Introduction of distillation principle and temperature cycle control device
Distillation is a common method for purifying liquid substances and separating mixtures. The boiling point of the compound can also be measured by distillation, so it also has a certain significance for the identification of pure liquid organic compounds.
The change of saturated vapor pressure of a substance at different temperatures is the basis of distillation separation. Heating the liquid to boiling makes the liquid into a vapor, and then the vapor is cooled and then condensed into a liquid. The combined operation of these two processes is called distillation.
The boiling points of the components of the liquid mixture must be very different, at least above 30 ° C to achieve a better separation effect. Select the heating device according to the boiling point of the distilled liquid. When the boiling point of the distilled liquid is below 80oC, use a hot water bath to heat; when the boiling point of the liquid is above 100 ° C, use a simple air bath or an oil bath to heat the asbestos mesh When the temperature is above 200 ° C, use a sand bath, an air bath and an electric heating mantle.
In the distillation operation, the following points should be noted:
(1) Control the heating temperature. If a heating bath is used, the temperature of the heating bath should be several degrees higher than the boiling point of the distilled liquid, otherwise it will be difficult to distill the distillate. The more the heating bath temperature is higher than the boiling point of the distilled liquid, the faster the distillation speed. However, the temperature of the heating bath should not be too high, otherwise it will cause the vapor pressure of the distillation flask and the upper part of the condenser to exceed atmospheric pressure, which may cause accidents, especially when distilling low-boiling substances.
The temperature should be strictly controlled during distillation because things that are too low can not be steamed out, and those that are too high can be steamed out, and may also cause the decomposition of the required substances, or the decomposition of undesired substances to generate new impurities! Prolonging the time can make the distillation process more adequate.
LNEYA dynamic temperature control system SUNDI series temperature range is -120 ℃ to 350 ℃, superior performance, high precision, intelligent temperature control. Fully enclosed system, extending the thermal conductivity of the liquid, a very wide temperature range, without changing the liquid medium. The ultra-high temperature cooling technology can directly cool from the high temperature of 300 degrees. The temperature difference between the jacket oil and the raw material process can be set separately to control the process temperature and jacket temperature separately.
January 11, 2018Industrial Chiller：Industrial Chiller varies from dynamic temp. Special Chiller：Special Chiller consist of Multi-reactor chiller (TCU).Environmental Chamber：The test object is connected to a testing adapter. Industrial Freezer：Industrial freezer consist oview
July 4, 2018What are the characteristics and functions of ultra low freezer: 1. Ultra low freezer can prevent the precision of machine equipment from being influenced by the change of oil temperature in the proce...view
July 4, 2018The refrigeration system of cold plate freezer adopts secondary super-cooler technology with the rapid refrigeration and low limiting temperature. It uses imported brand name semi-hermetic piston comp...view
July 4, 2018Guanya is a leading role in heating cooling circulator. It provides the customers with proposal and technology of controlling the cold and heat, temperature control system with stable property, extend...view
January 11, 2018Temperature ranges from - 5 ~ - 150 ℃, can meet different temperature; Adopt environmental protection refrigerants; Famous brand semi-closed piston compressor, semi-closed bipolar piston compressor, semi-hermetic screw compressor, main brand are BOCK.view
April 10, 2018Working temperature range from -25℃to 200℃, other temperature range need to set to the widest temperature range(-50℃to 250℃)
Centralized control of 2~20 reactors, each reactor's and jacket temperature can be set independently. One system control multipleview
April 10, 2018A set of cooling heat exchanger, heat exchanger, through proportional adjusting valve control cold heat into the heat exchanger, then through the uniform medium input to the reactor jacketed to do heat exchange and temp. Control, system has inside expansiview
April 10, 2018Low Temperature Cooling Chiller LT model: LT-5018N，LT-5040N，LT-5062N，LT-5090N，LT-50A1N，LT-50A2N; Medium Temperature Range: -45℃～30℃. ASET multifunctional controller, control outlet temperature of water tankview
February 28, 2019Temperature control range：-85 ° C ~ 200 ° CPower range：2.5kW~25kWTemperature control accuracy：±0.3°CModelTES-8525WTES-8555WTES-85A10WTES-85A15WTES-85A25WTemp. Range-85℃～200℃-85℃～200℃-85℃～200℃-85℃～200℃-85℃～200℃Heating P...view