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Reactivation of
                                              Palladium Catalysts

Through extensive R&D efforts, Eurecat has developed a novel method to recover the activity
of spent palladium catalysts. This technology, called Reactivation, involves a multi-step proc-
ess that identifies and carefully removes the contaminants causing deactivation of the cata-
lyst. After treatment with Reactivation, a high performance catalyst can be returned to the cus-
tomer with activity that often approaches the level of fresh catalyst.

                  Conventional regeneration techniques typically involve exposure of the catalyst to high tem-
                  peratures under air and/or steam to remove carbon contamination. Our tests have proven that
                  exothermic treatments such as this almost always lead to sintering of the active palladium
                  sites, resulting in the permanent loss of catalytic activity. In addition, an “air burn” does little
                  to remove other catalyst poisons and in fact can permanently bond some otherwise transient
                  poisons to the active sites.

                   Eurecat’s Reactivation process is much different than standard regeneration techniques. Each
                   project begins with a thorough analysis of the spent catalyst to determine the primary deactiva-
                   tion mechanism and levels of contamination. Once our analysis is complete, a treatment plan
will be developed to regain or tune the desirable catalytic properties . After processing a sample in our pilot
plant, specially developed hydrogenation activity tests are performed to confirm the effectiveness of the pro-
posed treatment plan. Activity test results, including a comparison of the Reactivated catalyst to fresh catalyst,
are presented to the customer for approval prior to processing on the commercial scale (when time allows).



Installed Applications

Chemicals / Petrochemicals                                     Refineries

•   Front End Acetylene Hydrogenation                          •   HF Acid Alkylation Pre-treat
•   Back End Acetylene Hydrogenation                           •   Sulfuric Acid Alkylation Pre-treat
•   MAPD
•   First Stage Pygas




                  Eurecat U.S. Inc                                               Visit us on the web at www.eurecat.com
                  1331 Gemini, Suite 310                                       Or send us an email at: info@eurecat.com
                  Houston, TX 77058
                  Phone : 281.218.0669
Hydro Isom erization Com parison


      3.5
                                                                                                                       As Received Methyl 2-butene
      3.0                                                                                                              Fresh Methyl 2-butene
                                                                                                                       Reactivated Methyl 2-butene
      2.5


      2.0
Wt%




      1.5


      1.0


      0.5


      0.0
                0            18       36          54          72          90           108       126    144         162       180         198
                                                                               Tim e

             Above catalyst installed in a refinery for a hydrofluoric acid alkylation pre-treat application. Butadiene
             conversion to the more desirable butene-2 was observed in Eurecat testing. The refinery experienced
             an octane boost over 2 points in their alkylate when compared to previously installed charges.



                                                              Front-end Ethylene Catalyst


                             Reactivated isoprene                       Reactivated isopentene                  Reactivated isopentane
      5.5
                             Reference isoprene                         Reference isopentene                    Reference isopentane
      5.0


      4.5


      4.0


      3.5


      3.0


      2.5


      2.0


       1.5


      1.0


      0.5


      0.0
         0.00        18.00          36.00         54.00         72.00          90.00         108.00    126.00        144.00      162.00         180.00
                                                                               T ime


             Front end total raw gas acetylene converter catalyst installed and operating on its 3rd REACTIVATION cy-
             cle (2+ years for each cycle).
             Catalyst demonstrates superior selectivity and comparable activity to its reference standard and has
             demonstrated a wide range of operational stability thus eliminating flaring incidents from hyper-activity.

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Eurecat palladium catalyst reactivation

  • 1. Reactivation of Palladium Catalysts Through extensive R&D efforts, Eurecat has developed a novel method to recover the activity of spent palladium catalysts. This technology, called Reactivation, involves a multi-step proc- ess that identifies and carefully removes the contaminants causing deactivation of the cata- lyst. After treatment with Reactivation, a high performance catalyst can be returned to the cus- tomer with activity that often approaches the level of fresh catalyst. Conventional regeneration techniques typically involve exposure of the catalyst to high tem- peratures under air and/or steam to remove carbon contamination. Our tests have proven that exothermic treatments such as this almost always lead to sintering of the active palladium sites, resulting in the permanent loss of catalytic activity. In addition, an “air burn” does little to remove other catalyst poisons and in fact can permanently bond some otherwise transient poisons to the active sites. Eurecat’s Reactivation process is much different than standard regeneration techniques. Each project begins with a thorough analysis of the spent catalyst to determine the primary deactiva- tion mechanism and levels of contamination. Once our analysis is complete, a treatment plan will be developed to regain or tune the desirable catalytic properties . After processing a sample in our pilot plant, specially developed hydrogenation activity tests are performed to confirm the effectiveness of the pro- posed treatment plan. Activity test results, including a comparison of the Reactivated catalyst to fresh catalyst, are presented to the customer for approval prior to processing on the commercial scale (when time allows). Installed Applications Chemicals / Petrochemicals Refineries • Front End Acetylene Hydrogenation • HF Acid Alkylation Pre-treat • Back End Acetylene Hydrogenation • Sulfuric Acid Alkylation Pre-treat • MAPD • First Stage Pygas Eurecat U.S. Inc Visit us on the web at www.eurecat.com 1331 Gemini, Suite 310 Or send us an email at: info@eurecat.com Houston, TX 77058 Phone : 281.218.0669
  • 2. Hydro Isom erization Com parison 3.5 As Received Methyl 2-butene 3.0 Fresh Methyl 2-butene Reactivated Methyl 2-butene 2.5 2.0 Wt% 1.5 1.0 0.5 0.0 0 18 36 54 72 90 108 126 144 162 180 198 Tim e Above catalyst installed in a refinery for a hydrofluoric acid alkylation pre-treat application. Butadiene conversion to the more desirable butene-2 was observed in Eurecat testing. The refinery experienced an octane boost over 2 points in their alkylate when compared to previously installed charges. Front-end Ethylene Catalyst Reactivated isoprene Reactivated isopentene Reactivated isopentane 5.5 Reference isoprene Reference isopentene Reference isopentane 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.00 18.00 36.00 54.00 72.00 90.00 108.00 126.00 144.00 162.00 180.00 T ime Front end total raw gas acetylene converter catalyst installed and operating on its 3rd REACTIVATION cy- cle (2+ years for each cycle). Catalyst demonstrates superior selectivity and comparable activity to its reference standard and has demonstrated a wide range of operational stability thus eliminating flaring incidents from hyper-activity.