Abstract: The disclosure provides a new crystal form of ertapenem sodium and preparation method therefor. The new crystal form of ertapenem sodium has 27 principal characteristic peaks in an X-ray powder diffraction diagram. The crystal form of ertapenem sodium of the disclosure has a rod-like crystal habit, which has a large particle size, is not prone to aggregation and is easier to dry, and a product with high crystallinity and high purity may be obtained by simple drying treatment. Meanwhile, the crystal form of the disclosure has better stability, and the crystal form may remain unchanged to a maximum extent in subsequent washing and drying processes, thereby further improving the purity of the product.

Abstract: An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is utilized to adjust the splitter of an operating coal/mineral spiral based on the readings of the sensor. The device as described and claimed herein converts a traditional coal spiral to an automated system for controlling the splitter thereby giving the spiral unit the ability to automatically adjust a key process variable, i.e., its splitter position, in real time as and when the feed coal or other mineral property changes to maintain the performance of the spiral at the optimum level.

Abstract: An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is utilized to adjust the splitter of an operating coal/mineral spiral based on the readings of the sensor. The device as described and claimed herein converts a traditional coal spiral to an automated system for controlling the splitter thereby giving the spiral unit the ability to automatically adjust a key process variable, i.e., its splitter position, in real time as and when the feed coal or other mineral property changes to maintain the performance of the spiral at the optimum level.