Patent ID: 8187569

Claim:
A method of making a crystalline molecular sieve of MFS framework type, said method comprising the steps of: (a) providing a mixture comprising at least one source of ions of tetravalent element (Y), at least one source of ions of trivalent element (X), at least one hydroxide source (OH − ), at least one structure-directing-agent (R), at least one seed source (Seed), and water (H 2 O), said mixture having the following mole composition (expressed in term of oxide): YO 2 :( n )X 2 O 3 :( x )OH − :( y )R:( z )H 2 O+( m )Seed wherein m is in the range of from about 10 wtppm to about 2 wt. % (based on total weight of the synthesis mixture), n is in the range of from about 0.005 to 0.05, x is in the range of from about 0.01 to about 0.3, y is in the range of from about 0.03 to about 2; and z is in the range of from about 3 to about 8; and (b) treating said mixture under crystallization conditions to form a product comprising said crystalline molecular sieve of MFS framework type and less than 50 wt. % of non-MFS material, based on the combination weight of non-MFS materials and the molecular sieve(s) of MFS framework type, wherein said structure-directing-agent R comprises N,N,N,N′,N′,N′-hexaethylpentane diammonium salt (R 1 ), said crystallization conditions comprise a temperature in the range of from about 150° C. to about 250° C., and a crystallization time less than 100 hr, and wherein the weight hourly throughput is at least 0.002 hr −1 .