AT35669B - Process for the preparation of formaldehyde sulfoxylate. - Google Patents

Process for the preparation of formaldehyde sulfoxylate.

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Publication number
AT35669B
AT35669B AT35669DA AT35669B AT 35669 B AT35669 B AT 35669B AT 35669D A AT35669D A AT 35669DA AT 35669 B AT35669 B AT 35669B
Authority
AT
Austria
Prior art keywords
preparation
formaldehyde
formaldehyde sulfoxylate
sulfoxylate
zinc
Prior art date
Application number
Other languages
German (de)
Original Assignee
Basf Ag
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
Priority claimed from DE1905194052D external-priority patent/DE194052C/de
Application filed by Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT35669B publication Critical patent/AT35669B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von Formaldehydsulfoxylat. 



   Zur Darstellung von Formaldehydsulfoxylat hat man bisher die sauren Salze der   schuftigen   Säure bezw. letztere selbst in Gegenwart von Formaldehyd (oder neutrale Alkalisulfite in Gegenwart von Formaldehyde, wodurch gleichfalls Formaldehydalkalibisulfite entstehen) der reduzierenden Einwirkung von Zinkstaub mit   oder ohne Zusatz von Mineral-   säuren oder anderen geeigneten Zusätzen unterworfen. 



   Es hat sich nun gezeigt, dass auch das neutrale Zinksulfit und das neutrale Ammoniumsulfit einer   Umsetzung   mit Zinkstaub und Formaldehyd unter Bildung von formaldehyd- 
 EMI1.1 
 unter   starkem Rühren   etwa 1 Stunde auf 1000. Das verdampfende Wasser wird immer wieder ersetzt. Man erhält so ein schwerlösliches basisches Formaldehydzinksulfoxylat, das sich auf die übliche Weise in Formaldehydnatriumsulfoxylat überführen lässt. 
 EMI1.2 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of formaldehyde sulfoxylate.



   For the preparation of formaldehyde sulfoxylate, the acidic salts of sloppy acid have been used so far. the latter even in the presence of formaldehyde (or neutral alkali metal sulfites in the presence of formaldehyde, which also produces formaldehyde alkali metal disulfites) are subjected to the reducing action of zinc dust with or without the addition of mineral acids or other suitable additives.



   It has now been shown that the neutral zinc sulfite and the neutral ammonium sulfite react with zinc dust and formaldehyde with the formation of formaldehyde
 EMI1.1
 with vigorous stirring for about 1 hour to 1000. The evaporating water is constantly replaced. A sparingly soluble basic formaldehyde zinc sulfoxylate is obtained in this way, which can be converted into formaldehyde sodium sulfoxylate in the usual way.
 EMI1.2
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Formaldehydsulfoxylat, darin bestehend, dass man Zink- EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of formaldehyde sulfoxylate, consisting in the fact that zinc EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT35669D 1905-08-18 1908-01-27 Process for the preparation of formaldehyde sulfoxylate. AT35669B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905194052D DE194052C (en) 1905-08-18

Publications (1)

Publication Number Publication Date
AT35669B true AT35669B (en) 1908-12-28

Family

ID=5742340

Family Applications (1)

Application Number Title Priority Date Filing Date
AT35669D AT35669B (en) 1905-08-18 1908-01-27 Process for the preparation of formaldehyde sulfoxylate.

Country Status (1)

Country Link
AT (1) AT35669B (en)

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