Page 96 - Analysis, Synthesis and Design of Chemical Processes, Third Edition
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In the second campaign, shown in Figure E2.6(e), methanol is sent to storage, and ethanol is taken from
storage to produce DEE and ethylene using the same equipment as was used to produce DME. For this
part of the campaign, the first column is used to remove the ethylene.
Figure E2.6(e) Structure of Process for Alternative 3—DEE Campaign in Example 2.6
For this option, there is significantly less equipment to buy. However, the design and optimization of the
process are more complicated because the equipment must be designed to perform two separate and quite
different functions.
2.5 Step 4—General Structure of the Separation System
As pointed out previously, the structure of the separation sequence is covered in detail in Chapter 12. In
