LIQUID OIL AND FAT, AND PRODUCTION METHOD THEREFOR
The invention provides an inexpensive liquid oil having both particularly high liquid properties and oxidation stability and a solid fat containing a large amount of PPP at high yield, from inexpensive palm based oil and fat as a raw material. A palm based oil and fat containing saturated fatty acids in an amount of 70% wt or less based on the amount of constituent fatty acids are used as a main raw material, the palm based oil and fat are direct-transesterified until the oil and fat obtain an SSS/S2U ratio of 0.5 or more and an S2U content of 14% wt or less, while keeping the SSS content at 31% wt or less during the reaction, and then a liquid oil and a solid fat are separated.
1 . A liquid oil derived from palm oil, the liquid oil being obtained from palm based oil and fat as a main raw material and having an SU2/UUU ratio by weight of 1.9 or less and an SSS content of 2% by weight or less, and containing a glyceride bonded with palmitic acid at a 2-position in an amount of 10 to 30% by weight.
2 . The liquid oil derived from palm oil according to claim 1 , wherein the SSS is contained in an amount of 0.5% by weight or less and the S2U is contained in an amount of 10% by weight or less.
3 . The liquid oil according to claim 1 , wherein the UUU is contained in an amount of 25% by weight or more.
4 . (canceled)
5 . The liquid oil according to claim 1 , wherein the liquid oil has a cloud point ranging from 0° C. to −12° C.
6 . A method for producing the liquid oil as claimed in claim 1 , the method comprising:
using a palm based oil and fat containing a saturated fatty acid in an amount of 70% by weight or less based on a total amount of constituent fatty acids, as a main raw material;
direct-transesterifying the palm based oil and fat until the palm based oil and fat obtain an SSS/S2U ratio of 0.5 or more;
terminating the direct-transesterification reaction; and thereafter
separating and removing a hard part.
7 . The method for producing the liquid oil according to claim 6 , wherein the palm based oil and fat are direct-transesterified until the palm based oil and fat obtain an SSS/S2U ratio of 2.0 or more and then the direct-transesterification reaction is terminated.
8 . A method for producing the liquid oil as claimed in claim 1 the method comprising:
using a palm based oil and fat containing a saturated fatty acid in an amount of 70% by weight or less based on a total amount of constituent fatty acids, as a main raw material;
direct-transesterifying the palm based oil and fat while applying external force thereby to move the palm based oil and fat; and thereafter
separating a hard part while keeping a solid fat content at more than 1% by weight.
9 . The method for producing the liquid oil according to claim 8 , wherein the palm based oil and fat are direct-transesterified until the palm based oil and fat obtain an SSS/S2U ratio of 0.5 or more and then the direct-transesterification reaction is terminated.
10 . The method for producing the liquid oil according to claim 6 , wherein the palm based oil and fat are direct-transesterified until the palm based oil and fat obtain an S2U content of 14% by weight or less, the palm based oil and fat keeping an SSS content of 31% by weight or less during the direct-transesterification reaction, and then the hard part is separated and removed.
11 . The method for producing the liquid oil according to claim 6 , wherein the palm based oil and fat contain the saturated fatty acid in an amount of 3 to 52% by weight based on a total amount of constituent fatty acids.
12 . The method for producing the liquid oil according to claim 6 , wherein the palm based oil and fat is palm olein.
13 . The method for producing the liquid oil according to claim 6 , wherein soybean oil and/or rapeseed oil is used as an oil and fat in addition to the palm based oil and fat.
14 . The method for producing the liquid oil according to claim 6 , wherein the direct transesterification is carried out at a temperature of 0° C. to 40° C.
15 . The method for producing the liquid oil according to claim 6 , wherein the separation is dry separation.
16 . The method for producing the liquid oil according to claim 15 , wherein the dry separation is carried out at a temperature of 0° C. to 45° C.
17 . The method for producing the liquid oil according to claim 15 , wherein the dry separation is carried out at a temperature of 0° C. to 10° C.
18 . A liquid oil produced by the method as claimed in claim 6 .
19 . A food containing the liquid oil as claimed in claim 15 .
20 . A food containing the liquid oil as claimed in claim 18 .
21 . A method for producing a solid fat concurrently with a liquid oil, said liquid oil having an SU2/UUU ratio by weight of 1.9 or less and an SSS content of 2% by weight or less, and containing a glyceride bonded with palmitic acid at a 2-position in an amount of 10 to 30% by weight, the method comprising:
using a palm based oil and fat containing a saturated fatty acid in an amount of 70% by weight or less based on a total amount of constituent fatty acids, as a main raw material;
direct-transesterifying the palm based oil and fat until the palm based oil and fat obtain an SSS/S2U ratio of 0.5 or more;
terminating the direct-transesterification reaction; and thereafter
separating and removing the liquid oil.
22 . A method for producing a solid fat concurrently with a liquid oil, said liquid oil having an SU2/UUU ratio by weight of 1.9 or less and an SSS content of 2% by weight or less, and containing a glyceride bonded with palmitic acid at a 2-position in an amount of 10 to 30% by weight, the method comprising:
using a palm based oil and fat containing a saturated fatty acid in an amount of 70% by weight or less based on a total amount of constituent fatty acids, as a main raw material;
direct-transesterifying the palm based oil and fat while applying external force thereby to move the palm based oil and fat; and thereafter
separating and removing the liquid oil while keeping a solid fat content at more than 1% by weight.
23 . The method for producing a solid fat concurrently with a liquid oil according to claim 22 , wherein the palm based oil and fat are direct-transesterified until the palm based oil and fat obtain an S2U content of 14% by weight or less, the palm based oil and fat keeping an SSS content of 31% by weight or less during the direct-transesterification reaction, and then the liquid oil is separated and removed.