A professional who controls equipment that absorbs gases and liquids into water or other solvents to produce chemicals, such as hydrochloric acid or ammonium hydroxide. Respnsibilities include:

• Starts pumps, turns valves, and observes flowmeters to control concentration, flow, temperature, and quantity of coolant, gas, liquid, and absorbing liquor through cooling and absorption towers.
• Turns valves to regulate feed of solution produced and rate of steam to purge boilers and condensers to separate impurities from solution and obtain product of designated strength and specific gravity.
• Draws sample and tests specific quality and acidity, using hydrometer and pH meter, or submits sample to laboratory for analysis.
• Pumps solution between equipment and storage tanks or tank cars.
• Maintains log of instrument readings, test results, and shift production.
• May be designated according to solution produced as Ammonium-Hydroxide Operator; Aqua-Ammonia Operator; Hydrochloric-Acid Operator.