Metam sodium synthesis

Yield:137-42-8 99.89%

Reaction Conditions:

with sodium hydroxide at 88; under 14251.4 Torr; for 0.00555556 h;Inert atmosphere;Flow reactor;Large scale;Temperature;Time;Pressure;

Steps:

1-6 Example 4

1. Material preparationPress the carbon disulfide from the storage tank into the carbon disulfide metering tank with nitrogen (it must be ensured that the height of the water used for the liquid seal in the metering tank is not less than 15mm), and the metering tank is set with a low liquid level alarm;Put the monomethylamine solution with a concentration of 40% into the high-level tank, and the metering tank is set with a low-level alarm;The sodium hydroxide solution with a concentration of 32% is poured into the high-level tank, and the metering tank is set with a low-level alarm.2. SynthesisSet the reaction temperature to 88°C, set the material to stay in the reaction channel for 20 seconds, set the reaction pressure to 1.9MPa, and set the high pressure alarm and DCS chain control system.Check the set flow data of carbon disulfide, 40% monomethylamine solution and 32% sodium hydroxide solution from the microcomputer, and check and confirm the process data such as reaction temperature and reaction pressure twice;After checking and confirming that the DCS has set the volume flow of the reaction raw materials, use a metering pump to mix carbon disulfide, 40% monomethylamine solution, and 32% sodium hydroxide solution according to 41ml/min, 56.8ml/min, 61.5ml/min The flow rate of 100% is injected into the inlet of the microchannel reactor from the respective metering tanks at the same time, and the temperature when injected into the microchannel reactor is room temperature, and the reaction temperature is precisely controlled by DCS to carry out the synthesis reaction.Observe the appearance of the generated Weibaimu, and sample and analyze the obtained finished product in time.

References:

CN114853651,2022,A Location in patent:Paragraph 0022-0060