N-Butylthiophosphoric triamide, abbreviated as NBPT, is a nitrogen fertilizer slow-release agent, which is used to improve the utilization rate of nitrogen fertilizer. In the production process of NBPT, the traditional process is to use dichloromethane as the solvent, trichlorothiophosphorus and n-butylamine are substituted, ammonia is introduced into the amination reaction to obtain an amination liquid, and then NBPT is obtained through subsequent processes. However, solid entrainment will occur during the actual operation. Therefore, how to shorten the processing time, improve the separation efficiency, and avoid the occurrence of solid entrainment is of great significance to the industrialization of NBPT.
A large number of experiments have shown that the CWL-M centrifugal extractor is effective in the production of NBPT and is suitable for continuous industrial production.
CWL-M centrifugal extractor is a new, fast and efficient liquid-liquid extraction and separation equipment. The CWL-M series centrifugal extractor launched by Zhengzhou Tiei Extraction Company is developed to address the shortcomings of the current traditional centrifugal extractors. It has independent intellectual property rights. Under the same processing capacity, the power consumption of this series of centrifugal extractors is only 10% to 30% of the traditional annular gap machines. At the same time, the centrifugal extractor has a short stage retention time, rapid phase separation, high extraction efficiency, and saves investment costs and solvent recovery and regeneration costs.
When carrying out the specific operation of n-butylthiophosphoryl triamide extraction, the aminated liquid and the aqueous phase are injected into the centrifugal extractor in a certain proportion. With the help of the rotation of the drum, the two phases are quickly mixed and dispersed through the impeller, and the two-phase liquid is fully transferred to complete the mixing and mass transfer process. The mixed liquid enters the drum under the action of the vortex disk. Under the action of centrifugal force, the two-phase liquid is quickly separated. The clarified two-phase liquid enters the collection chamber through their respective weir plates and is respectively led out of the machine by the guide pipe to complete the two-phase separation process. The separated loaded organic phase and the stripping agent re-enter the centrifugal extractor for stripping in a certain proportion, and the obtained extracting agent is recycled and reused.
In terms of operation, within a certain range of conditions, the centrifugal extractor has ideal mixing and separation effects and can achieve a good extraction rate. However, in actual operation, the equipment needs to be adjusted according to the specific feed liquid system and operating temperature to make the equipment process closer to industrial production.
CWL-M centrifugal extractor is widely used in chemical extraction. For example, centrifugal extractor is needed in extraction, separation, stripping, washing and other processes. If you have any needs in chemical extraction, welcome contact our Zhengzhou Tiei Extraction.
Email: sales@tieiextraction.com
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