A hydrocarbon conversion catalyst composition, useful for paraffin-olefin alkylation, can comprise a three dimensional crystalline zeolite molecular sieve having a pore size large enough to adsorb 2,2,3-trimethylpentane and having a composition expressed in terms of mole ratios of oxides as A(I.sub.2 O);b(IIO):c(III.sub.2/3 O):d(IV.sub.1/2 O)Al.sub.2 O.sub.3 :eSiO.sub.2 wherein I represents a monovalent metal cation; II represents a divalent metal cation; III represents a trivalent metal cation; IV represents a tetravalent cation; a has a value of from zero to 0.15; b has a value of from zero to 0.75; c and d each have values of from zero to 1; e has a value of from 2 to 20; with the proviso that when e has a value of from 2 to 3, the value of ((b+c)=0.75 to 1 and d=O; and with the proviso that when e has a value of > 3 to 4, the value of (b+c+d)=0.6 to 1.0; and with the further proviso that when e has a value of > 4 to 20, the value of (b+c+d)=0.25 to 1.0. In one embodiment said zeolite contains less than about 60 percent of its maximum OH exhibiting infrared absorption in the region of 3,480 to 3,670 cm..sup.-.sup.1 ; however in a slurry-reaction process the preferred catalysts have been activated at a temperature in the range of 400.degree.-500.degree.C. and contain about said maximum OH absorption. In the above catalyst, protons and/or ammoniumions can be present to preserve electronic equivalency. The degree of conversion of olefins and paraffins to saturated products can be increased by incorporation into the catalyst of a halide adjuvant containing bromine, chlorine or fluorine. One preferred catalyst can be represented, by the above formula as 0.1(I.sub.2 O):0.7(III.sub.2/3 O):Al.sub.2 O.sub.3 :4.7SiO.sub.2 where I is Na.sup.+ and III is a trivalent rare earth metal, such as Ce.sup.+.sup.3. More precisely, this catalyst can be represented as 0.1(Na.sub.2 O):0.2(H.sub.2 O):0.7(III.sub.2/3 O):Al.sub.2 O.sub.3 :4.7SiO.sub.2.
CROSS REFERENCES TO RELATED APPLICATIONS
The present application is a continuation-in-part of all of the following copending applications, of the present inventors, Francis William Kirsch, David S. Barmby, and John D. Potts: Serial No Filing Date Title __________________________________________________________________________ 581,129 8-25-66 Process for Paraffin-Olefin Alkyla- (Now Abandoned) tion 715,998 3-26-68 Gd Zeolite and Hydrocarbon Conver- (Now U.S. 3,624,173, issued sion Process with Gd Zeolite Catalyst 11-30-71) 716,190 3-26-68 Process for Paraffin Olefin Alkylation 749,714 8-2-68 Dy Zeolite and Hydrocarbon Con- (Now Abandoned) version Process with Dy Zeolite Catalyst 823,656 5-12-69 Paraffin-Olefin Alkylate Composition 830,687 6-5-69 Continuous Alkylation Process (now U.S. 3,655,813 issued 4-11-72) 840,110 6-16-69 Process for Producing Gasoline (Now Abandoned) Blending Components 34,209 5-4-70 Continuous Process for Producing (now U.S. 3,706,814 issued 12-19-72) Gasoline Blending Components 114,061 2-9-71 Process for Producing Gasoline Blending Components __________________________________________________________________________
The disclosure of all of the above-cited copending applications is hereby incorporated in the present application.
Molybdenum is ion exchanged into a crystalline aluminosilicate zeolite, replacing metals such as sodium, calcium, and potassium, by contacting the zeolite with an aqueous solution containing molybdenyl cations (i.e., MoO.sub.2.sup.2+) and having a pH below 7.0 but higher than that which would substantially affect the crystallinity of the zeolite. The resulting zeolite, when calcined or sulfided, is useful as a catalyst for hydrocarbon conversion reactions, particularly with respect to the hydrodealkylation of toluene to benzene and methane.
Molybdenum is ion exchanged into a crystalline aluminosilicate zeolite, replacing metals such as sodium, calcium, and potassium, by contacting the zeolite with an aqueous solution containing molybdenyl cations (i.e., MoO.sub.2.sup.2+) and having a pH below 7.0 but higher than that which would substantially affect the crystallinity of the zeolite. The resulting zeolite, when calcined or sulfided, is useful as a catalyst for hydrocarbon conversion reactions, particularly with respect to the hydrodealkylation of toluene to benzene and methane.
A hydrocarbon conversion catalyst composition, useful for paraffin-olefin alkylation, can comprise a three dimensional crystalline zeolite molecular sieve having a pore size large enough to adsorb 2,2,3-trimethylpentane and having a composition expressed in terms of mole ratios of oxides as wherein I represents a monovalent metal cation; II represents a divalent metal cation; III represents a trivalent metal cation; IV represents a tetravalent cation; a has a value of from zero to 0.15; b has a value of from zero to 0.75; c and d each have values of from zero to 1; e has a value of from 2 to 20; with the proviso that when e has a value of from 2 to 3, the value of ((b+c)=0.75 to 1 and d=0; and with the proviso that when e has a value of > 3 to 4, the value of (b+c+d)=0.6 to 1.0; and with the further proviso that when e has a value of > 4 to 20, the value of (b+c+d)=0.25 to 1.0. In one embodiment said zeolite contains less than about 60 percent of its maximum OH exhibiting infrared absorption in the region of 3480 to 3670 cm..sup.-1 ; however in a slurry-reaction process the preferred catalysts have been activated at a temperature in the range of 400.degree.-500.degree. C. and contain about said maximum OH absorption. In the above catalyst, protons and/or ammoniumions can be present to preserve electronic equivalency. The degree of conversion of olefins and paraffins to saturated products can be increased by incorporation into the catalyst of a halide adjuvant containing bromine, chlorine or fluorine. One preferred catalyst can be represented, by the above formula as where I is Na.sup.+ and III is a trivalent rare earth metal, such as Ce.sup.+3. More precisely, this catalyst can be represented as 0.1(Na.sub.2 O):0.2(H.sub.2 O):0.7(III.sub.2/3 O):Al.sub.2 O.sub.3 :4.7SiO.sub.2.
Molybdenum is ion exchanged into a crystalline aluminosilicate zeolite, replacing metals such as sodium, calcium, and potassium, by contacting the zeolite with an aqueous solution containing molybdenyl cations (i.e., MoO.sub.2.sup.2+) and having a pH below 7.0 but higher than that which would substantially affect the crystallinity of the zeolite. The resulting zeolite, when calcined or sulfided, is useful as a catalyst for hydrocarbon conversion reactions, particularly with respect to the hydrodealkylation of toluene to benzene and methane.
A catalyst for acid-catalyzed hydrocarbon conversions, in particular for the alkylation of olefins with isoparaffins, containing a crystalline zeolite with an SiO.sub.2--Al.sub.2O.sub.3 molar ratio of <10, the alkali cations of which are at least partially replaced by H.sup.+ ions and/or polyvalent cations, the residual concentration of alkali cations amounting to less than around 0.2% by weight, the concentration of the Bronsted centers, determined as a function of the pyridine chemisorbed on the catalyst surface, amounting to around 0.1 to 4 mmol/g of catalyst, and the ratio between the concentration of the acid centers of the Bronsted type (B) and of the Lewis type (L), expressed as the surface ratio of the absorption bands at 1540 .+-.5 cm.sup.-1 (B) and 1450 5 cm.sup.-1 (L) after heating to a temperature of 450.degree. C amounting to around 1.4 or higher, is described.
