Provided is a method for preparing a structure directing agent (SDA) for crystalline molecular sieve synthesis comprising the steps of (a) hydrolyzing analkyl sulfate counterion of a quaternary ammonium salt to produce an organic ammonium salt having a hydrogen sulfate counterion; and (b) contacting the organic ammonium salt having the hydrogen sulfate counterion with a source of hydroxide in solution to form an organic ammonium salt having a hydroxide counterion; wherein the organic ammonium salt is a structure directing agent (SDA) for crystalline molecular sieve synthesis.
Unsaturated Amines. X. The Mercuric Acetate Route to Substituted Piperidines, Δ<sup>2</sup>-Tetrahydropyridines and Δ<sup>2</sup>-Tetrahydroanabasines
作者:Nelson J. Leonard、Fred P. Hauck
DOI:10.1021/ja01576a056
日期:1957.10
[EN] METHOD FOR PREPARING STRUCTURED DIRECTING AGENT<br/>[FR] PROCÉDÉ DE PRÉPARATION D'AGENT DIRECTEUR DE STRUCTURE
申请人:JOHNSON MATTHEY PLC
公开号:WO2016172128A1
公开(公告)日:2016-10-27
Provided is a method for preparing a structure directing agent (SDA) for crystalline molecular sieve synthesis comprising the steps of (a) hydrolyzing analkyl sulfate counterion of a quaternary ammonium salt to produce an organic ammonium salt having a hydrogen sulfate counterion; and (b) contacting the organic ammonium salt having the hydrogen sulfate counterion with a source of hydroxide in solution to form an organic ammonium salt having a hydroxide counterion; wherein the organic ammonium salt is a structure directing agent (SDA) for crystalline molecular sieve synthesis.
Evidence for extensive recombination of the ring-opened to the original cyclic molecular ions of 2-substituted piperidines and pyrrolidines after electron impact
作者:Uwe I. Záhorszky
DOI:10.1039/p29830001655
日期:——
of (M– alkyl)+ ions by α-fission of 2,2-dialkyl-substituted N-ethylpiperidines (2) and -pyrrolidines (3) and the virtual absence of ring degradation products is caused by facile recombination of the ring-opened to the originalcyclicmolecularions. Suppression of ring opening of the initially formed molecularions or conversion of the ring-opened into other isomeric molecularions as explanations