DE824199C - Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent - Google Patents

Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent

Info

Publication number
DE824199C
DE824199C DEP13880A DEP0013880A DE824199C DE 824199 C DE824199 C DE 824199C DE P13880 A DEP13880 A DE P13880A DE P0013880 A DEP0013880 A DE P0013880A DE 824199 C DE824199 C DE 824199C
Authority
DE
Germany
Prior art keywords
hydroxide
production
copper oxide
particularly suitable
pest repellent
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
DEP13880A
Other languages
German (de)
Inventor
Dr Kaspar Pfaff
Dr Arthur Voigt
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst 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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Priority to DEP13880A priority Critical patent/DE824199C/en
Application granted granted Critical
Publication of DE824199C publication Critical patent/DE824199C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G3/00Compounds of copper
    • C01G3/02Oxides; Hydroxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Fertilizers (AREA)

Description

Verfahren zur Herstellung eines insbesondere als Schädlingsbekämpfungsmittel geeigneten Kupferoxyds oder -hydroxyds Von einem für Sch<idlingsbekämpfungszwecke geeigneten Kupferoxyd oder -hydroxyd wird eine besonders feine Verteilung oder, was dasselbe ist, eine hervorragende Schwebefähigkeit in flüssigen Medien verlangt.Process for the production of a product, in particular as a pesticide Suitable copper oxide or hydroxide From one for pest control purposes suitable copper oxide or hydroxide is a particularly fine distribution or, which is the same, requires an excellent ability to float in liquid media.

Eingehende Versuche haben ergeben, daß man ein diesen Anforderungen vollauf Genüge leistendes Produkt erhält, das auch für andere Zwecke verwendbar ist, wenn man Kupfernitratlösungen bei Temperaturen von über etwa 8o"C, beispielsweise bei 95° C, mit feinstgeschlämmter Kalkmilch, z. B. solcher mit 15 bis 20°/o Ca (OH)z, unter intensiver Durchmischung, die man z. B. durch Rühren erzielt, langsam fällt und das Produkt möglichst nitratfrei auswäscht. Je langsamer die Fällung erfolgt und je intensiver dabei durchmischt wird, um so besser wird das Produkt bezüglich seiner Schwebefähigkeit. Man kann sowohl die Kalkmilch als auch die Kupfernitratlösung vorlegen.Extensive tests have shown that one can meet these requirements a fully satisfactory product that can also be used for other purposes is when using copper nitrate solutions at temperatures above about 8o "C, for example at 95 ° C, with finely slurried milk of lime, e.g. B. those with 15 to 20% Ca (OH) z, with intensive mixing, which you z. B. achieved by stirring, slowly falls and washes the product as free of nitrates as possible. The slower the precipitation takes place and the more intensely it is mixed, the better the product becomes in terms of it its ability to float. You can use both the milk of lime and the copper nitrate solution submit.

Es hat sich als besonders vorteilhaft erwiesen, wenn man bei der Durchführung des Verfahrens in Calciumnitratlaugen gelöstes Kupfernitrat verwendet. Ferner kann man die Arbeitsweise besonders günstig gestalten und insbesondere auch die Wirtschaftlichkeit des Verfahrens erhöhen, wenn man die bei dem Prozeß anfallenden Calciumnitiatlaugen eindampft und auf Festsalze verarbeitet.It has been found to be particularly beneficial when one is performing the process uses copper nitrate dissolved in calcium nitrate liquors. Furthermore can the way of working is designed to be particularly favorable and, in particular, the economy of the process if one uses the calcium nitrate liquors obtained in the process evaporated and processed on solid salts.

Zweckmäßig kann man zur Erhöhung der Lagerfähigkeit des Produktes nach sorgfältigem Auswaschen desselben und nach Anteigen mit geeigneten Stoffen, wie z. B. Zellpechlauge, noch eine Trocknung bei etwa zo5° C anschließen, die man zweckmäßig auf einer Walze vornimmt.It is useful to increase the shelf life of the product after careful washing of the same and after pasting with suitable substances, how z. B. cell pitch lye, followed by drying at about zo5 ° C, which is expedient makes on a roller.

Beispiel 28oo ccm einer feinstgeschlämmten Kalkmilch, die etwa 6oo g Ca(OH)p suspendiert enthält, werden auf etwa 95° C erhitzt. In die intensiv gerührte Lauge läßt man unter Beibehaltung dieser Temperatur allmählich 4000 ccm einer Lösung einlaufen, die 2000 g Cu(N03)$ 3 H,0 gelöst enthält. Nach Beendigung der Fällung wird abgenutscht und nitratfrei gewaschen. Der etwa 50°/o Wasser enthaltende Filterkuchen wird mit 20°/° (auf sein Trockengewicht berechnet) einer etwa 5o°/°igen Zellpechlauge angeteigt und dann bei io5° C auf einer Walze getrocknet.Example 28oo ccm of a finely slurried milk of lime, which is about 600 g of Ca (OH) p in suspension are heated to about 95 ° C. Into the intensely stirred Lye is gradually allowed to 4000 cc of a solution while maintaining this temperature containing 2000 g Cu (N03) $ 3 H, 0 dissolved. After the precipitation is complete is sucked off and washed free of nitrates. The filter cake containing about 50% water is at 20 ° / ° (calculated on its dry weight) of an approximately 5o ° / ° cell pitch liquor made into a paste and then dried on a roller at 10 ° C.

Bei der Prüfung der Schwebefähigkeit lag der Rückstand einer o,5°/°igen Aufschwemmung nach io Minuten unte: 15% und nach 30 Minuten unter 17°/".When testing the ability to float, the residue was 0.5% Suspension after 10 minutes below: 15% and after 30 minutes below 17 ° / ".

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung eines insbesondere als Schädlingsbekämpfungsmittel geeigneten Kupferoxyds oder -hydroxyds, dadurch gekennzeichnet, daß man Kupfernitratlösungen bei Temperaturen von über etwa 8o0 C, beispielsweise bei 95'C, mit feinstgeschlämmter Kalkmilch unter intensiver Durchmischung, beispielsweise durch Rühren, langsam fällt, das erhaltene P:odukt möglichst nitratfrei auswäscht und zweckmäßig dasselbe nach Anteigen mit geeigneten Stoffen, wie z. B. Zellpechlauge, bei etwa io5° C t:ocknet. PATENT CLAIMS: i. Process for the production of a copper oxide or hydroxide particularly suitable as a pesticide, characterized in that copper nitrate solutions are slowly precipitated at temperatures of over about 80 ° C., for example at 95 ° C., with finely slurried milk of lime with intensive mixing, for example by stirring : Wash out the product as free of nitrates as possible and, expediently, do the same after pasting with suitable substances, such as B. Cell pitch liquor, at about 10 5 ° C t: ocknet. 2. `'erfahren gemäß Anspruch i, dadurch gekennzeichnet, daß man in Calci:imnitratlaugen gelöstes Kupfernitrat verwendet. 2. '' experienced according to Claim i, characterized in that copper nitrate dissolved in calcium hydroxide solutions is used used. 3. Verfahren gemäß Anspruch 2, dadurch gekennzeichnet, daß man die bei dem P.oz,-ß anfallenden Calciumnitratlaugen eindampft und auf Festsalze verarbeitet.3. The method according to claim 2, characterized in that the at The calcium nitrate liquors that occur in the P.oz, -ß evaporated and processed on solid salts.
DEP13880A 1948-10-02 1948-10-02 Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent Expired DE824199C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP13880A DE824199C (en) 1948-10-02 1948-10-02 Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP13880A DE824199C (en) 1948-10-02 1948-10-02 Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent

Publications (1)

Publication Number Publication Date
DE824199C true DE824199C (en) 1951-12-10

Family

ID=7364855

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP13880A Expired DE824199C (en) 1948-10-02 1948-10-02 Process for the production of a copper oxide or hydroxide which is particularly suitable as a pest repellent

Country Status (1)

Country Link
DE (1) DE824199C (en)

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