Solution for automatic determination of freezing point of low temperature coal tar

February 22, 2021
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Coalitc tar (Coalitc tar) is a kind of main product obtained from coal or oil shale by low temperature dry distillation.
It's a brown oily liquid with a special smell.
The main components are cycloalkanes, alkanes and phenols, etc.
After processing, a variety of liquid fuels and products used as raw materials for chemical industry can be obtained.
Coalitc tar is the main oily product obtained by low temperature dry distillation of coal or oil shale. It is brown and has a peculiar odour. At room temperature, it has a specific weight of about 0.85~1.05.
The main components are naphthene and alkane, through fractionation can be obtained light oil, solar oil, gasoline, lubricating oil and other fractions and residual asphalt.
Can be made into a variety of liquid fuel and chemical industry raw materials.

Freezing point (freezing point) refers to the high temperature of the oil when it is cooled to the point where the liquid level does not move under specified conditions, expressed in ℃.
The determination of freezing point was carried out according to GB/T 510-1983 (1991) "Determination of freezing point of petroleum products".
Suitable for determining the freezing point of dark petroleum products and lubricating oil.
And SH113E1 automatic condensation point detector based on national standard national standard GB/T510 based on petroleum products solidifying point measurement, adopt modern advanced technology, mechanical, optical, electronic and computer technology into an organic whole, can automatically complete the condensation point of petroleum products testing, the instrument adopts photoelectric detection technology, automatic inclined glass tube method, imported compressor refrigeration system to ensure that meet the requirements of refrigeration and depth.
Instruments for the experiment
1.SH113E1 automatic freezing point tester, developed and produced by Shandong Shengtai Instrument Co., Ltd.
2. Conformed to GB/T510 condensation point test tube.

Experimental steps:
First, preparation work
1. After the instrument is unpacked, please count the accessories according to the packing list. If there is any damage, please contact our company.
2. The instrument should be carried vertically, and the tilt Angle along the height of the instrument should not exceed 30 degrees. It should be placed in a dark place and placed smoothly, otherwise there will be vibration after the start of the instrument, which will affect the service life of the instrument.
3, the instrument power supply is connected to the capacity of more than 220V/10A socket, pay attention to must have a good grounding wire.
Second, the experimental process
1. Determination of freezing point: put the rubber plug with the sensor and detector on the test tube, and put the freezing point tube into the freezing point cold filter point bath.
2. Click on the condensation point measurement to enter the interface of condensation point measurement.

3. The main interface of solidification point measurement is shown in the figure above.
The four buttons above are main interface, parameter setting, system setting and historical data respectively.
The main display area is the trend chart of the temperature of the sample over time, which can show the temperature value of the sample and metal bath. The right display area will show the specific value, and the lower part is the experimental results of the expected freezing point and test tube.
In the lower right corner are the start button, tilt button, and close button.
4. After all the preparation work is done, click the "Start" button to carry out the test. During the test, the system will automatically detect the freezing point.