Deoxygenation of mucic and tartaric acid
(2019) KEMP20 20192Department of Chemistry
- Abstract
- Different homogenous and heterogenous catalysts, including different noble metals on silica or carbon and methyltrioxorhenium (MTO), were screened for their catalytic activity in the deoxydehydration of mucic and tartaric acid. A method for the determination of yields by NMR was developed and the reaction conditions, e.g. solvent composition and acidic catalyst, were optimized for tartaric acid.
These optimized conditions were then applied to mucic acid, but this gave only low yields, therefore the use of MTO and a separate hydrogenation step was attempted and gave better results. The hydrogenation step was then further optimized to employ lower temperatures and catalyst loadings. For this step both Pt on carbon and an Iridium pincer... (More) - Different homogenous and heterogenous catalysts, including different noble metals on silica or carbon and methyltrioxorhenium (MTO), were screened for their catalytic activity in the deoxydehydration of mucic and tartaric acid. A method for the determination of yields by NMR was developed and the reaction conditions, e.g. solvent composition and acidic catalyst, were optimized for tartaric acid.
These optimized conditions were then applied to mucic acid, but this gave only low yields, therefore the use of MTO and a separate hydrogenation step was attempted and gave better results. The hydrogenation step was then further optimized to employ lower temperatures and catalyst loadings. For this step both Pt on carbon and an Iridium pincer complex were screened as potential catalysts. (Less) - Popular Abstract
- In recent years environmental problems and polution have gained much importance in the public´s eye. Especially the emission of greenhouse gases such as carbon dioxide and nitrous oxides from different sources, before all from industry and transport, have moved into focus here. This is why the topic of reducing these emissions has gained so much traction in scientific publications. Another aspect, that has seen a similar trend and which is also closely linked to the environmental discussion, is the issue of sustainability. As the resources of our planet are limited, we must find ways to reduce our use of them to an amount that can be replenished in the same timeframe. This is certainly an issue regarding our fossil fuel-based... (More)
- In recent years environmental problems and polution have gained much importance in the public´s eye. Especially the emission of greenhouse gases such as carbon dioxide and nitrous oxides from different sources, before all from industry and transport, have moved into focus here. This is why the topic of reducing these emissions has gained so much traction in scientific publications. Another aspect, that has seen a similar trend and which is also closely linked to the environmental discussion, is the issue of sustainability. As the resources of our planet are limited, we must find ways to reduce our use of them to an amount that can be replenished in the same timeframe. This is certainly an issue regarding our fossil fuel-based transportation, but it is also an issue for the chemical industry, which is dependent on the use of natural oil, a not renewable and therefore not very sustainable raw material. The focus of green chemistry is to tackle these problems at their root by reducing emissions as well as by trying to find ways to use e.g. plants and thereby regrowing resources for these processes.
The main problem with the use of plant-based feedstocks, is that they need to be broken down to be used in these processes. This breakdown happens in complex chemical reactions and effective catalysts need to be developed for this to work. A catalyst is used in chemical reactions to speed them up, because otherwise they would take very long. As a consequence catalysts make it possible to use these reactions in an industrial process.
The focus of this work is the development of a catalyst that is needed to turn sugar beet residues into a chemical that is needed in very large amounts for the production of certain plastic types. The currently used industrial process for the production of this chemical has two major environmental disadvantages. It not only uses oil as starting point, but also produces large amounts of a greenhouse gas.
Another process, we tried to improve, is the breakdown of a chemical, obtained from grapes, into another chemical, that can be used as feedstock for a variety of different chemical processes, which result in different widely used chemicals.
For the two processes described above, different types of catalysts, that are known to work in these types of breakdowns, have been tested and their effectiveness was determined for our reactions. We also did experiments on improving those catalysts and the conditions under which they can be used. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9002175
- author
- Schuldt, Moritz LU
- supervisor
-
- Ola Wendt LU
- organization
- course
- KEMP20 20192
- year
- 2019
- type
- L3 - Miscellaneous, Projetcs etc.
- subject
- keywords
- deoxygenation, mucic acid, tartaric acid
- language
- English
- id
- 9002175
- date added to LUP
- 2020-02-17 13:17:41
- date last changed
- 2020-02-17 13:17:41
@misc{9002175,
abstract = {{Different homogenous and heterogenous catalysts, including different noble metals on silica or carbon and methyltrioxorhenium (MTO), were screened for their catalytic activity in the deoxydehydration of mucic and tartaric acid. A method for the determination of yields by NMR was developed and the reaction conditions, e.g. solvent composition and acidic catalyst, were optimized for tartaric acid.
These optimized conditions were then applied to mucic acid, but this gave only low yields, therefore the use of MTO and a separate hydrogenation step was attempted and gave better results. The hydrogenation step was then further optimized to employ lower temperatures and catalyst loadings. For this step both Pt on carbon and an Iridium pincer complex were screened as potential catalysts.}},
author = {{Schuldt, Moritz}},
language = {{eng}},
note = {{Student Paper}},
title = {{Deoxygenation of mucic and tartaric acid}},
year = {{2019}},
}