Distillation apparatus and method of use

A method comprising:

• selecting a quantity of used oil;
• selecting a distillation apparatus;
• placing the quantity of used oil within the distillation apparatus;
• removing an oxidizing light cut from the quantity of used oil in a first distillation process, thereby leaving a first remainder within the distillation apparatus;
• raising, after the removing, the temperature of the first remainder;
• and
• separating, after the raising, diesel fuel from the first remainder in a second distillation process, thereby leaving a second remainder within the distillation apparatus, the diesel fuel maintaining a substantially constant color independent of time.

A method comprising:

• applying a quantity of used oil to a molecular sieve to obtain a permeative product and a non-permeative product;
• placing one of the permeative product and the non-permeative product within a distillation apparatus;
• removing an oxidizing light cut from one of the permeative product and the non-permeative product in a first distillation process, thereby leaving a first remainder within the distillation apparatus;
• raising, after the removing, the temperature of the first remainder;
• and
• separating, after the raising, diesel fuel from the first remainder in a second distillation process, thereby leaving a second remainder within the distillation apparatus.

A method comprising:

• cleaning a quantity of used oil by mixing therewith a solution of water and sulfuric acid;
• separating, after the cleaning, the solution from the quantity of used oil;
• applying the quantity of used oil to a molecular sieve to obtain a permeative product and a non-permeative product;
• placing one of the permeative product and the non-permeative product within a distillation apparatus comprising at least one ultrasonic generator;
• removing an oxidizing light cut from one of the permeative product and the non-permeative product in a first distillation process, thereby leaving a first remainder within the distillation apparatus;
• raising, after the removing, the temperature of the first remainder;
• separating, after the raising, diesel fuel from the first remainder in a second distillation process, thereby leaving a second remainder within the distillation apparatus, the diesel fuel maintaining a substantially constant color independent of time;
• sparging a gas into at least one of the quantity of used oil and the first remainder;
• and
• passing the gas and at least a portion of at least one of the quantity of used oil and the first remainder proximate the at least one ultrasonic generator.