Valine continuous crystallization method
A technology of valine, valine feed liquid, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve problems such as high energy consumption, no literature discloses amino acid crystallization, low efficiency, etc., achieves steam High utilization rate, avoid valine agglomeration, reduce the effect of valine agglomeration
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Embodiment 1
[0019] 1) Adjust the pH of the purified valine feed solution to 8~9, with a content of 4~5%;
[0020] 2) Entering the five-effect evaporator, the fifth effect starts to feed and control the vacuum-0.086MPa, the temperature is 40℃~45℃; it enters the fourth-effect vacuum-0.08MPa~MPa, the temperature is 50℃~55℃; the three-effect vacuum-0.075 MPa, temperature 63°C~67°C; second effect vacuum -0.04MPa~-0.05MPa, temperature 68°C~72°C; first effect vacuum -0.02MPa~-0.03MPa, temperature 85°C~90°C;
[0021] 3) The second-effect feed pipeline is a forced circulation pipeline, the flow rate of the second-effect circulation is 300m3 / h, and the first-effect circulation is 450m3 / h, so as to prevent the material from agglomerating on the tube wall of the falling film evaporator;
[0022] 4) The second-effect pipeline and the first-effect pipeline are equipped with external ultrasonic equipment. When the production is running, the ultrasonic equipment is turned on to prevent the material from ...
Embodiment 2
[0027] 1) Adjust the pH of the purified valine feed solution to 8~9, with a content of 4~5%;
[0028] 2) Entering the five-effect evaporator, the fifth effect starts to feed and control the vacuum -0.09MPa, the temperature is 40°C~45°C; sequentially enters the fourth effect vacuum -0.084MPa, the temperature is 50°C~55°C; the third effect vacuum -0.075MPa, Temperature 63°C~67°C; second effect vacuum -0.04MPa~-0.05MPa, temperature 68°C~72°C; first effect vacuum -0.02MPa~-0.03MPa, temperature 85°C~90°C;
[0029] 3) The second-effect feed pipeline is a forced circulation pipeline, the flow rate of the second-effect circulation is 300m3 / h, and the first-effect circulation is 450m3 / h, so as to prevent the material from agglomerating on the tube wall of the falling film evaporator;
[0030] 4) The second-effect pipeline and the first-effect pipeline are equipped with external ultrasonic equipment. When the production is running, the ultrasonic equipment is turned on to prevent the ma...
Embodiment 3
[0035] 1) Adjust the pH of the purified valine feed solution to 8~9, with a content of 4%;
[0036] 2) Enter the five-effect evaporator, the fifth effect starts to feed the material to control the vacuum -0.086MPa~-0.09MPa, the temperature is 40℃~45℃; enter the four-effect vacuum in turn -0.08MPaMPa, the temperature is 50℃~55℃; the three-effect vacuum -0.075MPa, temperature 63℃~67℃; second effect vacuum -0.04MPa~-0.05MPa, temperature 68℃~72℃; first effect vacuum -0.02MPa~-0.03MPa, temperature 85℃~90℃;
[0037] 3) The second-effect feed pipeline is a forced circulation pipeline, the flow rate of the second-effect circulation is 300m3 / h, and the first-effect circulation is 450m3 / h, so as to prevent the material from agglomerating on the tube wall of the falling film evaporator;
[0038] 4) The second-effect pipeline and the first-effect pipeline are equipped with external ultrasonic equipment. When the production is running, the ultrasonic equipment is turned on to prevent the m...
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