Automatic determination of benzene crystallization point solution
The detection of benzene crystallization point is a characteristic index of purity test of general industrial products.
In the low temperature cooling process, the pure liquid may appear too cold state, namely when at or below the temperature of crystallization point, the material is still in a liquid state without precipitation crystallization to coagulation state, the main reason is due to the static in the liquid, no enough seed formation, although reach even below the crystallization temperature at this moment, but not in crystallization. When there is proper agitation in the system, enough seeds appear to promote crystallization with the cooling process.
Therefore, when determining the crystallization point of benzene, it will be specified in the operation process that the cooling operation is carried out, and at the same time, the liquid of the benzene sample is appropriately stirred. Without stirring, the measurements will be low, and abnormal temperature increases may occur during the measurement process.
Standard GB/T3145-1982 determination of benzene crystallization point, GB/T 3069.2-2005 determination of naphthalene crystallization point, GB/T 3710-2009 determination of industrial phenol, phenol crystallization point, Determination of crystallization point of organic chemical products and determination of crystallization point of chemical reagents GB/T7533-1993-2005 Determination of crystallization point of plasticizer. (Benzene crystallization point meter, phenol crystallization point meter, phenol crystallization point meter, freezing point meter, plasticizer crystallization point meter)
Instrument features: using embedded system design, automatic testing of the whole process; Adopt imported PT100 sensor and imported temperature control system. Color touch screen; The test results can be stored; You can view historical data; The results can be printed on the instrument and automatically stirred by the machine. The experimental results can be exported through the U disk and stored in the computer for many times.
Instrument for experiment
1.SH406B automatic measuring instrument for benzene crystallization point, shandong Shengtai Instrument Co., LTD.
2. Comply with GB/T3145.