DE905134C - Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths - Google Patents

Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths

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Publication number
DE905134C
DE905134C DEC5620A DEC0005620A DE905134C DE 905134 C DE905134 C DE 905134C DE C5620 A DEC5620 A DE C5620A DE C0005620 A DEC0005620 A DE C0005620A DE 905134 C DE905134 C DE 905134C
Authority
DE
Germany
Prior art keywords
liquid
durable
production
poorly soluble
rare earths
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
DEC5620A
Other languages
German (de)
Inventor
Otto Boser
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.)
Chemische Fabrik Von Heyden AG
Original Assignee
Chemische Fabrik Von Heyden 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
Application filed by Chemische Fabrik Von Heyden AG filed Critical Chemische Fabrik Von Heyden AG
Priority to DEC5620A priority Critical patent/DE905134C/en
Application granted granted Critical
Publication of DE905134C publication Critical patent/DE905134C/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J35/00—Fuel tanks specially adapted for motorcycles or engine-assisted cycles; Arrangements thereof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Verfahren zur Herstellung von hochkonzentrierten, haltbaren, flüssigen, kolloiden Lösungen von schwer löslichen Oxalaten der seltenen Erden Wenn man gemäß Patentschriften 62'i 309 und 622 16o unter Berücksichtigung der Patentschrift 728 893 kolloide Lösungen von schwer löslichen Oxalaten der seltenen Erden herstellt, erzielt man ein Sol mit einem Gehalt von 12 bis 14% Oxyd. Durch die nun folgernde sorgfältige Dialyse gegen Wasser nimmt das Sol so viel Wasser auf, daß seine Konzentration auf ein Drittel absinkt. Diese geringe Konzentration ist nicht befriedigend bei der vorgesehenen Medikation, z. B. in Suppositorien, für die eine hochkonzentrierte, nach flüssige Lösung erforderlich ist. Ein Eindampfen des Sods ohne Schutzkolloid ist nicht ohne Veränderung des Kolloids möglich.Process for the production of highly concentrated, long-life, liquid, colloidal solutions of poorly soluble oxalates of the rare earths If one according to Patent specifications 62'i 309 and 622 16o taking into account patent specification 728 893 produces colloidal solutions of poorly soluble oxalates of the rare earths, a sol with an oxide content of 12 to 14% is obtained. Through the now inferring careful dialysis against water, the sol absorbs so much water that its concentration drops to a third. This low concentration is not satisfactory at the intended medication, e.g. B. in suppositories for which a highly concentrated, after liquid solution is required. Evaporation of the soda without protective colloid is not possible without changing the colloid.

Es: wurde nun gefunden, daß man. durch die Anwendung von hochwirksamen Zentrifugen die Kolloidteilchen stark zusammendrängen kann, so. daß sie als klares Gel gewonnen wenden können, das bis zu 35010 Oxyd als Oxalat enthält. Dieses salbenartige Gel läßt sich zwar mit wenig Wasser verdünnen., jedoch nicht zu einer relativ,dünnfüs,sigen Form, in der noch :2o bis 25 % Oxyd als Oxalat enthalten ist. Diesen Übelstand kann man vermeiden, .indem man statt Wasser 2- bis 6wertige Alkohole zusetzt und so die gewünschte flüssige Konzentration erzielt. Be.ispie1 5 Teile frisch gefälltes, noch feuchtes Ceriterdenoxalat werden mit i Teil Wasser, o,o6 Teilen Natriumcitrat und o,12 Teilen 20%iger Natronlauge 5 X 24 Stunden lang unter Ausschaltung der Luftkohlensäure gemäß. Patentschrift 728,893 vermahlen. . ,Das Produkt wird rasch zentrifugiert. Man erhält eine 12 bis 1q.0/0 Ceritoxyd in, hochkolloider Form als Ceriterdenoxalat enthaltende Lösung. Diese Lösung wird -in Zellglasschläuchen dialysiert. Die kolloide Lösung wird nun in einer hochwirksamen Zentrifuge bei 40 000 Umdr./Min. so, lange behandelt, bis, sich ein durchsichtiges Gel mit einem etwa 350f0 Ceritoxyd als Oxalat enthaltenden Kolloid abtrennen läßt. Dieses wird mit so viel Äthylenglyko.l oder Glycerin oder Butandiol oder konzentrierter Sorbitlösung versetzt, bis eine Verdünnun;g erreicht ist, die vorzugsweise für die gewünschte Medikation geeignet ist.It: has now been found that one. through the use of highly efficient centrifuges, the colloid particles can be squeezed together, so. that they can be turned as a clear gel which contains up to 35010 oxide as oxalate. This ointment-like gel can be diluted with a little water, but not to a relatively thin-footed, sigen form in which: 20 to 25% oxide is contained as oxalate. This disadvantage can be avoided by adding 2- to 6-valent alcohols instead of water and thus achieving the desired liquid concentration. Be.ispie1 5 parts of freshly precipitated, still moist ceriterdenoxalate are mixed with 1 part of water, o, o6 parts of sodium citrate and o, 12 parts of 20% sodium hydroxide solution for 5 x 24 hours with elimination of the air carbonic acid according to. Grind U.S. Patent 728,893. . , The product is centrifuged rapidly. A solution containing 12 to 1q. This solution is dialyzed in cell glass tubes. The colloidal solution is now in a highly effective centrifuge at 40,000 rev / min. Treated so long until a transparent gel with a colloid containing about 350 f0 cerite oxide as oxalate can be separated. This is mixed with enough ethylene glycol or glycerine or butanediol or concentrated sorbitol solution until a dilution is reached that is preferably suitable for the desired medication.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von hochkonzentrierten, haltbaren, flüssigen, kolloiden Lösungen von schwer löslichen Oxalaten der seltenen Erden,durch Aufarbeitung eines frisch gefällten Oxalats, der seltenen Erderz nach den Verfahren der Patentschriften 621 3o9, 622160 und 728 893, dadurch gekennzeichnet, daß man das erhaltene Dialysat mit Hilfe einer hochwirksamen Zentrifuge zentrifugiert und das -dabei gebildete klare Gel mit geringen Mengen von 2- bis 6wertigen Alkoholen versetzt.PATENT CLAIM: Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates of the rare earths, by processing a freshly precipitated oxalate, the rare earth ore according to the processes of patents 621 309, 622160 and 728 893, characterized in that one the dialysate obtained is centrifuged with the aid of a highly effective centrifuge and small amounts of 2- to 6-valent alcohols are added to the clear gel that is formed.
DEC5620A 1952-04-02 1952-04-02 Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths Expired DE905134C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC5620A DE905134C (en) 1952-04-02 1952-04-02 Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC5620A DE905134C (en) 1952-04-02 1952-04-02 Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths

Publications (1)

Publication Number Publication Date
DE905134C true DE905134C (en) 1954-02-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEC5620A Expired DE905134C (en) 1952-04-02 1952-04-02 Process for the production of highly concentrated, durable, liquid, colloidal solutions of poorly soluble oxalates from rare earths

Country Status (1)

Country Link
DE (1) DE905134C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052956B (en) * 1956-12-06 1959-03-19 Phil Dr Techn Kurt Peters Dipl Process for the separation and purification of insoluble or sparingly soluble oxalate-forming elements, especially rare earths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052956B (en) * 1956-12-06 1959-03-19 Phil Dr Techn Kurt Peters Dipl Process for the separation and purification of insoluble or sparingly soluble oxalate-forming elements, especially rare earths

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