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7.2 Chemical Complexes  253

                                   Crude
                                   C4
                                                          Polybutadiene
                                          Butadiene
                            H2                   Butadiene
                                                          SB latex
                                   Py
                                   gas
                                          Benzene
                                                  Benzene
                                          extraction     EB / Styrene  Styrene  Poly styrene
                        Nafta
                                   C3
                        cracker
                                             Cumene
                                                           Cyclo hexane
                                            Poly propylene
                                                                 Pipeline
                                  C2               Ethylene glycols
                                                  Poly Ehtylene

                Fig. 7.1. An integrated hydrocarbon based chemical complex.


                7.2.3
                Chlorine-based Complexes

                These are another example, and are at the front end of inorganic chemistry. More-
                over, chlorinated methanes and other chlorinated hydrocarbons often also form a
                typical production chain.


                7.2.4
                Refinery Complexes

                These are the most well-known application of integrated complexes that produce all
                kinds of fuels from crude oil. Different types of upgrading facilities are integrated
                into the refinery complex to obtain the maximum value from the crude oil.
                  Next to the above-mentioned product chains are those of the pharmaceutical and
                food industries. All complexes have their own typical set of processes, with unique
                levels of integration.

                7.2.5
                Combinations Complexes

                There are also combinations of the above-mentioned complexes are also for example
                chlorine and hydrocarbons for the vinyl chloride monomer up and to PVC. Nitrogen
                and hydrocarbons complexes can form the base of aniline production, through the
                route of ammonia, nitric acid, nitrobenzene. The production of acrylo-nitrile from
                propylene and ammonia, ending in poly-acrylic nitriles, is another example of a
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