# US 2010/0163801 A1 · Odorant for Hydrogen Based on Acrylate and Methyl Salicylate

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- Number: US 2010/0163801 A1
- Document ID: US20100163801A1
- Status: Published application
- Kind: A1
- Application number: 11/720,879
- Filed: 2005-12-19
- Published: 2010-07-01
- Earliest claimed: 2004-12-22
- Assignees: Symrise AG
- Inventors: Norbert Braun; Jörg Eilers; Dirk Müller
- Web page: https://patentgrep.com/patent/US20100163801A1

## CPC

- C10L 3/006: {detectable by the senses}
- 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

## Abstract

The present invention concerns a nitrogen-free and sulfur-free odorant for hydrogen gas containing at least one acrylic acid CrC6-alkyl ester and methyl salicylate, its use for the odorisation of hydrogen gas, a process for the odorisation of hydrogen gas and hydrogen gas containing an odorant according to the invention.

## Claims

### Claim 1

Nitrogen-free and sulfur-free odorant for hydrogen gas, consisting of or containing
A) one or more acrylic acid C1-C6-alkyl esters;
B) methyl salicylate;
C) optionally one or more compounds from the group of C3-C4-aldehydes;
D) optionally one or more antioxidants.

### Claim 2 (depends on 1)

Odorant according to claim 1, consisting of or containing
A) two different acrylic acid C1-C4-alkyl esters;
B) methyl salicylate;
C) propionaldehyde and/or n-butyraldehyde;
D) optionally one or more antioxidants.

### Claim 3 (depends on 1)

Odorant according to claim 1, containing or consisting of
A) acrylic acid methyl ester and acrylic acid ethyl ester;
B) methyl salicylate.

### Claim 4 (depends on 1)

Odorant according to claim 1, containing or consisting of
A) acrylic acid methyl ester and acrylic acid ethyl ester;
B) methyl salicylate;
C) propionaldehyde and/or n-butyraldehyde;
D) one or more antioxidants.

### Claim 5 (depends on 1, 2, 3, 4)

Odorant according to one of claims 1 to 4, containing or consisting of:
80 to 97 wt. % of component A) and/or
1 to 15 wt. % of component B) and/or
1 to 10 wt. % of component C) and/or
0.01 to 0.2 wt. % of component D).

### Claim 6 (depends on 1, 2, 3, 4, 5)

Odorant according to at least one of claims 1 to 5, characterised in that the ratio by weight of component B) to component C) is in the range from 3:1 to 1:3.

### Claim 7 (depends on 1, 2, 3, 4, 5, 6)

Use of an odorant according to one of claims 1 to 6 for the odorisation of hydrogen gas.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6)

Odorised hydrogen gas comprising (i) a hydrogen gas having a hydrogen content of at least 98 wt. % and (ii) an odorant as defined in one of claims 1 to 6.

### Claim 9 (depends on 1, 2, 3, 4, 5, 6)

Process for the odorisation of hydrogen gas having a hydrogen content of at least 98 wt. %, characterised in that an odorant as defined in one of claims 1 to 6 is added to the hydrogen gas.

### Claim 10 (depends on 9)

Process according to claim 9, characterised in that the odorant is added to the hydrogen in a quantity of 5 to 100 mg per kg of hydrogen.