# US 9,518,238 B2 · Transesterification catalyst and method for producing biodiesel fuel using transesterification catalyst

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- Number: US 9,518,238 B2
- Document ID: US9518238B2
- Status: Granted
- Kind: B2
- Application number: 14/763,534
- Filed: 2013-07-26
- Published: 2015-12-17
- Granted: 2016-12-13
- Earliest claimed: 2013-01-28
- Assignees: National Institute of Advanced Industrial Science and Technology
- Applicants: National Institute of Advanced Industrial Science and Technology
- Inventors: Shih-Yuan Chen; Makoto Toba; Yuji Yoshimura; Takehisa Mochizuki
- Web page: https://patentgrep.com/patent/US9518238B2

## CPC

- C10L 1/026: {for compression ignition}
- B01J 21/063: {Titanium; Oxides or hydroxides thereof}
- B01J 21/08: Silica
- B01J 29/89: Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium {(B01J29/005 takes precedence)}
- B01J 35/60: characterised by their surface properties or porosity
- B01J 35/617: {500-1000 m2/g}
- B01J 35/635: {0.5-1.0 ml/g}
- B01J 35/647: {2-50 nm}
- B01J 37/0018: {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)}
- C01B 37/005: {Silicates, i.e. so-called metallosilicalites or metallozeosilites}
- C07C 67/02: by interreacting ester groups, i.e. transesterification
- C07C 67/03: by reacting an ester group with a hydroxy group
- C10L 1/1881: {carboxylic group attached to an aliphatic carbon atom}
- B01J 2235/00: Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J 2235/15: X-ray diffraction
- C10L 2200/0476: Biodiesel, i.e. defined lower alkyl esters of fatty acids first generation biodiesel
- C10L 2270/026: for diesel engines, e.g. automobiles, stationary, marine
- Y02E 50/10: Biofuels, e.g. bio-diesel
- Y02P 20/50: Improvements relating to the production of bulk chemicals
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

To provide a catalyst for production of a biodiesel fuel, which is capable of producing a biodiesel fuel with high selectivity, at a high yield, and at a low cost even in the presence of a water content and a free fatty acid, and a biodiesel fuel production method using the catalyst. Use of a titanium-containing mesoporous silica containing Ti and Si as skeleton constituent elements and having a pore diameter of 5 nm or greater as a transesterification catalyst enables a biodiesel fuel to be produced with high selectivity at a high yield through transesterification between an oil and an alcohol.

## Claims

### Claim 1

A biodiesel fuel production method, comprising:
obtaining a fatty acid alkyl ester through a transesterification reaction between an oil and an alcohol in the presence of a transesterification catalyst that comprises a titanium-containing mesoporous silica,
wherein the titanium-containing mesoporous silica is SBA-15 and has a pore diameter of from 6.5 nm to 8 nm;
wherein a raw material oil of the biodiesel fuel comprises 1% to 10% of water and fatty acid relative to a total amount of oil in the raw material oil; and
wherein the biodiesel fuel production method does not comprise a step of removing a water content and a free fatty acid during transesterification; and
wherein the mesoporous silica has a Ti/Si molar ratio of from 0.03 to 0.07.

### Claim 2 (depends on 1)

The biodiesel fuel production method according to claim 1,
wherein the mesoporous silica has a Ti/Si molar ratio of from 0.03 to 0.05.

### Claim 3

A biodiesel fuel production method, comprising:
obtaining a fatty acid alkyl ester through a transesterification reaction between an oil and an alcohol in the presence of a transesterification catalyst that comprises a titanium-containing mesoporous silica,
wherein the titanium-containing mesoporous silica comprises Ti and Si as skeleton constituent elements, has a mesostructured cellular form (MCF), and has a pore diameter of 5 nm or greater;
wherein a raw material oil of the biodiesel fuel comprises 1% to 10% of water and fatty acid relative to a total amount of oil in the raw material oil;
wherein the biodiesel fuel production method does not comprise a step of removing a water content and a free fatty acid during transesterification; and
wherein the catalyst has pore diameter of from 15 nm to 40 nm.

### Claim 4 (depends on 3)

The biodiesel fuel production method according to claim 3, wherein the mesoporous silica has a Ti/Si molar ratio of from 0.03 to 0.07.

### Claim 5 (depends on 1)

The biodiesel fuel production method according to claim 1, wherein the mesoporous silica has an amorphous structure.

### Claim 6 (depends on 3)

The biodiesel fuel production method according to claim 3, wherein the mesoporous silica has an amorphous structure.