Nitrile solvents
AssigneeAscend Performance Materials Operations LLC
InventorsTanhee Galindo, Zheng Chai, Jefferson Thomas Ebert, Benjamin Haseltine
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Abstract
A method of removing from a surface a solid sulfur-containing impurity composition comprising a sulfur-containing compound, the method comprising the step of dissolving sulfur-containing compound in the sulfur-containing impurity composition with a nitrile compound to form a treated sulfur-containing impurity composition comprising less than 99.5 wt % sulfur-containing compound, based on the total weight of the treated sulfur-containing impurity composition.
Claims17
A method of removing from a surface a solid sulfur-containing impurity composition comprising a sulfur-containing compound, the method comprising
- dissolving sulfur-containing compound in the sulfur-containing impurity composition with a dissolver solution comprising a nitrile compound having a chemical formula CxH2x−1(CN)3, wherein x is from 4 to 10;
- and a hydrogen sulfide scavenger to form a treated sulfur-containing impurity composition comprising less than 99.5 wt % sulfur-containing compound, based on the total weight of the treated sulfur-containing impurity composition.
A dissolver solution comprising:
- a nitrile compound having a chemical formula CxH2x−1(CN)3, wherein x is from 4 to 10;
- and
- a hydrogen sulfide scavenger.
A method of treating a solid sulfur-containing impurity composition comprising a sulfur-containing compound, the method comprising contacting the sulfur-containing compound in the sulfur-containing impurity composition with a dissolver solution comprising a nitrile compound having a chemical formula CxH2x−1(CN)3, wherein x is from 4 to 10;
- and a hydrogen sulfide scavenger to form a treated sulfur-containing impurity composition comprising less than 99.5 wt % sulfur-containing compound.
A process for inhibiting the formation of polymeric sulfur-containing compounds in a sulfur-containing impurity composition comprising a sulfur-containing compound, the process comprising:
- adding a a dissolver solution comprising nitrile compound having a chemical formula CxH2x−1(CN)3, wherein x is from 4 to 10;
- and a hydrogen sulfide scavenger to the sulfur-containing impurity composition, wherein at least some of the monomeric sulfur-containing compound in the sulfur-containing impurity composition is dissolved, to form a treated sulfur-containing impurity composition comprising a reduced amount of monomeric sulfur-containing compound;
- wherein the treated sulfur-containing impurity composition comprises less than 90 wt % polymeric sulfur-containing compound.
Dependencies are inferred from the claim text.