# US 2014/0155256 A1 · Raw Materials for Vanadium-Free or Vanadium-Reduced Denox Catalysts, and Method for Producing Same

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- Number: US 2014/0155256 A1
- Document ID: US20140155256A1
- Status: Published application
- Kind: A1
- Application number: 14/116,365
- Filed: 2012-03-30
- Published: 2014-06-05
- Earliest claimed: 2011-05-11
- Assignees: Sachtleben Pigment GmbH
- Inventors: Ralf Becker; Gerhard Auer; Frank Hipler; Nicole Galbarczyk; Kai-Sven Lange; Horst Günnel; Uwe Dörschug
- Web page: https://patentgrep.com/patent/US20140155256A1

## CPC

- B01J 23/888: Tungsten
- B01D 53/9418: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
- B01J 21/063: {Titanium; Oxides or hydroxides thereof}
- B01J 35/45: Nanoparticles
- B01J 35/615: {100-500 m2/g}
- B01J 37/0009: {Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst}
- B01J 37/0201: {Impregnation}
- B01J 37/033: {Using Hydrolysis}
- B01D 2251/2062: Ammonia
- B01D 2251/2067: Urea
- B01D 2255/2065: Cerium
- B01D 2255/20707: Titanium
- B01D 2255/20738: Iron
- B01D 2255/20776: Tungsten
- B01D 2255/9207: Specific surface
- B01D 2258/01: Engine exhaust gases
- B01D 2258/0291: from waste incineration plants
- B01J 21/16: Clays or other mineral silicates
- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 35/56: Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
- B01J 37/0045: {Drying a slurry, e.g. spray drying}
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A composition that comprises a titanium compound, an iron compound, and a tungsten compound, wherein the titanium compound has a microcrystalline anatase structure and/or is obtained in the production of TiO2 according to the sulphate process, during hydrolysis of a solution which contains titanyl sulphate, and also in that the composition has a vanadium content, calculated as V, of less than 0.15 wt. % in relation to the solids content of the composition. A catalyst or catalyst raw material containing the claimed composition, as well as to a dimensionally stable and catalytically active solid body can be obtained by mixing the composition defined above with binders, plasticisers and optionally, further additives, molding the obtained composition preferably by extrusion, and subsequently carrying out calcination, or by providing a dimensionally stable and catalytically active solid body that can be obtained by applying the composition, optionally together with binders, plasticisers and further additives, to a substrate, and subsequently carrying out calcination.

## Claims

### Claim 1

A composition comprising a titanium compound, an iron compound and a tungsten compound, wherein the titanium compound is obtained in the production of TiO2 according to the sulfate process during hydrolysis of a titanyl sulfate-containing solution and/or has a microcrystalline anatase structure and the composition has a vanadium content, calculated as V, of less than 0.15% by weight based on the solids content of the composition.

### Claim 2 (depends on 1)

The composition as claimed in claim 1, wherein the titanium compound which is obtained in the production of TiO2 according to the sulfate process during hydrolysis of a titanyl sulfate-containing solution and/or has a microcrystalline anatase structure makes up more than 50% by weight of all titanium-containing components of the composition.

### Claim 3 (depends on 1)

The composition as claimed in claim 1, wherein the composition has a BET surface area of greater than 150 m2/g.

### Claim 4 (depends on 1)

The composition as claimed in claim 1, wherein the iron compound is an organic iron compound, and/or the iron content, calculated as Fe2O3, is from 0.1 to 5% by weight, based on the solids content of the composition.

### Claim 5 (depends on 1)

The composition as claimed in claim 1, wherein the tungsten content, calculated as WO3, is from 2 to 30% by weight, based on the solids content of the composition.

### Claim 6 (depends on 1)

The composition as claimed in claim 1, wherein the composition further comprises a cerium compound and has a cerium content, calculated as CeO2, of from 0.01 to 5% by weight, based on the solids content of the composition.

### Claim 7 (depends on 1)

The composition as claimed in claim 1, wherein the composition has a Zr content, calculated as ZrO2, of less than 8% by weight, based on the solids content of the composition.

### Claim 8 (depends on 1)

The composition as claimed in claim 1, wherein the sulfate content of the composition is from 0.05 to 3.5% by weight.

### Claim 9 (depends on 1)

The composition as claimed in claim 1, wherein the ratio of Cl/TiO2 is less than 0.0005.

### Claim 10 (depends on 1)

The composition as claimed in claim 1, wherein it is present in the form of a suspension or paste.

### Claim 11 (depends on 1)

A process for producing a composition as claimed in claim 1, comprising mixing of a titanium compound which is obtained in the production of TiO2 according to the sulfate process during hydrolysis of a titanyl sulfate-containing solution and/or has a microcrystalline anatase structure, an iron compound and a tungsten compound.

### Claim 12 (depends on 11)

The process as claimed in claim 11, wherein a water-soluble iron compound and/or a water-soluble tungsten compound is deposited on the titanium compound.

### Claim 13 (depends on 11)

The process as claimed in claim 11, wherein the composition has not been subjected to any thermal treatment above 300° C. before being processed to form catalysts and a BET surface area of the composition of from 100 to 500 m2/g, is obtained.

### Claim 14

(canceled)

### Claim 15 (depends on 1)

A catalyst or catalyst raw material comprising a composition as claimed in claim 1.

### Claim 16 (depends on 1)

A dimensionally stable, catalytically active solid body obtainable by mixing of the composition as claimed in claim 1 with binders, plasticizers and optionally further additives, shaping of the resulting composition, and subsequent calcination.

### Claim 17 (depends on 4)

The composition as claimed in claim 4, wherein the iron compound is ammonium iron(III) citrate.

### Claim 18 (depends on 16)

The catalytically active solid body as claimed in claim 16, wherein said shaping is by extrusion.

### Claim 19 (depends on 1)

A dimensionally stable, catalytically active solid body obtainable by application of the composition as claimed in claim 1, optionally together with binders, plasticizers and/or further additives, to a support material and subsequent calcination.