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.

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.

A polymer containing a carboxyl group, a preparation method and an application thereof, a supported catalyst and a preparation method thereof and preparation methods of penem antibiotic intermediate are disclosed. The polymer has high rigidity and hardness, thus the mechanical properties of the polymer is effectively improved. Meanwhile, in the polymer, the carboxyl group is used as a main functional group, and is used as a carrier to prepare, by means of a coordination reaction between the carboxyl group and a heavy metal, a supported metal catalyst which has better connection stability between the metal and the polymer. The above two factors can improve the stability of the supported metal catalyst, such that the catalyst can be recycled without losing the catalytic activity. Meanwhile, loss of a heavy metal active ingredient and production cost can be reduced.