Odorant for hydrogen based on acrylate and acetophenone
View Patent ↗The present invention concerns a nitrogen-free and sulfur-free odorant for hydrogen gas containing at least one acrylic acid C 1 -C 6 -alkyl ester and acetophenone, its use for the odorization of hydrogen gas, a process for the odorization of hydrogen gas and hydrogen gas containing an odorant according to the invention.
1. A nitrogen-free, selenium-free and sulfur-free odorant for hydrogen gas, comprising
A) one or more acrylic acid C 1 -C 6 -alkyl esters;
B) acetophenone;
C) optionally one or more compounds from the group of C 3 -C 4 -aldehydes;
D) optionally one or more antioxidants.
2. An odorant according to claim 1 , further comprising
A) two different acrylic acid C 1 -C 4 -alkyl esters;
B) acetophenone;
C) propionaldehyde and/or n-butyraldehyde;
D) optionally one or more antioxidants.
3. An odorant according to claim 1 , further comprising
A) acrylic acid methyl ester and acrylic acid ethyl ester;
B) acetophenone.
4. An odorant according to claim 1 , further comprising
A) acrylic acid methyl ester and acrylic acid ethyl ester;
B) acetophenone;
C) propionaldehyde and/or n-butyraldehyde;
D) one or more antioxidants.
5. An odorant according to claim 1 , further comprising:
i) 80 to 97 wt. % of component A) and/or
ii) 1 to 15 wt. % of component B) and/or
iii) 1 to 10 wt. % of component C) and/or
iv) 0.01 to 0.2 wt. % of component D).
6. An odorant according to claim 1 , wherein the ratio by weight of component B) to component C) is in the range from 3:1 to 1:3.
7. A method for the odorisation of hydrogen gas comprising, adding an odorant according to claim 1 to hydrogen gas.
8. An odorised hydrogen gas comprising (i) a hydrogen gas having a hydrogen content of at least 98 wt. % and (ii) an odorant comprising an effective amount of
A) one or more acrylic acid C 1 -C 6 -alkyl esters;
B) acetophenone;
C) optionally one or more compounds from the group of C 3 -C 4 -aldehydes;
D) optionally one or more antioxidants.
9. A process for the odorisation of hydrogen gas having a hydrogen content of at least 98 wt. %, comprising adding an effective amount of an odorant to the hydrogen gas wherein the odorant comprises
A) one or more acrylic acid C 1 -C 6 -alkyl esters;
B) acetophenone;
C) optionally one or more compounds from the group of C 3 -C 4 -aldehydes;
D) optionally one or more antioxidants.
10. A process according to claim 9 , wherein the odorant is added to the hydrogen in a quantity of 5 to 100 mg per kg of hydrogen.