US4323716A
Expired / Lapsed
US
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Process and catalyst for the production of dichloroethane
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1980-01-21
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Granted: 1982-04-06
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Expires: 2000-01-21
Abstract
Abstract An oxychlorination catalyst active in the production of dichloroethane from ethylene, hydrogen chloride and oxygen, consisting of copper chloride on a granular support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g and a surface area of from 250 to 400 m 2 /g with at least 90% of said volume attributable to pores with a radius of less than 40 A and at least 90% of said surface area attributable to pores with a radius of less than 30 A.
Inventors
- 👤 Roberto Canavesi
- 👤 Ferdinando Ligorati
- 👤 Giancarlo Aglietti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:27
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J27/00; B01J27/06; B01J27/08; B01J27/10; C; C07; C07C; C07C17/00; C07C17/093; C07C17/15; C07C17/152; C07C17/156; B01J35/61; B01J35/615; B01J35/63; B01J35/633; B01J35/64; B01J35/643; B01J35/66; B01J35/67
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
An oxychlorination catalyst, active in the production of dichloroethane, from ethylene, hydrogen chloride and oxygen, consisting of supported copper chloride obtained by contacting a granular support with cupric chloride dissolved in a solvent and evaporating said solvent, the said support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g and a surface area of from 250 to 400 m 2 /g with a least 90% of said volume attributable to pores with a radius of less than 40 A and with at least 90% of said surface area attributable to pores with a radius of less than 30 A.
Claim 2
Dependent Claim
110 words
An oxychlorination catalyst, active in the production of dichloroethane, from ethylene, hydrogen chloride and oxygen, consisting of supported copper chloride obtained by contacting a granular support with cupric chloride dissolved in a solvent and evaporating said solvent, the said support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g and a surface area of from 250 to 400 m 2 /g with a least 90% of said volume attributable to pores with a radius of less than 40 A and with at least 90% of said surface area attributable to pores with a radius of less than 30 A.
Claim 3
Dependent Claim
64 words
The oxychlorination catalyst of claim 1, wherein said volume of pores is of 0.4 ml/g and said surface area is of approximately 350 m 2 /g, at least 90% of said volume being attributable to pores with a radius of less than 30 A and at least 90% of said surface area being attributable to pores with a radius of less than 20 A.
Claim 4
Dependent Claim
24 words
The oxychlorination catalyst of claim 1, wherein said granular support is in the form of granules of from 20 to 100 microns in size.
Claim 5
Dependent Claim
21 words
The oxychlorination catalyst of claim 1, wherein the content in copper calculated as metal is from 2 to 8% by weight.
Claim 6
Dependent Claim
135 words
A process for the production of dichloroethane, which comprises contacting a gaseous flow comprising ethylene, hydrogen chloride and oxygen at a temperature of from 200° to 240° C. and at a pressure of from 3 to 5 atmospheres with a fluidized catalyst consisting of supported copper chloride obtained by contacting a granular support with cupric chloride dissolved in a solvent and evaporating said solvent, said support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g with at least 90% of said volume attributable to pores with a radius of less than 40 A and a surface area of from 250 to 400 m 2 /g with at least 90% of said surface area attributable to pores with a radius of less than 30 A.
Claim 7
Dependent Claim
135 words
A process for the production of dichloroethane, which comprises contacting a gaseous flow comprising ethylene, hydrogen chloride and oxygen at a temperature of from 200° to 240° C. and at a pressure of from 3 to 5 atmospheres with a fluidized catalyst consisting of supported copper chloride obtained by contacting a granular support with cupric chloride dissolved in a solvent and evaporating said solvent, said support consisting of alumina in the crystallographic form eta, having a total volume of pores of from 0.3 to 0.5 ml/g with at least 90% of said volume attributable to pores with a radius of less than 40 A and a surface area of from 250 to 400 m 2 /g with at least 90% of said surface area attributable to pores with a radius of less than 30 A.
Claim 8
Dependent Claim
48 words
The process of claim 5, wherein said gaseous flow comprises from 1.5 to 2.5 moles of hydrogen chloride and from 0.5 to 1.0 moles of oxygen for each mole of ethylene and the residence time of said gaseous flow under reaction conditions is from 20 to 30 seconds.
Claim 9
Dependent Claim
63 words
The process of claim 5, wherein said volume of pores is of 0.4 ml/g and said surface area is of approximately 350 m 2 /g, at least 90% of said volume being attributable to pores with a radius of less than 30 A and at least 90% of said surface area being attributable to pores with a radius of less than 20 A.
Claim 10
Dependent Claim
23 words
The process of claim 5, wherein said granular support is in the form of granules of from 20 to 100 microns in size.
Claim 11
Dependent Claim
20 words
The process of claim 5, wherein said catalyst contains from 2 to 8% by weight of copper calculated as metal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-05 | 1985-10-05 | 1986-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-05 | 1989-10-05 | 1990-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-05 | 1993-10-05 | 1994-04-06 | $7700.00 | Window Closed / Lapsed |