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High-Pressure Processes

Research areas
  • Application of supercritical solvents to obtain or modify plastics.

  • Supercritical extraction of natural compounds from plant and animal material.

  • Chemistry of ammonia in the supercritical state.

  • Hydrogenation processes eg.:

    • hydrogenation of vegetable oils in the presence of a supercritical solvent.
    • hydrogenation of alfa-methylstyrene to cumene.
    • hydrogenation of phenolic tar.
  • High-pressure alkylation of aromatic hydrocarbons with olefins (e.g. benzene, toluene or naphthalene with ethylene or propylene) on solid catalysts, especially shape selectivity zeolites. Alkylation of high temperature melting species (e.g. naphthalene) are carried out without solvent.


Experience

  • High pressure alkylation on stationary bed of catalyst both in the laboratory and semi-technical scale.

  • Other high pressure processes like hydrogenation, isomerization, disproportionation, transalkylation, etc., performed in the reactor with a stationary bed of catalyst.

  • High-temperature supercritical extraction of brown coal, coke oven tar, wood, and other cellulose-containing materials.

  • Supercritical extraction of plant or animal derived material.

  • Purification of polymers by supercritical extraction.

  • Purification (with separation of organic compounds) of industrial water wastes and effluents using supercritical solvents.


Available methods and equipment

  • High-pressure laboratory research unit (1-10 ml) for testing solid catalysts (zeolites) in aromatic hydrocarbons alkylation or other reactions.

  • High-pressure research units enabling scaling up alkylation, hydrogenation or other processes carried pout on stationary bed of catalyst (zeolite).

  • Batch-type apparatus of 0.1 to 10 l volume for the extraction in the solid-supercritical gas system in the temperature range from -10 to 150 deg.C and under pressure up to 300 bar,

  • continuous operation apparatus for extraction in the liquid/suspension-supercritical gas system in the temperature range from 25 to 300 deg.C and under pressure up to 300 bar, up to 20 kg liquid per hour;

  • batch and continuous operation apparatus to study reactions in the supercritical state in the temperature range from 25 to 300 deg.C and under pressure up to 250 bar,

  • three-stage fractionating apparatus to separate extracts from supercritical mixtures in the temperature range from -10 to 150 deg.C and under pressure up to 300 bar.


Contact

Dr. Robert Brzozowski, Chem.Eng., professor of ICRI
phone +48 22 568 20 20, +48 22 568 24 73