High charge density metallophosphate molecular sieves
A new family of highly charged crystalline microporous metallophosphate molecular sieves has been synthesized. These metallophosphates are represented by the empirical formula of: R p+ r A + m M 2+ x E y PO z where A is an alkali metal cation, R is at least one quaternary organoammonium cation, M is a divalent metal such as zinc and E is a trivalent framework element such as aluminum or gallium. This family of high charge density metallophosphate materials are among the first metalloalumino(gallo)phosphate-type molecular sieves to be stabilized by combinations of alkali and quaternary organoammonium cations, enabling unique compositions. This family of high charge density metallophosphate molecular sieves has catalytic properties for carrying out various hydrocarbon conversion processes and separation properties for separating at least one component.
1. A microporous crystalline metallophosphate material having a three-dimensional framework of [M 2+ O 4/2 ] 2− , [EO 4/2 ] − and [PO 4/2] + and tetrahedral units and an empirical composition in the as synthesized form and on an anhydrous basis expressed by an empirical formula of:
R p+ r A + m M 2+ x E y PO z
where R is at least one of any quaternary ammonium cation, diquaternary ammonium cation triquaternary ammonium cation, quatroquaternary ammonium cation and mixtures thereof, “r” is the mole ratio of R to P and has a value of about 0.04 to about 1.0, “p” is the weighted average valence of R and varies from 1 to 4, A is an alkali metal selected from the group consisting of Li + , Na + , K + , Rb + and Cs + and mixtures thereof, “m” is the mole ratio of A to P and varies from 0.1 to 1.0, M is a divalent element selected from the group of Zn, Mg, Co, Mn and mixtures thereof, “x” is the mole ratio of M to P and varies from 0.2 to about 0.9, E is a trivalent element selected from the group consisting of aluminum and gallium and mixtures thereof, “y” is the mole ratio of E to P and varies from 0.1 to about 0.8 and “z” is the mole ratio of O to P and has a value determined by the equation:
z =( m+p·r+ 2· x+ 3· y+ 5)/2
and is characterized by a specific x-ray diffraction pattern.
2. The metallophosphate material of claim 1 where E is aluminum.
3. The metallophosphate material of claim 1 where E is gallium.
4. The metallophosphate material of claim 1 where R is at least one quaternary ammonium cation selected from the group consisting of tetramethylammonium (TMA + ), ethyltrimethylammonium (ETMA + ), propyltrimethylammonium (PTMA + ), isopropyltrimethylammonium, diethyldimethylammonium (DEDMA + ), trimethylbutylammonium (TMBA + ), methyltriethylammonium (MTEA + ), propylethyldimethylammonium (PEDMA + ), N,N-dimethylpiperidinium, N,N-dimethyl-3,5-dimethylpiperidinium, dipropyldimethylammonium (DPDMA + ), diethylmethylpropylammonium, trimethylpentylammonium (TMPA + ), dimethyldiisopropylammonium, tetraethylammonium (TEA + ), hexyltrimethylammonium (HTMA + ), methylethyldipropylammonium, triethylpropylammonium, dibutyldimethylammonium, benzyltrimethylammonium (BzTMA + ), diethyldipropylammonium, octyltrimethylammonium, tetrapropylammonium (TPA + ), decyltrimethylammonium, adamantyltrimethylammonium, methyltributylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, tetrabutylammonium (TBA + ) and mixtures thereof.
5. The metallophosphate material of claim 1 where R is at least one diquaternary ammonium cation selected from the group consisting of methylene-bis-(trimethylammonium), bis-1,2-(trimethylammonium)ethylene, bis-1,3(trimethylammonium)propane, bis-1,3-(trimethylammonium)-2-propanol, bis-1,4-(trimethylammonium)butane, bis-1,5-(trimethylammonium)pentane (i.e., pentamethonium), bis-1,6-(trimethylammonium)hexane (i.e., hexamethonium, HM 2+ ), bis-1,8-(trimethylammonium)octane, bis-1,10-(trimethylammonium)decane, bis-1,5-(triethylammonium)pentane (i.e., pentaethonium), bis-1,6-(triethylammonium)hexane (i.e., hexaethonium), bis-α,α′-(dimethylethylammonium)-p-xylene, bis-α,α′-(dimethylethylammonium)-m-xylene, bis-α,α′-(dimethylethylammonium)-o-xylene, bis-1,5-(N-methylpiperidinum)pentane and bis-1,6-(N-methylpiperidinum)hexane, N,N,N′,N′-tetramethyl-N,N′-p-xyleno-1,6-hexanediammonium, N,N,N′,N′-tetramethyl-N,N′-butano-1,6-hexanediammonium, N,N,N′,N′-tetramethyl-N,N′-hexano-1,6-hexanediammonium, N,N,N′,N′-tetraethyl-N,N′-hexano-1,5-pentanediammonium, N,N,N′,N′-tetramethyl-N,N′-m-xyleno-1,6-hexanediammonium, N,N,N′,N′-tetramethyl-N,N′-o-xyleno-1,2-ethylenediammonium, N,N,N′,N′-tetramethyl-N,N′-butano-1,2-ethylenediammonium, N,N,N′,N′-tetramethyl-N,N′-hexano-1,2-ethylenediammonium and mixtures thereof.
6. The metallophosphate material of claim 1 where R is at least one triquaternary ammonium cation selected from the group consisting of tris-1,3,5-(triethylammoniomethyl)benzene, tris-1,3,5-(trimethylammoniomethyl)benzene, tris-1,3,5-(dimethylethylammoniomethyl)benzene and mixtures thereof.
7. The metallophosphate material of claim 1 where R is at least one quatroquaternary ammonium cation selected from the group consisting of [(C 6 H 5 CH 2 )(Me 2 )N(—CH 2 CH(OH)CH 2 N(Me 2 )—) 3 CH 2 C 6 H 5 ] 4+ (i.e., dibenzylquatroquat), tetrakis-1,2,4,5-(trimethylammoniomethyl)benzene, tetrakis-1,2,4,5-(triethylammoniomethyl)benzene, tetrakis-1,2,4,5-(dimethylethylammoniomethyl)benzene and mixtures thereof.