Fluorided beidellite clay and process for preparing the clay
AssigneeUop LLC
InventorJennifer S. Holmgren
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Abstract
This invention relates to a novel beidellite clay, a process for preparing the clay and processes using the clay. The clay has the empirical formula A.sub.x (Al.sub.4)(Si.sub.8-x Al.sub.x)(O.sub.20)(OH.sub.4-u F.sub.u) where A is a cation, x is the moles of A and varies from about 0.1 to about 2, and u varies from about 0.1 to about 3.5. The clay is prepared from a reaction mixture containing reactive sources of aluminum and silicon, a cation salt, a fluoride source and water. The mixture is reacted at a pH of about 4 to about 9, a temperature of about 150.degree. to about 300.degree. C. for a time of about 1 to about 20 days. The clay composition may be used as is or after pillaring to catalyze hydrocarbon conversion processes such as alkylation.
Claims13
A beidellite layered clay composition having the empirical formula
- A.sub.x (Al.sub.4)(Si.sub.8-x Al.sub.x)(O.sub.20)(OH.sub.4-u F.sub.u)
- where A is a cation, x is the moles of the cation and varies from about 0.1 to about 2.0, and u varies from about 0.1 to about 3.5.
A process for preparing a beidellite layered clay composition having the empirical formula
- A.sub.x (Al.sub.4)(Si.sub.8-x Al.sub.x)(O.sub.20)(OH.sub.4-u F.sub.u)
- where A is a cation, x is the moles of the cation and varies from about 0.1 to about 2.0, and u varies from about 0.1 to about 3.5, the process comprising providing a reaction mixture at a pH of 4 to 9, at an effective temperature and for an effective time to produce the composition, the reaction mixture comprised of reactive sources of aluminum and silicon, a cation salt, a fluoride source and water, the reaction mixture expressed in terms of molar ratios by the formula
- aR:ySiO.sub.2 :zAl.sub.2 O.sub.3 :wF.sup.- :bH.sub.2 O
- where R is at least one cation salt, a is the moles of R and is chosen such that the ratio of a:y varies from about 1 to about 20, y is the moles of SiO.sub.2 and varies from about 6.6 to about 7.8, z is the moles of Al.sub.2 O.sub.3 and varies from about 2.1 to about 2.7, w is the moles of fluoride and is chosen such that the ratio of Si:F is greater than 0.4 to about 6.0, and b is the moles of water and varies from about 40 to about 500.
Dependencies are inferred from the claim text.