Sodium cyanide method?

Sodium cyanide (NaCN) is known to be produced by so-called wet process or neutralization of hydrogen cyanide (HCN) and sodium hydroxide (NaOH). HCN is added in the form of gas or liquid, while NaOH is added in the form of aqueous solution, thus forming NaCN aqueous solution. Solid sodium cyanide crystals are formed during evaporation of sodium cyanide aqueous solution. These crystals can be separated and dried to obtain anhydrous sodium cyanide products, which are usually compressed into briquettes that are easy to transport and use.

In the past, manufacturers usually used basically pure anhydrous HCN to react with basically pure NaOH, which was usually added to the reactor in the form of 50% solution. American patent. 2708 15 1 (McMinn Jr.) and American patent. 2726 139(Oliver) teaches a method of using substantially pure HCN.

Extended data:

Sodium cyanide is easily deliquescent and has a faint bitter almond flavor. Highly toxic, skin wound contact, inhalation, swallowing a small amount can be poisoned to death. Melting point 563.7℃, boiling point 1496℃.

Soluble in water, easily hydrolyzed to produce hydrogen cyanide, and its aqueous solution is strongly alkaline. It is an important basic chemical raw material, which is used as complexing agent and masking agent in basic chemical synthesis, electroplating, metallurgy and organic synthesis medicine, pesticide and metal treatment.