Descriptions of Hydrothermal synthesis reactor
Hydrothermal synthesis reactor are laboratory equipment used for hydrothermal synthesis reactions to synthesize high-performance materials such as nanoparticles, crystals, and thin films through high-temperature, high-pressure environments. Main functions and features, including: high temperature and high pressure environment; synthesizing high performance materials; materials with special properties; laboratory equipment; hydrothermal synthesis process.
The cleaning of the hydrothermal synthesis reactor liner is essential because the contamination of the reactor liner will affect the efficiency of the reaction and the quality of the product. The following are some common ways to clean the lining of a hydrothermal synthesis reactor:
1、New kettle heating
Add appropriate amount of water or alkali in the liner.
Put the hydrothermal synthesis kettle into the heating equipment after manually tightening it.
Do not heat up quickly (the rate of temperature rise and fall is not more than 5℃/min), and the temperature should not be too high (generally heating to 200℃ can be).
2、General operation steps
For the obvious solid dirt in the liner of hydrothermal synthesis reactor, we can clean it with water and brush first, and then brush and decontamination powder to remove all the visible solid dirt, and then alcohol brushing, and then acetone brushing, to remove the organic dirt, and then wash dry or drying, drying box for preservation.
Difficult to clean the dirt can try the corresponding can react with the dirt of dilute acid or dilute alkali and so on dissolved or heated dissolved and cleaned, and then sequentially add water, alcohol and acetone cleaning, drying and preservation.
We manually tighten the hydrothermal synthesis reactor, put it into the heating equipment heated to 200 ℃, turn off the power to stop heating, cool to room temperature, and then use water, alcohol, acetone, etc., in turn, brushing, drying, preservation.
Hydrothermal synthesis reactor lining cleaning methods
According to the hydrothermal synthesis kettle reaction medium different selection of different cleaning methods
We use a silicon system as the catalyst for the hydrothermal synthesis reactor and add hydrofluoric acid or alkali for heating and washing. For the silicon metal system, we use aqua regia for cleaning. We dissolve potassium permanganate in water, add 3-5ml of concentrated hydrochloric acid, seal it in the reactor, and perform a hydrothermal reaction at 180 ℃ for 5-10 hours.
Laboratory commonly used hydrothermal synthesis reactor liner cleaning method
Use aqua regia to clean (aqua regia: concentrated nitric acid and concentrated hydrochloric acid three to one ratio).
We clean the liner (hydrothermal synthesis reactor accessories) by adding a mixed solution of approximately 1:5 nitric acid and water, heating it up to 180 ℃, and maintaining it for approximately 12 hours, adjusting the ratio of the mixed solution and the temperature as needed. However, the defect of this method is that it will make the repeatability of the experiment worse.
Boil with oxalic acid solution for 6 hours at a temperature of about 160 degrees depending on the experiment.
Use hydrofluoric acid or ethanol to heat the reaction for cleaning, or use other strong acids.
We must exercise caution when handling all of the above methods and ensure that they are carried out in a well-ventilated environment to avoid any potential risks.
Precautionary
When cleaning the reactor liner, you need to pay attention to the following matters:
The valve and power supply of the reactor need to be closed before cleaning.
Use suitable cleaning agent and cleaning method when cleaning.
Thoroughly rinse the reactor liner after cleaning.
After cleaning, you need to check whether the reactor liner is clean or not, if it is not clean, you need to re-clean it.
