Question

Arrange the proper sequence of oil processing
A. Refining
B. Pressing
C. Solvent Extraction
D. Rendering

• A. D, B, C, A
• B. A, C, B, D
• C. D, C, B, A
• D. C, B, D, A

Hint:

Oil processing follows a simple logic: First, get the crude oil out (Extraction). Then, clean it up (Refining). Extraction can be done by melting (Rendering), squeezing (Pressing), or washing with a solvent (Solvent Extraction).

Answer 1

The Correct Option is A

Step 1: Define the different oil processing steps.

Extraction: This is the first stage of getting oil out of the source material. The methods are:

D. Rendering: For animal fats (like lard or tallow), this involves melting the fat to separate it from other tissues.
B. Pressing (Expelling): For oilseeds (like sunflower or canola), this involves mechanically squeezing the oil out.
C. Solvent Extraction: This uses a solvent (like hexane) to wash the oil out of the source material. It's often used on the "press cake" left after pressing to extract the remaining oil. \end{itemize}
A. Refining: This is the final stage of purifying the crude oil obtained from extraction. It involves steps like degumming, neutralizing, bleaching, and deodorizing to remove impurities and undesirable compounds. \end{itemize}
Step 2: Construct a logical sequence. The process must start with extraction and end with refining. A comprehensive sequence that includes animal and plant sources would involve multiple extraction steps followed by a final purification step. Rendering (D) is a standalone extraction method. For seeds, pressing (B) is often followed by solvent extraction (C) for maximum yield. All crude oils then proceed to refining (A). Therefore, a logical sequence combining these possibilities is D, B, C, A, representing various extraction methods followed by the universal refining step.