US4414160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making carboxylic acid halides
Assignee: Hoechst AG
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Filing: 1981-09-14
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Granted: 1983-11-08
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Expires: 2001-09-14
Abstract
Abstract The invention relates to the manufacture of carboxylic acid halides. To this end, an alkyl halide having from 1 to 6 carbon atoms or an aryl halide is reacted with carbon monoxide under practically anhydrous conditions at temperatures of 350 to 575 K. and under pressures of 1 to 300 bars in the presence of a catalyst system containing at least one of the noble metals selected from rhodium, palladium, iridium or their compounds, iodine and/or its compounds, methyl trialkyl phosphonium iodide and/or methyl triaryl phosphonium iodide, and optionally trialkyl phosphine oxide or triaryl phosphine oxide as well as an inert organic solvent. More specifically, the reaction mixture is admixed with 0.02 to 0.75 mol of hydrogen per mol of carbon monoxide.
Inventors
- 👤 Heinz Erpenbach
- 👤 Klaus Gehrmann
- 👤 Winfried Lork
- 👤 Peter Prinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:13
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
In a process for making carboxylic acid halides by reacting an alkyl halide having from 1 to 6 carbon atoms or an aryl halide with carbon monoxide under practically anhydrous conditions at temperatures of 350 to 575 K. and under pressures of 1 to 300 bars in the presence of a catalyst system containing at least one of the noble metals selected from rhodium, palladium, iridium or their compounds, iodine and/or its compounds, methyl trialkyl phosphonium iodide and/or methyl triaryl phosphonium iodide, the improvement which comprises admixing the reaction mixture with 0.02 to 0.75 mol of hydrogen per mol of carbon monoxide.
Claim 2
Dependent Claim
102 words
In a process for making carboxylic acid halides by reacting an alkyl halide having from 1 to 6 carbon atoms or an aryl halide with carbon monoxide under practically anhydrous conditions at temperatures of 350 to 575 K. and under pressures of 1 to 300 bars in the presence of a catalyst system containing at least one of the noble metals selected from rhodium, palladium, iridium or their compounds, iodine and/or its compounds, methyl trialkyl phosphonium iodide and/or methyl triaryl phosphonium iodide, the improvement which comprises admixing the reaction mixture with 0.02 to 0.75 mol of hydrogen per mol of carbon monoxide.
Claim 3
Dependent Claim
55 words
A process as claimed in claim 1, wherein the reaction is effected in the presence of a catalyst system containing one or more compounds of the base metals selected from Ce, Ti, Zr, Hf, Ge, Sn, Pb, V, Nb, Ta, As, Sb, Bi, Cr, Mo, W, Mn, Re, Fe, Co and Ni as additional ingredients.
Claim 4
Dependent Claim
23 words
A process as claimed in claim 1 or 2, wherein the process is carried out in the presence of an inert organic solvent.
Claim 5
Dependent Claim
29 words
A process as claimed in claim 1 or 2, wherein the catalyst system contains a trialkyl phosphine oxide or triaryl phosphine oxide as well as an inert organic solvent.
Claim 6
Dependent Claim
52 words
A process as claimed in claim 1 or 2, wherein the catalyst system optionally contains trialkyl phosphine oxide or triaryl phosphine oxide as well as an inert organic solvent, and the catalyst system comprised of noble metal(-compound)/base metal compound/iodine(-compound)/tertiary phosphine oxide/quaternary phosphonium iodide/organic solvent is used in a molar ratio of 1:(0-8):(1-100):(0-50):(1-100):(0-500).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |