Method of forming an agent and its use in desulphurisation
US-9205367-B2 · Dec 8, 2015 · US
Method for preparing trimethylolpropane
US10947174B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10947174-B2 |
| Application number | US-201816472493-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 4, 2018 |
| Priority date | Oct 23, 2017 |
| Publication date | Mar 16, 2021 |
| Grant date | Mar 16, 2021 |
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Abstract
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A method for preparing trimethylolpropane, the method including: subjecting dimethylolbutanal (DMB) to a hydrogenation reaction in the presence of a metal catalyst and an alcohol solvent. During the hydrogenation reaction, a weight ratio of the alcohol solvent based to dimethylolbutanal is 2 to 10.
First claim
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The invention claimed is: 1. A method for preparing trimethylolpropane, the method comprising: subjecting dimethylolbutanal to a hydrogenation reaction in the presence of a metal catalyst and an alcohol solvent, wherein the alcohol solvent is 2-ethylhexanol, wherein a weight ratio of the alcohol solvent to dimethylolbutanal is 4 to 10, and wherein the metal catalyst is a copper-based metal catalyst. 2. The preparation method of claim 1 , wherein a reaction temperature of the hydrogenation reaction is 80° C. to 160° C. 3. The preparation method of claim 1 , wherein a reaction pressure of the hydrogenation reaction is 20 bar to 70 bar. 4. The preparation method of claim 1 , wherein during the hydrogenation reaction, a molar ratio of hydrogen to dimethylolbutanal is 1 to 3. 5. The preparation method of claim 1 , wherein a yield of trimethylolpropane is 98% or more. 6. The preparation method of claim 1 , further comprising: (A) preparing a dimethylolbutanal mixed product by subjecting n-butyraldehyde and formaldehyde to an aldol condensation reaction in the presence of an alkylamine catalyst; and (B) separating dimethylolbutanal from the dimethylolbutanal mixed product.
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by liquid-liquid treatment · CPC title
by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups · CPC title
Pressure · CPC title
Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling · CPC title
Controlling the temperature · CPC title
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- What does patent US10947174B2 cover?
- A method for preparing trimethylolpropane, the method including: subjecting dimethylolbutanal (DMB) to a hydrogenation reaction in the presence of a metal catalyst and an alcohol solvent. During the hydrogenation reaction, a weight ratio of the alcohol solvent based to dimethylolbutanal is 2 to 10.
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01J23/72. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 16 2021 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).