申请人:Asbahr Hark-Oluf
公开号:US20090158644A1
公开(公告)日:2009-06-25
The invention relates to a process for increasing the oxidation stability of biodiesel, in which at least one aging stabilizer of the structure I
where:
R=hydrogen, alkyl, alkenyl, alkynyl, alkoxy, alkylaryl, arylalkyl, cycloalkyl, hydroxyl or aryl group
A=R
5
(AI) or —NR
1
R
2
(AII) and
B=R
6
(BI),
where R
1
, R
2
, R
3
, R
4
, R
5
and R
6
=hydrogen, alkyl, alkenyl, alkynyl, alkoxy, alkylaryl, arylalkyl, cyclo-alkyl, hydroxyl or aryl group, are the same or different, and the phenyl or naphthyl structural unit in structure I, BII and BIII has one, two or three substituents of the R
3
, R
4
and/or R
5
type,
is added to the biodiesel to be stabilized in an amount of from 5 to 20 000 ppm (w/w), to the use of these aging stabilizers to increase the oxidation stability of biodiesel, and to the correspondingly oxidation-stabilized biodiesel.