Patent US5395997A successfully refreshed from Google Patents.
US5395997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of hydrofluorocarbons having 3 to 7 carbon atoms
Assignee: Honeywell International Inc
•
Filing: 1993-07-29
•
Granted: 1995-03-07
•
Expires: 2013-07-29
Abstract
Abstract The invention relates to a process for preparing hydrofluorocarbons of the formulas CF 3 (CH 2 CF 2 ) n F comprising reacting at least one reactant selected from CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl or CCl 2 [(CH 2 CF 2 )Cl] 2 , where n=1 to 3, with hydrogen fluoride at a temperature of from about 25° to about 200° C.
Inventors
- 👤 Michael Van Der Puy
- 👤 G. V. Bindu Madhavan
- 👤 Timothy R. Demmin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:11
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/278; C07C17/093; C07C17/20; C07C17/202; C07C17/206; C07C17/23
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
102 words
A process for preparing hydrofluorocarbons of the formula: CF.sub.3 (CH.sub.2 CF.sub.2).sub.n F I. wherein n=1 to 3 comprising reacting at least one reactant selected from CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl and CCl 2 [CH 2 CF 2 )Cl] 2 with hydrogen fluoride at a temperature of from about 25° to about 200° C. in the presence of at least one fluorination catalyst selected from the group consisting of halides of Sn, Ti, Ta and Sb; wherein the HF is present in at least stoichiometric amounts per mole of reactant.
Claim 2
Dependent Claim
102 words
A process for preparing hydrofluorocarbons of the formula: CF.sub.3 (CH.sub.2 CF.sub.2).sub.n F I. wherein n=1 to 3 comprising reacting at least one reactant selected from CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl and CCl 2 [CH 2 CF 2 )Cl] 2 with hydrogen fluoride at a temperature of from about 25° to about 200° C. in the presence of at least one fluorination catalyst selected from the group consisting of halides of Sn, Ti, Ta and Sb; wherein the HF is present in at least stoichiometric amounts per mole of reactant.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein said reactant is CCl 3 (CH 2 CCl 2 ) n Cl.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said reactant is CCl 3 (CH 2 CF 2 ) n Cl.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein said reactant is CCl 2 [(CH 2 CF 2 )Cl] 2 .
Claim 6
Dependent Claim
17 words
The process of claim 1 wherein said catalyst is a Sn, Ti, Ta or Sb (V) halide.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein the halide in said fluorination catalyst is selected from chlorine, fluorine or a combination thereof.
Claim 8
Dependent Claim
34 words
The process of claim 1 wherein the catalyst is selected from SnCl 4 , TiCl 4 , SbF 5 , SbCl 5 or SbF m Cl 5-m wherein m ranges from 1 to 4.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein said reaction is conducted at from about 25° to about 225° C.
Claim 10
Dependent Claim
18 words
The process of claim 1 wherein said reaction is conducted at from about 40° to about 175° C.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein said reaction is conducted at from about 50° to about 150° C.
Claim 12
Dependent Claim
48 words
The process of claim 1 wherein said process further comprises preparing CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl or CCl 2 [(CH 2 CF 2 )Cl] 2 by reacting CCl 4 with vinylidene chloride or vinylidene fluoride.
Claim 13
Dependent Claim
16 words
The process of claim 11 wherein said process is conducted in the presence of metal catalyst.
Claim 14
Dependent Claim
15 words
The process of claim 11 wherein catalyst is a metal salt of copper or iron.
Claim 15
Dependent Claim
20 words
The process of claim 12 wherein the catalyst is cuprous chloride, cupric chloride, or a mixture thereof or cuprous iodide.
Claim 16
Dependent Claim
22 words
The process of claim 12 wherein the amount of catalysts used is at least about 0.1 mmol per mole CCl 4 .
Claim 17
Dependent Claim
23 words
The process of claim 12 wherein said amount of catalyst ranges from about 0.1 to 50 mmol per mole of CCl 4 .
Claim 18
Dependent Claim
24 words
The process of claim 12 wherein said amount of catalyst ranges from about 1 to about 20 mmol per mole of CCl 4 .
Claim 19
Dependent Claim
16 words
The process of claim 12 wherein said process is conducted in the presence of a co-catalyst.
Claim 20
Dependent Claim
11 words
The process of claim 12 wherein the co-catalyst is an amine.
Claim 21
Dependent Claim
51 words
The process of claim 12 wherein said process of preparing CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl or CCl 2 [(CH 2 CF 2 ) m Cl] 2 is conducted at temperature of from about 40° to about 225° C.
Claim 22
Dependent Claim
24 words
The process of claim 5 wherein chlorine is added in an amount sufficient to substantially maintain the catalyst salt in a +5 oxidation state.
Claim 23
Dependent Claim
45 words
The process of claim 11 wherein said process of preparing CCl 3 (CH 2 CCl 2 ) n Cl, CCl 3 (CH 2 CF 2 ) n Cl or CCl 2 [(CH 2 CF 2 ) m Cl] 2 is conducted in an organic solvent.
Claim 24
Dependent Claim
20 words
The process of claim 22 wherein said organic solvent is selected from acetonitrile, dimethylsulfoxide, dimethylformamide tetrahydrofuran, isopropanol, and tertiary butanol.
Claim 25
Dependent Claim
17 words
The process of claim 19 wherein said catalyst is cuprous iodide and said amine co-catalyst is pyridine.
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) | 1998-03-06 | 1998-09-05 | 1999-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-06 | 2002-09-05 | 2003-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-06 | 2006-09-05 | 2007-03-07 | $7700.00 | Window Closed / Lapsed |