Dissolution of hexamine in non-aqueous solvent

Patent metadata

Field	Value
Publication number	US-11292971-B2
Application number	US-202016830625-A
Country	US
Kind code	B2
Filing date	Mar 26, 2020
Priority date	Mar 29, 2017
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

The present disclosure generally relates to scavenging hydrogen sulfide. The disclosure pertains to non-aqueous and non-volatile compositions that include a monolignol alcohol and hydrogen sulfide scavenging compound. The hydrogen sulfide scavenging compound may be hexamine in some aspects. The compositions may also include a C2-8 polyol. The compositions disclosed are stable and can be used, for example, in removing hydrogen sulfide from hot asphalt.

First claim

What is claimed is:

1. A composition, comprising: a monolignol alcohol and a compound of formula (I) or formula (II)

where R 1 is a substituted or unsubstituted C 1-8 alkyl, a substituted or unsubstituted C 2-8 alkenyl, or a substituted or unsubstituted C 2-8 alkynyl, wherein the substituted C 1-8 alkyl, the substituted C 2-8 alkenyl, and the substituted C 2-8 alkynyl are substituted with hydroxyl or C 1-5 alkyl.

2. The composition of claim 1 , wherein the monolignol alcohol is selected from the group consisting of p-coumaryl alcohol, coniferyl alcohol, sinapyl alcohol, cinnamyl alcohol, and any combination thereof.

3. The composition of claim 1 , wherein the monolignol alcohol is cinnamyl alcohol.

4. The composition of claim 1 , wherein the monolignol alcohol is coniferyl alcohol.

5. The composition of claim 1 , wherein the compound is hexamine.

6. The composition of claim 1 , further comprising a C 2-8 polyol.

7. The composition of claim 6 , wherein the C 2-8 polyol is glycerin.

8. The composition of claim 1 , comprising the compound of formula (I), cinnamyl alcohol, and glycerin.

9. The composition of claim 1 , wherein the composition comprises about 2 to about 20 weight percent of the compound of formula (I) or formula (II).

10. The composition of claim 1 , wherein the composition comprises about 10 to about 98 weight percent of the monolignol alcohol.

11. The composition of claim 6 , wherein the composition comprises about 2 to about 80 weight percent of the C 2-8 polyol.

12. The composition of claim 6 , wherein a weight ratio of the monolignol alcohol to the C 2-8 polyol is about 10:1 to about 20:1.

13. The composition of claim 1 , wherein a weight ratio of the compound of formula (I) or formula (II) to monolignol alcohol is about 1:15 to about 1:1.

14. The composition of claim 1 , wherein the composition comprises an amount of water that is less than about 1% by weight.

15. The composition of claim 1 , wherein the composition excludes water.

16. The composition of claim 1 , wherein the composition comprises a pH greater than about 7.

Assignees

• Ecolab Usa Inc

Inventors

• Solomon Kim R

Classifications

• C04B2111/00017

  Aspects relating to the protection of the environment · CPC title

• C10G29/22 Primary

  containing oxygen as the only hetero atom · CPC title

• C10G2300/207

  Acid gases, e.g. H2S, COS, SO2, HCN · CPC title

• C04B41/5315

  Cleaning compositions, e.g. for removing hardened cement from ceramic tiles · CPC title

• C08L95/00

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title