93 results about "Ethylene Dichloride" patented technology

An improved process for the manufacture of ethylene oxide through the epoxidation of ethylene using a catalyst comprising silver and at least one efficiency-enhancing salt of a member of a redox-half reaction pair. Added to the epoxidation reaction is a two-component gas-phase promoter system comprising a chlorine-containing component (for example ethyl chloride, methyl chloride, vinyl chloride and ethylene dichloride), and a nitrogen-containing component of nitric oxide and other compounds capable of generating under reaction conditions at least one gaseous efficiency-enhancing member of a redox-half reaction pair comprising NO, NO2, N2O3 or N2O4. The amount of each component of said gaseous promoter is adjusted to maintain the ration of N* to Z* less than or equal to 1 wherein, N* is the nitric oxide equivalent in ppmv, ranging from 1 to 20 ppmv and Z*=ethyl chloride equivalent (ppmv)*100 percent / ethane equivalent (mol percent)*100 ranging from 5 to 40 ppmv.

A process for the preparation of perfluoroalkyl sulfenyl chloride; said process comprising i) reacting a compound of formula (I) wherein R represents an aromatic group with or without a substituent; and R' represents a halogen, with at least one fluoride compound and thiophosgene in a solvent to obtain a reaction mass; ii) pulverizing the reaction mass with the help of beads to obtain a mixture containing trifluoromethyl thiomethyl benzene derivative; iii) isolating the trifluoromethyl thiomethyl benzene derivative from the mixture; iv) distilling the trifluoromethyl thiomethyl benzene derivative to obtain a purified trifluoromethyl thiomethyl benzene derivative; v) dissolving the purified trifluoromethyl thiomethyl benzene derivative in a solvent selected from the group consisting of dichloromethane, toluene, benzene, ethylene dichloride, mono chloro benzene, carbon tctra chloride, ortho dichloro benzene and tri chloro benzene; and vi) cleaving the trifluoromethyl thiomethyl benzene derivative by selective chlorinolysis by passing chlorine gas at a temperature in the range of about -10 to about 30 DEG C to obtain perfluoroalkyl sulfenyl chloride.