Method for removing nitriles from hydrogen cyanide
Process for making purified hydrogen cyanide. The process includes feeding a reaction product including HCN, water, and organonitriles to a separation vessel; taking a liquid slip stream of HCN, water and organonitriles from the separation vessel; and feeding the liquid slipstream into a sidestream stripper to purge nitriles from the HCN reaction product.
1. A method for making purified HCN comprising the steps of:
feeding a reaction product comprising water, HCN, and organonitriles to a separation vessel; taking a liquid slipstream of the reaction product from the separation vessel and feeding the liquid slipstream into a sidestream stripper; providing sufficient heat to the sidestream stripper to effect the separation of the HCN from the organonitriles and water; purging the organonitriles from the sidestream stripper; returning the HCN to at least one of the separation vessel and purification equipment; and recovering the purified HCN.
2. The method of claim 1 , wherein the sidestream stripper comprises a packed bed.
3. The method of claim 1 , wherein the sidestream stripper comprises trays.
4. The method of claim 1 , wherein the heat is supplied via direct injection of steam into the sidestream stripper.
5. The method of claim 1 , wherein the heat is supplied via indirect heating with steam.
6. The method of claim 1 , wherein the reaction product is produced by reacting methane, a source of oxygen, and ammonia.
7. The method of claim 1 , wherein the reaction product is produced by reacting propylene, a source of oxygen, and ammonia.
8. The method of claim 1 , wherein the reaction product is produced by reacting propane, a source of oxygen, and ammonia.
9. The method of claim 1 , wherein sulfur dioxide is added to the separation vessel to minimize the formation of undesirable polymer products.
10. The method of claim 1 , wherein at least one of sulfuric acid, phosphoric acid, acetic acid, and glycolic acid is added to the separation vessel to minimize the formation of undesirable polymer products.