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US 7,604,788 B2Granted
Process for the conversion of polysulfanes
AssigneeEvonik Degussa GmbH
InventorsAlexander Möller, Wolfgang Böck, Wolfgang Taugner, Harald Heinzel, Stephan Rautenberg
Life of this patent
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Abstract
The invention provides a process for the removal of polysulfanes from gas streams formed during H2S synthesis.
Claims23
A process for obtaining a purified gas by removing polysulfanes from crude gas formed during the production of hydrogen sulfide, comprising:
- a) passing said crude gas through a wash system where said crude gas is brought into contact with a wash solution comprising water or methanol;
- and
- b) collecting said purified gas from the wash solution of step a).
A process for obtaining a purified gas by removing polysulfanes from crude gas formed during the production of hydrogen sulfide, comprising:
- a) passing said crude gas through a wash system comprising an aqueous or methanolic solution containing 0.5-20 wt% of an alkali or alkaline earth hydroxide or oxide;
- and
- b) collecting said purified gas from the aqueous or methanolic solution of step a).
A process for obtaining a purified gas by removing polysulfanes from crude gas formed during the production of hydrogen sulfide, comprising:
- a) passing said crude gas through a wash system comprising an aqueous or methanolic solution containing 1-20 wt% of a compound selected from the group consisting of:
- i) a compound of the formula (CnH2n+1)xNHy, where n =1-3, x =2 or 3, and y =0 or 1;
- ii) a compound of formula (CnH2n+1O)xNHy, where n =1-3, x =2 or 3, and y =0 or 1;
- and
- iii) ammonia;
- b) collecting said purified gas from the aqueous or methanolic solution of step a).
3 more elements
Dependencies are inferred from the claim text.