SAP PURCHASE REQUISITION: 4200230834. NNC08VD82P DYNASEP LLC SPECIFICATIONS FOR AN AUTOMATED SYSTEM FOR DRY…

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SAP PURCHASE REQUISITION: 4200230834. NNC08VD82P DYNASEP LLC SPECIFICATIONS FOR AN AUTOMATED SYSTEM FOR DRYING AEROGELS USING SUPERCRITICAL CARBON DIOXIDE A DRYING SYSTEM IS REQUIRED FOR THE PROCESSING OF AEROGEL. THE PURPOSE OF THIS SYSTEM IS TO DRY SATURATED AEROGEL (HYDROGEL) SAMPLES OF VARIOUS COMPOSITIONS FROM SOLVENTS USING SUPERCRITICAL CO2. THE SPECIFICATIONS FOR THIS SYSTEM ARE AS FOLLOWS: 1. THE SYSTEM SHALL BE CAPABLE OF PERFORMING THE FOLLOWING GENERAL PROFILE: A. THE EXTRACTION CHAMBER(S) ARE MANUALLY LOADED WITH A NUMBER OF HYDROGEL SAMPLES IMMERSED IN SOLVENT. B. THE SURROUNDING BULK SOLVENT IS DISPLACED BY LIQUID (SUBCRITICAL) CARBON DIOXIDE AT A USER SELECTABLE RATE. C. THE SAMPLES ARE ALLOWED TO SOAK SURROUNDED BY LIQUID CARBON DIOXIDE FOR A USER SELECTABLE AMOUNT OF TIME. D. THE NOW SOLVENT-CONTAMINATED LIQUID CARBON DIOXIDE IS DISPLACED WITH CLEAN LIQUID CARBON DIOXIDE AT A USER SELECTABLE RATE. E. STEPS C AND D ARE REPEATED A USER SELECTABLE NUMBER OF TIMES. F. THE SYSTEM IS HEATED TO BRING THE LIQUID CARBON DIOXIDE (BOTH THE BULK LIQUID AND THE LIQUID IN THE PORES OF THE HYDROGEL) TO A USER SELECTABLE TEMPERATURE ABOVE THE CRITICAL POINT OF CARBON DIOXIDE. G. ONCE THE CARBON DIOXIDE IN THE CHAMBER REACHES THE SELECTED TEMPERATURE AND PRESSURE CONDITIONS, THE CO2 INLET TO THE EXTRACTION CHAMBER IS CLOSED, AND THE CHAMBER TEMPERATURE IS MAINTAINED WHILE THE SUPERCRITICAL CARBON DIOXIDE IS VENTED AT A USER SELECTABLE RATE TO REACH AMBIENT PRESSURE, LEAVING DRY AEROGEL SAMPLES. 2. THE SYSTEM SHALL BE COMPOSED OF MATERIALS WHICH ARE COMPATIBLE WITH SUPERCRITICAL CO2 AND COMMON SOLVENTS SUCH AS ACETONE, ACETONITRILE, ETHANOL, METHANOL, THF, AND NMP. 3. THE SYSTEM SHALL RISE TO A PRESSURE OF AT LEAST 100 BAR (1450 PSIG) IN STEP B, ABOVE, AND MAINTAIN THAT MINIMUM PRESSURE THROUGH STEP F. 4. THE SYSTEM SHALL BE CAPABLE OF MAINTAINING A TEMPERATURE OF AT LEAST 60 C IN THE ABOVE STEP F., AND ALL HEATED PARTS WILL BE RATED FOR CONTINUOUS OPERATION AT THE HIGHEST TEMPERATURE THE SYSTEM IS CAPABLE OF MAINTAINING. 5. THE SYSTEM SHALL INCLUDE FOUR CYLINDRICAL EXTRACTION CHAMBERS, TWO WITH A NOMINAL VOLUME OF 1 LITER EACH AND TWO WITH NOMINAL VOLUMES OF 4 LITERS EACH. 6. THE MINIMUM ACCEPTABLE USABLE INTERNAL DIAMETER FOR A 1 LITER EXTRACTION CHAMBER IS 7.62 CM (3 ) 7. THE MINIMUM ACCEPTABLE USABLE INTERNAL DIAMETER FOR A 4 LITER CHAMBER IS 15.24 CM (6 ) 8. THE SYSTEM SHALL BE CAPABLE OF OPERATING WITH A SINGLE EXTRACTION CHAMBER, ALL FOUR EXTRACTION CHAMBERS, OR ANY COMBINATION, ALL FOLLOWING THE SELECTED TIME / TEMPERATURE / PRESSURE PROFILE. IF IT IS NOT PRACTICAL TO OPERATE ALL OF THE CHAMBERS IN PARALLEL (FILLING OR DRAINING ALL SELECTED CHAMBERS SIMULTANEOUSLY) THEY CAN BE OPERATED SEQUENTIALLY WITHIN A STEP. FOR A MULTI-CHAMBER RUN IT IS NOT PERMISSIBLE TO CARRY EACH CHAMBER THROUGH STEPS A F (SEE PARAGRAPH 1 ABOVE) INDIVIDUALLY AND THEN RESTART THE PROCESS FOR THE NEXT CHAMBER IN SEQUENCE. 9. HEATED VALVES SHALL BE INSTALLED WHEREVER THERE IS SUFFICIENT EXPANSION OF CO2 THROUGH THE VALVE TO CAUSE FREEZING. (FOR EXAMPLE, IF, IN STEP D, ABOVE, THE CO2 IS VENTED TO ATMOSPHERE AT A CONTROLLED RATE THE VALVE THAT THE CO2 IS VENTED THROUGH MUST BE HEATED TO PREVENT BLOCKAGE BY DRY ICE, RESIDUAL SOLVENT, OR THE CONDENSATION AND FREEING OF WATER FROM THE ATMOSPHERE.) 10. THE CHAMBER SHALL BE EQUIPPED WITH HEATERS SUFFICIENT TO ALLOW IT TO ATTAIN AND MAINTAIN ITS MAXIMUM OPERATING TEMPERATURE. 11. THE SYSTEM SHALL COLLECT WASTE SOLVENT AS A LIQUID IN A MANNER THAT ALLOWS IT TO BE SAFELY REMOVED FOR PROPER DISPOSAL. 12. THE VOLUME OF THE WASTE SOLVENT COLLECTION VESSEL(S) SHALL BE SUFFICIENT TO CONTAIN ALL OF THE SOLVENT COLLECTED DURING A DRYING RUN, WITH A MINIMUM VOLUME OF 10 LITERS. 13. CARBON DIOXIDE SHALL BE PROVIDED TO THE SYSTEM USING A PUMP CAPABLE OF DELIVERING AT LEAST 450G OF CO2/MIN AT THE HIGHEST RATED OPERATING PRESSURE OF THE SYSTEM. 14. THE PUMP SHALL BE COOLED USING AN EXTERNAL CHILLER TO BE P