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ZnO nanoparticle catalysts for use in transesterification and esterification reactions and method of making
US8975426B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8975426-B2 |
| Application number | US-201013378931-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 16, 2010 |
| Priority date | May 19, 2008 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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A method of forming a product from an oil feedstock, such as a biodiesel product, and a heterogeneous catalyst system used to form said product is disclosed. This catalyst system, which has a high tolerance for the presence of water and free fatty acids (FFA) in the oil feedstock, may simultaneously catalyze both the esterification of FAA and the transesterification of triglycerides present in the oil feedstock. The catalyst system is comprised of a mixture of zinc oxide and a second metal oxide. The zinc oxide includes a mixture of amorphous zinc oxide and zinc oxide nanocrystals, the zinc nanocrystals having a mean grain size between about 20 and 80 nanometers with at least one of the nanocrystals including a mesopore having a diameter of about 5 to 15 nanometers. Preferably, the second metal oxide is a lanthanum oxide, the lanthanum oxide being selected as one from the group of La 2 CO 5 , LaOOH, and combinations or mixtures thereof.
First claim
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What is claimed is: 1. A method of forming a product by heterogeneous catalysis, the method comprising: contacting a feedstock comprising a triglyceride and a free fatty acid with an alcohol in the presence of a heterogeneous catalyst, the catalyst comprising a mixture of zinc oxide nanocrystals and lanthanum oxide, the zinc oxide nanocrystals having a mean grain size between about 20 and 80 nanometers with at least one of the nanocrystals including a mesopore having a diameter of…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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- What does patent US8975426B2 cover?
- A method of forming a product from an oil feedstock, such as a biodiesel product, and a heterogeneous catalyst system used to form said product is disclosed. This catalyst system, which has a high tolerance for the presence of water and free fatty acids (FFA) in the oil feedstock, may simultaneously catalyze both the esterification of FAA and the transesterification of triglycerides present in …
- Who is the assignee on this patent?
- Yan Shuli, Salley Steven O, Ng K Y Simon, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B01J23/06. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 10 2015 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).