Catalyst for gasoline synthesis from dimethyl ether, method for preparing the same, and method for preparing gasoline using the same

Patent metadata

Field	Value
Publication number	US-11648539-B2
Application number	US-202117465482-A
Country	US
Kind code	B2
Filing date	Sep 2, 2021
Priority date	Apr 29, 2021
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

Disclosed is a method for preparing a catalyst for a gasoline reaction of dimethyl ether that includes reacting a silica source, an aluminum source, and a structural derivative to synthesize a zeolite sol, mixing an alcohol with an organic template to form an emulsion phase, and adding a zeolite sol to the emulsion phase to perform a reaction.

First claim

What is claimed is:

1. A method for preparing a catalyst comprising a zeolite for a gasoline reaction of dimethyl ether, comprising:
reacting a silica source, an aluminum source, and a structural derivative to synthesize a zeolite sol;
mixing an alcohol with an organic template to form an emulsion phase; and
adding a zeolite sol to the emulsion phase to perform a zeolite synthesis reaction to synthesize a zeolite;
wherein the structural derivative is a nitrogen-containing heterocyclic compound including pyrrolidine, piperidine, or a combination thereof;
wherein the organic template comprises cetrimonium bromide (CTAB), sodium dodecyl sulfate, ammonium lauryl sulfate, or a combination thereof; and
wherein the zeolite comprises a ferrierite (FER) structure and a ZSM-5 structure.

2. The method of claim 1 , wherein the alcohol comprises ethanol, propanol, butanol, heptanol, or a combination thereof.

3. The method of claim 1 , wherein the emulsion phase is formed by mixing about 5 parts by weight to about 15 parts by weight of alcohol based on 1 part by weight of the organic template.

4. The method of claim 1 , wherein the zeolite sol is added dropwise to the emulsion phase.

5. The method of claim 1 , wherein the zeolite synthesis reaction is performed at about 140° C. to about 160° C. for about 48 hours to about 336 hours.

6. The method of claim 5 , which further comprises exchanging an Na-form zeolite produced in the zeolite synthesis reaction with a cation to prepare an NH 3 -form zeolite.

7. The method of claim 6 , which further comprises converting the NH 3 -form zeolite into H-form zeolite at about 450° C. to about 650° C. for about 3 hours to about 6 hours.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Research & Business Found Sungkyunkwan Univ
• Res & Business Foudation Sungkyunkwan Uni

Inventors

• Hong Chae Hwan
• Choung Jin Woo
• Hur Young Gul
• Bae Jong Wook
• Kim Jong Jin

Classifications

• C10G3/42

  Catalytic treatment · CPC title

• B01J29/40 Primary

  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

• C01B39/02

  Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof · CPC title

• C01B39/38

  Type ZSM-5 · CPC title

• C01B39/04

  using at least one organic template directing agent, e.g. an ionic quaternary ammonium compound or an aminated compound · CPC title