公开(公告)号：US4073867A

公开(公告)日：1978-02-14

申请号：US671950

申请日：1976-03-30

申请人： Wolfgang Roebke ,  Dieter Kneitel ,  Erfried Parr

发明人： Wolfgang Roebke ,  Dieter Kneitel ,  Erfried Parr

IPC分类号： B01J20/18 ,  C01B39/16 ,  C01B39/44 ,  C04B28/08 ,  C11D3/00 ,  C11D3/12 ,  C01B33/28

CPC分类号： C11D3/128 ,  C01B33/2815 ,  Y10S423/24

摘要： A crystalline zeolitic molecular sieve of Type A with the composition 1.0 .+-. 0.2 M.sub.2/n O : Al.sub.2 O.sub.3 : 1.85 .+-. 0.5 SiO.sub.2 . y H.sub.2 O where M is a metal cation, n its valence and y has a value up to 6 is prepared having particles with at least 99.5 weight % below 30.mu. diameter, as well as at least 90 weight % under 10.mu. and with 50 weight % below 6.5.mu. by hydrothermal crystallization of an alkali-aluminate silicate by pouring together an aqueous alkali silicate solution and a slightly concentrated aqueous alkali aluminate liquor, in a given case with simultaneous stirring in a receiver, allowing the synthesis premixture to solidify to a gel, adding to this gel a more highly concentrated aqueous alkali aluminate liquor at a temperature between 10.degree. and 100.degree. C. while stirring, allowing the thus obtained synthesis mixture to crystallize at a temperature between 20.degree. and 175.degree. C., preferably 100.degree. C., within 15 minutes and in a given case including a tempering step.

摘要翻译： A型结晶沸石分子筛，组成为1.0 +/- 0.2M2 / nO:Al2O3：1.85 +/- 0.5SiO 2。 y H 2 O，其中M是金属阳离子，其价态和y具有高达6的值，其制备具有至少99.5重量％至少低于30μm直径的颗粒，以及至​​少90重量％的10微米和50重量％ 通过将碱金属硅酸盐水溶液和略微浓缩的碱性铝酸钠液体倾倒在一起，在特定情况下在接收器中同时搅拌的同时将碱金属铝酸盐水溶液水热结晶，使其低于6.5微米，使合成预混物凝固成凝胶 在搅拌的同时，在10〜100℃的温度下向该凝胶中加入更高浓度的碱式铝酸碱液，使得得到的合成混合物在20〜175℃，优选为100℃的温度下结晶。 C.在15分钟内，在给定的情况下，包括回火步骤。