Process for converting a feed in a series of reactors

A process for converting a feed in a series of reactors, comprising:

• feeding a first hydrocarbon feed stream through tubes in a heat exchanger to provide a heat exchanged first hydrocarbon feed stream;
• charging the heat exchanged first hydrocarbon feed stream to a first reactor to provide a first product stream;
• feeding a second hydrocarbon feed stream through tubes in said heat exchanger to provide a heat exchanged second hydrocarbon feed stream;
• charging the heat exchanged second hydrocarbon feed stream to a second reactor to provide a second product stream;
• and
• feeding said second product stream to the shell of said heat exchanger to provide a heat exchanged a second product stream.

A process for converting a feed in a series of reactors, comprising:

• taking at least two hydrocarbon streams, a first hydrocarbon feed stream and a second hydrocarbon feed stream;
• heating said first hydrocarbon feed stream and said second hydrocarbon feed stream in a heat exchanger with a second product stream from a second reactor;
• and
• charging a heated first hydrocarbon feed stream into a first catalyst bed in a first reactor to produce a first product stream and a heated second hydrocarbon feed stream into a second catalyst bed in the second reactor to produce the second product stream.