摘要:
A hollow camshaft for automotive engines, which is made of cast iron, and which has at least one as-cast oil-feeding hole on the chilled faces of cam members is disclosed. When a camshaft is cast, thin carbon rod cores are used as cores which are enveloped in casting. After removing the carbon rods by burning them, small as cast oil-feeding holes are left in cam members.
摘要:
Provided is a method for manufacturing refined fats and oils. Here fats and oils are brought into contact with an adsorbent and subsequently treated with water vapor under at least one condition of the following conditions. In condition I, the time for which the fats and oils are brought into contact with the water vapor in a temperature range of 175° C. to 205° C. for from 5 to 110 minutes. In condition 2, the fats and oils are brought into contact with the water vapor in a temperature range of 205° C. to 215° C. for from 5 to 50 minutes. In condition 3, the fats and oils are brought into contact with the water vapor in a temperature range of 215° C. to 230° C. for from 5 to 30 minutes.
摘要:
Provided is an oil or fat composition, which has an MCPD-FS content (ppm) of 13 ppm or less, the content being measured by a Deutsche Gesellschaft für Fettwissenschaft (DGF) standard method C-III 18(09), has a diacylglycerol content of 15 mass % or more, and is subjected to deodorization treatment.
摘要:
Provided is a preparation process of diglycerides which comprises reacting a fatty acid or lower alkyl ester thereof with glycerin in the presence of an immobilized partial glyceride lipase while removing water, which is generated upon reaction, out of the system. The reaction is preferably terminated when the acid value (AV) of the reaction mixture satisfies the following range: 50R-60>AV>70R-150 (with the proviso that AV>0). The present process makes it possible to efficiently prepare a high purity of diglycerides without impairing lipase activity even under reduced pressure. The present process is effective without being influenced by variations in reaction conditions such as fatty acid/glycerin ratio, reaction temperature or enzyme concentration. Particularly, even when the fatty acid/glycerin ratio is high, a high purity of diglycerides can be produced at a high reaction yield.
摘要:
A method for manufacturing a refined fat or oil, including: carrying out a first steam treatment of bringing a fat or oil into contact with water vapor; and subsequently carrying out a second steam treatment of bringing the fat or oil having a temperature lower by 10° C. or more than a temperature of the fat or oil in the first steam treatment into contact with water vapor in the presence of an organic acid.
摘要:
A method for manufacturing a refined fat or oil, including: carrying out a first steam treatment of bringing a fat or oil into contact with water vapor; subsequently carrying out a treatment of bringing the fat or oil into contact with an adsorbent; and further carrying out a second steam treatment of bringing the fat or oil having a temperature lower by 10° C. or more than a temperature of the fat or oil in the first steam treatment into contact with water vapor.
摘要:
A process for producing fatty acid by hydrolyzing oil and fat, which comprises: a first step of partially hydrolyzing oil and fat by either of the following method (a) or (b), and a second step of hydrolysis by the other method: (a) enzymatic hydrolysis using an immobilized enzyme which is an enzyme immobilized on a support and (b) high pressure and temperature hydrolysis. A method of efficiently producing fatty acid with a reduced content of trans-unsaturated fatty acid in the constituent fatty acids and having a good appearance with reduced coloring by hydrolysis of oil and fat is provided.
摘要:
A lipolytic enzyme such as lipase is adsorbed on a porous anion-exchange resin carrier to obtain an immobilized enzyme without drying. The un-dried immobilized enzyme is contacted with a fat or oil for a time which may be about 2 hours to about 24 hours to stabilize the immobilized enzyme, and the immobilized enzyme is recovered from the fat or oil. The recovered immobilized enzyme is then used for esterifying or hydrolyzing a substrate. Water content of the un-dried immobilized enzyme may be 20% or more be weight such as 20-60%. Prior to immobilization, the resin carrier may be treated with a lypophylic aliphatic acid which preferably has 8 to 18 carbons.
摘要:
Provided is an oil or fat composition, which has an MCPD-FS content (ppm) of 13 ppm or less, the content being measured by a Deutsche Gesellschaft für Fettwissenschaft (DGF) standard method C-III 18(09), has a diacylglycerol content of 15 mass % or more, and is subjected to deodorization treatment.
摘要:
It is intended to provide a method for efficiently producing a diacylglycerol-rich fat and/or oil that has a low content of trans-unsaturated fatty acids and has a good color and a good flavor characteristic to diacylglycerols.A method for producing a diacylglycerol-rich fat and/or oil, by hydrolyzing a raw fat and/or oil by an enzymatic splitting method, and subjecting the fatty acids and glycerin obtained thereby to an esterification reaction, wherein a raw fat and/or oil containing undeodorized fat and/or oil in an amount of 50% by weight or more is used, and a deodorization treatment is carried out after the esterification reaction, to the extent that the relationship between the deodorization time (x) and the deodorization temperature (y) satisfies the following conditions (i) and (ii): y≧−2.59x+566 (i) y≦617x−0.0455 (provided that 475≦y≦563) (ii) wherein x represents the deodorization time (minutes), and y represents the deodorization temperature (K).