Comprimo Sulfur Solutions

ADIP Liquid Hydrocarbon Treating

Application 
The ADIP process is a regenerative process developed to selectively reduce H2S and COS to very low levels in liquid hydrocarbons such as propane-propylene (PP), LPG and NGL. The process is based on regenerative absorption with an amine solvent in contact with the acidic feed. Removal of CO2 is also possible. H2S removal from LPG or NGL down to 20 ppmwt or lower, and COS removal down to 5 ppm wt as S are achievalbe.

Description
In liquid hydrocarbon treating, for example LPG, the feed stream is contacted counter-currently with lean ADIP in a packed liquid-liquid extractor column. Co-current and counter-current mixer/settlers are used for COS removal.

The treated LPG then passes through a coalescer to separate entrained ADIP solution. The rich ADIP solvent is flashed to remove entrained and/or dissolved hydrocarbons before passing to the regenerator. Stripping of the rich solvent is identical to that of gas treating.

Operating Conditions
The typical operating pressure is 20-40 bar and temperature 30 - 50 C.

References
More than 490 ADIP units ranging in capacity from 1.900 Nm3/d to 12.200.000 Nm3/d and 19 t/sd to 7.700 t/sd liquid hydrocarbons are in operation throughout the world, demonstrating the reliability of the process.

Licensor 
Jacobs Nederland B.V., Leiden, The Netherlands, and Jacobs Canada, Calgary together forming Jacobs Comprimo® Sulfur Solutions, is one of the three authorized licensors on behalf of Shell Research Ltd. since 1981.

Streams to be Treated Contaminants Removed
Natural Gas Liquids (NGL) H2S, COS
Liquefied Petroleum Gas (LPG) H2S, COS