| Patent Number |
Title Of Patent |
Date Issued |
| 4839153 |
Process for purification of HCl from pyrolysis of EDC |
June 13, 1989 |
| In a process for the purification of hydrogen chloride from the pyrolysis of 1,2-dichloroethane, optionally after a preceding step of acetylene removal by selective hydrogenation under specific conditions followed by rectification of the resulting mixture to obtain hydrogen chloride |
| 4822932 |
Heat recovery in production of vinyl chloride by pyrolysis of dichloroethane |
April 18, 1989 |
| In a method of treating the reaction product of pyrolysis of 1,2-dichloroethane to form vinyl chloride and hydrogen chloride with multiple stage cooling and distillation separation of the reaction product and recycle of unreacted 1,2-dichloroethane to the pyrolysis step, the improvem |
| 4788357 |
Vinyl chloride production |
November 29, 1988 |
| An improved method of producing vinyl chloride by pyrolysis of purified 1,2-dichloroethane at temperatures from 480.degree. C. to 540.degree. C. at a pressure of 10 to 36 bar absolute with partial utilization of the heat content of the flue gases from the pyrolysis furnace firing to |
| 4746759 |
Process for thermal cracking of 1,2-dichloroethane to form vinyl chloride |
May 24, 1988 |
| An improved process for the preparation of vinyl chloride from 1,2-dichloroethane (EDC) wherein 0.10 to 0.15 % by weight of carbon tetrachloride based on EDC, is used as a cracking promoter and the CHCl.sub.3 content is limited to less than 200 ppm. Before being fed to the cracking z |
| 4606742 |
Novel heat recovery process |
August 19, 1986 |
| In a method of recovering heat from flue gas resulting from the combustion of chlorinated organic compounds at 900.degree. to 1300.degree. C. at a pressure of 0.9 to 1.5 bar absolute whereby the flue gas is cooled with the recovery of heat and hydrogen chloride is processed, the improvem |
| 4584123 |
Process for upgrading hydrogen chloride containing chlorine, iron-III-chloride, ethylene and/or |
April 22, 1986 |
| A process of upgrading hydrogen chloride which contains chlorine, iron-III-chloride, acetylene and/or ethylene, for use in an oxichlorination process, wherein water in a gaseous state is added to the hydrogen chloride at temperatures between 120.degree. and 180.degree. C. within a ti |
| 4540837 |
Process for the work-up of residues of chlorination |
September 10, 1985 |
| A process for the work-up of chlorination residues by dissolving the same at temperatures between 100.degree. and 180.degree. C. in chlorine- and oxygen-containing hydrocarbons having a ratio by weight of hydrogen to chlorine of 0.028-0.06:1, a ratio by weight of oxygen:carbon of 0.0 |
| 4528174 |
Method for preparing hydrogen chloride for the ethyleneoxichlorination process |
July 9, 1985 |
| A method for preparing hydrogen chloride resulting from chlorination reactions for use in the ethyleneoxichlorination process by reacting the chlorine contained in the hydrogen chloride with ethylene in the gaseous phase in the presence of carrier catalysts based on an iron-free tran |
| 4409396 |
Process for the manufacture of unsaturated carboxylic acid esters |
October 11, 1983 |
| The invention relates to a process for the manufacture of unsaturated carboxylic acid esters by the reaction of olefins or cyclo-olefins with oxygen and carboxylic acids in the gaseous phase, in the presence of a catalyst which contains elements of the subsidiary group VIII of the pe |
| 4388278 |
Purification by hydrogenation of hydrogen chloride containing acetylene obtained by the thermal |
June 14, 1983 |
| The invention is a process for the purification of hydrogen chloride formed during the thermal cracking of 1,2-dichloroethane, by hydrogenating the acetylene impurities with excess hydrogen, at pressures of from 8 to 20 bar absolute and at temperatures of from 120.degree. to 180.degree. |
| 4326852 |
Method for increasing the bulk weight of silicon dioxide |
April 27, 1982 |
| A method for increasing the bulk weight of silicon dioxide with a surface of at least 50m.sup.2 /g by means of sub-atmospheric pressure applied at a filter face, wherein the silicon dioxide is moved by means of a conveyor screw, whose longitudinal axis is arranged parallel with respect t |
