For the production of drying oil shown as Project B.4 in Appendix B do the following:

1. Construct a process conditions matrix (PCM) for the process, and determine all conditions of special concern.

2. For each condition of special concern identified in Part (a), suggest at least one reason why such a condition was used.

3. For each condition of special concern identified in Part (a), suggest at least one process alternative to eliminate the condition.

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The process flow diagram is shown in Figure B.4.1. ACO is fed from a holding tank where it is mixed with recycled ACO. The ACO is heated to reaction temperature in H-501. The reaction does not require a catalyst, since it is initiated at high temperatures. The reactor, R-501, is simply a vessel with inert packing to promote radial mixing. The reaction is quenched in E-501. Any gum that has been formed is removed by filtration. There are two holding vessels, V-502 A/B. One of them is used to hold reaction products, while the other one feeds the filter (not shown). This allows a continuous flow of material into Stream 7. In T-501 the ACO is separated and recycled, and in T- 502, the DO is purified from the acetic acid. The contents of Streams 11 and 12 are cooled (exchangers not shown) and sent to storage.