公开(公告)号：EP3715321A1

公开(公告)日：2020-09-30

申请号：EP20162294.1

申请日：2020-03-11

申请人： Shanghai Rolechem Co., Ltd.

发明人： Shen, Fengfeng

IPC分类号： C01B21/086 ,  C01B21/093 ,  H01M10/0525 ,  H01M10/0568

摘要： The present disclosure provides a method for preparing a bisfluorosulfonylimide salt, which includes the following steps: S1: reacting an N-alkyl substituted bisfluorosulfonylimide and a salt in a solvent system to obtain a crude product; and S2: crystallizing and drying to obtain a bisfluorosulfonylimide salt. In the present disclosure, no water is generated during the reaction, the N-alkyl substituted bisfluorosulfonylimide is stable in nature, no corrosive substances are generated during the entire reaction, and there are fewer three wastes, which makes the present disclosure suitable for large-scale production, and enables a high-purity battery-grade bisfluorosulfonylimide salt to be obtained; therefore, the present disclosure has great implementation value and social and economic benefits.

公开(公告)号：EP3825278A1

公开(公告)日：2021-05-26

申请号：EP20180159.4

申请日：2020-06-16

申请人： Shanghai Rolechem Co., Ltd.

发明人： Yang, Bin ,  Shen, Fengfeng

IPC分类号： C01B21/06 ,  C01B21/086 ,  C07F1/02 ,  H01M10/0525 ,  H01M10/0568

摘要： The present invention relates to the technical field of additives to an electrolytic solution of salt batteries; in particular, the present invention relates to a method for preparing a high-purity bisfluorosulfonylimide salt. The preparation raw materials include at least bisfluorosulfonylimide, and M + n X n- ; wherein M is selected from any one of Li, Na, K, Rb and Cs, X is an anion including at least one element of B, O, N, P and Si, and n≥2. In the method for preparing a bisfluorosulfonylimide salt provided by the present disclosure, a conversion rate for a target product is high, there is only a single reaction product with almost no side reactions, and the purity of the product is high; during the implementation, there is substantially no generation of the "three wastes", and the byproducts and solvent can be recycled.

公开(公告)号：EP3734736A1

公开(公告)日：2020-11-04

申请号：EP20170297.4

申请日：2020-04-20

申请人： Shanghai Rolechem Co., Ltd.

发明人： LIU, Jun ,  ZHANG, Dongquan

IPC分类号： H01M10/052

摘要： The present disclosure relates to the technical field of preparing a lithium battery electrolyte; in particular, the present disclosure relates to a method for granulating a lithium battery electrolyte. The method for granulating a lithium battery electrolyte includes the following steps: step 1: putting an electrolyte into an extrusion granulator from a hopper to obtain particles by extrusion; step 2: using a filtering sieve for vibration sieving to sieve out electrolytes with a particle size larger than a sieve pore size; and step 3: transporting the sieved-out electrolytes into a stirring drum through a conveyor belt for stirring and mixing again, extrusion-granulating the particles, followed by packaging and storing in a warehouse. In the present disclosure, an electrolyte with uniform particle size is obtained by extrusion granulation, which has good roundness of granulated particles and high particle strength, and which can be conveniently packaged; material feeding is convenient during the preparation of the electrolytic solution, heat release during dissolution is reduced, dust is reduced, and the convenience is greatly improved.

公开(公告)号：EP3705470A1

公开(公告)日：2020-09-09

申请号：EP20020112.7

申请日：2020-03-09

申请人： Shanghai Rolechem Co., Ltd.

发明人： Shen, Fengfeng

IPC分类号： C07C303/38 ,  C07C311/48

摘要： The present disclosure provides a method for preparing a bistrifluorosulfonylimide salt, which includes the following steps: S1: using primary amine and trifluoromethylsulfonic anhydride to prepare the corresponding N-alkyl substituted bistrifluoromethylsulfonylimide; S2: reacting the N-alkyl substituted bistrifluoromethylsulfonylimide with a salt to obtain a crude product; and S3: crystallizing and vacuum-drying the crude product to obtain a bistrifluoromethylsulfonylimide salt. The present disclosure has the following advantageous effects:, the N-alkyl substituted bistrifluoromethylsulfonylimide is stable in nature, no corrosive substances are generated during the entire reaction, and there are fewer three wastes, which makes the present disclosure suitable for large-scale production, and enables a high-purity battery-grade bistrifluoromethylsulfonylimide salt to be obtained; therefore, the present disclosure has great implementation value and social and economic benefits.