06531630 is referenced by 31 patents and cites 2 patents.

The converting of an existing methanol plant to make acetic acid is disclosed. The converted plant utilizes the steam reformer (

10

) to which (a) a hydrocarbon ,e.g., natural gas, or a lower alkanol, e.g., methanol, and (b) steam (water) are fed. Syngas is formed in the reformer (

10

). All or part of the syngas is processed to separate out carbon dioxide (

24

), carbon monoxide (

30

) and hydrogen (

32

), and the separated carbon dioxide (

24

) is fed either to the existing methanol synthesis loop (

12

) for methanol synthesis, or back into the feed to the reformer (

10

) to enhance carbon monoxide formation in the syngas (

18

). When a lower alkanol is fed to the reformer (

10

), the methanol synthesis loop (

12

) is shutdown and isolated from the rest of the plant. Any remaining syngas (

38

) not fed to the carbon dioxide separator (

22

) can be converted to methanol in the existing methanol synthesis loop (

12

) along with carbon dioxide (

24

) from the separator (

22

) and/or imported carbon dioxide (

25

), and hydrogen (

35

) from the separator (

28

). The separated carbon monoxide (

30

) is then reacted with the methanol (

36

) to produce acetic acid (

40

) or an acetic acid precursor by a conventional process. When the methanol synthesis loop (

12

) is shutdown, an imported source of methanol is used.

Title
Bimodal acetic acid manufacture
Application Number
9/751240
Publication Number
6531630 (B2)
Application Date
December 29, 2000
Publication Date
March 11, 2003
Inventor
Kenneth Ebenes Vidalin
750 World Trade Centre, 999 Canada Place, Vancouver, B.C.
US
Agent
Lundeen & Dickinson
US
Agent
Daniel N Lundeen
US
IPC
C07C 51/12
View Original Source