Chemical methods for treating a metathesis feedstock
First Claim
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1. A method of metathesizing a feedstock comprising:
- providing a feedstock comprising a natural oil;
chemically treating the feedstock with a reducing agent under conditions sufficient to diminish catalyst poisons in the feedstock through a chemical reaction of the catalyst poisons producing a treated feedstock; and
following chemically treating, combining a metathesis catalyst with the treated feedstock under conditions sufficient to metathesize the treated feedstock in a metathesis reaction,wherein the reducing agent is selected from the group consisting of bisulfites, phosphines, and thiosulfates.
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Abstract
Various methods are provided for metathesizing a feedstock. In one aspect, a method includes providing a feedstock comprising a natural oil, chemically treating the feedstock under conditions sufficient to diminish catalyst poisons in the feedstock, and, following the treating, combining a metathesis catalyst with the feedstock under conditions sufficient to metathesize the feedstock.
64 Citations
24 Claims
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1. A method of metathesizing a feedstock comprising:
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providing a feedstock comprising a natural oil; chemically treating the feedstock with a reducing agent under conditions sufficient to diminish catalyst poisons in the feedstock through a chemical reaction of the catalyst poisons producing a treated feedstock; and following chemically treating, combining a metathesis catalyst with the treated feedstock under conditions sufficient to metathesize the treated feedstock in a metathesis reaction, wherein the reducing agent is selected from the group consisting of bisulfites, phosphines, and thiosulfates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of metathesizing a feedstock comprising:
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providing a feedstock comprising a natural oil; chemically treating the feedstock with a reducing agent under conditions sufficient to diminish non-peroxide poisons in the feedstock through a chemical reaction of the non-peroxide poisons producing a treated feedstock; and following chemically treating, combining a metathesis catalyst with the treated feedstock under conditions sufficient to metathesize the treated feedstock in a metathesis reaction, wherein the reducing agent is selected from the group consisting of bisulfites, phosphines, and thiosulfates.
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16. A method of metathesizing a feedstock comprising:
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providing a feedstock comprising a natural oil having a starting peroxide value; chemically treating the feedstock with a reducing agent for a time sufficient to reduce the starting peroxide value of the feedstock by approximately 80% or more through a chemical reaction of the peroxide poisons producing a treated feedstock; following chemically treating, combining a metathesis catalyst with the treated feedstock under conditions sufficient to metathesize the treated feedstock in a metathesis reaction, wherein the reducing agent is selected from the group consisting of bisulfites, phosphines, and thiosulfates. - View Dependent Claims (17)
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18. A method of metathesizing a feedstock comprising:
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providing a feedstock comprising a natural oil having a peroxide value of greater than 5 meq/kg; decreasing the peroxide value to 0.5 meq/kg or less by chemically treating the feedstock with a reducing agent or a cation-inorganic base composition producing a treated feedstock; and then, combining a metathesis catalyst with the treated feedstock under conditions sufficient to metathesize the treated feedstock in a metathesis reaction, wherein the metathesis reaction comprises a maximum theoretical conversion limit, and wherein the metathesis catalyst catalyzes the metathesis of at least 50% of the maximum theoretical conversion limit. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification