Process for producing a cross-linked bitumen/polymer composition with a reduction in H2S emissions
US9150707B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Dec 17, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/80
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a cross-linked bitumen/polymer composition (PmB) with a reduction in hydrogen sulphide (H2S) emissions including a production unit for the implementation of such a process. The production process includes the following successive steps:(a) preparing a cross-linked bitumen/polymer composition (PmB) in a reactor and,(b) transferring a predetermined quantity of the composition from the reactor to a storage tank and/or directly to a loading station via a distribution line, the composition being maintained at a temperature between 100° C. and 220° C. during the transfer. A reduction in hydrogen sulphide emissions (H2S) is carried out by the in-line injection of an effective quantity of a hydrogen sulphide (H2S) scavenger during the transfer step. The injection is carried out by continuous introduction of the hydrogen sulphide (H2S) scavenger into the distribution line downstream of the reactor and, upstream of the storage tank and the loading station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.