Patent ID: 9504984
Filing Date: 2016-11-29
CPC Classification: B01J,C01B

Claim Text:
1. A system for generating elemental sulfur, comprising: a gas treatment system to provide a processed feed gas comprising carbon dioxide, hydrogen sulfide, and hydrocarbons; a distillation column comprising a rectifying section, a freeze zone section, and a stripping section, wherein the distillation column is configured to receive the processed feed gas, freeze carbon dioxide from the processed feed gas in the freeze zone section, and generate a natural gas stream and a liquid high-pressure acid gas stream, wherein the liquid high-pressure acid gas stream comprises hydrogen sulfide and carbon dioxide and is at a pressure of at least 500 psig; a reactor configured to receive a portion of the liquid high-pressure acid gas stream and to partially combust the portion of the liquid high-pressure acid gas stream to generate a limiting reactant; a plurality of reactors configured with a shell side and a tube side, wherein the tube side comprises a plurality of reaction tubes, and wherein a reaction in each of the reaction tubes between a portion of the liquid high-pressure acid gas stream from the distillation column and the limiting reactant produces a partially-reacted high-pressure acid gas containing elemental sulfur; a plurality of condensers configured to condense the partially-reacted high-pressure acid gas and form an overhead acid gas stream and a liquid elemental sulfur stream; and a plurality of separators configured to recover elemental sulfur.