Process for the production of ethanol and/or acetaldehyde by...

Details Process for the production of ethanol and/or acetaldehyde by... Process for the production of ethanol and/or acetaldehyde by...

C - Chemistry, Metallurgy

07

C

260/639, 260/572

C07C 31/08 (2006.01) C07C 29/32 (2006.01) C07C 45/49 (2006.01) C07C 47/06 (2006.01)

Patent

CA 1133513

ABSTRACT OF THE DISCLOSURE Ethanol or acetaldehyde or both are produced by reacting methanol and synthesis gas at elevated temperature and pressure in the presence of a catalyst consisting of (a) cobalt, (b) an iodide or a bromide and (c) a polydentate ligand having the formula: (R1)(R2)X-[C[R5)(R6)]n-Y(R3)(R4) (II) in which X and Y are independently nitrogen, phosphorus, arsenic, antimony or bismuth; n is an integer; (R1), (R2), (R3) and (R4) are independently hydrocarbyl groups containing from 1 to 20 carbon atoms. Examples of polydentate ligands which are effective in the production of ethanol are those having the formula (II) in which (R1), (R2), (R3) and (R4) are C6H5-, X and Y are phosphorus and n has the value 4 to 6. Ethanol is the predominant product when the donor atoms are exclusively nitrogen or phosphorus, particularly phosphorus, and acetaldehyde is the major product when the donor atoms are exclusively arsenic, antimony or bismuth.

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