A professional who tends tank in which catalytic material is impregnated with liquid chemicals for use in manufacturing butadiene. Respnsibilities include:

• Weighs specified quantity of catalyst and dumps it into tank containing measured amounts of liquid chemicals.
• Turns steam valve to heat mixture in tank until boiling occurs, impregnating catalytic material.
• Determines specific gravity of mixture, using hydrometer, and adds specified types and quantities of reagents to attain prescribed specific gravity.