Page 39 - Chemical and process design handbook
P. 39

Speight_Part 1_H  11/7/01  3:03 PM  Page 1.25







                                          HYDRATION AND HYDROLYSIS                1.25

                    Ethylene                                               Ethyl alcohol
                                                        Gas purification



                                                         Sulfuric
                                                           acid

                             Absorber   Absorber     Absorber      Hydrolyzer  Refining and dehydration









                                                                          Sulfuric acid, to
                                                                           concentrators
                                                                  Water

                    FIGURE 1 Manufacture of ethyl alcohol from ethylene and sulfuric acid.




                                                                 Light ends
                          Ethylene                                           Ethyl alcohol
                                     Recycled ethylene
                    Water





                             Reactor      Separator    Scrubber      Distillation  Distillation









                                                                             Heavy ends


                    FIGURE 2  Manufacture of ethyl alcohol by direct hydration.
   34   35   36   37   38   39   40   41   42   43   44