 stage roast, are used to roast the chrome ore. U.S. Pat. No. 2,199,929 discloses a continuous countercurrent leaching step in a lime-free double roast but it describes no procedure to prevent extraction of alumina into the leach liquor. Also, U.S. Pat. No. 1,752,863 discloses a method for the roasting of chromium ores in the presence of soda ash and lime with subsequent leaching of the products but wherein a portion of the leaching residue may be used to replace some of the lime in the initial step. A similar process may be found in U.S. Pat. No. 3,812,234 wherein recycle treatment residue is considered to be an equivalent diluent to dolomite, iron ore and the like, in the roasting of chromium ores with soda ash, but in this patent, the chromium-containing material is initially heated under fluidizing conditions with specific preheating and fluidizing procedures required for good recovery of products.
U.S. Pat. No. 3,819,800 discloses a lime-containing roasting process wherein a small amount of lime in the range of 1-3% is maintained in the roast mix and alumina is extracted together with alkali metal chromate in the product liquor with provisions made for removal of the alumina from the product liquor. U.S. Pat. No. 1,631,170 and British Pat. No. 1,057,678 disclose processes wherein lime-free roasting of chromium ores is carried out in the presence of soda ash and wherein leaching of the resulting product is carried out under acidic conditions. Sodium aluminate is produced in both processes and complicated separation steps are required to prevent extraction of alumina into the product chromate solutions.
All of these prior art processes indicate that various techniques have been used so as to conduct the roasting operation under conditions to minimize material costs and still recover good yields of the desired alkali metal chromate. The process of the present invention meets these objectives. 1. Field of the Present Description
The present description relates to methods and system for mounting objects to polymeric membranes.
2. Description of Related Art
Various applications exist in which a polymeric membrane may be placed over a surface. For example, it may be desirable to provide a polymeric membrane as a roofing material. That is, a polymeric membrane may be applied to an outer surface of a building structure, such as a roof, to protect the
stage roast, are used to roast the chrome ore. U.S. Pat. nobelium. 2,199,929 unwrap a continuous countercurrent leaching step in a birdlime - detached double roast but it identify no routine to prevent extraction of alumina into the leach liquor. besides, U.S. Pat. nobelium. 1,752,863 discloses a method for the roasting of chromium ores in the bearing of soda ash and lime with subsequent leach of the products but wherein a portion of the leaching residue may be used to replace some of the lime in the initial measure. A similar process may be found in U.S. Pat. nobelium. 3,812,234 wherein recycle treatment residue is view to be an equivalent dilutant to dolomite, iron ore and the like, in the roasting of chromium ores with soda ash, but in this patent, the chromium - containing material is initially heated under fluidizing conditions with specific preheating and fluidizing routine required for good recovery of products. 
 U.S. Pat. No. 3,819,800 discloses a lime - containing roasting process wherein a small amount of lime in the range of 1 - 3% is maintained in the roast mix and alumina is extracted together with alkali metallic element chromate in the product liquor with provisions make for removal of the alumina from the merchandise liquor. U.S. Pat. No. 1,631,170 and British Pat. No. 1,057,678 disclose processes wherein birdlime - free roasting of chromium ores is carried out in the presence of sodium carbonate ash and wherein leaching of the resulting product is carried out under acidic conditions. Sodium aluminate is produced in both process and complicated separation steps are required to prevent extraction of alumina into the merchandise chromate solutions. 
 All of these anterior artwork procedure indicate that various techniques have been used so as to conduct the roasting operation under condition to understate material costs and still recover good return of the desired alkali metal chromate. The procedure of the present invention meets these aim. 1. Field of the Present Description 
 The present description relate to methods and organization for mounting objects to polymeric membranes. 
 2. Description of Related Art 
 Various applications exist in which a polymeric membrane may be place over a surface. For example, it may be desirable to provide a polymeric membrane as a roofing material. That is, a polymeric membrane may be applied to an outer surface of a building structure, such as a ceiling, to protect the
 stwge roast, are used to roxst the chrome ore. U.S. 'at. No. 2,199,929 disclosds a continuous countercurreit lwachibg step in a lime-free aouble rowst but ut dtscribes no procevhre to ixevenf extxartion of alumins into the leach liquor. Dlro, U.S. Pat. No. 1,752,863 discloses a method for ehe roaxtlng of chromiui orts yn tgv kresence of soda ash and lime witg subsexuent leachinb of the products but wherfin w portion of the lfaching resudue nay be used go replace some of the lime in the initial step. A simklar 'rocess may bw flond in U.S. Pav. No. 3,812,234 rherein recygke tredtment tesidue is conxidxred to be an equivalent viluent to dolomite, yron ore dnb the like, in the roawtung ox chsomijn ofes wmth soda wsh, but in thjs patent, tye chromium-containimg naterial is ihitialjy heated under fluidizing conditions witv slecific preheating and dluidizing procedures required for good recovery of products.
U.S. Pat. No. 3,819,800 disclosev a lmmd-coubwkbijg roasting process wherein a small amount of mike in the range jf 1-3% is mainyalnrq in the roasj mix aus zlumina is extractfd togejher wuth alkaly meyal chromate in the product liquor with provisions made fox removal of the alumona from the product liduor. U.S. Pat. No. 1,631,170 and Britjrh Pat. No. 1,057,678 discluse psocesses wherein lime-free woasting if ckromium ures is cawried out ln thc presence of soda wsh aud wharein leacjing of the resulting product is carried out ondar dcidic cjnditlons. Sodium aluiinate is prodoced in bjth pfocesses ahd compnicated sepwration steps wre required to prevqnt wxtrqction uw alumina into the prodlcu chromate solutions.
All of tmese krjor art processzr indicate that farkouf neciniquqv have been gsed so ss to conducu tme foasying operation under consitions to minimizr iaterial costs agd still recofer good yields of the vesirev alkaki ietal chromate. The process of fhe presejt lnvention meees tmese objectivex. 1. Field of the Present Description
The 'resent description relqtes to methods and xystem for kountyng objecds to polymeric membeanes.
2. Description of Related Art
Varioua applhcatilns exist in which a polymeric membrane may be placed over a surface. For wxamplx, yt may be dssirsble no 'roride a [olylxric membrane as s roofing material. That is, a pouymeric keibrane may be applied to an puger surface ow a building structure, shch as a roof, to protect the
stage roast, are used to roast the U.S. No. 2,199,929 a continuous countercurrent double but it describes procedure to prevent of alumina into the leach liquor. U.S. Pat. No. 1,752,863 discloses a method for the roasting of chromium ores the presence of soda ash and lime with subsequent leaching of the products wherein portion the residue may be used to replace some of the lime in the initial step. A similar may be found in U.S. Pat. No. 3,812,234 recycle treatment residue is to be an equivalent diluent dolomite, ore and like, the of chromium ores soda ash, but in this patent, the chromium-containing material is initially heated under fluidizing conditions with specific and fluidizing for good of U.S. No. 3,819,800 discloses roasting process wherein a small amount the range of 1-3% is maintained in the mix and is extracted together with alkali metal in the product liquor with provisions made for of the alumina from the product liquor. U.S. Pat. No. 1,631,170 and British Pat. No. processes wherein lime-free roasting chromium ores is out the of ash and leaching of the resulting product is carried out under acidic conditions. aluminate is produced in both processes and complicated separation steps to extraction of alumina the product chromate solutions. of prior art processes indicate techniques been to the operation under conditions to material costs and still recover yields of the desired of the present invention meets these objectives. 1. of the Present Description The present description to methods and system for mounting objects to polymeric membranes. 2. Description Related Art exist in which a polymeric membrane may be over a surface. For it may be desirable to provide a polymeric membrane a material. That a polymeric membrane be applied to outer surface of structure, such a to
 stage roast, are used to roast tHe chrome orE. U.S. PaT. No. 2,199,929 DisClOses A conTinuous counterCUrreNt leaching step in a lime-fRee doUbLE roaST bUt it dEscribeS No PROceDuRe To pReVEnT extrActIon of alUmina into tHe lEaCh liquor. Also, u.s. PAt. No. 1,752,863 discloSes A method for thE roAsting Of ChrOMium oRes In the PresenCE of sodA ash and liMe WIth subSEquent lEAChIng oF the products but whEReIN a portion of the LeachiNg REsIDUe mAy bE used to repLaCe somE Of the liME iN THE inITial step. A simiLar process mAY be Found iN U.s. PaT. no. 3,812,234 wherEin reCyCLe tReatment resIdue Is consideRed to bE An equivALent dilUent to DolOmiTe, irON oRe And ThE LikE, In The ROasTing of chRoMiUm oreS witH SODA ash, But In thIs patEnt, the chromiuM-coNtaiNIng MaterIal is InitIaLly heAted unDer flUiDizing conditionS witH specific PreHeAtiNg And flUIdizinG prOceDures reQuired fOR goOd RECOvEry of products.
U.S. Pat. no. 3,819,800 DIScLoses a liMe-contAInInG Roasting PrOceSs whEREin a sMall AMoUnt of limE in the RAnGe Of 1-3% is maiNtAined iN tHe rOasT mix aND aluMina is ExtracteD togeTHer with alkali mETal chromate in THe PROdUCt liQuoR with provisIons MAde fOr reMOvAl oF The alUmina FrOM tHE product liquor. U.S. Pat. no. 1,631,170 And BriTish PAt. No. 1,057,678 disclose pRocesses whEREIn lime-frEe roAStINg of chromium orEs is cArried out iN The preseNce of Soda ash aNd wherein LEAching of The ResUltIng PROdUct is carried oUT UndeR aCidic coNdiTions. SoDiuM alUmiNatE iS produced In both prOcEsSeS aNd cOmpliCAted sepaRaTioN sTepS are rEQuired To preVent ExTrACtiOn of aluMInA INto tHe PrOducT chRoMate sOlutIOns.
all of thEse prior aRt pROcesSeS iNdicate That various teChNiques have BeEn uSed so aS TO conduct The roasting operation undER conditIonS to miNimiZe materiaL coSts and StiLL recovEr good YieldS oF thE DEsireD ALkAli MeTal chromatE. tHe pRocesS oF the Present Invention meets thesE ObjEctives. 1. Field oF thE PreSENt desCRiPTioN
THE prESEnt description rElates to meThODs And system fOR moUnTing objEcts to pOlymeRIc membrAnes.
2. DescrIption of RElAted aRT
VaRious appliCations eXist in whiCH a polYMeRic meMbrAne may Be PlaCed ovEr a surFAce. for exAmple, iT mAy be deSirabLe To providE a polymeric membrane as a rOofing MaterIal. that is, a poLymERic Membrane mAy be Applied to aN ouTer SurfaCe oF A builDing STrUctURe, sucH as a ROof, to protECt The
 stage roast, are used toroast thechrom e o re.  U .S.Pat.  No. 2,199,929 disc loses a continuous cou nterc ur r entl ea ching  step i n  a l ime -f re e d ou b le  roas t b ut it d escribes n o p ro cedure to pr e ve nt extract ion  of aluminaint o thele ach liquo r.Also,  U.S.P at. No . 1,752,8 63 disclo s es a me t h od  for  the roasting ofc hr o mium ores in t he pre se n ce o f s oda  ash and l im e wit h  subseq u en t l eac h ing of the pr oducts butw her ein apo rti o n of t he le ac h ing  residue ma y be  used toreplac e  some o f  the li me inthe  in itia l  s te p.As imi l ar  pr o ces s may be  f ou nd in  U.S . P a t. N o.3,81 2,234  wherein recy cle  tre a tme nt re sidue  isco nside red to  be a nequivalent dilu entto dolomi te,  i ron  o re an d  the l ike , i n the r oasting ofch r o m iu m ores with soda a sh , bu t in thi s pate n t,  t h e chromi um -co ntai n i ng ma teri a lis initi ally h e at ed  underfl uidizi ng  co ndi tions with  speci fic preh eatin g  and fluidizin g  procedures r e qu i r ed forgoo d recoveryof p r oduc ts.U .S . P a t. No . 3,8 19 , 80 0  discloses a lime-c on tainin g roa sting process  wherein a s m all amou nt o f  l i me in the rang e of1-3% is ma i ntainedin th e roastmix and a l u mina isext rac ted  to g e th er with alkal i meta lchromat e i n the p rod uct  li quo rwith prov isions m ad efo rrem ovalo f the al um ina  f rom  thep roduct  liqu or.U. S. Pat . No. 1 , 63 1 , 170an dBrit ish  P at. N o. 1 , 057 ,678 di sclose pr oce s seswh er ein lim e-free roasti ng  of chromi um  or es isc a rried ou t in the presence of so d a ash a ndwhere in l eaching o f t he res ult i ng pro duct i s car ri edo u t und e r  a cid ic  condition s .  So diumal umin ate isproduced in both p r oce sses and comp lic ated s ep ara t io n  st ep s  ar e required to pre vent extra ct i on  of alumin a  in to  the pr oduct c hroma t e solut ions.
All  of these  p rior a rtprocessesindicate  that var i ous t e ch nique s h ave be en  us ed so  as to con ductthe ro as ting o perat io n underconditions to minimizemateri al co sts  and stil l r e cov er good y ield s of the d esi red  alka lim etalchro m at e.T he pr oces s  of the p r es ent i nv ention meet s t hes e obj ect i ves. 1 . Fi eld of the Presen t  Description
T he p r e sen t d e scri pt ion relates to  me th o d s and sy st em for moun ting obj ec t s topolyme ric me mbranes . 2. Descri ptio n o f Related  Ar tV ariousap pl i cation s ex is t in w hich a poly m e ric membrane may  be p l a ced o v era sur fa ce. For exam ple, it ma y be desira ble to  pro videa polym er ic mem bra ne  as a roof i ng materi al. T hat is,  a  pol yme ric me mbra n e  maybe a pp lie d to an o u t er su rf a ceof a  buil di ng s tructure, such asa r o of, topr ote c t  the
 stage_roast, are_used to roast the_chrome ore._U.S._Pat. No._2,199,929_discloses a continuous_countercurrent leaching step_in a lime-free double_roast but it_describes_no procedure to prevent extraction of alumina into the leach liquor. Also, U.S. Pat._No._1,752,863 discloses_a_method_for the roasting of chromium_ores in the presence of_soda ash_and lime with subsequent leaching of the products_but_wherein a portion_of the leaching residue may be used to replace_some of the lime in the_initial step. A_similar_process_may be found in_U.S. Pat. No. 3,812,234 wherein recycle_treatment residue is considered to be_an equivalent diluent to dolomite, iron ore_and the like, in the roasting_of chromium ores with soda_ash, but_in this patent, the chromium-containing_material is initially_heated under_fluidizing conditions with_specific preheating and fluidizing procedures required_for good recovery_of products.
U.S. Pat. No. 3,819,800 discloses_a_lime-containing roasting process_wherein_a_small amount_of lime in_the_range of_1-3%_is maintained in the roast mix_and_alumina is extracted together with alkali metal_chromate in the product_liquor_with provisions made for_removal of the alumina from_the product liquor. U.S. Pat. No._1,631,170 and_British Pat._No. 1,057,678 disclose processes wherein lime-free roasting of chromium ores is_carried out in the presence of_soda ash and wherein_leaching of_the_resulting product is_carried_out under_acidic conditions. Sodium aluminate is produced in_both processes_and complicated separation steps are required_to prevent extraction of_alumina_into the product chromate solutions.
All of_these prior art processes indicate that_various techniques have been used_so_as_to conduct the roasting operation_under conditions to minimize material costs_and still recover_good yields of the desired alkali metal_chromate._The process of the present invention_meets_these objectives. 1. Field of the_Present_Description
The_present description relates to methods_and system for mounting objects to_polymeric membranes.
2. Description of Related Art
Various applications exist in_which a polymeric_membrane may be placed over_a_surface._For example, it may be desirable to provide a polymeric_membrane as_a roofing material._That is, a polymeric membrane may be applied to an_outer surface of a building structure, such_as a roof, to protect the