11-01-2018 дата публикации
Номер: US20180009731A9
Catalytic conversion of ketoacids is disclosed, including methods for increasing the molecular weight of ketoacids. An exemplary method includes providing in a reactor a feedstock having at least one ketoacid. The feedstock is then subjected to one or more C—C-coupling reaction(s) in the presence of a catalyst system having a first metal oxide and a second metal oxide. 1. A method for increasing the molecular weight of a ketoacid , the method comprising:providing in a reactor a feedstock having at least one ketoacid; andsubjecting the feedstock to one or more C—C-coupling reaction(s), wherein the C—C-coupling reaction(s) are conducted in a presence of a solid acid catalyst system having a first metal oxide and a second metal oxide, and wherein a content of the at least one ketoacid in the feedstock is at least 30 wt-%.2. The method according to claim 1 , wherein the catalyst system has a specific surface area of from 10 to 500 m/g.3. The method according to claim 1 , wherein a total amount of the acid sites of the catalyst system ranges between 30 and 500 μmol/g.4. The method according to claim 1 , wherein the at least one ketoacid is a γ-ketoacid acid.5. The method according to claim 1 , wherein the content of the at least one ketoacid in the feedstock is at least 40 wt-% claim 1 , and/or the content of water in the feedstock is less than 5.0 wt-%.6. The method according to claim 1 , wherein the first metal oxide comprises:an oxide of one of W, Be, B, Mg, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Bi, La, Ce, Th, and the second metal oxide comprises:an oxide of one of Zr, Ti, Si, Al, V, Cr or a combination of these, the first metal oxide not being same as the second metal oxide.7. The method according to claim 1 , wherein the first metal oxide is supported on a metal oxide carrier claim 1 , wherein the carrier is selected from the group consisting of zirconia claim 1 , titania claim 1 , silica claim 1 , vanadium oxide claim 1 ...
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