Process for preparing a boron containing zeolitic material having MWW framework structure

Patent metadata

Field	Value
Publication number	US-10442697-B2
Application number	US-201816007724-A
Country	US
Kind code	B2
Filing date	Jun 13, 2018
Priority date	Feb 5, 2013
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A process for preparing an aluminum-free boron containing zeolitic material comprising the framework structure MWW (BMWW), comprising (a) hydrothermally synthesizing the BMWW from a synthesis mixture containing water, a silicon source, a boron source, and an MWW template compound obtaining the BMWW in its mother liquor, the mother liquor having a pH above 9; (b) adjusting the pH of the mother liquor, obtained in (a) and containing the BMWW, to a value in the range of from 6 to 9; (c) separating the BMWW from the pH-adjusted mother liquor obtained in (b) by filtration in a filtration device.

First claim

The invention claimed is:

1. An aluminum-free boron containing zeolitic material comprising the framework structure MWW (BMWW), obtained by a process comprising
(a) hydrothermally synthesizing a BMWW precursor from a synthesis mixture containing water, a silicon source, a boron source, and an MWW template compound obtaining the BMWW precursor in its mother liquor, the mother liquor having a pH above 9;
(b) adjusting the pH of the mother liquor, obtained in (a) and containing the BMWW precursor, to a value in the range of from 6 to 9; and
(c) separating the BMWW precursor from the pH-adjusted mother liquor obtained in (b) by filtration in a filtration device,
wherein the BMWW has boron content in the range of from 1.0 to 2.2 weight-%, calculated as elemental boron and based on the total weight of the BMWW, a silicon content of at least 37 weight-%, calculated as elemental silicon and based on the total weight of the BMWW, a degree of crystallinity of at least (80 ±5) %, as determined via XRD, and a BET specific surface area of at least 300 m 2 /g, as determined according to DIN 66131.

2. The BMWW of claim 1 , wherein the BET specific surface area is in the range of from 300 to 500 m 2 /g, as determined according to DIN 66131.

3. A catalyst, a catalyst support, or a catalyst precursor, comprising the aluminum-free boron containing zeolitic material according to claim 1 .

4. The catalyst, catalyst support, or catalyst precursor according to claim 3 , which is suitable as a catalyst precursor for the preparation of a titanium containing zeolitic catalyst.

5. The catalyst, catalyst support, or catalyst precursor according to claim 3 , which is suitable as a catalyst precursor for the preparation of a zinc and titanium containing zeolitic catalyst.

Assignees

• Basf Se

Inventors

• Parvulescu Andrei-Nicolae
• Mueller Ulrich
• Luetzel Hans-Juergen
• Uhl Georg
• Bayer Robert
• Vogelsang Regina
• Schlosser Robert
• Ruslim Franky
• Czajka Pawel

Classifications

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J29/7038

  MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25 · CPC title

• C01P2006/90

  Other properties not specified above · CPC title

• C01B39/48

  using at least one organic template directing agent · CPC title

• B01J37/08

  Heat treatment {(B01J37/0009, B01J37/0018 take precedence)} · CPC title