CH100320A - Process for the production of solid formaldehyde solutions. - Google Patents

Process for the production of solid formaldehyde solutions.

Info

Publication number
CH100320A
CH100320A CH100320DA CH100320A CH 100320 A CH100320 A CH 100320A CH 100320D A CH100320D A CH 100320DA CH 100320 A CH100320 A CH 100320A
Authority
CH
Switzerland
Prior art keywords
formaldehyde
solution
lactic acid
production
acid lime
Prior art date
Application number
Other languages
German (de)
Inventor
Chemische Fabrik Auf Schering
Original Assignee
Chem Fab Vorm E Schering
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Fab Vorm E Schering filed Critical Chem Fab Vorm E Schering
Publication of CH100320A publication Critical patent/CH100320A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

  

  Verfahren zur Herstellung fester     Formaldehydlösungen.       Es wurde die bemerkenswerte Beobach  tung gemacht, dass Lösungen von milchsaurem  Kalk in hervorragendem Masse geeignet sind,  Formaldehyd aufzunehmen, beim Erstarren  festzuhalten und bei Berührung mit Wasser  abzugeben. Man erhält also mit     Hilfe    von  milchsaurem Kalk ein festes Präparat, das  den Formaldehyd in unveränderter, nicht     po-          lymeriserter    Form enthält.  



  Zur Herstellung eines festen Präparates  aus milchsaurem Kalk und Formaldehyd ver  fährt man beispielsweise wie folgt:  In 500     gr        Formaldehydlösung    mit zirka  35 Gewichtsprozent Formaldehyd löst man  etwas mehr als die gleiche Menge, also etwa  600 bis 700 Gramm     gepulverten    milchsauren  Kalk unter     Erwärmen    am     Rückflusskühler.     Die Temperatur soll hierbei<B>90'</B> C möglichst  nicht übersteigen. Man erhält so eine farb  lose, sirupartige Flüssigkeit, die nach mehr  stündigem Stehen in der Kälte zu einer  weissen, harten, kristallinischen Masse er  starrt, die in Wasser leicht löslich ist und  in angewärmtem Wasser den Formaldehyd  leicht abspaltet.

   Der     Formaldehydgehalt       dieser Masse wurde in frischem Zustande zu  etwa 12 % ermittelt.  



  Man kann auch so verfahren, dass man  milchsauren Kalk in einer geringen Menge  warmen Wassers löst und .dann Formaldehyd  einträgt, entweder durch Einleiten von Form  aldehydgas oder vorteilhafter durch Zusatz  einer     wässerigen        Formaldehydlösung,    wonach  man .die Lösung zum Erstarren     bringt.    Man  kann das Eintragen auch in der Wärme vor  nehmen.  



  Das Erzeugnis ist, in verschlossener  Flasche aufbewahrt, gut haltbar und lässt sich  in     gepulvertem    Zustande zu den verschieden  artigsten pharmazeutischen Präparaten ver  arbeiten, so zum Beispiel in Vermischung mit  Milchzucker, Mehl, Kalk und ähnlichem Füll  material zu Tabletten oder Pillen, die als  Desinfiziens Verwendung finden können.



  Process for the production of solid formaldehyde solutions. The remarkable observation was made that solutions of lactic acid lime are excellently suited to absorb formaldehyde, to hold it when it solidifies and to release it when it comes into contact with water. With the help of lactic acid lime, a solid preparation is obtained which contains the formaldehyde in unchanged, non-polymerized form.



  To produce a solid preparation from lactic acid lime and formaldehyde, proceed as follows, for example: In 500 g formaldehyde solution with about 35 percent by weight of formaldehyde, slightly more than the same amount, i.e. about 600 to 700 grams of powdered lactic acid lime, is dissolved by heating on the reflux condenser. The temperature should not exceed <B> 90 '</B> C if possible. The result is a colorless, syrupy liquid which, after standing in the cold for several hours, solidifies into a white, hard, crystalline mass which is easily soluble in water and easily splits off formaldehyde in warmed water.

   The formaldehyde content of this mass was determined to be about 12% in the fresh state.



  One can also proceed in such a way that one dissolves lactic acid lime in a small amount of warm water and then introduces formaldehyde, either by introducing formaldehyde gas or more advantageously by adding an aqueous formaldehyde solution, after which one brings the solution to solidify. You can also do the entry in the warm.



  The product is well-preserved when stored in a sealed bottle and can be processed into a wide variety of pharmaceutical preparations in powdered form, for example when mixed with lactose, flour, lime and similar filling material to make tablets or pills that are used as disinfectants can find.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung fester Formal dehydlösungen, dadurch gekennzeichnet, dass man Formaldehyd und milchsauren Kalk zu sammenbringt. ÜNTERANSPRt?CHE 1. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man den milchsauren Kalk in einer Formaldehydlösung löst und die Lösung zum Erstarren bringt. 2. Verfahren nach Patentanspruch und Un teranspruch 1, dadurch gekennzeichnet, dass man die Lösung des milchsauren Kal kes in der Formaldehydlösung in der Wärme vornimmt. 3. PATENT CLAIM: Process for the production of solid formaldehyde solutions, characterized in that formaldehyde and lactic acid lime are brought together. ÜNTERANSPRt? CHE 1. Process according to claim, characterized in that the lactic acid lime is dissolved in a formaldehyde solution and the solution is made to solidify. 2. The method according to patent claim and un teran claim 1, characterized in that the solution of the lactic acid Kal kes in the formaldehyde solution is carried out in the heat. 3. Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass man den Formal- dehyd in eine Lösung von milchsaurem Kalk einträgt und die Lösung zum Er starren bringt. 4. Verfahren nach Patentanspruch und Un teranspruch 3, dadurch gekennzeichnet, dass man das Eintragen des Formaldehyds in die milchsaure Kalklösung in der Wärme vornimmt. Process according to patent claim, characterized in that the formaldehyde is introduced into a solution of lactic acid lime and the solution is made to freeze. 4. The method according to patent claim and un teran claim 3, characterized in that the formaldehyde is introduced into the lactic acid lime solution in the heat.
CH100320D 1921-12-08 1921-12-08 Process for the production of solid formaldehyde solutions. CH100320A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH100320T 1921-12-08

Publications (1)

Publication Number Publication Date
CH100320A true CH100320A (en) 1923-07-16

Family

ID=4358593

Family Applications (1)

Application Number Title Priority Date Filing Date
CH100320D CH100320A (en) 1921-12-08 1921-12-08 Process for the production of solid formaldehyde solutions.

Country Status (1)

Country Link
CH (1) CH100320A (en)

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