New high stearic oilseed stearin fat and process for its preparation
A fatty acid and fat technology, which is applied in the field of new high stearic acid oilseed stearic fat and its preparation, can solve the problems of low oxidation stability and high linoleic acid content, and achieve the effect of wide melting range
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Embodiment 1
[0109] Example 1 - Oil Pressing and Refining
[0110] In the trials, the oil was obtained by pressing the seeds in a juicer and further solvent extraction. The extracted oil is then refined and bleached. The oil obtained by pressing is low in phosphorus and therefore does not degumming. Free fatty acids were removed by chemical neutralization with Baumé lye (12°, 2.8M) at 15°C for 40 minutes. The neutralized soap is removed by centrifugation and multiple water washes followed by centrifugation. Excess pigment was removed by bleaching with Tonsil fuller's earth (1% w / w) at 70°C for 10 minutes. The neutralized / bleached oil was then deodorized at 200°C for 3 hours under vacuum applying a continuous stream of steam. The oil may or may not be dewaxed.
Embodiment 2
[0111] Analysis and calculation of embodiment 2-results
[0112] 2.1. TAG analysis
[0113] The composition of TAG species was analyzed by gas chromatography on an Agilent 7890 gas chromatograph equipped with a 30 m Quadrex aluminum clad bond according to Fernandez-Moya et al. Methyl 65% phenyl silicon capillary column, 0.25mm ID, 0.1 micron film thickness, using hydrogen as carrier gas and FID detector. Calculate TAG category (SSS, SUS, SUU, UUU) results based on detailed TAG category results.
[0114] 2.2. Analysis of fatty acid composition and S 总 calculation
[0115] The fatty acid composition analysis was based on the ISO / TS 12966-4:2015 standard method. Fatty acid methyl esters derived from fats, oils, and fatty acids by transesterification or esterification were analyzed by capillary gas chromatography in a Hewlett-Packard 6890 gas chromatograph equipped with a Supelco SP-2380 fused silica capillary column. Different methyl esters were identified by comparing...
Embodiment 3
[0126] Example 3 - Partial Random Interesterification and Fractionation of HSHO Seed Oil
[0127] Refined, dewaxed or preferably undewaxed HSHO sunflower oil is partially random transesterified by enzymatic reactions and subjected to fractionation, drying or solvent fractionation, see below. The reaction was carried out in a reactor in the presence of 5% w / w of commercially available lipase TL IM (Novozymes) previously conditioned with the same oil under vacuum for 1 hour to remove moisture And prevent TAG hydrolysis. The rearrangement reaction was carried out at 70° C. for 10 h in a stirred batch reactor, and the stirring rate was kept at 150 r.p.m. Once the reaction is complete, the immobilized enzyme is isolated by vacuum filtration through a multiwell plate. This enzyme can be reused for subsequent rearrangement reactions. The oil composition before and after the enzymatic reaction is shown in Table 1. The modified oil is then fractionated. The jacketed crystallizer...
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