High throughput process for manufacturing molecular sieves of MFI framework type

摘要

A process for converting hydrocarbons comprising the step of contacting said hydrocarbons under conversion conditions with a crystalline molecular sieve having a pore size in the range of from about 2 to about 19 Å, said molecular sieve made by a method comprising the steps of (a) providing a mixture comprising at least one source of ions of tetravalent element (Y), at least one trivalent element hydroxide source (OH−), and water, said mixture having a solid-content in the range of from about 15 wt. % to about 50 wt. %. %, preferably of from about 20% to about 30%; and (b) treating said mixture to form the desired crystalline molecular sieve with stirring at crystallization conditions sufficient to obtain a weight hourly throughput from about 0.005 to about 1 hr−1, wherein said crystallization conditions comprise a temperature in the range of from about 200° C. to about 500° C. and a crystallization time less than 100 hr, wherein said crystalline molecular sieve has a zeolite framework type of MFI.

主权项

1. A process for converting hydrocarbons comprising the step of contacting said hydrocarbons under conversion conditions with a crystalline molecular sieve having a pore size in the range of from about 2 to about 19 Å, said molecular sieve made by a method comprising the steps of:
(a) providing a mixture comprising at least one source of ions of tetravalent element (Y), at least one trivalent element hydroxide source (OH−), and water, said mixture having a solid-content in the range of from about 20% to about 30%, wherein said solid-content is measured as the weight of said tetravalent element and said weight of said trivalent element expressed in terms of their oxides divided by the weight of said water in said mixture as a percentage:solid⁢-⁢content=said⁢⁢weight⁢⁢of⁢⁢said⁢⁢oxides⁢⁢in⁢⁢said⁢⁢mixture×100⁢%said⁢⁢weight⁢⁢of⁢⁢said⁢⁢water⁢⁢in⁢⁢said⁢⁢mixture;  and (b) treating said mixture to form said crystalline molecular sieve with stirring at crystallization conditions sufficient to obtain a weight hourly throughput from about 0.005 to about 1 hr−1, wherein said crystallization conditions comprise a temperature in the range of from about 200° C. to about 500° C. and a crystallization time less than 100 hr, wherein said crystalline molecular sieve has a zeolite framework type of MFI.