Process for producing pyridazinone compound and production intermediates thereof
US-2015376138-A1 · Dec 31, 2015 · US
Gas phase production of alkyl alkanoate
US9938226B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9938226-B2 |
| Application number | US-201415022639-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 11, 2014 |
| Priority date | Sep 30, 2013 |
| Publication date | Apr 10, 2018 |
| Grant date | Apr 10, 2018 |
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Abstract
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Alkyl alkanoates, e.g., methyl propionate, are made by a gas phase process comprising the step of contacting under carbonylation conditions an alkene (e.g., ethylene), carbon monoxide, an alkanol (e.g., methanol), and a solid sulfide-based metal catalyst (e.g., iron sulfide). The alkyl alkanoate can be converted in a second step to an alkyl ester of an aliphatic carboxylic acid, e.g., methyl methacrylate, through condensation with an aldehyde, e.g., formaldehyde.
First claim
Opening claim text (preview).
What is claimed is: 1. A gas phase process comprising the step of contacting under carbonylation conditions an alkene gas, carbon monoxide gas, an alkanol gas and a solid sulfide-based metal catalyst selected from the group consisting of iron sulfide, cobalt sulfide, potassium rhodium sulfide, nickel sulfide and combinations thereof to produce an alkyl alkanoate. 2. The process of claim 1 in which the alkene gas is of the formula C n H 2n in which n is from 2 to 12. 3. The process of claim 1 in which the carbonylation conditions are halogen-free. 4. The process of claim 1 in which the alkene gas is ethylene gas. 5. The process of claim 1 in which the alkanol comprises 1-30 carbon atoms. 6. The process of claim 1 in which the alkanol is methanol. 7. The process of claim 1 in which the carbonylation conditions include a temperature from 200° C. to 400° C. and a pressure from 0.1 MPa to 10 MPa. 8. The process of claim 1 conducted in a trickle-bed reactor. 9. A gas phase process comprising the step of contacting under carbonylation conditions ethylene gas, carbon monoxide gas, methanol gas and a solid sulfide-based metal catalyst selected from the group consisting of iron sulfide, cobalt sulfide, potassium rhodium sulfide, nickel sulfide and combinations thereof to produce methyl propionate. 10. The process of claim 9 comprising the further step of contacting under condensation conditions the methyl propionate with formaldehyde to produce an methyl methacrylate. 11. The process of claim 1 conducted in the absence of hydrogen.
Assignees
Inventors
Classifications
- C07C67/343Primary
by increase in the number of carbon atoms · CPC title
Platinum group metals · CPC title
Sulfides · CPC title
Use of additives, e.g. for stabilisation · CPC title
with iron group metals or platinum group metals · CPC title
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- What does patent US9938226B2 cover?
- Alkyl alkanoates, e.g., methyl propionate, are made by a gas phase process comprising the step of contacting under carbonylation conditions an alkene (e.g., ethylene), carbon monoxide, an alkanol (e.g., methanol), and a solid sulfide-based metal catalyst (e.g., iron sulfide). The alkyl alkanoate can be converted in a second step to an alkyl ester of an aliphatic carboxylic acid, e.g., methyl me…
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C07C67/343. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 10 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).