JP2004534770A5

JP2004534770A5 -

Info

Publication number: JP2004534770A5
Application number: JP2002591427A
Authority: JP
Filing date: 2002-05-08
Publication date: 2005-12-22

Claims

A process for producing vinyl chloride comprising (a) converting a reactant comprising ethane, ethylene or a mixture thereof to convert substantially all of the C2 hydrocarbon feed and comprising vinyl chloride and hydrogen chloride. Mixing the oxygen and chlorine sources in a reactor containing a suitable catalyst under fuel lean process conditions sufficient to generate a product stream; and (b) removing unreacted hydrogen chloride ( recycling to return for use in a).

The method of claim 1, wherein the oxygen is supplied as air.

The method of claim 2, wherein the oxygen is present at more than 3 times the volume concentration of C2 hydrocarbons in the feed.

More than about 97 mole percent of the C2 hydrocarbons in the feed is converted so that essentially no recoverable C2 hydrocarbons are present and the C2 hydrocarbons need to be recycled back to step (a) 4. The method of claim 3, wherein there is no.

One condition is that the catalyst is substantially free of iron and copper, and if cerium is present, the catalyst further includes at least one rare earth element in addition to cerium. The method of claim 1, comprising the rare earth material.

6. The method of claim 5, wherein the rare earth material component is selected from lanthanum, neodymium, praseodymium and mixtures thereof.

The method of claim 1, wherein the chlorine source is a gas and includes at least one of hydrogen chloride, chlorine, chlorinated hydrocarbons containing unstable chlorine, and mixtures thereof.

Cis / trans-1,2-dichloroethylene present in the product stream to produce a hydrogenated to ethylene dichloride (1,2-dichloroethane) by hydrogen, the method described in 請 Motomeko 1.

9. The process of claim 8, wherein the ethylene dichloride is optionally recycled at least in part to the reactor of step (a) .

A method of manufacturing a vinyl chloride, (a) ethane, the reaction product containing an acid Motogen and chlorine source, under conditions sufficient to produce a product stream comprising vinyl chloride and hydrogen chloride, a suitable catalyst And (b) reacting the hydrogen chloride with a catalyst in a second reactor to provide a second reactor effluent essentially devoid of hydrogen chloride. If, by recycling the (c) the second reactor effluent, the method comprising the steps of reacting the catalyst the ethane, together with previous SL oxygen source and the chlorine source in the combined step (a).

The method of claim 10, wherein the reactant further comprises ethylene .

12. The method of claim 11, wherein the second reactor effluent is recycled and reacted with a catalyst together with the ethane, the ethylene, the oxygen source and the chlorine source in the mixing step (a) .

The condition is that the catalyst of step (a) is substantially free of iron and copper and, if cerium is present, that the catalyst further comprises at least one rare earth element in addition to cerium. as, including one or more rare earth materials, the method according to any one of claims 10 to 12.

Rare earth material component is lanthanum, neodymium, is selected from praseodymium, and mixtures thereof The method of claim 1 3.

The method according to any one of claims 10 to 12, wherein the chlorine source is a gas and includes at least one of hydrogen chloride, chlorine, chlorinated hydrocarbons containing unstable chlorine, and mixtures thereof.

13. A process according to any of claims 10 to 12, wherein the hydrogen chloride is catalytically reacted in step (b) by a conventional oxychlorination process to produce ethyl chloride and / or ethylene dichloride.

13. A process according to any of claims 10 to 12, wherein the hydrogen chloride is reacted in step (b) by an aqueous liquid phase oxychlorination process to produce ethyl chloride and / or ethylene dichloride.

The method according to claim 16 or 17 , wherein the ethyl chloride and / or ethylene dichloride is at least partially recycled to the oxydehydrogenation / chlorination step (a).

Cis / trans-1,2-dichloroethylene present in said product stream from step (a), to produce a hydrogenated to ethylene dichloride (1,2-dichloroethane) with hydrogen, according to claim 10 to 12 The method in any one of.

20. The process of claim 19, wherein the ethylene dichloride is optionally recycled at least partially to the reactor of step (a) .

The method according to claim 10 , wherein the oxygen is supplied as air.

The oxygen of the feed in the presence more than 3 times the volume concentration of C2 hydrocarbons in the feed (eth down) The method of claim 21.

23. The method of claim 22, wherein the C2 hydrocarbon also includes ethylene .

More than about 95 mol% of the C2 hydrocarbon feed is converted in step (a) so that essentially no recoverable C2 hydrocarbon is present in the product stream of step (a) and C2 The method of claim 21 , wherein there is no need for hydrocarbon recycling.

A method for producing vinyl chloride, comprising:
Ethane, ethylene or mixtures thereof (wherein both ethane and ethylene are present, the ethane / ethylene molar ratio is 0.02 / 1 to 50/1) is reduced to about C2 hydrocarbon feed. By catalytically reacting with an oxygen source and at least one chlorine source of hydrogen chloride, chlorine or saturated chlorohydrocarbon under sufficient fuel lean process conditions to convert more than 95 mol%, Generating a first reactor effluent stream;
Cooling and condensing the first reactor effluent stream to provide a raw product stream having a first portion of the hydrogen chloride and a raw cooled hydrogen chloride stream having a second portion of the hydrogen chloride. And the process of giving,
Separating the raw product stream into a vinyl chloride monomer product stream and a lightweight stream having the first portion of the hydrogen chloride;
Recovering the second portion of the hydrogen chloride from the raw cooled hydrogen chloride stream, and in the reactor in which ethane, ethylene or a mixture thereof is combined with the oxygen source and the chlorine source, Recycling the second portion of hydrogen chloride;
Including methods.

A method for producing vinyl chloride, comprising:
Ethane, acid Motogen, and hydrogen chloride, chlorine, or by reacting the catalyst with at least one chlorine source of saturated chlorohydrocarbon, the step of generating a first reactor effluent stream,
Cooling and condensing the first reactor effluent stream to provide a raw product stream having a first portion of the hydrogen chloride and a raw cooled hydrogen chloride having a second portion of the hydrogen chloride. Giving the stream,
Separating the raw product stream into a vinyl chloride monomer product stream and a lightweight stream having the first portion of the hydrogen chloride;
Reacting essentially all of the first portion of hydrogen chloride in the lightweight stream with a catalyst to provide a second reactor effluent essentially devoid of hydrogen chloride; and the second reactor effluent. and recycle as, reacting said ethane in the development step, the catalyst together with the previous SL oxygen source and said chlorine source,
Including methods.

The first reactor effluent stream is generated by catalytically reacting ethane, ethylene, an oxygen source and at least one chlorine source of hydrogen chloride, chlorine or saturated chlorohydrocarbon, and the ethane 27. The method of claim 26, wherein the molar ratio of / ethylene is 0.02 / 1 to 50/1 .

The second reactor effluent was recycled, the ethane in the generation step, wherein the ethylene method of claim 27 is reacted catalytically with the oxygen source and the chlorine source.