# US 9,040,451 B2 · Process for producing Sn-comprising catalysts

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- Number: US 9,040,451 B2
- Document ID: US9040451B2
- Status: Granted
- Kind: B2
- Application number: 13/679,107
- Filed: 2012-11-16
- Published: 2013-05-23
- Granted: 2015-05-26
- Earliest claimed: 2011-11-17
- Assignees: BASF SE
- Applicants: BASF SE
- Inventors: Thomas Heidemann; Petr Kubanek; Joana Coelho Tsou; Heiko Baas
- Web page: https://patentgrep.com/patent/US9040451B2

## CPC

- B01J 23/835: with germanium, tin or lead
- B01J 21/04: Alumina
- B01J 23/14: of germanium, tin or lead
- B01J 35/19: {Catalysts containing parts with different compositions}
- B01J 35/613: {10-100 m2/g}
- B01J 35/615: {100-500 m2/g}
- B01J 37/03: Precipitation; Co-precipitation
- B01J 37/031: {Precipitation}
- B01J 37/035: {Precipitation on carriers}
- B01J 37/06: Washing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/086: {Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid}
- B01J 37/12: Oxidising
- B01J 37/16: Reducing
- C07C 213/02: by reactions involving the formation of amino groups from compounds containing hydroxy groups or etherified or esterified hydroxy groups
- C07D 295/00: Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
- B01J 23/78: with alkali- or alkaline earth metals
- B01J 23/83: with rare earths or actinides
- B01J 23/847: Vanadium, niobium or tantalum {or polonium}
- B01J 23/888: Tungsten
- B01J 23/8892: {Manganese}
- B01J 33/00: Protection of catalysts, e.g. by coating
- B01J 37/0203: {the impregnation liquid containing organic compounds}
- B01J 37/18: with gases containing free hydrogen
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- Y02P 20/582: Recycling of unreacted starting or intermediate materials
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to a process for producing a supported tin-comprising catalyst, wherein a solution (S) comprising tin nitrate and at least one complexing agent is applied to the support, where the solution (S) does not comprise any solid or has a solids content of not more than 0.5% by weight based on the total amount of dissolved components.

## Claims

### Claim 1

A process for producing a supported tin-comprising catalyst, wherein a solution (S) comprising tin nitrate and at least one complexing agent is applied to the support, where the solution (S) does not comprise any solid or comprises a solids content of not more than 0.5% by weight based on the total amount of dissolved components.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the solution (S) is an aqueous solution.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the solution (S) additionally comprises at least one further metal salt.

### Claim 4 (depends on 3)

The process according to claim 3, wherein the further metal salt is nickel nitrate, cobalt nitrate or copper nitrate.

### Claim 5 (depends on 1)

The process according to claim 1, wherein the support is aluminum oxide.

### Claim 6 (depends on 1)

The process according to claim 1, wherein the complexing agent is selected from among glycolic acid, lactic acid, hydracylic acid, hydroxybutyric acid, hydroxyvaleric acid, malic acid, mandelic acid, citric acid, sugar acids, tartronic acid, tartaric acid, oxalic acid, malonic acid, maleic acid, succinic acid, glutaric acid, adipic acid, glycine, hippuric acid, EDTA, alanine, valine, leucine and isoleucine.

### Claim 7 (depends on 1)

The process according to claim 1, wherein the solution (S) comprises tin nitrate, nickel nitrate, cobalt nitrate, copper nitrate and citric acid.

### Claim 8 (depends on 1)

The process according to claim 1, wherein the solution (S) is produced by
i) dissolving tin in nitric acid at a temperature of not more than 5° C. and subsequently adding at least one complexing agent, or
ii) dissolving at least one complexing agent in nitric acid at a temperature of from 0° C. to 50° C. and subsequently adding tin.

### Claim 9 (depends on 1)

The process according to claim 1, wherein the tin nitrate, at least one complexing agent and optionally at least one further metal salt are precipitated from the solution (S) onto the support by addition of at least one base (B).

### Claim 10 (depends on 9)

The process according to claim 9, wherein the base (B) is selected from among sodium carbonate, sodium hydroxide, potassium carbonate, potassium hydroxide and bases which are free of alkali metals.

### Claim 11 (depends on 10)

The process according to claim 10, wherein the bases which are free of alkali metals are ammonia, ammonium carbonate, ammonium hydrogencarbonate, ammonium carbamate, ammonium oxalate, ammonium malonate, urotropin or urea.

### Claim 12 (depends on 10)

The process according to claim 10, wherein the base is sodium carbonate.

### Claim 13 (depends on 1)

The process according to claim 1, wherein application of the solution (S) to the support is followed by at least one further step selected from among a drying step, a calcination step, a conditioning step, a shaping step, a reduction step and a passivation step.

### Claim 14 (depends on 13)

The process according to claim 13, wherein the complexing agent is removed from the supported tin-comprising catalyst during or after the calcination step.