutical, petrochemical, biotech and flavor & fragrance industries.

We have expertise and offered LLE systems on turn-key basis for below applications:

  • MDC – Methanol
  • THF – Hexane,
  • Acetone – Methanol


We can Design and/or supply complete absorption systems mounted on skids or otherwise. The equipments involved are wet scrubbers, ventury scrubbers, packed columns, blowers etc. The materials can be Stainless Steels, PP, FRP, HDPE etc.

We have so far supplied systems for the removal of ammonia, sulfur dioxide, hydrogen sulfide, and ammines and met the local regulatory norms.
The ventilation may involve simple replacement of stagnant air by means of fans or it can be a complex combination of several equipments that can even recover some chemicals.

We can handle:

  • Physical or Reactive absorption.
  • Desorption can be by means of steam or air.
  • Sensitivity studies to locate the optimum solvent rate.
  • Column internals can be tray or packed.
  • Compact/Skid mounted system designs for small capacities.
  • Complete automation using PLC/ DCS.
  • Good experience for contaminants like ammonia, NOx, So2, H2S


Stripping is a physical separation process where one or more components are removed from a liquid stream by a vapor stream. In industrial applications the liquid and vapor streams can have co-current or countercurrent flows. Stripping is usually carried out in either a packed or tray column.


Mixing & Reaction

We offer innovative solutions and quality equipment for static mixing, heat exchange, reaction technology. CPDS has unique design & manufacturing facility for reactors & mixers (Static & Agitated)

Methanol Recovery

The excess methanol is recovered from the bio diesel, glycerine, and fatty matter, dried and reused in the two-step transesterification reaction.

Glycerine Recovery

Glycerine generated in the two-step trans-esterification reaction is recovered and neutralized. The crude glycerine contains greater than the maximum 0.01 percent salts allowed in technical grades and is less than 99 percent pure. The salts are formed from the reaction of the caustic and acid used in most trans-esterification processes. The salts are removed when the glycerine is distilled or refined to a technical grade or higher quality.