Hydrocarbon conversion processes using SSZ-31

A process for preparing a high octane product having an increased aromatics content comprising:

• (a) contacting a hydrocarbonaceous feed, which comprises normal and slightly branched hydrocarbons having a boiling range above about 40.degree. C. and less than about 200.degree. C. under aromatic conversion conditions with a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1, wherein said zeolite is substantially free of acidity;
• and
• (b) recovering an effluent having a higher octane than said hydrocarbonaceous feed.

A process for alkylating an aromatic hydrocarbon which comprises contacting under alkylating conditions at least a mole excess of an aromatic hydrocarbon with a C.sub.2 to C.sub.20 olefin under at least partial liquid phase conditions and in the presence of a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1.

A process for transalkylating an aromatic hydrocarbon which comprises contacting under transalkylating conditions an aromatic hydrocarbon with a polyalkyl aromatic hydrocarbon under at least partial liquid phase conditions and in the presence of a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1.

A process for preparing a product having an increased aromatic content comprising:

• (a) contacting a hydrocarbonaceous feed, which comprises normal and slightly branched hydrocarbons having a boiling range above about 40.degree. C. and less than about 200.degree. C. under aromatic conversion conditions with a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1, wherein said zeolite is substantially free of acidity;
• and
• (b) recovering an aromatic-containing effluent.

A process for the catalytic conversion of lower aliphatic alcohols having 1 to 8 carbon atoms to form gasoline boiling range hydrocarbons which comprises contacting the alcohols under converting conditions with a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1.

A process for converting a C.sub.2 -C.sub.6 olefin or paraffin feedstream to aromatic compounds comprising contacting the feed material under aromatic conversion conditions with a calcined zeolite having a mole ratio of an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof greater than about 50:1, and having the X-ray diffraction lines of the as-synthesized zeolite in Table 1.