US822115A

US822115A - Method of detinning.

Info

Publication number: US822115A
Application number: US26758005A
Authority: US
Inventors: Karl Goldschmidt; Josef Weber
Original assignee: TH Goldschmidt AG
Current assignee: Evonik Operations GmbH
Priority date: 1905-06-29
Filing date: 1905-06-29
Publication date: 1906-05-29
Anticipated expiration: 1923-05-29

Description

PATENTBD MAY 29, IQOB. K, GULDSGHMIDT 8: J'. WEBER.

METHOD OF DETINNING.

APPLIUAYION nun Jqnn2s,19os.

w, m M

U Niiiti) SLHEH RYlliPx-"i ()FFI CF.

METHOD OF DETiNNiNG.

No. 822.1 1 5. Specificaticn of Letters Patent. Patented May 29 1906.

' Application filgd Jun 29,1905, Serial No. 26?.680.

Be it known that \w, KARL (iuwscznmm'r maymuvenientlybu, im' ilisizim-v, ifll'i \('illiiand Josm' 'ii'rzmzn, huth suhjm-Lsnf the King meters tn sixty wmliineiws in width and 55 of irussiu, German Empqrur, and resident: lengthimd eighb in fuum-mi ((Iliilillill's in I 5 iii Esen4nl-t-he-liuhr, in the Prm'ince of the hei ht, s Llmfliiey iltli'f' :1 \Ynigiii {mm iilmuL Rhine, Gunman Enipiriglmvo juintiy infifty tusixtykiiugnuns. In order in hu-ilivented ccrtuinnow and usofui lmpruvememfl mm the filling uf the was-sci ihu pariwis :1 m

n th Mfl lwd ufllvtinning, of \i'hieh {he 01- hmught in baskets if, and time imshvis iilimi 6o lmvingisah' exiict fipecificaiiun, with'thg bundle-s Ui (fUIIEpHSSMi iinsiliips 011i invention consists in suhjecting the are then in'trmhicmi int-u the vvssvl.

tin scraps uin aiwmpwssed state tn the aatim After the apparatus a has hvvn fiiivd wii h (if chhmn in iiillllbinltiflllMitil ananhydruus the bundles of tin scraps an lI!il \'(|IUllS ihiid in ,ig thicl i gth,"rhloringas .mayhc in a fluid-fnr exampie, ihiid (hiurid uf fin -is '65 giissr'iivedmt-zite Bythe term inert anhybrought intu the apparatus. 'ihun chim'in I5 di'nus fluid in-thc description and thei'uigas is admitted in thv fluid chinrid of tin and iujwing(:laimswemman ananhydmus fluid is dissuived in it As snun as 'the dissnivcd winch dnes not. attack the scm ur chiurin or chlurin gas comes in uuntact with the sin-- th'e pruducts thereufdurmg thepruccss of (16- faces 01' the tin scraps fluid Uiiifllifi (if tin IS itilmingi- Tetrahloridhf tin may housed as formed, and new chlurin gas must he admitsu'ch an anhydrous fluid ,hut it is pussible to ted to the rccept'm-iu, which is first dissolved- 3I s was between the cmnpressed tin scraps, so prchsetiand weihlricd bund employ another anhydmus iluigl in which thiin the (shim-id of (in and than is brought in chiorin gasis'finely dhitrihutad.- i 7 reaction with Hi0. tin sump: Aha-tin: dci A chief pointof our inventinn is tusubmit; tinning has been finished thv china-id 'r f tiz'alis. the tin sqrapsiin Efirmiy-cdm ressegl state to drawn out of'the receptacle, and bhe detiii'iied 5 the action of thednix'turc 0 an anhydrous scraps may be washed uft'er the last partici'uns fluid cont'aininghr having dissolved ehiorin of nhlorid iii in and of chlurin gas have been gas. 'Now byeiperiments it has been found reimwcd out of the I'((.{!I)i.tl(!i('-. iout ihat the reaction of the chlorintakes In the practice the process goes 0:; as fui- I place ven in the nm'mwcst and firmiyglosed laws: At, first we fill the race tacie with cumivs of tin scraps, it at even on those surfaces of the tin scraps a and than we introduce frum above intn thu suilicient action and detinning can take mcvpt-acie'a certain qiimltit i'of fluid tzhiurid P 80 1 Y 1 '1' tin through the pipe t, m which cilhn'in- 8 ItLis of impnrtancwto avoid in the process gas Sadissolvud. The (.ilifllii! gas eniersthu 3 5.h1'gh temgmrzitures in the amass-ofthe tin rmopLm-icbthrough thepipe ifland the (.3110- scra s and to use the tin scraps in a wellrid of tin comes into the recephwic I) though (irie state; By this process we get the. iron the pipos vi, and c. The fluid chiurid of tin waste perfectiy 'detinned and with a fine combs in contact with the surfaces of thatin" 9o smooth gray surface. swaps, and the chlarin (iissuivad in the fluid 4 The apparatus used in thiyproccss is iilus-nzehlurid of tin acts 113011 the tin of the tin traiedin the iccompanyingdrawinginavrsum s aind chiorid 0 iii! is furnmd. The

ticai cmss-sectiun. i fluii chlurid of tin iiqwS down, and new fluid The receptacle for the cumpressod tin mhiurid of tin, in which (:hhirin gas is dis- 5 scraps is marked a and iguf cmnsmnmhe (if a waived, is led from uhovie intn the runhphwha.

45 matmfial which is not. affected In; chimiu gas 'ihn fluid chlnrid of tin is gathered at tlhc boler anhydrous c-hlm'id of tin. Pr-l'cmhiy an tom of the rm'lcptucle and is iii t r-d by a pump iron vess! is used. The tinscraps are nm- 3; through the'hihus c and c into the rmepim nhaniqully humprvsscui, so that. they form (shah, iniowhich h 't-hv tube 1 uhiurin gas is ICO bundles 8, aml thn rolce male. I; is iiiied with had, so that chim'in is dissolved in the fluid v 5 thaw cognpressed huh 10s s'of tin scraps. chlorid of tin. This fluid chim'id of: (in, in

The bundles pm compressed, preferfahiy, in which phhn'ih gas is dissnivud, is hruught such a #120. that they tan afterward be'dianew through the who iirum ahuvo nto thu actI n fem-ed the easily-accessible parts of the tin scraps with one another might easily remain unaffectedwhut by alteringthe pressure or by ingreat importance for finishin the dctinning process completely and in a s ort time.

.110 increati'e it again.

receptacle (1, end the reaction of the chlorin begins anew. The process may be altered in that manner that at first the receptacle (1 is perfectly filled with fluid chlorid of tin or that at first a certain qurnlity of chlorin gas is admitted into the receptacle; but the chief point is always to use during the process the reaction of un anhydrous fluid in combination with chloriu on the compressed bundles of the tin scraps alone or in combination with chlorin gas.

Another point in this process is of importancethat is, to alter the pressure in the closed vesselduring the recess. By altering the pressure it is possi le to secure a complete and quick reaction even between the most closelyacked surfaces of the tin scraps, and it is of a vantagc to guide the process in such manner that the pressure in the vessel is so augmented that at the end of the operation the overpressure is, for instan'ce,'one at mosphere above the ordinary pressure.

If in the beginning of the process the reacting agents come in close-,contact with thev surfaces of the bundles of the tin scra s, the reacting agent when passing over the 1rmlvcompressed bundles will naturally be eagerly taken up by the tin on account of its great aifinit forfthe chlorin; but as soon as the cluei action of the chlorin has taken place at the reaction will slow down. so the parts of the tin scraps winch are firmly compressed and whose surfaces are m closest. contact.

creasifigthe same the reacting agent is dri you into the nnrrowest channeis' or interstices of the tin scfhps, so that the whole surfaces are detinuedf r It is'aily tobe seen that the altering or increasing of the pressure in the vessel is of In- Stead of increasing the )rcssi'lre in the vessel it is possible to dnninis l the same and then It is important to avoid a gretit increase of temperature during the proee's. For this purpose the anhydrot'ts fluid is of value, for it may be the bearer of a s mall uantity of reagents, and the produc hea't'is'tmnsand distributed over thewhole fl'i id.

It is of great ii'nportancc to use. the tin scraps in a stronglv-compressed state, which can, of course, be eil'ectcd bya pressing operation or by blows. Then it is possible to pack the tin scraps in strong bundles of fifty to siikty kilograms, for instance, into baskets or crates, so that the vessel in which the process is carried out contains several tons of tin Scraps. Thereby the cost of labor, which is an essential fact'pr in all such processes, is greatly reduced.

The stronger th'et'in scraps have been com- As already said, the pressure may be decreased or increased in the process; but always a varyingof the pressure must take place. By the term inert gas" used in the description and in the following claims we mean a gas which does not attack the scrap'or chlorin or the products thereof during the process of detinning.

Having thus fully described the nature of our invention, what we desire to secure by Letters Patent of the United States is l. Proccssof detinning, which consists in compressing loose tin-scrap, and treating said compressed scrap in a vessel, with an inert anhydrous fluld crt gas and wlth'chlorm gas.

2. Process of detinning which consists in,

compressing loose tin-scrap, and treatingsaid compressed scrap in a vessel with an inert anhydrous fluid containing chlorin, in combination with an inert gas. it

3. Process of detinmng, which consists in compressingloose tin-scrap, and treating said compressed scrap in a vessel with an inert solved in combination with an inert gas.

4. Process of detinuing, which consists in compressing loose tin-scrap, and treating said compressed scrap 1n avesscl with an inert anhydrous thud in which ClIlOIll'l gas is dis- "solvcd and with chlorin gas, in combination 'with an inert gas.

5. Process of detinning, which consists in compressing loose tin-scrap, and treating said compressed scrapt n a vessel with an inert anhydrous fluid and wlth-chlorin gas and altering the pressure in the vessel during the dctinning. 1

6. Process of dctin 'ng, which consists in compressing loose tin-. crap, and treating said compressed scrap in a vessel with an inert.

anhydrous iluid containing chlorin and alteringthc pressure in the vessel during the detinning.

7. Process of detinning, which consists in compressing loose tin-scrap, and treating said compressed scra in a vessel with an inert anhydrous fluid m which chlorin gas is dis-'- solved and altering the pressure in the vessel the detinnin in combination with an induring v v p '8. roccss of detinmng, wh cheonsists in compressm g loose tln-scrap, and treating said compressed scra in' a vessel with an inert anhydrous fluid in which chloiin gas is fdissolvcdand with chlorin gas and altering the pressure in the vessel during the detinning.

9. Process of dctinning, which consistgifi cmnpressin" loose tin-scrap, and treating 'hhld compressecl serap in a vessel with an inert anhydrous fluid in which chlorin gas is disdetinning. I

10-. Process of detinnmg, which consists in compressing loose tin-scrap, and treating said compressed scrap m a vessel with an inert anhydrous fluid containing chlorin and increasing the pressure in the vessel during the detinning.

11. Process of detinning, which consists in compressing loose tin-scrap, and treating said compressed sore anhydrous fluid 1n which chlorin gas is dissolved and increasing the pressure in the vessei during the detinning.

12. Process of detinning, which consists in compressing loose tin-scrap, and treating said compressed son. in a vessel with an inert anhydrous fluid m which chlorin gas is dissolved and with chlorin gas and increasing the pressure in the vessel during the dotin- 1%. Process of detinning, which consists in compressing loose tin-scrap, and treating said compressed scrap in a vessel with an inert anhydrous fluid and with chlorin gas, increasing the pressure in the vessel during the process and then diminishing the same,

in a vessel with an inert,

14. rrocess o1 detlnnnig, which consists in compressing loose iin-scrnp, and treating ssid compressed scrap in n vcsscl with an inert. anhydrous fluid containing chlnrin increasing the pressure in the vessel during the process and then diminishing the samc.

15. Process of (lclinning, which gonsists in coinpressing loose tin-scrap, and treating ssid compressed scrap in s vessel with en inert anhydrous fluid, in which chlorin gas is dissolved, increasing the pressure in the vessel during the process and then diminishing the same 16. Process of detinning, which consists in compressing loose tinscrap, and t-rcuting said compressed scrap in s vcssci with an inert. anhydrous fluid in which chlorin gas is dissolved and with chlorin gas, increasing the pressure in the vessel during the process and then diminishing the same.

in witness whereof we have hcrcunto sci; our hands in the presence c two witncsscs.

KARL oo'nnsonn rm. JOSEF' W l lilil lli.

Witnesses W 11.1mm lfisssswnm, Ii. Scnucn-uurr.