Hydrogen cyanide synthesis process
AssigneeRoehm GmbH
InventorsThomas Schaefer, Hermann Siegert
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Abstract
A process for the production of hydrogen cyanide is provided, wherein hydrogen cyanide is synthesized by reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy; wherein the reactants are present in the following molar ratios 1 [ O 2 ] [ O 2 + N 2 ] = 0.25 to 1.0 ; [ CH 4 ] [ NH 3 ] = 0.95 to 1.05 ; and where a molar ratio of ammonia to the sum of oxygen and nitrogen obeys the following relationship: Y=m·X−a, wherein 2 Y = [ NH 3 ] [ O 2 + N 2 ] X = [ O 2 ] [ O 2 + N 2 ] m=1.25 to 1.40; and a=0.05 to 0.14.
Claims14
A process for synthesis of hydrogen cyanide, comprising:
- reacting methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst comprising platinum or a platinum alloy;
- wherein oxygen and nitrogen are present in a molar ratio which satisfies the relationship
- 8 [ O 2 ] [ O 2 + N 2 ] = 0.25 to 1.0 ;
- wherein methane and ammonia are present in a molar ratio of
- 9 [ CH 4 ] [ NH 3 ] = 0.95 to 1.05 ;
- wherein a molar ratio of ammonia to the sum of oxygen and nitrogen obeys the following relationship:
- Y=m·X−a,
- wherein
- 10 Y = [ NH 3 ] [ O 2 + N 2 ] X = [ O 2 ] [ O 2 + N 2 ]
- m=1.25 to 1.40;
- and
- a=0.05 to 0.14.
A process for synthesis of hydrogen cyanide by the Andrussow method, comprising:
- reacting a mixture of methane or methane-containing natural gas, ammonia and oxygen-enriched air or oxygen in the presence of a catalyst at an elevated temperature;
- wherein a ratio
- 13 [ O 2 ] [ O 2 + N 2 ] > 0.4 to 1.0 ( vol / vol ) ;
- and
- wherein said reacting is performed in a conventional Andrussow reactor.
Dependencies are inferred from the claim text.