Method providing for a low release of H2S during the preparation of sulfur-extended asphalt
US8361216B2 · kind B2 · utility
1Cited by
12References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 30, 2010 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Jul 28, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2555/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of making a sulfur-extended asphalt mixture with a minimum of hydrogen sulfide gas release into the atmosphere by using sulfur granules with specific physical properties and which are made by successively coating a starting sulfur seed particle with liquid sulfur that is solidified between coatings to thereby build up the a sulfur particle of a desired size. The sulfur granules are used to in the preparation of a sulfur, bitumen and aggregate mixture to provide the sulfur-extended asphalt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.