Document Qk3E7yJDvk2oK75Na1XVKaKVo

ppqcess. cwe&VteuO *\ y _D A Op]0], Ethanolamines / Glycol Ethers Consolidated Audit Process Overview Process Description (The Ethanolamines process^ Ethanolamines are produced from the liquid phase reaction of Aqueous Ammonia and Ethylene Oxide (EO). There are three main reactions which take place simultaneously to give Monoethanolamine (MEA), Diethanolamine (DEA), and Triethanolamine (TEA) and higher molecular weight compounds. The product mix can be controlled within certain limits by adjusting the Ammonia/EO feed ratio or by the recycling of finished products (MEA or DEA) back to the reactor system. The aqueous ammonia concentration ranges from 60 to 65 wt% ammonia. The plant's current capacity is 185 MM Ib/yr of Ethanolamines at varying product mixes. The reaction of EO and aqueous ammonia takes place in a reactor system consisting of an isothermal and adiabatic reactor. After the reactor a mixture of ammonia, water, MEA, DEA, and TEA flows to the ammonia removal system where the excess ammonia is removed, recovered and recycled back to the reactor system. After the ammonia is removed, the mixture then flows to the water removal system where the water is removed and recycled back to the reactor system. From the water removal system, a stream of crude mixed ethanolamines (MEA, DEA, TEA, highers) is fed to the purification system, where MEA, DEA, and TEA are purified by vacuum distillation. The purified MEA, DEA, and TEA are then pumped to their respective finished storage tanks. From storage the .finished products are loaded and shipped to the customers via tank trucks, tank cars, barges, ships, or drums. JAS 5/7/93 no A 071015 OONP T DF'NT I Al. ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process Process Flow Sheet MEA DO A 0 ? 1 0 U C O N F ID F N T T A l Dow Confidential JAS 5/7/93 .... ETHANOLAMINES / GLYCOL ETHERS ------ The Glycol Ethers Process Process Flow Sheet - EB Series EB DO A 0 ? 1 0 1 7 C O N F ID F N T I A! ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process Process Chemistry DESIRED REACTIONS EO [CH2CH2Q] + NH3 aq. [Aqueous Ammonia] = MEA [HOCH2CH2NH2] EO + MEA = DEA [ (HOCH2CH2)2NH] EO + DEA = TEA [(HOCH2CH2)3N] UNDESIRED REACTIONS EO + H2O = MEG [CH2OHCH2OH] EO + MEA = MEAGE [HOCH2CH2OCH2CH2NH2] EO + DEA = DEAGE [HOCH2CH2OCH2CH2NHCH2CH2OH] EO + TEA = TEAGE [H0CH2CH20CH2CH2N(H0CH2CH2)2] Dow Confidential JAS 5/7/93 ETHANOLAMINES / GLYCOL ETHERS TheEthanolamines Process C O N F ID E N T IA L Ammonia (aqueous) Dow Confidential JAS 3/10/93 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Reactor System) From D-101 To R-201 (E.O.) P-201 A/B (E.O. Feed Pumpsl Sundyne Vertical Centrifugal 19,200 lbs/hr@ 2100 ft Head 75 hp 3500 rpm motor Gearbox 14,700 rpm To R-201 (Aq. NH3) 60-65 wt% NH3 From D-210 P-212 A/B (Aqueous NH3 Feed Pumpst Sundyne Vertical Centrifugal 54,000 Ibs/hr @ 2100 ft Head 200 hp 3500 rpm motor Gearbox 14,700 rpm Dow Confidential JAS 3/10/93 no a ooiooo C O N F ID E N T IA L ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process Process Flow Sheet n oo ^n o o x> ^o 2V \> i CTW E-101 r D-101 P-201 A/B (EO Feed Pumps) Sundyne Vertical Centrifugal 316L SS 19,200 Ibs/hr @ 2100 ft Head 75 hp 3500 rpm motor Gearbox 14,700 rpm EO FROM GLYCOL 2 v ) D-101 fEO Surge Drum) 3 ft I.D. x 8.5 ft T-T CS Design P&T: 200 psig & 250 F Operating P&T: 100 psig & 30 C Capacity: 500 gals {3,600 lbs) PSV set pressure: 200 psig y P-201 A/B TO REACTOR Dow Confidential JAS 5/7/93 2 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process Process Flow Sheet DS-205 (Ammonia Storage Sphere) 35 ft I.D do a a yu ys, C O N F T D F N T IA l Ammonia from railcars P-205 A/B Dow Confidential JAS 5/7/93 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Reactor System) E.O. NH3 (aq.) Condensate R-201 (Isothermal Reactor) 9 ft I.D. x 43 ft T-T Tubeside is (22) exchangers in series. Each exchanger contains (60) - 5/8" O.D. x 40 ft 316L SS tubes. Design P&T (tubes): 950 psig & 300F Design P&T (shell): 50 psig & 300F Operating P&T (tubes): 825 psig & 100-200F Operating P (shell): 200 - 400 mmHG (rate dependent) Ammonia Removal R-202 (adiabatic) R-201 (Adiabatic Reactor) 2.5 ft I.D. x 30 ft T-T 60 baffles 6" spacing 316L SS Design P&T: 955 psig & 300F Operating P&T: 825 psig & 21 OF E-201 (R-201 condenser) Horizontal condenser with sheflside condensing 34" I.D. CS Shell (472)-1" O.D. x 24 ft. CS tubes 2965 sq. ft area 2 Tube passes Cooling tower water as cooling medium Dow Confidential JAS 3/10/93 OONFI D F N T I At ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (NH3 & Water Removal System) To D-210 (NH3 and water) -- ETHANOLAMINES / GLYCOL ETHERS _______ The Ethanolamines Process (NH3 & Water Removal System) To D-210 (NH3 and water) E-218 (P-218 Reboileh Vertical Thermosiphon 14" I.D. 316L SS shell {85)-r O.D. x 8 ft 316L SS tubes 171 sq. ft area Low pressure condensate (<100 psig) as heating medium __ D-218 D-218 (NH3 Flash Druml 4 ft I.D. x8ftT-T 316L SS 316L SS York Demister Design P&T: 300 psig & 300F Operating P&T: 100 psig & 150F Condensate E-218 From R-202 VZZ f E-219 Condensate *------- ------ E-219 (D-218 Reboilerl Vertical Thermosiphon _______ ^ 35" I.D. CS shell (637)-1" O.D. x 8 ft 316L SS tubes 1279 sq. ft area Low pressure condensate (<100 psig) as heating medium To T-220 (NH3, water, MEA, DEA, TEA) Dow Confidential JAS 3/10/93 DO A 0 2 1 0 2 5 CO NFIDENTIAL ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (NH3 & Water Removal System) To D-210 (NH3 and water) From D-218 r T-220 (Primary NH3 Stripped 3 ft I.D. x 39 ft T-T Tower: 316L SS / Internals: E-brite 22 ft of Norton #50 IMTP random dump packing Design P&T: 300 psig & 450F Operating P&T: 100 psig & 255F \ T-220 Low Press.Steam t--- --- E-220 J E-220 rr-220 Reboiler) Vertical Thermosiphon 28" I.D. CS shell (389)-1" O.D. x 8 ft E-brite tubes 781 sq. ft area Low pressure steam (<100 psig) as heating medium n o2~n oo To T-230 (NH3, water, MEA, DEA, TEA) o 2HTT !OV-* 3~>->< OO\>' Dow Confidential JAS 3/10/93 ETHAN0LAM1NES / GLYCOL ETHERS The Ethanolamines Process (NH3 & Water Removal System) To T-211 (NH3 and water) From T-220 s ** T-230 fSecondary NH3 Stripped 3 ft l.D. x 42 ft T-T Tower / Internals: Trays 1 thru 8: E-brite / 410 SS Trays 9 thru 18: 316L SS (18)- Glitsch A-1 ballast trays 18" tray spacing Design P&T:150 psig & 400F Operating P&T: 20 psig & 265F Low Press.Steam or -- 235 psig Steam - T-230 ,___ ____ j E-230 E-230 rr-230 Reboilerl Vertical Thermosiphon 33" l.D. CS shell (570)-1" O.D. x 8 ft 316L SS tubes 1132 sq. ft area Low pressure steam (<100 psig) or 235 psig steam as heating medium r> o zTl o o D 52 '0 <-< Vot To T-240 (water, MEA, DEA, TEA) J Dow Confidential JAS 3/10/93 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (NH3 & Water Removal System) ToT-211 (water) CTW T-240 (Ethanolamines Dehydrator) 8 ft f.D. x 65 ft T-T Tower / Internals: 316L SS (20) - Gfitsch A-1 balfast trays Tray spacing varies ( 24", 30", 36") Design P&T:100 psig & 300F Operating P&T: 85 mm Hg & 290F From T-230 1 235 psig steam ------------- E-240 E-241 E-241 fT-240 Condensed T-240 Horizontal Internal U-tube 55" i.D. 316L SS shell (835)-1.0"O.D. 316LSS U-tubes 3704 sq. ft area 6 tube passes Cooling tower water as cooling medium E-240 fT-240 Reboiler) Vertical Falling Film cocurrent flow 54" I.D. CS shell (534)-1.5" O.D. x 16 ft 316L SS tubes 3223 sq. ft area 235 psig steam as heating medium To T-250 (MEA, DEA, TEA) Dow Confidential JAS 3/10/93 8 00 A 0?1078 C O N F ID E N T ! A1 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process o ozn oo >D-< > O h O 3> V Dow Confidential JAS 3/10/93 DO A 0 0 1 0 3 0 O O NFIDFNTIAl ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (NH3 Recovery System) } r*D-218 and T-220 OHS E-210 (D-210 Condensed Vertical Falling Film cocurrent flow 60" I.D. CS shell {1836)-1.0" O.D. x 24 ft 316L SS tubes 11,135 sq. ft area 1 tube pass Cooling tower water as cooling medium Anhydrous NH3 D-210 (Ammonia Absorber) 8 ft I.D. x 32 ft T-T CS with 1/8" 316LSS clad Design P&T: 300 psig & 300F Operating P&T: 100 psig & 10OF Inerts To T-211 From T-211 Aq. NH3 (60-65 wt% NH3) To R-201 Dow Confidential JAS 3/10/93 10 ETHANOLAMINES / GLYCOL ETHERS ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Purification System) MEA DEA TEA n o2 O7) -oT<l X> Q Dow Confidential JAS 3/10/93 12 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Purification System) MEA to storage T-250 (Monoethanoiamine Finishing Towers 6.5 ft I.D. x 32 ft T-T 316L SS tower and packing 5.625 ft of Koch-Sulzer BX structured packing CTW Top: 2.8125 ft Bottom: 2.8125 ft Design P&T:100 psig & 400F From T-240 Jl E-251 Operating P&T:20 mm Hg & 340F E-251 (T-250 Condensed T-250 Horizontal internal U-tube 46" I.D. 316L SS shell (238}-1.0"O.D. 316LSS U-tubes 475 psig steam 845 sq. ft area 6 tube passes E-250 ^ Cooling tower water as cooling medium E-250 (T-250 Reboilert Vertical Falling Film countercurrent flow 65" I.D. CS shell {504)-2.0" O.D. x 8 ft 316L SS tubes 2107 sq. ft area 475 psig steam as heating medium > To T-260 ( DEA, TEA) Dow Confidential JAS 3/10/93 13 IV U N X q i JNQ ^'CO k * o y o n ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Purification System) DEA to storage T-260 (Diethanolamine Finishing Tower) 7.0 ft I.D. x 33 ft T-T 316L SS tower and packing 7.875 ft of Koch-Sulzer BX structured packing CTW Top: 3.9375 ft Bottom: 3.9375 ft Design P&T:100 psig & 450F From T-250 _L E-261 Operating P&T:12 mm Hg &410F E-261 (T-260 Condenser) T-260 -- Horizontal Internal U-tube 22" I.D. 316L SS shell (49)-1.0"O.D. 316LSS U-tubes 475 psig steam 202 sq. ft area 2 tube passes Cooling tower water as cooling medium E-260 E-260 (T-260 Reboiler) Vertical Falling Film countercurrent flow 59" I.D. CS shell {414)-2.0" O.D. x 8 ft 316L SS tubes 1742 sq. ft area 475 psig steam as heating medium To T-271 {TEA & highers) Dow Confidential JAS 3/10/93 14 ETHANOLAMINES / GLYCOL ETHERS The Ethanolamines Process (Purification System) TEA to storage T-271 (Triethanolamine Finishing Towers 9 ft I.D. x 52 ft T-T 316L SS tower and packing 14 ft Koch-Sulzer BX structured packing CTW Top: 8 ft Bottom: 6 ft Design P&T:100 psig & 550F From T-260 H E-273 Operating P&T: 2 mm Hg & 400F E-273 (T-271 Condenser) 1 T-271 Horizontal Internal U-tube 38" I.D. 316L SS shell (90}-1.0"O.D. 316LSS U-tubes 475 psig steam 399 sq. ft area 2 tube passes E-270 Cooling tower water as cooling medium E-270 (T-271 Reboilert Vertical Falling Film cocurrent flow 41" I.D. CS shell (340J-1.5" O.D. X 8 ft 316L SS tubes 957 sq. ft area 475 psig steam as heating medium To Storage (TEA & Highers) Dow Confidential JAS 3/10/93 15 DO A 0 0 1 0 3 5 C O N F T D F N T IA L . ETHANOLAMINES / GLYCOL ETHERS The Glycol Ethers Process Process Chemistry - PM Series DESIRED REACTIONS * PO [CH2OCHCH3] + MEOH [CH3OH] =PM2 [CH3OCH2CHOHCH3] PO + PM = DPM [ CH3OC3H6OC3H6OH] PO + DPM = TPM [CH3OC3H6OC3H6OC3H6OH] PO + TPM = Highers [T4PM, TsPM & highers] UNDESIRED REACTIONS * PO + MEOH = PMi [HOCH2CHOCH3CH3] PO + H2O = MPG [CH3CHOHCH2OH] PO + MPG = DPG [(CH3CH0HCH2)20] PO + DPG = TPG [H0(C3H60)2C3He0H] * KOH is present as a catalyst Dow Confidential JAS 5/7/93 DO A 0 ? 1 0 3 fo f.O NFIDFNTIAl.. ETHANOLAMINES / GLYCOL ETHERS i ud Glycol Ethers Proc^w Process Chemistry - PM Series UNDESIRED REACTIONS * PO + HEAT = AA [H2CCHCH2OH] PO + AA = PA [ H2CCHCH2OCH2CHOHCH3] PO + PA = DPA PO + DPA = TPA * KOH is present as a catalyst Dow Confidential JAS 5/7/93 DO A OP 1 0 3 7 c o n f id e n t ia l ETHANOLAMINES / GLYCOL ETHERS The Glvcol Ethers Process Dow Confidential JAS 3/10/93