What is the crystallization point of pure benzene?
With what tests?
Crystallization point is one of the important physical constants of a substance. The crystallization point of a pure substance is fixed, but the crystallization point decreases if it contains impurities. Therefore, the purity of a substance can be judged by measuring the crystallization point.
The crystallization point of pure benzene is 5.53℃.
The average crystallization point of coking benzene in a factory is 4.84℃, indicating that the impurity content of coking benzene is high.
The coking benzene sample was taken for chromatographic composition analysis, and the analysis results were shown in the figure below.
The pure benzene content is 98.16%, the impurity content is 1.84%, and the impurity type is more than 13 kinds.
SH406B automatic crystallization point tester (Shandong Shengtai Instrument Co., Ltd. R & D and production) applicable to the standard GB/T3145-1982 benzene crystallization point determination, GB/T 3069.2-2005 naphthalene crystallization point determination, GB/T 3710-2009 industrial phenol, phenol crystallization point determination,
Determination of crystallizing point of organic chemical products and chemical reagents
Plasticizers -- Determination of crystallinity point
(benzene crystallization point meter, phenol crystallization point meter, phenol crystallization point meter, freezing point meter, plasticizer crystallization point meter)
II. Compliance with standards:
1. Upgraded to 7-inch TFT color LCD display;
2. Refrigeration mode: fully enclosed and efficient refrigeration compressor.
3. Number of experimental groups: 1 group (2 groups can be customized).
4, detection mode: imported PT100 temperature sensor
5, after the upgrade can store historical data, convenient query;
At the same time can be equipped with U disk output function.
6, standard micro printer automatic measurement automatic printing
7. After the completion of the test, if there is no personnel to operate, set the automatic closing time of the refrigerator within 0-50min to avoid frequent opening of the compressor and prolong the service life of the instrument.
8, Include laser printer interface, can be linked to HP1108 laser printer (optional).
9, with date password setting function.
10, standard micro printer automatic measurement automatic thermal printing
11, with TCP network transmission function
12. Can upload and connect to LIMIS system