Hydrocarbon conversion process using a high throughput process for manufacturing molecular sieves

摘要

A method of crystallizing a crystalline molecular sieve having a pore size in the range of from about 2 to about 19 Å, said method comprising the steps of (a) providing a mixture comprising at least one source of ions of tetravalent element (Y), at least one hydroxide source (OH), and water, said mixture having a solid-content in the range of from about 15 wt. % to about 50 wt. %; 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.

主权项

1. A process for converting hydrocarbons comprising the step of contacting said hydrocarbons under conversion conditions with a crystalline molecular sieve, said crystalline molecular sieve composition having a pore size in the range of from about 2 to about 19 Å and 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−), at least one structure —directing agent, and water, said mixture having a solid-content in the range of from about 15% to about 50%, 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 as follows:solid⁢-⁢content=said⁢⁢weight⁢⁢of⁢⁢said⁢⁢oxidesin⁢⁢said⁢⁢mixture×100⁢%said⁢⁢weight⁢⁢of⁢⁢said⁢⁢oxides⁢⁢in⁢⁢said⁢⁢mixture; and (b) treating said mixture with stirring at crystallization conditions sufficient to obtain a weight hourly throughput from about 0.005 to about 1 hr−1, and a weight hourly template efficiency of at least about 0.05 hr−1 to form said crystalline molecular sieve, 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 comprising at least one of ABW, AEI, AEL, AET, AFI, AFO, CHA, EMT, FAU, FER, LEV, LTA, LTL, MAZ, MEL, MTT, NES, OFF, TON, VFI, MWW, MTW, MOR, EUO, *BEA, and MFS, wherein said weight hourly template efficiency is calculated by dividing the weight of said molecular sieve produced in a dried cake with the weight of said directing agent used in said mixture and the total said crystallization time required for the crystallization as follows:weight⁢⁢hourlytemplate⁢⁢efficiency=weight⁢⁢of⁢⁢said⁢⁢oxide⁢⁢oftetravalent⁢⁢element⁢⁢(YO2)×tetravalent⁢⁢element⁢⁢oxide⁢⁢utilization(weight⁢⁢of⁢⁢said⁢⁢directing⁢⁢agent)×(crystallization⁢⁢time), and said tetravalent element oxide utilization is 0.85.