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Silicate-coated MFI-type zeolite, method of producing the same, and method of producing p-xylene using the same
US9687827B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9687827-B2 |
| Application number | US-201314389553-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 29, 2013 |
| Priority date | Mar 30, 2012 |
| Publication date | Jun 27, 2017 |
| Grant date | Jun 27, 2017 |
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Abstract
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A silicate-coated MFI-type zeolite is obtained by coating an MFI-type zeolite with a silicate, and a peak area ratio b/a of a peak b at 2θ=8.4 to 9.7° to a peak a at 2θ=7.0 to 8.4° in an X-ray diffraction spectrum is 1 or more, and a pKa value measured by a Hammett indicator is +3.3 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of producing a silicate-coated MFI-type zeolite comprising: synthesizing hydrothermally using a silica source, an aluminum source, a structure directing agent, and a fluorine source to obtain an MFI-type zeolite having a peak area ratio b′/a′ of a peak b′ at 2θ=8.4 to 9.7° to a peak a′ at 2θ=7.0 to 8.4° in an X-ray diffraction spectrum of 1 or more; and coating the MFI-type zeolite with a silicate by synthesizing hydrothermally using a silica source and a structure directing agent and without using a fluorine source to obtain the silicate-coated MFI-type zeolite, wherein a peak area ratio b/a of a peak b at 2θ=8.4 to 9.7° to a peak a at 2θ=7.0 to 8.4° in an X-ray diffraction spectrum of the silicate-coated MFI-type zeolite is 1 or more and a pKa value measured by a Hammett indicator is +3.3 or more. 2. The method of producing the silicate-coated MFI-type zeolite according to claim 1 , further comprising removing aluminum in sites other than a skeleton of the MFI-type zeolite. 3. The method of producing the silicate-coated MFI-type zeolite according to claim 1 , further comprising: before the coating the MFI-type zeolite with the silicate, subjecting the MFI-type zeolite to an ion-exchange treatment to obtain the MFI-type zeolite having an amount of aluminum in sites other than a skeleton of the MFI-type zeolite of 10% or less.
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Classifications
Nuclear magnetic resonance [NMR] · CPC title
Compounds characterised by their crystallite size · CPC title
characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title
Mixtures of molecular sieves comprising at least one molecular sieve which is not an aluminosilicate zeolite, e.g. from groups B01J29/03 - B01J29/049 or B01J29/82 - B01J29/89 · CPC title
- B01J29/40Primary
of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively · CPC title
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- What does patent US9687827B2 cover?
- A silicate-coated MFI-type zeolite is obtained by coating an MFI-type zeolite with a silicate, and a peak area ratio b/a of a peak b at 2θ=8.4 to 9.7° to a peak a at 2θ=7.0 to 8.4° in an X-ray diffraction spectrum is 1 or more, and a pKa value measured by a Hammett indicator is +3.3 or more.
- Who is the assignee on this patent?
- Jx Nippon Oil & Energy Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J29/40. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 27 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).