Title:
METHOD FOR PRODUCING FINE ZEOLITE
Document Type and Number:
WIPO Patent Application WO/2017/039013
Kind Code:
A1
Abstract:
This method for producing a fine zeolite, comprises: a pulverization step for pulverizing raw material zeolite that has an average particle size of at least 0.5 µm and that is represented by general formula M2O·xSiO2·Al2O3 (in the formula, M represents an alkali metal, H+, or NH4
+, and x is 2-6); and a recrystallization step for causing the pulverized zeolite to recrystallize in an alkaline solution at temperatures of 15-45°C so as to obtain a zeolite that has an average particle size of at most 0.3 µm, and in which the ratio (B/A) of a post-recrystallization crystallinity (B) with respect to a pre-recrystallization crystallinity (A) is 1.2 or higher. According to this method, it is possible to reduce the energy cost for heating required for the recrystallization as compared with conventional techniques, and also produce fine zeolite particles having favorable crystallinity similarly to conventional products but at a lower cost than conventional techniques.
Inventors:
WAKIHARA TORU (JP)
INOUE MAKOTO (JP)
INOUE MAKOTO (JP)
Application Number:
PCT/JP2016/076005
Publication Date:
March 09, 2017
Filing Date:
September 05, 2016
Export Citation:
Assignee:
NAKAMURA CHOKO CO LTD (JP)
International Classes:
C01B39/46; C01B39/02
Foreign References:
| JP2012240867A | 2012-12-10 |
Other References:
WAKIHARA TORU ET AL.: "Fabrication of Fine Zeolite with Improved Catalytic Properties by Bead Milling and Alkali Treatment", ACS APPLIED MATERIALS & INTERFACES, vol. 2, no. 10, 27 October 2010 (2010-10-27), pages 2715 - 2718, XP055365822
WAKIHARA TORU ET AL.: "Top-down Tuning of Nanosized Zeolites by Bead-milling and Recrystallization", JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, vol. 56, no. 4, pages 206 - 213
WAKIHARA TORU ET AL.: "Top-Down Tuning of Nanosized ZSM-5 Zeolite Catalyst by Bead Milling and Recrystallization", CRYSTAL GROWTH & DESIGN, vol. 11, no. issue.11, 2 November 2011 (2011-11-02), pages 5153 - 5158, XP055365825
WAKIHARA TORU ET AL.: "Top-down Tuning of Nanosized Zeolites by Bead-milling and Recrystallization", JOURNAL OF THE JAPAN PETROLEUM INSTITUTE, vol. 56, no. 4, pages 206 - 213
WAKIHARA TORU ET AL.: "Top-Down Tuning of Nanosized ZSM-5 Zeolite Catalyst by Bead Milling and Recrystallization", CRYSTAL GROWTH & DESIGN, vol. 11, no. issue.11, 2 November 2011 (2011-11-02), pages 5153 - 5158, XP055365825
Attorney, Agent or Firm:
YANAGINO Takao et al. (JP)
Download PDF: