Hydrogenated rapeseed oil

As was pointed out earlier in this chapter, canola oil is a natural salad oil and normally does not require winterizing. However, when there is a requirement for a liquid oil of improved stability, Teasdale (1966) has shown that canola oil offers a better source than either HEAR oil or soybean oil. Low erucic acid rapeseed oil, hydrogenated to 0.8% linolenic acid, was winterized to give a yield of 94-95% of salad oil having a cold test of 12 hr. HEAR oil, also hydrogenated to the 0.8% linolenic level, gave a yield of 75% having a cold test of 6 hr. 

Chem. Descrip. Hydrogenated rapeseed oil, hydrogenated cottonseed oil Ionic Nature Nonionic... 

Figure 13.12 Fatty acid composition of rapeseed oil, (a) before and (b) after industrial partial hydrogenation. (Courtesy of A. Stolyhwo, Transfatty acids in the human diet and the human body. Paper presented at the First International Conference on Advanced Analysis - Exploring Biological Systems in Food. Olsztyn, September 6, 2003.)...

Figure 13.13 Fatty acid isomers in partially hydrogenated rapeseed oil (a) all fatty acids, (b) C18 l cis fatty acids, (c) C18 l trans fatty acids, (d) structure of C18 l A 5 trans fatty acid, and (e) structure of C18 l A15 trans fatty acid. (Courtesy of A. Stolyhwo.)...

Figure 13.14 Trans isomers of C18 l fatty acids of (a) partially hydrogenated rapeseed oil and (b) milk fat. (Courtesy of A. Stolyhwo.)...

The concentrations at the catalyst surface (both hydrogen and substrate) can be controlled independently of other process conditions. The unique feature is that very high concentrations of hydrogen can be achieved this leads, for example, to the suppression of trans-fatty acids in partial hydrogenation of methylated rapeseed oil [29]. 

For CBE manufacture, fractionation is preferred to hardening by hydrogenation, which causes melting behaviour unsuitable for bar chocolate. Hydrogenation is however used to produce CBR and CBS from palm or palm kernel oil and rapeseed oil. Fats containing a substantial proportion of lauric acid (lauric fats) which are not compatible with cocoa butter are used in CBS and CBR. 

Alouche et al. studied the selective hydrogenation of rapeseed oil over reduced Ni-Ce oxides and the effects of aluminum incorporation to them. The binary Ce-Ni oxide presented a good selectivity in the partial hydrogenation, as studied in a flow system at temperatures of 190-250°C, but with a large 7JE isomerization. On the other hand, use of ternary Ce-Ni-Al oxides [e.g., Ce/Al = 1, Ni/(Ce + Al) = 5], prepared from the nitrates of cerium, nickel, and aluminum by coprecipitation using potassium hydroxide, allowed a decrease in the extent of the 7JE isomerization.100... 

Labeling Rapeseed Oil products that have been fully hydrogenated should be labeled as Fully Hydrogenated Rapeseed Oil. Label to indicate the 1-Monoglyceride Content as well. Identification Fully Hydrogenated Rapeseed Oil exhibits the following composition profile of fatty acids determined as directed under Fatty Acid Composition, Appendix VII. 

Fully Hydrogenated Rapeseed Oil occurs as a white, waxy, odorless solid that is a mixture of triglycerides. The saturated fatty acids are found in the same proportions that result from the full hydrogenation of fatty acids occurring in natural high erucic acid rapeseed oil. The rapeseed oil is obtained from Brassica juncea,... 

Brassica napus, and Brassica rapa of the family Cruciferae. It is made by hydrogenating high erucic acid rapeseed oil in the presence of a nickel catalyst at temperatures not exceeding 245°. 

Labeling Rapeseed oil products that have been fully hydrogenated should be labeled as Fully Hydrogenated Rapeseed Oil. Label to indicate 1-Monoglyceride content. 

Identification Fully Hydrogenated Rapeseed Oil exhibits the following composition profile of fatty acids as determined under Fatty Acid Composition, Appendix VII. 

Labeling Indicate Rapeseed Oil products that have added glycerin (glycerol) and are fully hydrogenated as fully hydrogenated and superglycerinated Rapeseed Oil. The 1-Monoglyceride Content and Hydroxyl Value should conform to the representations of the vendor, and this should be indicated as well. 

Fully Hydrogenated Rapeseed Oil, 44 Furfuryl Alcohol, 74, 100 2-I ui yl Methyl Ketone, 74, 100 Fusel Oil, Refined, 76... 

Superglycerinated Fully Hydrogenated Rapeseed Oil, 45 Synthetic Amorphous Silica, 51... 

SYNS COLZA OIL FULLY HYDROGENATED R- PESEED OIL LOW ERUCIC ACID RAPESEED OIL... 

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