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Job Description:

  • 1) Controls agitator tank to wash benzol, benzene, toluene, and xylene with sulfuric acid and caustic soda to remove impurities: Turns valves and starts pumps to charge agitator vessel with specified amount of benzol or derivatives.

  • 2) Drains measured quantity of acid into vessel and starts agitator to mix contents for specified time.

  • 3) Stops agitator to allow acid and sludge to settle.

  • 4) Draws sample of washed product for laboratory colorimetry test to determine need for further washing.

  • 5) Opens valve, using wrench, to drain excess acid and sludge, adds caustic soda solution to neutralize remaining acid, and measures alkalinity, using standard titration test.

  • 6) Adds water, agitates mixture to wash out traces of caustic, and drains off water after contents have settled.

  • 7) Pumps washed benzol or derivatives into storage tank.

  • 8) Turns valves to admit steam to sludge kettle, solidifying sludge.

  • 9) Lifts kettle cover, using chain hoist, and removes sludge from kettle.

  • 10) May distill washed benzol in batch still.

  • 11) May remove impurities from crude ethylbenzene by adding lime and water and agitating mixture.




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End Of Job Description for: "BENZENE-WASHER OPERATOR"
DOT:   551.682-010

Job Number: 755