JPH1025491A5

JPH1025491A5 -

Info

Publication number: JPH1025491A5
Application number: JP1996199793A
Authority: JP
Filing date: 1996-07-10
Publication date: 2004-07-15
Anticipated expiration: 2016-07-10

Description

【００５７】
実施例７
（１）豚脂（ヨウ素価＝６２．６）を実施例１（１）と同様の方法で水素添加してから、精製を行い、精製極度硬化豚脂とした。ヨウ素価は０．２であった。ナタネ（カノーラ）油２ｋｇ、水２ｋｇ及び１，３特異性のない粉末リパーゼ（カンディダ属起源）４０ｇを、３０℃に保った反応槽に仕込み、撹拌しながら２４時間反応させた。ろ過によりリパーゼを除き、グリセリン水を分離した後、流下薄膜式分子蒸留装置（蒸留温度＝１９０℃；真空度＝０．０１０Ｔｏｒｒ）により脂肪酸を得た。この脂肪酸の組成を表３に示す。[0057]
Example 7
(1) Pork fat (iodine value = 62.6) was hydrogenated in the same manner as in Example 1(1) and then purified to obtain purified, extremely hardened pork fat. The iodine value was 0.2. 2 kg of rapeseed (canola) oil, 2 kg of water, and 40 g of powdered lipase ( Candida origin) without 1,3 specificity were charged into a reaction vessel maintained at 30°C and reacted for 24 hours with stirring. The lipase was removed by filtration, and the glycerin water was separated. After that, fatty acids were obtained using a falling-film molecular distillation apparatus (distillation temperature = 190°C; vacuum = 0.010 Torr). The composition of this fatty acid is shown in Table 3.

【００６０】
（４）次に、実施例７（２）の分別によって除いた高融点油（１８５ｇ）と低融点油（４２５ｇ）を混合し、７５℃に保った前述のカラムに通してエステル交換反応を行った。
次いで、実施例７（２）のアセトンによる溶剤分別と同様の操作でアセトンによる溶剤分別を行い、高融点油及び低融点油を除き、中融点油、すなわち本発明による油脂組成物（Ｓ−７Ｂ）を２４０ｇ得た。[0060]
(4) Next, the high melting point oil (18.5 g ) and the low melting point oil (42.5 g ) removed by the fractionation in Example 7(2) were mixed and passed through the aforementioned column maintained at 75°C to carry out an ester exchange reaction.
Next, solvent fractionation with acetone was carried out in the same manner as in Example 7(2), and the high-melting point oil and low-melting point oil were removed to obtain 240 g of a medium-melting point oil, i.e., an oil and fat composition (S-7B) according to the present invention.

【００６３】
比較例４
豚脂１ｋｇを実施例５（２）と同様の条件で溶剤分別した。中融点油（Ｃ−４Ａ）は２３０ｇしか得られなかった。実施例５では（Ｓ−５Ａ）が４００ｇ得られており、本発明は従来の溶剤分別法に比して、著しく優れていた。
また中融点油（Ｃ−４Ａ）はＳ２Ｕを７８％含んでいたが、Ｓ２Ｕ画分を分取して２位置脂肪酸組成を調べたところ、不飽和脂肪酸を１２％含んでいた。つまり、この中融点油（Ｃ−４Ａ）はＳＳＵを６９％しか含まない一方、ＳＵＳを９％も含んでいた。このように、本発明の油脂組成物は従来の溶剤分別法に比して、ＳＳＵの含有率は高い一方、ＳＵＳの含有率は低く、優れていた。
次に前述の分別によって除いた高融点油（８０ｇ）と低融点油（６９０ｇ）を混合し、実施例５（４）と同様にしてエステル交換反応を行った。次いで、実施例５（４）と同様の条件で溶剤分別した。中融点油（Ｃ−４Ｂ）は１８５ｇ得られ、Ｓ２Ｕを７８％含んでいた。この油脂の２位置脂肪酸組成を調べたところ、２６％が不飽和脂肪酸だった。また、分別条件を変えてもＳＳＵの割合が増加することはなかった。
このように、豚脂を分別した高融点油と低融点油を用いてＳＳＵを製造してもその効率は低く、本発明は高い効率でＳＳＵを製造することができ、はるかに優れている。[0063]
Comparative Example 4
1 kg of lard was subjected to solvent fractionation under the same conditions as in Example 5 (2). Only 230 g of a medium melting point oil (C-4A) was obtained. In Example 5, 400 g of (S-5A) was obtained. The present invention was significantly superior to conventional solvent fractionation methods.
The mid-melting point oil (C-4A) contained 78% S2U, but when the S2U fraction was separated and the 2-position fatty acid composition was examined, it contained 12% unsaturated fatty acids. In other words, this mid-melting point oil (C-4A) contained only 69% SSU, but 9% SUS. Thus, the oil and fat composition of the present invention was superior to that obtained by conventional solvent fractionation, with a higher SSU content and a lower SUS content.
Next, the high-melting-point oil (80 g ) and the low-melting-point oil (690 g ) removed by the above-mentioned fractionation were mixed and subjected to a transesterification reaction in the same manner as in Example 5(4). Subsequently, solvent fractionation was carried out under the same conditions as in Example 5(4). 185 g of a medium-melting-point oil (C-4B) was obtained, containing 78% S2U. When the 2-position fatty acid composition of this oil was examined, 26% was unsaturated fatty acid. Furthermore, the proportion of SSU did not increase even when the fractionation conditions were changed.
Thus, even if SSU is produced using high-melting point oil and low-melting point oil fractionated from lard, the efficiency is low, but the present invention is far superior in that it can produce SSU with high efficiency.

Claims

(1) A process of mixing (a) the high-melting-point oil obtained in step (3) of the method according to claim 1 or 2 with (b) the low-melting-point oil obtained in step (3) of the method according to claim 1 or 2, and/or an unsaturated fatty acid having 16 to 24 carbon atoms, and/or an unsaturated fatty acid alkyl ester comprising an unsaturated fatty acid having 16 to 24 carbon atoms and a linear alkyl moiety having 1 to 4 carbon atoms, and then subjecting the mixture to a transesterification reaction using a lipase having 1,3-position specificity;
(2) A process for separating a triglyceride mixture from the reaction product of step (1), and (3) a process for removing high-melting point oils and low-melting point oils from the triglyceride mixture separated in step (2) by fractionation to separate an oil composition containing 1,2-saturated-3-unsaturated triglycerides as a medium-melting point oil.