Method for producing (meth)acrylic acid
US-9527792-B2 · Dec 27, 2016 · US
Process for preparing modified V—Ti—P catalysts for synthesis of 2,3-unsaturated carboxylic acids
US10065180B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10065180-B2 |
| Application number | US-201715829245-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 1, 2017 |
| Priority date | Sep 16, 2011 |
| Publication date | Sep 4, 2018 |
| Grant date | Sep 4, 2018 |
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Abstract
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The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus modified with alkali metal. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed.
First claim
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We claim: 1. A process for preparing a 2,3-unsaturated carboxylic acid, comprising: contacting a formaldehyde source with a carboxylic acid in the presence of a condensation catalyst under vapor-phase condensation conditions to obtain the 2,3-unsaturated carboxylic acid, wherein the condensation catalyst comprises a mixed oxide of vanadium (V), titanium (Ti), phosphorus (P), and alkali metal (M), and wherein the titanium component is derived from an organo-titanium compound, wherein the organo-titanium compound is titanium(IV) bis(ammonium lactate)dihydroxide. 2. The process according to claim 1 , wherein the formaldehyde source is formaldehyde, 1,3,5-trioxane, dimethoxymethane, or diacetoxymethane and the carboxylic acid is acetic acid or propionic acid. 3. The process according to claim 1 , wherein the formaldehyde source is an aqueous solution of formaldehyde, 1,3,5-trioxane, dimethoxymethane, or diacetoxymethane and the carboxylic acid is acetic acid or propionic acid. 4. The process according to claim 3 , wherein the aqueous solution comprises from 30 to 65 weight percent of formaldehyde. 5. The process according to claim 1 , wherein the alkali metal is selected from at least one of lithium, sodium, potassium, rubidium, and cesium. 6. The process according to claim 1 , wherein the alkali metal comprises potassium. 7. The process according to claim 1 , wherein the catalyst composition further comprises a pre-shaped support.
Assignees
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Classifications
Vanadium · CPC title
Titanium · CPC title
Constitutive chemical elements of heterogeneous catalysts · CPC title
Vanadium · CPC title
Mixed oxides other than spinels, e.g. perovskite · CPC title
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- What does patent US10065180B2 cover?
- The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus modified with alkali metal. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly u…
- Who is the assignee on this patent?
- Eastman Chem Co
- What technology area does this patent fall under?
- Primary CPC classification B01J27/199. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 04 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).