CH122509A - Process for the production of potassium borofluoride. - Google Patents
Process for the production of potassium borofluoride.Info
- Publication number
- CH122509A CH122509A CH122509DA CH122509A CH 122509 A CH122509 A CH 122509A CH 122509D A CH122509D A CH 122509DA CH 122509 A CH122509 A CH 122509A
- Authority
- CH
- Switzerland
- Prior art keywords
- potassium
- production
- acid
- boron
- fluoride
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von Kallumboriluorid. In dem Hauptpatent wurde die Herstellung von Natriumsilikofluorid beschrieben. Nach vorliegendem Verfahren kann man nun in ähnlicher Weise zu Kaliumborfluorid gelangen, welches sich zu ähnlichen chemischen Um setzungen verwenden lässt wie das Natrium silikofluorid, wenn man statt der Natrium salze Kaliumsalze und statt des Siliziumfluorids Borfluorid verwendet.
Gemäss dem vorliegenden Verfahren lässt man also eine einfache borfreie Fluorverbin- dung, Borfluorid und ein Kaliumsalz aufein ander .einwirken.
Wie beim Hauptverfahren dient als ein fache borfreie Fluorverbindung in erster Linie Kalziumfluorid. Es kann aber auch ein anderes Metallfluorid, insbesondere ein anderes Erdalkalifluorid, benutzt werden.
Ferner kann als einfache borfreie Fluor verbindung Flusssäure dienen.
Die Umsetzungen verlaufen nach folgenden Formelbeispielen 2 KCl + 2 BFs -I- CaF2 (Säure) = 2 KBF4 + CaC12 (Säure) KCl -j-- BFs + HF = KBF4 -}- HCI. In der erstgenannten Gleichung deutet die Klammer "Säure" an, dass man unter Umständen in Gegenwart geringer Mengen Säure arbeitet,
wobei die Säure als Kontakt substanz dient. Sie kann selbstverständlich auch gänzlich entbehrt werden.
Das Arbeiten mit Salzsäure ist besonders zweckmässig.
Das Kaliumsalz kann in fester Form ver wendet werden. Unter Umständen empfiehlt es sich, die Umsetzung unter Benutzung von nur wenig zur Lösung nicht ausreichender Flüssigkeitsmengen vorzunehmen.
Beispiel: In ein Gemisch von 167 kg einer Fluss- säurelösung, welche 20 kg HF enthält und 74,5 kg Kaliumchlorid, werden 68 kg Bor- fluorid eingeleitet. Es scheiden sich<B>126</B> kg Kaliumborfluorid ab. DieLösung stellt eine etwa 20 o/oige Salzsäure dar, welche durch Filtrieren von dem Kaliumborfluorid abgetrennt wird.
Process for the preparation of callumboriluoride. The main patent describes the production of sodium fluorosilicate. According to the present process, potassium borofluoride can now be obtained in a similar manner, which can be used for chemical reactions similar to that of sodium silicon fluoride if potassium salts are used instead of sodium salts and boron fluoride is used instead of silicon fluoride.
According to the present process, a simple boron-free fluorine compound, boron fluoride and a potassium salt are allowed to act on one another.
As in the main process, calcium fluoride serves primarily as the simple boron-free fluorine compound. However, a different metal fluoride, in particular a different alkaline earth fluoride, can also be used.
Furthermore, hydrofluoric acid can serve as a simple boron-free fluorine compound.
The reactions proceed according to the following formula examples 2 KCl + 2 BFs -I- CaF2 (acid) = 2 KBF4 + CaC12 (acid) KCl -j-- BFs + HF = KBF4 -} - HCl. In the first-mentioned equation, the brackets "acid" indicate that you may work in the presence of small amounts of acid,
whereby the acid serves as a contact substance. It can of course also be dispensed with entirely.
Working with hydrochloric acid is particularly useful.
The potassium salt can be used in solid form. Under certain circumstances it is advisable to carry out the reaction using only a small amount of liquid that is insufficient to dissolve.
Example: 68 kg of boron fluoride are introduced into a mixture of 167 kg of a hydrofluoric acid solution containing 20 kg of HF and 74.5 kg of potassium chloride. <B> 126 </B> kg of potassium borofluoride are deposited. The solution is about 20% hydrochloric acid, which is separated from the potassium borofluoride by filtration.
Claims (1)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE122509X | 1923-07-30 | ||
DE11023X | 1923-10-01 | ||
DE191023X | 1923-10-19 | ||
DE271023X | 1923-10-27 | ||
DE201223X | 1923-12-20 | ||
CH121560T | 1924-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH122509A true CH122509A (en) | 1927-09-16 |
Family
ID=27543859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH122509D CH122509A (en) | 1923-07-30 | 1924-07-21 | Process for the production of potassium borofluoride. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH122509A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2738255A (en) * | 1954-08-04 | 1956-03-13 | American Agricultural Chem Co | Manufacture of potassium fluoborate |
-
1924
- 1924-07-21 CH CH122509D patent/CH122509A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2738255A (en) * | 1954-08-04 | 1956-03-13 | American Agricultural Chem Co | Manufacture of potassium fluoborate |
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