Through after this research topic thorough research, discovered still had some technical questions also to wait for further studies or the consummation,Specially big industrial production to equipment high request, also will cause to this topic findings to carry on the unceasing revision and the consummation, these work also will continue.
The chain operation using the modernization big industrial production principle,takes scale benefit as a goal. This management form used by many enterprises of our country in the last few years,and has obtained the fast development.
The chain operation using the modernization big industrial production principle,takes scale benefit as a goal.This management form used by many enterprises of our country in the last few years,and has obtained the fast development.The key reason of the chian operation has the formidable attraction and the very high success ratio is core competence.The rose further of china operation has also facilitated core competence sharing.The chain operation is the effective way which the private ente...
OBJECTIVE Improving traditional synthesis method of Cetirizine Hydrochloride to optimize industrial production technique.METHODS The intermediate 1 was synthesized via the friedel-crafts reaction between chlorobenzene and benzoyl chloride. Then the carbonyl was reduced to hydroxyl under the system of zinc-NaOH. And the key intermediate was produced via the reaction with PCl_3,and then through three steps of condensation reaction and one step of salt forming reaction the end compound was prepared...