Patents by Inventor Martijn A. Van Koten

Martijn A. Van Koten has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for preparing a large molecular sieve
    Patent number: 5593655
    Abstract: The present invention relates to a process for the preparation of a large-pore molecular sieve, comprising crystallizing the molecular sieve from a starting mixture at a pH in the range of from 3 to 8, and recovering a large-pore molecular sieve, the said starting mixture having a molar composition satisfying the following molar ratio's:(0.01-2)R.sub.2/n O):(0-1.5)M.sub.2/m O:(0-0.5)X.sub.2 O.sub.3 :1YO.sub.2 :(5-1000)H.sub.2 O:(0.01-3)F.sup.-,wherein n and m are the weighted average valences of R and M respectively, M is an alkali- or alkaline earth metal, X is a trivalent metal and Y is a tetravalent element, wherein R comprises at least one main organic template R.sub.m having the formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 Q.sup.+ wherein Q is nitrogen or phosphorus and wherein at least one and at most three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is an aryl or alkyl group having 6 to 36 carbon atoms and each of the remainder of R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: January 14, 1997
    Assignee: Shell Oil Company
    Inventors: Hermanus Jongkind, Martijn A. Van Koten, Alain Seive, Willem H. J. Stork