公开(公告)号：US20170369327A1

公开(公告)日：2017-12-28

申请号：US15615969

申请日：2017-06-21

Applicant: UNIVERSITY OF HOUSTON SYSTEM

Inventor： Jeffrey D. RIMER ,  Miguel MALDONADO ,  Matthew D. OLEKSIAK

IPC: C01B39/02 ,  C01B39/50 ,  C01B39/46 ,  C01B39/52

Abstract: Methods of controlling crystal polymorphism in organic-free synthesis of Na-Zeolites and the zeolite crystals formed using those methods are provided. The methods disclosed herein create certain types of zeolite crystals more efficiently than other previously known methods. The methods also create certain types of zeolite crystals in a form and concentration not previously disclosed. The methods disclosed herein generally comprise using solutions with varying ratios of silicon (Si), aluminum (Al), hydroxide (OH), and water. Some implementations of the invention disclosed include efficient methods of producing nearly pure cancrinite (CAN), methods of obtaining sodalite in solutions with a high Si/Al ratio, and a method of forming thin, platelet-like ANA crystals with a width of less than about 1 μm and a length of at least about 3 μm.

公开(公告)号：US20150360964A1

公开(公告)日：2015-12-17

申请号：US14305097

申请日：2014-06-16

Applicant: UNIVERSITY OF HOUSTON SYSTEM

Inventor： Jeffrey D. RIMER ,  Manjesh KUMAR

IPC: C01B39/54 ,  B01J29/06 ,  B01J35/02 ,  B01J37/04 ,  C30B29/34 ,  B01J29/83 ,  B01J29/85 ,  B01J47/00 ,  C30B7/14 ,  C30B29/14 ,  C01B39/04 ,  B01J37/03

CPC classification number: C01B39/54 ,  B01J29/035 ,  B01J29/06 ,  B01J29/7015 ,  B01J29/85 ,  B01J35/002 ,  B01J35/0033 ,  B01J35/023 ,  B01J47/00 ,  B01J2229/62 ,  C01B39/04 ,  C01P2004/03 ,  C01P2004/20 ,  C01P2004/38 ,  C01P2004/60 ,  C30B7/14 ,  C30B29/14 ,  C30B29/34

Abstract: Embodiments of the invention generally provide compositions of crystalline zeolite materials with tailored crystal habits and the methods for forming such crystalline zeolite materials. The methods for forming the crystalline zeolite materials include binding one or more zeolite growth modifiers (ZGMs) to the surface of a zeolite crystal, which results in the modification of crystal growth rates along different crystallographic directions, leading to the formation of zeolites having a tailored crystal habit. The improved properties enabled by the tailored crystal habit include a minimized crystal thickness, a shortened internal diffusion pathlength, and a greater step density as compared to a zeolite having the native crystal habit prepared by traditional processes. The tailored crystal habit provides the crystalline zeolite materials with an aspect ratio of about 4 or greater and crystal surfaces having a step density of about 25 steps/μm2 or greater.

Abstract translation: 本发明的实施方案通常提供具有定制的晶体习惯的结晶沸石材料的组合物和形成这种结晶沸石材料的方法。 形成结晶沸石材料的方法包括将一种或多种沸石生长改性剂（ZGM）结合到沸石晶体的表面，这导致沿着不同的晶体方向改变晶体生长速率，导致形成具有定制的沸石 水晶习惯 与通过传统方法制备的具有天然结晶习性的沸石相比，通过定制的晶体习性实现的改进的性质包括最小化的晶体厚度，缩短的内部扩散路径长度和更大的阶梯密度。 定制的晶体习性提供了具有约4或更大的纵横比的结晶沸石材料和具有约25步/μm2或更大的阶梯密度的晶体表面。