Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 3

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  isomerization
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Content available remote

Transformations of xylenes in trimethylammonium hydrochloride-Aluminum chloride ionic liquid

100%
Ksenofontov V., Kustov L.
Open Chemistry
|
2003
|
vol. 1
|
issue 3
305-313
EN
Isomerization of m-, o-and p-xylenes in the presence of trimethylammonium hydrochloride-AlCl3 ionic liquid with different composition was studied. Ionic liquids with the following ammonium salt: AlCl3 molar ratios were used: 1∶2, 1∶1.5 and 1∶1.25. It was shown that isomerization of xylenes proceeds under mild conditions at temperatures from 60°C to 110°C. It was found that the activity and selectivity of the ionic liquids depends on their composition. The most effective catalyst was the ionic liquid with the ammonium salt: AlCl3 molar ratio equal to 1∶2.
2
Publication available in full text mode
Content available

Isomerization of bitter acids during the brewing process

100%
Dybowski M. P., Typek R., Bernacik K., Dawidowicz A. L.
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
|
2015
|
vol. 70
|
issue 2
EN
Beer is the world's oldest and most widely consumed alcoholic beverage. The transformation of bitter acids to iso-α and iso-ß-acids is recognized as the key step of beer production. The paper shows and discusses the transformation kinetics of α- and ß-acids into their iso-form. Following the performed experiments, the largest amounts of the bitter acids isomers are formed in the brewing process carried out at 80oC for more than 100 minutes. The presented data are in good agreements with the knowledge of experienced brewers who learned about the brewing process relying on sensory tests.
3
Content available remote

Utilization of waste chloroorganic compounds

88%
Myszkowski J., Milchert E., Bartkowiak M., Pełech R.
Polish Journal of Chemical Technology
|
2010
|
vol. 12
|
issue 3
36-39
EN
Efficient methods of utilization of waste chloroorganic compounds coming from waste water and the waste streams formed e.g. in the production of vinyl chloride by dichloroethane method and in the production of propylene oxide by chlorohydrin method have been presented. First the separation of chloroorganic wastes by the adsorption methods has been described in the article. Three valuable methods of chlorocompounds utilization have been then discussed. The first one is isomerization of 1,1,2-trichloroethane to 1,1,1-trichloroethane as the valuable product with less toxicity than a substrate. The second method is ammonolysis of waste 1,2-dichloropropane and 1,2,3-trichloropropane. The third described method is chlorolysis. This method can be used for the utilization of all types of waste chloroorganics.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.