Teflon lined hydrothermal autoclave is a closed container that can decompose insoluble substances. It can be used for pretreatment of dissolved samples in the analysis of atomic absorption spectroscopy and plasma emission; it can also be used for small-dose synthesis reactions; it can also use the strong acid or strong alkali in the tank and the high temperature and high pressure airtight environment to achieve the purpose of rapidly dissolving insoluble substances . It is a powerful assistant for digesting samples when determining trace elements and trace elements. It can be used in the determination of lead, copper, cadmium, zinc, calcium, manganese, iron, mercury and other heavy metals. It can also be used as a high-pressure, anti-corrosion and high-purity reaction vessel, as well as organic synthesis, hydrothermal synthesis, crystal growth or sample digestion. extraction etc. Digest heavy metals, pesticide residues, food, sludge, rare earth, aquatic products, organic matter, etc. before sample pretreatment. Therefore, it is used in research and production in petrochemical, biomedical, material science, geochemical, environmental science, food science, commodity inspection and other departments.
Features of Teflon lined hydrothermal autoclave:
1. With explosion-proof function, the shell is made of high-quality 304 stainless steel, which has good corrosion resistance, no harmful substance spillage, less pollution and safe use.
2. Rapid and non-destructive dissolution of samples that are difficult to dissolve under normal conditions, and samples containing volatile elements after temperature and pressure increase.
3. Beautiful appearance, reasonable structure, simple operation, short analysis time and reliable data.
4. High temperature resistance: -200℃~240℃, pressure: 0~6MPa.
5. The internal material is polytetrafluoroethylene, which has the characteristics of acid and alkali resistance.
6. After the stirring tank is heated and pressurized, it can quickly and non-destructively dissolve some reagents that are difficult to dissolve under normal conditions and reagents containing volatile elements.
Advantages of Teflon lined hydrothermal autoclave:
·High temperature resistance: operating temperature 200~ +250*C;
·Low temperature resistance: 5% can be maintained at -196°C;
·Corrosion resistance: resistant to strong acid, strong alkali, aqua regia and various organic solvents;
·Insulation resistance: dielectric properties have nothing to do with temperature and frequency;
·High lubrication: the lowest friction coefficient among solid materials;
·Non-adhesive: does not adhere to any substance; strong self-lubricating property: the coefficient of friction in solid materials is 0.04
·Non-toxic: It is physiologically inert and can be implanted in the human body; aging resistance can be used in the atmosphere for a long time
·Anti-pollution: the blank value of metal elements is low, the lead content is less than 10-11 g/ml, and the uranium content is less than 10-12 g/ml;
·Leak-proof: Drop from 1.2 meters above the ground, the bottle body will not break, the cap will not fall off, and there will be no damage or leakage.
How to use the Teflon lined hydrothermal autoclave:
·Pour the reactants into the PTFE bushing or PPL bushing, and ensure that the feeding coefficient is less than 0.8.
·Make sure that the lower gasket of the autoclave body is in the correct position (the convex side is facing down), then put in the Teflon bushing or PPL bushing and the upper gasket, first tighten the kettle cover, and then use the screw to screw the autoclavebcover
·Put the teflon lined hydrothermal autoclave in the heater, and raise the temperature to the required reaction temperature according to the specified heating rate. (Less than the specified safe operating temperature.
·After confirming that the temperature in the abdomen is lower than the boiling point of the solvent of the reactant system, the lid of the autoclave can be opened for subsequent operations. When the reaction is finished and the temperature is lowered, it is also necessary to operate in strict accordance with the prescribed cooling rate.
·After confirming that the temperature in the abdomen is lower than the boiling point of the solvent of the reactant system, first use the screw to loosen the lid of the kettle, and then open the lid of the kettle.
·Clean the hydrothermal synthesis reactor in time after each use to avoid rust. Special attention should be paid to cleaning the line seals of the autoclave body and the kettle cover, and it should be strictly prevented from being damaged by bumps.
1. What are the models of teflon lined hydrothermal autoclave?
KH-15, KH-25, KH-30, KH-50, KH-100, KH-150, KH-200, KH-250, KH-300, KH-400, KH-500, KH-1000, etc.
2. What is the operation method of the teflon lined hydrothermal autoclave?
The teflon lined hydrothermal autoclave refers to the autoclave body, and the feed coefficient is less than 0.8. When the reactant system is corrosive, it should be placed in a teflon lined to ensure that the kettle body is not corroded. Put the synthesis autoclave in the heater, and raise the temperature to the required reaction temperature according to the prescribed heating rate. When the temperature is lowered after the reaction is completed. After confirming that the temperature inside the abdomen is lower than the boiling point of the reactant solvent, the lid of the autoclave can be opened for subsequent operations. The reactor should be cleaned in time after each use to avoid corrosion.
3. What is a teflon lined hydrothermal autoclave?
The teflon lined hydrothermal autoclave refers to the substance synthesized by chemical reaction in aqueous solution at a temperature of 100-1000°C and a pressure of 1MPa-1GPa. Under subcritical and supercritical hydrothermal conditions, due to the reaction at the molecular level, the reactivity is enhanced, and the hydrothermal reaction can replace part of the high-temperature solid-state reaction. And because the homogeneous nucleation and heterogeneous nucleation mechanisms of hydrothermal reactions are different from the diffusion mechanisms of solid-state reactions, it can create new compounds and new materials that cannot be prepared by other methods.