Perspective approaches with the use of biocatalysts for improving the processes of polyaspartic acid production from oil benzene fraction after oxidative desulfurizationстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:Two promising approaches to greening the production of polyaspartic acid were
demonstrated. The mixture of dibenzothiophene-sulfone (DBTО2) and benzothiophene-sulfone
(BTО2) as potential products of oxidative desulfurization of petroleum products during
benezene production was used for the first time for biocatalytic recovery to sulphide ions. The
process was carrying out at the presence of biogenic H2 produced during cultivation of
anaerobic cells Clostridium acetobutylicum and Desulfovibrio vulgaris. It was shown that after
240 h conversion of sulfur, contained in mixture of 0.03 mM DBTО2 and 0.03 mM BTО2 was
as minimum 32.2±2.1% using ethanol as extractant. This approach can be recommended for
intensification and ecologization of oxidative desulfurization of various petroleum products.
For production of stereoregular polymer of polyaspartic acid the correction of native process of
chemical synthesis was done by addition of biocatalytic stage during conversion of ammonium
fumarate into aspartic acid. The obtained immobilized biocatalyst on a base of E. coli BL-21
cell included into poly(vinyl) alcohol cryogel make it possible to accumulate 129.1±3.4 g/L
aspartic acid during biotransformation of ammonium fumarate.