Hydrogenation of unrefined glyceride oils
First Claim
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1. A process for the hydrogenation of a crude glyceride oil which comprises:
- subjecting said oil to hydrogenation in a hydrogenation zone with hydrogen gas under hydrogenation conditions in the presence of greater than 0.02 weight percent nickel hydrogenation catalyst and of greater than about 0.2 weight percent copper chromite adjunct catalyst, said catalyst weight percent based on the weight of said oil,the concentration of said adjunct catalyst being established and maintained broadly proportional to the concentration of contaminants in said crude oil; and
discontinuing said hydrogenation after at least a significant increase in saturation of said oil has occurred.
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Abstract
Unrefined or crude glyceride oil is hydrogenated in rapid fashion in the presence of nickel hydrogenation catalyst and of copper chromite adjunct catalyst. In a preferred embodiment of the invention, a nickel-only secondary hydrogenation stage follows for making a stearine in extremely rapid fashion.
7 Citations
30 Claims
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1. A process for the hydrogenation of a crude glyceride oil which comprises:
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subjecting said oil to hydrogenation in a hydrogenation zone with hydrogen gas under hydrogenation conditions in the presence of greater than 0.02 weight percent nickel hydrogenation catalyst and of greater than about 0.2 weight percent copper chromite adjunct catalyst, said catalyst weight percent based on the weight of said oil, the concentration of said adjunct catalyst being established and maintained broadly proportional to the concentration of contaminants in said crude oil; and discontinuing said hydrogenation after at least a significant increase in saturation of said oil has occurred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A process for the hydrogenation of a crude glyceride oil wherein the resulting hydrogenated product has an Iodine Value (IV) not substantially above about 30, comprising:
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subjecting said crude oil to primary hydrogenation in a primary hydrogenation zone with hydrogen gas under hydrogenation conditions in the presence of between about 0.025 and about 0.3 weight percent nickel hydrogenation catalyst and of between about 0.25 and about 3 weight percent copper chromite adjunct catalyst, said catalyst weight percentages based on the weight of said oil in said primary zone; establishing and maintaining the concentration of said adjunct catalyst in said zone broadly proportional to the concentration of contaminants in said oil as measured by the proportion of contaminant phosphatide in said oil; discontinuing said primary hydrogenation at an intermediate Iodine Value (IV) of the oil in said primary zone of between about 10 and about 120; separating at least said ajunct catalyst from said oil; subjecting said primary hydrogenated oil to secondary hydrogentaion in a secondary hydrogenation zone with hydrogen gas under hydrogenation conditions in the presence of about 0.01 to about 0.3 weight percent nickel hydrogenation catalyst based on the weight of said oil in said secondary zone; discontinuing said secondary hydrogenation when the Iodine Value (IV) of said oil in said secondary zone is less than said intermediate Iodine Value (IV) and not substantially above about 30; and withdrawing said resulting hydrogenated product from said secondary hydrogenation zone. - View Dependent Claims (29, 30)
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Specification