Catalytical synthesis of internal fluorobutenes and internal fluoropentenes

摘要

A vapor phase process is disclosed for making internal fluorobutenes. The process involves contacting a halobutane starting material selected from the group consisting of CF2HCHClCH2CCl2H, CF2HCHClCH2CCl3, CF3CHClCH2CCl2H, CF3CHClCH2CCl3, CF3CHClCHClCCl2H, CF3CHClCHClCCl3, CF3CCl2CH2CCl2H, CF3CCl2CH2CCl3, CF3CCl2CHClCCl2H, CF3CCl2CHClCCl3, CF3CClFCHClCCl2H, CF3CClFCHClCCl3, CF3CClFCH2CCl2H, CF3CClFCH2CCl3, CF3CClFCHFCCl2H, CF3CClFCHFCCl3, CF3CClHCHFCCl2H and CF3CClHCHFCCl3, with HF in a reaction zone in the presence of a chromium oxyfluoride catalyst to produce a product mixture comprising an internal fluorobutene. Another vapor phase process is disclosed for making internal fluoropentenes. The process involves contacting a halopentane starting material selected from the group consisting of CF2HCHXCH2CX2CX3, CF3CHXCH2CX2CX3, CF3CHXCHXCX2CX3, CF3CX2CH2CX2CX3, CF3CX2CHXCX2CX3 and CF3CHXCHFCX2CX3, with HF in a reaction zone in the presence of a chromium oxyfluoride catalyst to produce a product mixture comprising an internal fluoropentene, wherein each X is independently selected from the group consisting of F, Cl and Br, provided that not all X are fluorines.

主权项

1. A vapor phase process for making internal fluorobutenes comprising contacting a halobutane starting material selected from the group consisting of CF2HCHClCH2CCl2H, CF2HCHClCH2CCl3, CF3CHClCH2CCl2H, CF3CHClCH2CCl3, CF3CHClCHClCCl2H, CF3CHClCHClCCl3, CF3CCl2CH2CCl2H, CF3CCl2CH2CCl3, CF3CCl2CHClCCl2H, CF3CCl2CHClCCl3, CF3CClFCHClCCl2H, CF3CClFCHClCCl3, CF3CClFCH2CCl2H, CF3CClFCHFCCl2H, CF3CClFCHFCCl3, CF3CClHCHFCCl2H and CF3CClHCHFCCl3, with HF in a reaction zone in the presence of a catalyst consisting of chromium oxyfluoride to produce a product mixture comprising at least one fully fluorinated internal fluorobutene, wherein the at least one internal fluorobutene is present in the product mixture at an amount of greater than 15 mole percent.