Chemical Reactor For Laboratory

The chemical reactor is a reactor provided for synthesizing chemical substances under certain temperatures and certain pressure conditions. It is widely used in scientific research experiments in new materials, energy, environmental engineering, and other fields, and is a commonly used small reactor for scientific research in teaching and scientific research units in colleges and universities.

In the laboratory, we usually use hydrothermal reactors, which are also known as high-pressure digestion tanks, pressure-dissolving bombs, polymerization reactors, crystallization reactors, etc. The dose synthesis reaction is also used in the strong acid or strong alkali in the tank and in a closed environment of high temperature and high pressure to achieve the purpose of quickly digesting insoluble substances.

The operation process of the chemical reactor can be divided into six steps:

  1. Clean the reactor

Depending on the specific experiment, different reagents are used for physical and chemical cleaning.

    1. Filling material

    The reactants were safely transferred into the reactor in turn.

  1.  Seal the reactor
  •  Heating up, keeping warm, cooling down
  • Open the reactor
  • Take out the material

Precautions for the use of chemical reactors

Sealing performance

The reaction kettle is precision equipment. The sealing ring adopts the form of conical contact and sealing, and the main bolts are tightened to make them press each other to achieve the purpose of sealing. Therefore, special care must be taken for the sealing cone to avoid damage caused by various collisions. When installing the cover, first place the chemical reaction kettle body, and then put the reaction kettle cover in a fixed position and carefully install it on the reaction kettle body. When tightening the main bolts, you must tighten them diagonally and symmetrically. , The force should be uniform, and it is not allowed to tilt the reaction kettle cover to one side to achieve a good sealing effect, and the specified tightening torque should not be exceeded to prevent the sealing surface from being squeezed or accelerated wear. All threaded connections need to be coated with oil or oil-mixed graphite when assembling. If the sealing surface is damaged, it needs to be reworked and repaired to restore good sealing performance.

Sealing operation

The air inlet and exhaust valve of the chemical reaction kettle are sealed with a needle valve. When closing, just turn the valve needle gently and press the cover tightly to achieve a good seal. It is forbidden to use excessive force to avoid damage to the sealing surface.

Temperature rise and pressure test

The chemical reaction kettle should be heated, pressurized, and sealed before use. The test medium can be air or nitrogen, but it is best to use inert gas. It is strictly forbidden to use oxygen or other flammable and explosive gases. The temperature increase and pressure increase must be carried out slowly. The heating rate is not more than 80 degrees/hour. During the pressure test, connect the inlet valve of the chemical reactor with the compressor (or high-pressure pump) with a connecting pipe. The pressure increase must be carried out in stages, with 20% of the working pressure as the interval, stay for 5 minutes for each liter level, and stay for 30 minutes when the test pressure is raised to check the sealing condition. The test pressure is 100-105% working pressure. If a leak is found, the pressure should be reduced first, and then the nut and joint should be properly tightened. It is strictly forbidden to tighten the nut and joint under high pressure.

Cooling process

Rapid cooling and rapid heating are prohibited in the reaction process to prevent excessive temperature stress from causing cracks in the reactor body. After the reaction is over, firstly cool down, which can be cooled by water (exothermic reaction) or air-cooled, and then release the high-pressure gas in the reaction kettle to reduce the pressure to normal pressure, and then loosen the bolts symmetrically and evenly. In the process of opening the lid, special attention should be paid to protecting the sealing surface, and the reaction kettle lid should be lifted evenly to avoid damage to the sealing ring of the reaction kettle lid and the kettle body due to collision.

Follow-up processing

After each operation, the residues on the kettle body and the kettle cover should be removed. All sealing surfaces on the chemical reaction kettle should be cleaned frequently and kept dry. Hard objects or soft objects with rough surfaces are not allowed to be cleaned.

Maintenance of laboratory reactor

Regularly check to ensure that safety valves, explosion-proof membranes, pressure gauges, thermometers, and other safety devices are accurate, sensitive, and easy to use. The red line of the pressure gauge must be correctly drawn, and the explosion-proof membrane must not have internal leakage;

  • Ensure that there is no abnormal vibration and noise in the chemical reaction kettle;
  • Check the start-up temperature of the reducer, motor, base bearing, and other parts: the general temperature is ≤ 40°C, and the maximum temperature is ≤60°C (the back of the hand can stay on the top for more than 8 seconds, which is normal).
  • Ensure that all the inlet and outlet valves of the chemical reaction kettle are in good condition and available, and any problems must be dealt with in time;
  • The flange and base of the chemical reaction kettle should not have loose bolts, and the safety shield should be intact and reliable;
  • The body of the chemical reaction kettle should not have cracks, deformation, bulging, perforation, corrosion, leakage, etc.;
  • l Do a good job in the sanitation of the chemical reaction kettle to ensure that there is no oil pollution and the equipment is in its true colors;
  • Regularly check the stirring of the chemical reaction kettle, coils, and other accessories in the pot, tighten the loose bolts, and replace the relevant parts if necessary.

Copyright Notice :
This article only represents the author’s point of view.
This article is published under the authorization of the author.
Source: Franli

This article address : Chemical Reactor For Laboratory

Related Products

High Shear Mixer
all

High Shear Mixer

High Shear Mixer is to disperse one or more phases into another continuous phase through efficient, fast, uniform and other processes, and under normal circumstances each phase is insoluble.

Contact ➔
lab three roll mill(ointment mill)
all

Ceramic Three Roll Mill

The ceramic three roller mill mainly uses the surface of three rollers to grind and disperse at different speeds to make the ground material reach the required grinding fineness. The three roller mill is suitable for the grinding of ink, paint, paint, lipstick, chocolate, soap, and other materials, and it is mainly composed of a roller, a machine base, a guide cover, a discharge knife plate, a feeding copper knife, a cooling system, etc. The fineness of the material grinding can be adjusted by the screw on the base.

Contact ➔
bead mill
all

Turbine bead mill

FRANLI turbine bead mill is a kind of nano mill, which is mainly used in medicine, food industry, agrochemicals, cosmetics industry, papermaking, life sciences, microbiology, fillers, and other industries.

Contact ➔

News

A Complete Guide to Ointment Mill

The ointment mills are largely used by the pharmaceutical industry, where color changes and smaller batches are needed. The mills use a strong shear force for dispersing active ingredients, and the ointment mill is popular due to its perfect cooling surface and temperature control.

How to derive the maximum benefits out of a kneader

The kneader for the dispersion process is supplied by the manufacturers offered uniformity in the compound that is being dispersed along with the fast washing of the product for the adjustment of color.

Grinding media for sand mills

Sand mill is a kind of high-efficiency grinding equipment, which is mainly used for grinding materials, and the particle size of the final grinding can reach the nanometer level.

Horizontal sand mill: Efficient, Safe, High Grinding

Horizontal sand mill is suitable for grinding and creating medium-viscosity liquid materials such as paints, inks, pigments and dyes, medicines, cosmetics, food, papermaking, electronic materials, etc. Horizontal sand mills are suitable for high viscosity, small fineness, volatile materials, and closed grinding.

Wet grinding equipment – sand mill

Sand mill is an indispensable piece of equipment in the coating industry and chemical industries. It can not only be used to grind products with large particles, but also very fine products, which can reach the nanometer level at least.

New Grinding Equipment – Nano Sand Mill

Nano sand mill is a new type of grinding equipment, mainly used in carbon nanotubes, nanomaterial pigments, nanocoatings, inks, inkjet inks, cosmetics, food, proteins, lithium batteries, functional ceramics, photovoltaic materials, and other fields.

Leave a Reply

Your email address will not be published. Required fields are marked *