Apparatus for producing acetic acid and Method for operating an absorber Tower to produce acetic acid.

摘要

Claim 1: an apparatus to produce acetic acid which comprises (a) a Reactor for the carbonylation of methanol and its derivatives Reagents, the Reactor containing a catalyst selected Catalysts, Catalysts of Rhodium, Iridium, and mixtures thereof,And a promoter of methyl iodide in a mixture of acetic acid reaction; (b) to provide a system for power and Methanol to carbon monoxide or its derivatives Reagents to the reactor; (c) an instantaneous Vaporization System configured to receive a stream of Mix D And reaction and Separated into at least a First Stream RecirculationAnd (ii) a Raw Stream containing acetic acid process; (d) a First distillation column coupled to the instantaneous Vaporization System, the first distillation column to be adapted for Separating Low boiling components, including Methyl iodide of Corrie The process of generating a stream of crude and Purified process.The First distillation column Reactor and optionally and Vaporization System snapshot also operate to generate a Flow of Vented gas comprising volatile organic compounds including Methyl iodide; (e) a Tower of Absorbent adapted to receive the stream You Vented Gas and remove the Methyl iodide there with a Solvent CleanerThe Absorbing Tower is also coupled to first and second sources of solvent purification that are capable of providing first and second purification Solvent; and (f) a switching system to provide Alternating first and second the Solvent purification Tower The absorber of the first or the second source of solvent Solvent Source Debugger Debugger.Claim 1: a method to operate an Absorbing Tower in a unit of carbonylation to acetic acid for the class that includes a reactor and a column of Light Terminals comprising: (a) feeding the Vented gas of carbonylation Unit to the Absorbing Tower,The Vented gas which includes Methyl iodide and Optionally additional volatile components; (b) providing a First Solvent Tower Scrubber AbsorbentThe First Solvent Debugger which consists essentially of acetic acid; (c) the first contact with the Vented gas Scrubber which removes Solvent with Methyl iodide and Optionally additional volatile components of Gas and absorb Methyl iodide and optionally the component Additional Solvent is volatile in the first Scrubber; (d) feeding a return current of ABSorbent that includes a First Solvent Debugger and methyl iodide absorbed and The volatile components, additional to the absorbed light column Terminals and / or dehydration Column; (e) complete the supply of the first Solvent Tower Scrubber Absorbent; (f) Supply AR a Second Solvent Tower Scrubber AbsorbentThe Second Solvent Debugger comprising Methanol,Methyl acetate or mixtures thereof; (g) The Vented gas contact with the second Scrubber which removes Solvent with Methyl iodide and Optionally additional volatile Components and Gas Absorbing Methyl iodide and Optionally additional volatile Components In the second Solvent Debugger; and (g) a current feed back of the absorber that includesThe Second Solvent Debugger and methyl iodide absorbed and Optionally additional volatile components to the reactor.