2results about How to "Simple pretreatment process" patented technology

A highly efficient composite catalyst for the Michael addition reaction and its application method are disclosed, relating to the field of catalytic chemistry. The composite catalyst comprises a main catalyst system, a co-catalytic modifier, and a reaction terminator. The main catalyst system is a composite of Lewis base catalyst A and metal salt catalyst B. The co-catalytic modifier works synergistically with the main catalyst system to enhance catalytic performance. In application, through steps such as raw material pretreatment, catalyst preparation, isothermal dropwise addition, temperature-controlled reaction, and termination treatment, this composite catalyst is used in the Michael addition step of the synthesis of 2-chloro-5-chloromethylpyridine, achieving synergistic optimization of catalytic activity and selectivity, providing a reliable technical solution for the efficient synthesis of related pesticide intermediates.

The utility model discloses a household garbage and stale garbage synergistic treatment system which comprises a stale garbage feeding hopper, a double-layer roller dryer, a crushing and conveying assembly and a stale garbage discharging hopper. The double-layer roller dryer comprises an outer cylinder and an inner cylinder, the inner cylinder is embedded in the outer cylinder, and the two ends of the inner cylinder are connected with the stale garbage feeding hopper and the stale garbage discharging hopper correspondingly so that stale garbage can enter and exit from the inner cylinder; a spiral conveying assembly is arranged in the inner cylinder so that stale garbage can move in the inner cylinder. A dead steam inlet and a dead steam outlet are formed in the two ends of the outer cylinder correspondingly, dead steam is introduced from the steam turbine side, and stale garbage is dried; dry stale garbage output by the stale garbage discharging hopper is conveyed to the crushing and conveying assembly, is crushed and then is conveyed into the garbage incinerator to be mixed with household garbage for combustion. The device has the advantages of convenience in use, high treatment efficiency, low cost and the like, and solves the problem that the treatment cost of stale garbage is high due to the fact that the existing equipment is too complicated.