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Supercritical Uses

  • It has been suggested that supercritical CO2(sc-CO2) can be used for treating mixed hazardous wastes.
  • There has been a large effort recently in exploring the use of sc-CO2 for synthesis to minimize pollution from solvents.
  • An increased importance of sc-CO2 in synthesis will require a better understanding of primary chemical processes in supercritical solutions.
  • The possibility of using supercritical water in a new generation of more efficient nuclear reactors requires an understanding of reactions in this medium.
  • Radiation chemical techniques, and in particular pulse radiolysis, can be used to generate reactants for study that are not easily accessible in any other way. We have applied these techniques to determine the primary products formed in radiolysis of sc-CO2. We have measured rates of electron transfer reactions in sc-CO2 and begun studies of solvated electron formation in alcohol clusters in supercritical ethane. We have also begun to study the reaction of O with O2 as a function of pressure, which provides an important test of chemical reaction theories that treat the transition from a three-body to a two-body reaction mechanism.

Super Critical CO2 Extraction

Supercritical Extraction Process is the process of separating one component (the extract ant) from another (the matrix) using supercritical fluids as the extracting solvent. Extraction is usually from a solid matrix, but can also be from liquids. The major application on industrial scale to either strip unwanted material from a product (e.g. decaffeination) or collect a desired product (e.g. essential oils, herbs extract, active ingredients for medicines). Carbon dioxide (CO2) is the most used supercritical fluid, sometimes modified by co-solvents such as ethanol or methanol. Extraction conditions for supercritical CO2 are above the critical temperature of 31°C and critical pressure of 74 Bar.

Supercritical fractionation

This is a process to separate the low boiling essential oils or other active ingredients from the high boiling components of the combined total extract. This can be done with liquid supercritical fractionation column. Highly Concentrated

The Supercritical Extraction process delivers a superior extract that is highly concentrated with incredible purity. Super Pure & Chemical-Free And unlike chemical extraction with industrial solvents like hexane and acetone where harmful residues of such chemical supplements, Supercritical Extraction leaves no harmful residues and the process use natural CO2

Services provide by SVCGPL:

We also offer a variety of service for supercritical extraction including extraction of material on job. We can provide complete solution for extraction by Supercritical CO2 method that includes:

  • Complete Plant machinery and instrumentation on turn key basis.
  • Analytical support for methods of analysis of active ingredients available in the extracts of herbs and spices
  • Undertake research samples of commercial scale production, and develop optimum condition for extraction and commercial scale planning and project report

The specifications of the commercial and pilot plants are:

Commercial plant - 3 extractors of 300/500 litres capacity; Pilot plant - 1-2 extractors of 10 litres capacity, 2 separators; Operating pressure - 350 or 500 bar (max); Temperature - 80 degree C; Material of construction - SS 326; Controls - PLC based system with alarms and interlocks for safety.

Areas of application:

Agro industry - spice oils and oleoresins, essential oils - flavours and fragrances, bitter from hops, herbal medicines including Artemisia ;natural pesticides, food colours and preservatives, vitamin E (tocopherols), Nicotine/tar free tobacco, decaffeinated coffee and tea, cholesterol free food products.