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Lewis Base Additives Improve the Zeolite Ferrierite-Catalyzed Synthesis of Isostearic Acids

Author:
Helen L. Ngo
Source:
The journal of the American Oil Chemists' Society 2015 v.92 no.4 pp. 613-619
ISSN:
0003-021X
Subject:
neutralization, biolubricants, isomerization, fatty acids, polyolefin, catalytic activity, zeolites, oils, chemists, composite polymers, cosmetics, additives
Abstract:
Isostearic acids (IA) are highly utilized for industrial purposes especially in the area of biolubricants, such as cosmetics and slip additives for polyolefin and related copolymer films. This study was designed to develop a zeolitic catalysis process for efficient IA production through isomerization of fatty acids. The process utilized zeolite protonated Ferrierite with a small amount of base additive to neutralize (i.e., poison) the acidic sites on the external surfaces of the zeolite particles to prevent side reactions. Of the six base additives examined, the proton sponge combined with the zeolite protonated Ferrierite was found to be the most effective for this isomerization. With only 0.5 wt% proton sponge additive to 5.0 wt% Ferrierite, the dimers were successfully suppressed from 20.6 wt% yield to 2.42 wt% with an IA yield of 83.4 wt% and a 98 % conversion.
Agid:
60656
Handle:
10113/60656