Method for the dissolution of amorphous dithiazines
US12129437B2 · kind B2 · utility
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12References
20Claims
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Key dates
| Filing date | Oct 5, 2021 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | May 13, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L2290/545
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to the dissolution of amorphous dithiazine (a-DTZ) or polythioformaldehyde or other polymeric by-products of the treatment of hydrocarbon products (a-DZT) to remove them from surfaces. These are solids that build up on surfaces of processing plant and are resistant to most chemical treatment. The treatment requires treating the surface with an effective amount of a mercaptan or an amine. Surfactants to keep the dissolved a-DTZ or other components from redepositing elsewhere are also described, as is the use of hydrogen sulfide to add in removal by mercaptans.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.