申请人:Asbahr Hark-Oluf
公开号:US20060218855A1
公开(公告)日:2006-10-05
The invention relates to a method of increasing the oxidation stability of biodiesel, which comprises adding a primary antioxidant having a melting point of less than or equal to 40° C. to the biodiesel to be stabilized in an amount of from 10 to 20 000 ppm (w/w), where the primary antioxidant comprises at least one compound having the structure
where:
R
1
, R
2
=hydrogen, a linear alkyl group having from 1 to 20 carbon atoms or
where * is a carbon atom of the aromatic ring system,
R
3
, R
5
=hydrogen, a linear alkyl group having from 1 to 20 carbon atoms,
R
4
=hydrogen, a linear alkyl group having from 1 to 40 carbon atoms,
where both the substituents of the type R
1
and R
2
and those of the type R
3
and R
5
are in each case identical or different.
本发明涉及一种提高生物柴油氧化稳定性的方法,该方法包括向待稳定的生物柴油中添加熔点小于或等于 40°C 的一级抗氧化剂,添加量为 10 至 20 000 ppm (w/w),其中一级抗氧化剂包括至少一种具有以下结构的化合物
其中
R
1
, R
2
=氢、具有 1 至 20 个碳原子的直链烷基或
其中 * 是芳香环系统的一个碳原子、
R
3
, R
5
=氢、具有 1 至 20 个碳原子的直链烷基、
R
4
=碳原子数为 1 至 40 的直链烷基、
其中 R
1
和 R
2
和 R
3
和 R
5
在每种情况下都是相同或不同的。