DE398105C - Process for the production of sodium decaborate - Google Patents

Process for the production of sodium decaborate

Info

Publication number
DE398105C
DE398105C DESCH56584D DESC056584D DE398105C DE 398105 C DE398105 C DE 398105C DE SCH56584 D DESCH56584 D DE SCH56584D DE SC056584 D DESC056584 D DE SC056584D DE 398105 C DE398105 C DE 398105C
Authority
DE
Germany
Prior art keywords
production
boric acid
sulfuric acid
decaborate
sodium
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DESCH56584D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Jenaer Glaswerk Schott and Gen
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 Jenaer Glaswerk Schott and Gen filed Critical Jenaer Glaswerk Schott and Gen
Priority to DESCH56584D priority Critical patent/DE398105C/en
Application granted granted Critical
Publication of DE398105C publication Critical patent/DE398105C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/06—Boron halogen compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C01B35/12—Borates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Natriumdekaborat. Die vorliegende Erfindung betrifft ein Verfahren zur Aufschließung von Boronatrokalzit (südamerikanischem Borkalk). Die bisher angewendeten Verfahren zur Aufschließung dieses Stoffes in größerem Maßstube, nämlich einerseits die Behandlung mit Sodalösung zur Boraxgewinnung und anderseits die Behandlung mit reichlicher Menge. von Sch@vefelsäure oder von Salzsäure zur Gewinnung von kristallisierter Borsäure, sind verhältnismäßig unbequem und langwierig; außerdem ergibt bei der Anwendung des zweiten Verfahrens das in dem Ausgangsstoff enthaltene Alkali nur. das verhältnismäßig wenig wertvolle schwefelsaure Natron. In all diesen Beziehungen hat sich das neue Verfahren als überlegen gezeigt.Process for the production of sodium decaborate. The present invention relates to a process for the digestion of boron atrocalcite (South American Borkalk). The processes used to date to break down this substance in larger scale, namely on the one hand the treatment with soda solution for borax extraction and on the other hand, treatment with copious amounts. of sch @ vefelsäure or of Hydrochloric acid for obtaining crystallized boric acid are relatively inconvenient and tedious; in addition, when using the second method, the in alkali contained in the starting material only. the relatively little valuable sulfuric acid Baking soda. The new process has proven to be superior in all of these respects.

Nach der Erfindung wird das Boronatrokalzit zusammen mit einer nur so großen Menge entweder von Wasser und Schwefelsäure öder von dünner Lauge (z. B. verdünnter wässriger Borsäurelauge von 5 bis 6° Be) und Schwefelsäure versetzt,, däß keine saure Reaktion erfolgt, und bis auf ungefähr 75° erhitzt. Es scheidet sich .dadurch ein Schlamm ab, der aus Kalziumsulfat und unangegriffenem Borkallc besteht, während in der von diesem Schlamm leicht zu trennenden Lauge einerseits Na20 # 5 B20 # 1o, H20 (Natriurndekaborat) (vgl. G m e 1 i n - K r a u t, Handbuch der anorganischen Chemie, 7. Aufl., II, 1, S. q.21) . und anderseits etwas freie Borsäure enthalten ist. Dieses Salz und die Borsäure kann man leicht voneinander trennen, indem man das Salz durch Eindampfen und durch Behandlung im Kaltrührwerk zum Ausscheiden bringt. Versetzt man den obenerwähnten Schlamm mit dünner Borsäurelauge und so viel Schwefelsäure, daß saure Reaktion erfolgt, so besteht der Rückstand nur noch aus Kalziumsulfatschlamm, der von der Borsäurelauge durch Filtern und Auswaschen bis zur neutralen Reaktion getrennt werden kann. Die Borsäure kann man durch das Kaltrührwerk aus der Borsäurelauge ausscheiden. Das durch das vorliegende Verfahren gewinnbare Natriumdekaborat ist ein verhältnismäßig viertvoller Stoff, z. B. für die Herstellung von Eisenemaille; auch steht nichts im Wege, aus diesem Salz Borax zu gewinnen.According to the invention, the boronatrocalcite is used together with only one such a large amount either of water and sulfuric acid or of thin lye (e.g. B. dilute aqueous boric acid solution of 5 to 6 ° Be) and sulfuric acid added, that no acidic reaction takes place, and heated to about 75 °. It part As a result, a sludge consisting of calcium sulphate and unaffected Borkallc exists, while on the one hand in the alkali which is easy to separate from this sludge Na20 # 5 B20 # 1o, H20 (Natriurndekaborat) (see G m e 1 i n - K r a u t, manual of inorganic chemistry, 7th edition, II, 1, p. q.21). and on the other hand something free Boric acid is included. This salt and boric acid can easily be separated from one another Separate by removing the salt by evaporation and by treating in a cold agitator to be eliminated. The above-mentioned sludge is mixed with a thin boric acid solution and so much sulfuric acid that an acid reaction takes place, the residue exists only from calcium sulphate sludge, that of the boric acid lye through filtering and washing out can be separated to a neutral reaction. Boric acid can be obtained through the Separate the cold agitator from the boric acid solution. That through the present process recoverable sodium decaborate is a comparatively fourth full substance, e.g. B. for the manufacture of iron enamel; Nothing stands in the way of borax from this salt to win.

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Herstellung von Natriumdekaborat, .dadurch gekennzeichnet, daß Boronatrokalzit mit einer so großen Menge entweder von Wasser und Schwefelsäure oder von dünner Lauge (z. B. Borsäurelauge) und Schwefelsäure versetzt wird, daß keine saure Reaktion erfolgt, und bis auf ungefähr 750 erhitzt wird.. ,PATENT CLAIM: Process for the production of sodium decaborate, characterized in that boronatrocalcite is mixed with such a large amount of either water and sulfuric acid or of thin alkali (e.g. boric acid) and sulfuric acid that no acidic reaction occurs, and up to heated to around 750 ..,
DESCH56584D 1919-10-25 1919-10-25 Process for the production of sodium decaborate Expired DE398105C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH56584D DE398105C (en) 1919-10-25 1919-10-25 Process for the production of sodium decaborate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH56584D DE398105C (en) 1919-10-25 1919-10-25 Process for the production of sodium decaborate

Publications (1)

Publication Number Publication Date
DE398105C true DE398105C (en) 1924-07-02

Family

ID=7436882

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH56584D Expired DE398105C (en) 1919-10-25 1919-10-25 Process for the production of sodium decaborate

Country Status (1)

Country Link
DE (1) DE398105C (en)

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