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A process for reducing the chloride concentration in a system which contains an ethylenically unsaturated chlorinated hydrocarbon, water and HCl which includes providing certain nitrogen-containing compounds in the system and contacting the system with a molecular sieve. The process surprisingly is

A process for reducing the chloride concentration in a system which contains an ethylenically unsaturated chlorinated hydrocarbon, water and HCl which includes providing certain nitrogen-containing compounds in the system and contacting the system with a molecular sieve. The process surprisingly is capable of regenerating the nitrogen-containing compounds employed.

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A process for reducing the concentration of chloride in a system consisting essentially of ethylenically unsaturated chlorinated hydrocarbon which is liquid at the conditions of the process, water and HCl which comprises providing in the system with said ethylenically unsaturated chlorinated hydroca

A process for reducing the concentration of chloride in a system consisting essentially of ethylenically unsaturated chlorinated hydrocarbon which is liquid at the conditions of the process, water and HCl which comprises providing in the system with said ethylenically unsaturated chlorinated hydrocarbon a nitrogen containing compound having at least one unshared pair of electrons capable of forming a dative covalent bond and contacting said system, subsequent to providing in the system said nitrogen compound, with a molecular sieve having an effective pore size of about 3 to about 10 A to thereby reduce the concentration of chloride in said system after contact with said molecular sieve to less than 5 ppm and wherein said concentration of water after contact with said molecular sieve is less than 50 ppm and wherein said nitrogen containing compound forms a complex with HCl, said complex is broken down into HCl and said nitrogen containing compound upon contact with said molecular sieve thereby regenerating said nitrogen containing compound, wherein some nitrogen containing compound is adsorbed on the molecular sieve and is then replaced on said molecular sieve by water whereby said nitrogen containing compound is released back into said system.