File:Polytechnisches journal (1820) (14781767334).jpg

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Identifier: polytechnischesj225stut (find matches)
Title: Polytechnisches journal
Year: 1820 (1820s)
Authors:
Subjects: Technology Industrial arts Engineering
Publisher: Stuttgart : J.G. Cotta'schen Buchhandlung
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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jen, 3^ot)eifen unb f^miebbarem ©ifen eine oom 3Serein jurS3eförberung beS ©etnerbfleifeeS preiSgefrönte längere Slrbeit geliefert,bie in ben SSer^anblungen biefeS 33ereinS, 1877 @. 267 bis 277 ah-gebrucEt ift unb ineld^er Sleferent folgenbeS entnimmt. S)a an eine mafe=analptifd^e ^eftimmung ber ^^olpl^orfäure in einer ©ifenlöfung tüo^lniemals ju benfen ift, fo mirb bie einfac^fte 2lrt ber ^l^oSpl^orbeftimmungba^in ju ftreben ^aben, ba^ nad^ bem Sluflöfen beS ©ifenS unb 2lb=fd^eiten ber unlöSlid^en 33eftanbt^eile burd^ Filtration bie ^^oSp^or^fäure im ^^-iltrat birect in einer folc^en §orm gefällt mirb, öaß bererl^altene 9iieberfd;lag nai^ bem SCrocfnen eine conftante 3nfammenfe^ung^at. 3)ieS ift bisher nur üon @gger^ (1860 158 290. 1875 218492. 1877 223 73) erftrebt tporben, n)ä^renb nad^ ben übrigen 3)ie^tboben bie ^^oSp^orfäure erft auS ber ©ifenlöfung abgef(^ieben unbbann gefällt ioirb. ^a6) Ä 0 r f d^ e 11 leibet baS @gger;fd^e 3Serfa§ren nod^ an einigen
Text Appearing After Image:
SePimmung be8 ^^oSp^or? in (Sifenerjen unb im <Sifen. 161 Uniiollfommenl^citen, bie feine 2lntoenbung in ber S^ed^ni! erfd^weren.2)a§ Slbbampfen ber ©ifenlöfung, bal StrodEnen be§ p^olpl^ormolpbbän--fauren SlmmonS bei 95° finb jeitraubenb, bie 3^^^^ß^iß;^9 ^^^3Rieber(c^lage§ ift nid^t conftant, »eil, irie bereite Sipotoil (^oggen^borffl annalen, 1860 S3b. 109 ©. 135) bemerft, bur^ bie Wmxahfäuren ba§ moipbbänfaure 2lmmon beim 33erbünnen jerlegt unb foein 2;i^eil ber 3)ioIpbbänfäure mit aulgefc^ieben tt)irb. Sipon)i; fe^tjur SSermeibung biefeö Uebelj^anbei SBeinfäure gu unb trocknet ben91ieberfc^lag jur 33ermeibung be§ 2lmmonia!DerIufie0, ber bereits unter100^ eintritt, bei 21 bi§ 30*^ im @yficcator über ©d^tüefelfäure. ^or--fd^elt fäüt nun bie ^^oSpl^orfäure mit einer moipbbänfauren Äali=löfung unb fann ba^er ben erhaltenen Siieberfd^lag bei Temperaturenüber 100* trodfnen. 3ur ^erjleUung biefer 33iol9bbänfäureIöfung »erben 2 SÜ^. ^Diol^bbän-fü

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  • bookid:polytechnischesj225stut
  • bookyear:1820
  • bookdecade:1820
  • bookcentury:1800
  • booksubject:Technology
  • booksubject:Industrial_arts
  • booksubject:Engineering
  • bookpublisher:Stuttgart___J_G__Cotta_schen_Buchhandlung
  • bookcontributor:NCSU_Libraries
  • booksponsor:NCSU_Libraries
  • bookleafnumber:187
  • bookcollection:americana
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30 July 2014
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current20:02, 24 August 2015Thumbnail for version as of 20:02, 24 August 20152,848 × 1,804 (332 KB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
16:47, 23 August 2015Thumbnail for version as of 16:47, 23 August 20151,804 × 2,862 (336 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': polytechnischesj225stut ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Fpolytechnischesj225stut%2F f...

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