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FEB-21-1999 17 23 GENERRL CHEMICRL 281 515 1985 _P_cts~c+n <br />x 05588 ~ III IIIIIIIIIIIIIIII <br />• <br /> <br />United Stites Patent ; l9. <br />Stevenson <br />[ja[ PROCESS FOR yLUCING SODIUM <br />BICARBONATE FROM NAACOLIT&R[CH <br />SOL[TTIONS <br />[76j Inventor Tam D. Steveasoq ?417 Pelham DE. <br />Houston. TcX. 77019 <br />[21 ] Appl. Na: 4`15,883 <br />(7?I F•.Ird~ Dec?0,1995 <br />[5!J (nf Cl.° _._..._ ................ E22B 43!28; EZlC 43l2P. <br />COLD 7110 <br />[521 US. Cl....__.._.._......_..._......_._.__._. ?99/5; az31e7? <br />[58~ Eield of SrBrTh .___.___......_...._... 166!303: 399!4, <br />?99/5: 423/189. 206 2. 422 <br />[56] Re&rences Cited <br />[3.S PATENT f]OC[IMENTS <br />1 865.837 7!1932 Cherry ........._.._... _ __ _ e7~2a'22 X <br />7.739!'9 9l19Tj Eubtt e[ al. ....._.__ . _ _. I Ae/707 <br />3.759.574 9/1973 OrAra _ _._.,.___. ._......__... 299/4 <br />J.779.fi02 1!1973 0ard c[ il ___.__ .. ..............._. 19925 <br />J.780,ID0 VT 197] Wag6cnrr n d ......... ...._._. 423/189 X <br />7.79'_902 TJ191a 7bwc0 c[ al ............... ..._....._._. 29925 <br />3.868.4ae !1975 Fmvel n al......_........ ._... _. _.. a29/a22 <br />:.291p02 9/1981 AmDId ex al. ......__ _ _ _ ._. a2711l9 <br />a.J73.302 321987 Xalwr ._._ ............... ..._._.__..... 29924 <br />< e98 706 !1985 Ila+di c nl .__._ _ _ ._ .............. 199/5 <br />4.815,790 1/1989 Rnsar ct al. .____._ .___..._... 299/4 <br />3,273,796 (/1994 loos ._._-....._.._._. _._.._. i?3/422 X <br />Pn,.,c.y F•~-•:--r-~corgc A. Such6cld <br />Artomry, dgmC or Fi.m-Ke.Tneth A. Roddy <br />I StJPPLbmrrA4 c0~ <br />12 ClRir¢s, . Drawiag Sheets <br />?IIL:ILtrrT LIgaOR -RFLNAI? SSODOR COO/,INL <br />Faux ANp CARaaM DIOUD[ SOOl(nl ^SLMIDYaTS <br />YAHrL _.TS SSxc RCCOnGiY 01tiT -_ ~~ - ae vs saLT nS YTJI a..u <br />. nCCUJr uxxr <br />^YLSN PXRLpI OS <br />xarvs <br />NNfCOLtTC RIYL Saa21a1 erCARAOYATE nRV~TtOI[YG~J _ ~ <br />auo CMLT Pa11LIYL SNIT J IL <br />SALT Si11RY'. <br />fIA1rE-nC 9ALT vATT~1 31LT ~qIN£ <br />~ RAT~t nose <br />xaT CANOn13At! 9°L.T afLINL vwnnR RrLT+xPRa33SOX <br />TO ~_ SALT CRrsz'ALIZFF cMT <br />NAXOJL'T[ XTM[ LLL <br />SALT XR3trL <br />H-ca JUaS1T SOOT tn! D3CMaOYAT_' <br />SaoIVH alrJaaaXATE aRYlxc DNI3' <br />- - SILT 0lLAT`3t3NG <br />IM]T <br />([IrJf eoalTY a••T -- ]ALT aRYIXL a1rIT - ~~--- _ -.~ - <br />a6 <br />[u] Patent Number: 5,88,713 <br />(n51 Date of Patent: Dec 3T, I996 <br />[57] ABSTRACT <br />A procrss for tnald,+g sodium bigabonate from NanLVlite- <br />rich s0luuoes unliiu solubility supprasi0n with addinon of <br />sa1L HO[ aster pumprd into a Nahcolue-rirJt CoCfaali00. <br />whch may contain salt (hiaCl) avd Dthrr impurities :n <br />rYrr~s of 6% by waghL dtss0lvei the :Jahcolitc (NaHCO,) <br />and sal: The dissolved Nahcolite is brought to the surface as <br />a pregnant boor liquor cantaitvn8 Nahcolite. sa1L sad othu <br />rmpunlies, width is then de-gaved undo[ ptT.s3tue. The <br />p[cgn[mt liquor is then mired vri[h a salt slurry and iu <br />trirtpnatusc rcdurd m sawnte it w+th salt and (attz prc- <br />cipimtio0 of Nahcolite out of the otegnant liquor. Carbon <br />dioXidc (CO_) is injectetl while mrAmg [hc prcgna~t liquor <br />wi+l+ ~ salt to iacliute pn:cioitauon and cenvcnlon of any <br />SOd+utn ca:bona[c (p7a.Cy) preseat into sodium biarbOnarc <br />(NaHC07). The sa[ium bieazhoaate (NaHCO~ is dcwa- <br />tvcd Ind filsered to farm a sodium bicTUbonate (NaHCO,) <br />blur Cate, which is wrshed wrLh fresh cold water [o remove <br />rah (NaCq, sadism carhanau: (Na,COs). and o:ncT impu• <br />noes as u salt-rich brine filtrue. and the 61rer cake is drird <br />ro pmCua a high grade of natural sodium Inearhonace <br />(NaHCO,). Zac filvate may be prOerssed to produce hot <br />water rlmdrnsatr winch can then he used ro dissalvt the <br />Nahcolt:c, and dtc sal[ sltary produced can be used to <br />satuntC the pte~tant liquor and force Nahrolitt prenpda- <br />tian. and a Llarnao may he dried and used as a saleable <br />by-pmauc: <br />s <br />-S <br />s ~ <br />1~ <br />t <br />-~ \/O <br />o ~ <br />l <br />W ~ <br />~'~ _ . <br />~ ~ <br />~ -L <br />U <br />^O <br />`J <br />