DE586587C - Process for the purification of crude rhodanammonium - Google Patents

Process for the purification of crude rhodanammonium

Info

Publication number
DE586587C
DE586587C DEG82598D DEG0082598D DE586587C DE 586587 C DE586587 C DE 586587C DE G82598 D DEG82598 D DE G82598D DE G0082598 D DEG0082598 D DE G0082598D DE 586587 C DE586587 C DE 586587C
Authority
DE
Germany
Prior art keywords
rhodanammonium
crude
purification
impurities
salt
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
DEG82598D
Other languages
German (de)
Inventor
Dr Wilhelm Gluud
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.)
Gesellschaft fuer Kohlentechnik mbH
Original Assignee
Gesellschaft fuer Kohlentechnik mbH
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 Gesellschaft fuer Kohlentechnik mbH filed Critical Gesellschaft fuer Kohlentechnik mbH
Priority to DEG82598D priority Critical patent/DE586587C/en
Application granted granted Critical
Publication of DE586587C publication Critical patent/DE586587C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/20—Thiocyanic acid; Salts thereof

Landscapes

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

Description

Verfahren zur Reinigung von rohem Rhodanammonium Bei der technischen Herstellung von Rhodanammonium guf Kokereien erfolgt in der Regeleine Behandlung der von groben Verunreinigungen befreiten Rohlauge derart, daß in der Hitze Thiosulfate, lösliche Ferrocyanide usw, nach Möglichkeit in unlösliche, abtrennbare Form übergeführt werden; hierauf wird durch Filtrieren, Separieren, Absitzenlassen !o. dgl. geklärt, durch Eindampfen eine heiße konzentrierte Mutterlauge gewonnen und darauf zur Kristallisation durch Abkühlung gebracht. Das anfallende Rohsalz wird dann -wieder heiß gelöst, umkristallisiert und gilt dann als Reinsalz. Erforderlichenfalls wird die Umkristallisation in gleicher Art wiederholt.Process for the purification of crude rhodanammonium In the technical Production of rhodanammonium in coking plants usually involves a treatment the raw liquor freed from coarse impurities in such a way that thiosulfates, soluble ferrocyanides, etc., if possible converted into insoluble, separable form will; this is followed by filtering, separating, allowing to settle! or the like. like clarified, a hot concentrated mother liquor obtained by evaporation and then to crystallization brought by cooling. The resulting crude salt is then dissolved again hot, recrystallized and is then considered pure salt. If necessary, the recrystallization repeated in the same way.

Dem in der ,angegebenen Weise gewonnenen technisch reimen Rhodanammonium haften stets eisenhaltigie Verunreinigungen sehr hartnäckig an, die das Produkt mißfarben erscheinen lassen und seinen Wert beeinträchtigen. Diese Verunreinigungen lassen sich in heißer Lösung weder durch Filtrieren noch durch Absitzenlassen, Separieren -o. dgl. beseitigen.The technically rhyme rhodanammonium obtained in the manner indicated ferrous impurities always adhere very stubbornly to the product appear discolored and affect its value. These impurities can neither be filtered nor allowed to settle or separate in a hot solution -O. Eliminate the like.

Es wurde nun gefunden, daß, falls das technische Salz .entgegen der wärmewirtschaftlich richtigen und üblichen Arbeitsweise nicht zu einer heißgesättigten Lösung, sondern in der Kälte zu nur kaltgesättigter Lösung veraxbeitet wird, die störenden Verunreinigungen ungelöst zurückbleiben und sich jetzt leicht und vollständig abscheiden lassen, so daß man beim darauffolgenden Eindampfen und Kristallisieren der geklärten Lauge ein Produkt erhält, das von eisenhaltigen Verunreinigungen praktisch vollkommen frei ist.It has now been found that if the technical salt. Contrary to the heat-economically correct and usual way of working does not lead to a hot-saturated one Solution, but is processed in the cold to only cold-saturated solution, which disturbing impurities remain undissolved and are now easily and completely Let it separate out, so that you can with the subsequent evaporation and crystallization the clarified lye receives a product that is practically free of iron-containing impurities is completely free.

Es wurde weiterhin gefunden, daß, falls unter den Verunreinigungen. der Rohlauge größere Mengen von Teerbestamdteilen u. dgl. vorhanden sind, u. U. auch das nach dem oben beschriebenen Verfahren umkristallisierte Rhodanammonium noch eine leichte Verfärbung aufweist, die sich aber nunmehr durch eine zweite Umkristallisation in der allgemein üblichen Weise durch Lösen des Khodanammoxu.ums in der Hitze und Abkühlen der Lösung leicht beseitigen läßt. Das Verfahren hat sich im technischen Betriebe bewährt.It was further found that, if among the impurities. larger amounts of tar constituents and the like are present in the raw liquor, under certain circumstances. also the rhodanammonium recrystallized by the process described above still has a slight discoloration, but this is now due to a second recrystallization in the usual way by dissolving the khodanammoxu.um in the heat and Cooling off of the solution can be easily eliminated. The procedure has become more technical Proven companies.

Claims (1)

PATENTANSPRUCH: Verfahren zum Reinigen von rohem Rlhodanammonium, das auf Kokereien anfällt, durch Umkristallisieren, dadurch gekennzeichnet, daß man unter Verwendung kalten Wassers eine kaltgesättigte Lösung des Salzes herstellt, die festen Verunreinigungen abtrennt, erst dann die Lauge eindampft und zur Kristallisation bringt.PATENT CLAIM: Process for the purification of crude rhodanammonium, obtained in coking plants by recrystallization, characterized in that a cold saturated solution of the salt is prepared using cold water, separates the solid impurities, only then evaporates the lye and allows it to crystallize brings.
DEG82598D 1932-05-08 1932-05-08 Process for the purification of crude rhodanammonium Expired DE586587C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG82598D DE586587C (en) 1932-05-08 1932-05-08 Process for the purification of crude rhodanammonium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG82598D DE586587C (en) 1932-05-08 1932-05-08 Process for the purification of crude rhodanammonium

Publications (1)

Publication Number Publication Date
DE586587C true DE586587C (en) 1933-10-23

Family

ID=7137589

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG82598D Expired DE586587C (en) 1932-05-08 1932-05-08 Process for the purification of crude rhodanammonium

Country Status (1)

Country Link
DE (1) DE586587C (en)

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