Thermal coupling of a plant for preparing 1,2-dichloroethane to a plant for thermal desalination (of sea water)

A method for generation of 1,2-dichloroethane from ethylene and chlorine and for water desalination, comprising:

• reacting ethylene with chlorine to 1,2-dichloroethane in a first plant part;
• and
• performing a water desalination in a second plant part,
• wherein the heat produced in the reaction of ethylene with chlorine is utilized for heating of water in the desalination,
• wherein the water desalination is performed as multistage flash evaporation or as multieffect distillation,
• wherein water is utilized as a heat transfer medium for transfer of the heat from the first to the second plant part,
• wherein the water for cooling of the 1,2-dichloroethane is heated to not more than 95° C.

A method, comprising:

• using heat from generation of 1,2-dichloroethane from ethylene and chlorine for heating of water to be treated in a water desalination,
• wherein the heat is transferred from 1,2-dichloroethane to the water by means of a transfer apparatus,
• wherein the heat produced in the reaction of ethylene with chlorine is utilized for heating of a thermal process for water desalination via boosted multieffect distillation or flash-boosted multieffect distillation,
• wherein water is utilized as heat transfer medium for transfer of the heat from the 1,2-dichloroethane to the water,
• wherein the water for cooling of the 1,2-dichloroethane is heated to not more than 95° C.

A plant for production of 1,2-dichloroethane and for water desalination, comprising:

• a first plant part with a reactor for reaction of chlorine with ethylene to 1,2-dichloroethane,
• a second plant part for water desalination, and
• an apparatus for transfer of heat energy between the two plant parts,
• wherein the plant part for water desalination is designed as a boosted multieffect distillation or flash-boosted multieffect distillation and the plant is configured such that transfer of heat energy between the first and second plant part is possible via water as heat transfer medium, and the second plant part for water desalination is configured for operation with water as heat transfer medium at a temperature of not more than 95° C.