Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
220 words
A process for preparing an ether having a tertiary alkyl group by reacting a primary or secondary alcohol with a tertiary olefin represented by the formula, wherein R 1 is hydrogen or an alkyl group, and R 2 and R 3 are alkyl groups, the tertiary olefin being part of a hydrocarbon mixture, characterized in that said reaction is carried out at a pressure higher than the pressure at which the tertiary olefin-containing hydrocarbon mixture is kept in the liquid phase, in the presence of an adduct of the starting alcohol with a heteropoly acid or salt thereof containing at least one element selected from P, Si, B, Ge, As, Se, Ti, Zr, Mn, F, U, Ce and Th as a central element, at least Mo and/or W as a coordinating element and at least one of the cations of H,Li, Na, K, Rb, Cs, NR 4 R 5 R 6 R 7 in which R 4 , R 5 , R 6 and R 7 are hydrogen atoms or alkyl groups, Mg, Ca, Ba, Zr, Cr, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, Hg, Al, Pb and Bi, the ratio of the number of the coordinating elements to the number of the central elements being from 2.5 :1 to 12:1, the adduct being in a substantially solid-phase state.
Claim 2
Dependent Claim
220 words
A process for preparing an ether having a tertiary alkyl group by reacting a primary or secondary alcohol with a tertiary olefin represented by the formula, wherein R 1 is hydrogen or an alkyl group, and R 2 and R 3 are alkyl groups, the tertiary olefin being part of a hydrocarbon mixture, characterized in that said reaction is carried out at a pressure higher than the pressure at which the tertiary olefin-containing hydrocarbon mixture is kept in the liquid phase, in the presence of an adduct of the starting alcohol with a heteropoly acid or salt thereof containing at least one element selected from P, Si, B, Ge, As, Se, Ti, Zr, Mn, F, U, Ce and Th as a central element, at least Mo and/or W as a coordinating element and at least one of the cations of H,Li, Na, K, Rb, Cs, NR 4 R 5 R 6 R 7 in which R 4 , R 5 , R 6 and R 7 are hydrogen atoms or alkyl groups, Mg, Ca, Ba, Zr, Cr, Mn, Fe, Co, Ni, Cu, Ag, Zn, Cd, Hg, Al, Pb and Bi, the ratio of the number of the coordinating elements to the number of the central elements being from 2.5 :1 to 12:1, the adduct being in a substantially solid-phase state.
Claim 3
Dependent Claim
24 words
A process according to Claim 1, wherein the molar ratio of the primary or secondary alcohol to the tertiary olefin is 1.2:1 or less.
Claim 4
Dependent Claim
28 words
A process according to Claim 1 or 2, wherein the concentration of the primary or secondary alcohol dissolved in the hydrocarbon mixture is 8% by weight or less.
Claim 5
Dependent Claim
29 words
A process according to any one of Claims 1 to 3, wherein the adduct of the starting alcohol with the heteropoly acid or salt thereof is supported on silica.
Claim 6
Dependent Claim
30 words
A process according to any one of Claims 1 to 3, wherein the adduct of the starting alcohol with the heteropoly acid or salt thereof is supported on active carbon.
Claim 7
Dependent Claim
31 words
A process according to any one of Claims 1 to 5, wherein the heteropoly acid contains at least one element selected from P, Si, B and Ge as the central element.
Claim 8
Dependent Claim
29 words
A process according to any one of Claims 1 to 6, wherein the heteropoly acid contains at least one of the cations of H, Na, Zn, Al and Pb.
Claim 9
Dependent Claim
19 words
A process according to any one of Claims 1 to 6, wherein the heteropoly acid contains H + .
Claim 10
Dependent Claim
29 words
A process according to any one of Claims 1 to 8, wherein the coordinating elements include at least one element selected.from V, Mn, Co, N, Cu, Zn, and Fe.
Claim 11
Dependent Claim
30 words
A process according to any one of Claims 1 to 9, wherein methanol is reacted with isobutylene present in a mixture of C 4 hydrocarbons to obtain tert.-butyl methyl ether.