How to choose a suitable supercritical co2 extraction machine?

The special solubility of critical fluids has been observed for more than 100 years, when the supercritical co2 extraction machine began to appear. With the development of science and technology, various supercritical co2 extraction machines have been put into use. This article mainly introduces how to choose a suitable supercritical co2 extraction machine.

The following knowledge points are listed below:

Selection of supercritical co2 extraction machine

Selection of extraction solvent for supercritical co2 extraction machine

Precautions for using the supercritical co2 extraction machine

Selection of supercritical co2 extraction machine:

When purchasing the supercritical co2 extraction machine, please pay attention to check the packing list of the extraction equipment. The main components of the supercritical co2 extraction machine include extraction kettle separation kettle, co2 buffer tank, co2 plunger pump, carrier tank, carrier pump, cold water tank, material bucket, rack, touch control screen, internal connection pipelines and valves, etc., Check carefully to see if the components of the supercritical co2 extraction machine are fully equipped when they leave the factory.

Selection of extraction solvent for supercritical co2 extraction machine

Not all solvents are suitable for supercritical co2 extraction machine. Supercritical fluid extraction has the following requirements (1) for solvent solubility. There is a certain hydrophilic - hydrophilic balance;Can be easily separated from the solute, no residue, does not affect the solute quality;(3) non-toxic, chemically inert, and stable;Abundant sources, cheap prices;(5) high purity.

In the research of the supercritical fluid material, only a few suitable for supercritical fluid extraction solvent: carbon dioxide, ethane, ethylene, as well as a few hydrogen fluoride compounds, one of the most ideal solvent is carbon dioxide, it almost meet all of the above requirements, its strong critical pressure is 7.38 MPa, the critical temperature of 31.16 ℃, now almost all of the supercritical co2 extraction machine operation with co2 as solvent, its main features are:

(1)     volatile, easy to separate with solute;

(2)     Small viscosity, high diffusion coefficient, a high mass transfer rate;

(3)     Only the low molecular weight of less than 500 in the compound is soluble in carbon dioxide;

(4)     medium and low molecular weight halides, aldehydes, ketones, esters, alcohols, ethers are easily soluble in carbon dioxide;

(5)     Polar organic compounds only low molecular soluble in carbon dioxide;

(6)     Fatty acids and triglycerides are not soluble in carbon dioxide, but the single esterification can increase the solubility;

(7)     Solubility in homologues decreases with increasing molecular weight;

(8)     Alkaloids, carotenoids, amino acids, hydroxy acids, chloroform and most inorganic salts are insoluble in carbon dioxide

Precautions for using the supercritical co2 extraction machine:

(1)     supercritical co2 extraction machine shall be manufactured, inspected and accepted according to the pharmaceutical equipment industry standard "supercritical co2 extraction device";Has a number of patented technologies;

(2)     the industrial supercritical co2 extraction machine is designed with an advanced co2 injection and recovery system to reduce co2 loss, reduce production costs and improve the environment;

(3)     the supercritical co2 extraction machine adopts computer automatic remote control to automatically control the process parameters such as excitation, temperature and flow rate of each station, with high degree of automation and good process repeatability;

(4)     the supercritical co2 extraction machine for small and medium scale test adopts touch screen control to automatically control temperature, flow and other parameters;

(5)     the supercritical co2 extraction machine is designed with a reasonable extraction kettle and separation gold combination, and advanced series and parallel separation technology, which improves the output and extraction rate.

(6)     the supercritical co2 extraction machine adopts the safety interlock mechanism of safety valve, electric contact pressure gauge and excitation transmitter to ensure the safe operation of the system;

(7)     the supercritical co2 extraction machine adopts an advanced clamping automatic lid opening mechanism (industrial device), and the lid opening and closing are automatically completed by the hydraulic system;

(8)     the complete set of supercritical co2 extraction machine is made of stainless steel, with beautiful appearance, which meets the requirements of the food and pharmaceutical industries and conforms to GMP; The entrainment agent system is designed.

We hope this article has been helpful in your understanding of the supercritical co2 extraction machine. If you need a supercritical co2 extraction machine, please contact us.