Abstract

Provided are a process and a device for preparing an environmentally-friendly insulating gas perfluoroalkylnitrile. The device comprises a first tank reactor, a second tank reactor, and a fixed bed reactor. A condensing and collecting device is provided at the top of the first tank reactor, a collecting and guiding channel at the bottom of the condensing and collecting device is connected to an inlet of a storage tank, and an outlet of the storage tank is connected to an inlet of the second tank reactor. The second tank reactor is connected to a perfluoroolefin tank. An outlet of the second tank reactor is connected to a storage gasification tank. The storage gasification tank is connected to a carrier gas tank, and an outlet of the storage gasification tank is connected to an inlet of the fixed bed reactor. The present invention starts from cyanuric chloride and perfluoropropylene, and uses two tank reactors and a fixed bed reactor to realize production with high atom economy. The preparation method has simple reaction conditions, high atom economy, low cost, and is continuous and enables scale production.

IPC Classes  ?

• C07C 253/00 - Preparation of carboxylic acid nitriles
• C07C 255/10 - Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms containing cyano groups and halogen atoms, or nitro or nitroso groups, bound to the same acyclic carbon skeleton

Abstract

The present application discloses a process and an industrialized production device for co-production of environmentally friendly insulating gases. The co-production process comprises: 1) conducting a contact reaction of oxygen and HFP in a first fixed-bed reactor in the presence of a catalyst or without a catalyst; 2) mixing a gas obtained after gas products flowing out of the first fixed-bed reactor pass through a gas-liquid separator with HFP, and feeding the mixture into a second fixed-bed reactor, and conducting a contact reaction on the mixture in the fixed-bed reactor under the action of a catalyst; and 3) separating a C5 product and a C4 product from effluents from the second fixed-bed reactor. The present application begins with inexpensive raw materials, perfluorinated propylene and oxygen, and realizes co-production of two novel environmentally friendly insulating gases with an atom economy of 80-90%, and can significantly reduce production costs and reduce discharge of solid, liquid and gaseous waste during the production process.

IPC Classes  ?

• C07C 45/32 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by oxidation with molecular oxygen
• C07C 253/20 - Preparation of carboxylic acid nitriles by dehydratation of carboxylic acid amides
• C07C 49/167 - Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen containing only fluorine as halogen
• C07C 255/10 - Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms containing cyano groups and halogen atoms, or nitro or nitroso groups, bound to the same acyclic carbon skeleton