Optimization of the sulfuric acid-catalyzed estolide synthesis from oleic acid

被引：21

作者：

Isbell, TA ^{[1
]}

Frykman, HB ^{[1
]}

Abbott, TP ^{[1
]}

Lohr, JE ^{[1
]}

Drozd, JC ^{[1
]}

机构：

[1] CALGENE CHEM CO,SKOKIE,IL 60076

来源：

JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY | 1997年 / 74卷 / 04期

关键词：

estolide; oleic acid; oleic homopolymer; oligomerization; polyestolide; sulfuric acid;

D O I：

10.1007/s11746-997-0109-x

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The production of estolide from oleic acid with sulfuric acid as a catalyst was optimized for minimal acid concentration and temperature. Commercial oleic acid forms estolide optimally when reacted at 55 degrees C with 5% vol/vol concentrated sulfuric acid for 24 h under vacuum. The extent of oligomerization was 1.2 estolide units under these reaction conditions. Temperature plays a critical role in the rate of estolide formation as well as in the overall yield, with higher temperatures providing faster rates but lower yields. The ratio of sulfuric acid to oleic acid equivalents also plays a role, where higher acid concentrations gave faster rates and higher yields of estolide. Vacuum had a minor effect on oligomerization and estolide yield.

引用

页码：473 / 476

页数：4

共 5 条

[1]

ERHAN SM, BIODEGRADATION ESTOL

[2] ACID-CATALYZED CONDENSATION OF OLEIC-ACID INTO ESTOLIDES AND POLYESTOLIDES [J].