CS232350B1 - Processing of 2,2-azobisizobutyrnitrile - Google Patents
Processing of 2,2-azobisizobutyrnitrile Download PDFInfo
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Abstract
Vynález rieši spfisob výroby 2,2 -azobisizobutyronitrilu z hydraz^nu a/alebo jeho adičnýeh zlúčenín cez 2,2 -hydrazoblsizobutyronitril ako medziprodukt, na ktorý sa pfisobí peroxidem vodíka vo vodnom prostředí sa prítoonostl minerálnej kyseliny a/alebo organ^ckej kyseliny a za přítomnosti zlúčenín brrógu tak, že pfisobenie peroxidu vodíka na 2,2 -hy^razobisizobutyronitrll sa katalýzuje aspoň jedným prvkom a/alebo aspoň jednou zlúčenlnou z prvkov molybdén, vanád, volfrám 9 urán pri teplgte 0 až 50 °C, pričom molový poměr 2,2 -hydrazobisizobutyronitrilu ku katalytiekej zložke je 1:0,00.0 1 až 0,1 a vytvořený 2,2 -azoblsizobutyronitril sa izoluje.The invention provides a process for the preparation of 2,2-azobisobutyronitrile from hydrazine and / or its addition compounds via 2,2-hydrazobisisobutyronitrile as an intermediate to which is added with hydrogen peroxide in an aqueous medium the mineral acid is added and / or and in the presence of compounds brroda so that the hydrogen peroxide is added the 2,2-hydroxy-isobutyronitrile is catalysed at least one element and / or at least one compound of molybdenum, vanadium, tungsten 9 uranium at 0 to 50 ° C with a molar ratio of 2,2-hydrazobisisobutyronitrile to the catalytic component is 1: 0.00.0 1 to 0.1 and 2,2-azobisobutyronitrile formed is isolated.
Description
MACHO VENDELÍN prof. ing. DrSe., NOVÁKY, BALÁK JIŘÍ ing. CSc., POLIEVKA MILAN ing. CSc., PRIEVIDZA, LETZ ŠTEFAN ing., ŽILINA (54) Spósob výroby 2,2'-azobisizobutyronštňluMACHO VENDELÍN prof. ing. DrSe., NEWS, BALÁK JIŘÍ ing. CSc., SOUP MILAN ing. CSc., PRIEVIDZA, LETZ ŠTEFAN ing., ŽILINA (54) Production method of 2,2'-azobisisobutyronite
Vynález rieši spfisob výroby 2,2 -azobisizobutyronitrilu z hydraz^nu a/alebo jeho adičnýeh zlúčenín cez 2,2 -hydrazoblsizobutyronitril ako medziprodukt, na ktorý sa pfisobí peroxidem vodíka vo vodnom prostředí sa prítoonostl minerálnej kyseliny a/alebo organ^ckej kyseliny a za přítomnosti zlúčenín brrógu tak, že pfisobenie peroxidu vodíka na 2,2 -hy^razobisizobutyronitrll sa katalýzu je aspoň jedným prvkom a/alebo aspoň jednou zlúčenlnou z prvkov molybdén, vanád, volfrám 9 urán pri teplgte 0 až 50 °C, pričom molový poměr 2,2 -hydrazobisizobutyronitrilu ku katalytiekej zložke je 1:0,00.0 1 až 0,1 a vytvořený 2,2 -azoblsizobutyronitril sa izoluje.SUMMARY OF THE INVENTION The present invention provides a process for the preparation of 2,2-azobisisobutyronitrile from hydrazine and / or its addition compounds via 2,2-hydrazobisisobutyronitrile as an intermediate to which it is treated with hydrogen peroxide in an aqueous medium with a mineral acid and / or organic acid. The presence of bromine compounds such that the addition of hydrogen peroxide to 2,2-hydroxybisisobutyronitrile by catalysis is at least one element and / or at least one compound of the elements molybdenum, vanadium, tungsten 9 uranium at a temperature of 0 to 50 ° C, the molar ratio 2 The 2-hydrazobisisobutyronitrile to the catalyst component is 1: 0.00.0 1 to 0.1 and the 2,2-azoblsisobutyronitrile formed is isolated.
23235C23235C
- 2 232350- 2 232350
Vynález sa týká sposobu výroby 2,2-azobisizobutyronitrilu /AZDN/, ktorý je vhodným iniciátorom polymerizačných reakcii.The present invention relates to a process for the preparation of 2,2-azobisisobutyronitrile (AZDN) which is a suitable initiator of polymerization reactions.
Vynález popisuje sposob výroby AZDN cez 2,2-hydrazobisizobutyronitril /HAZDN/, jeho oxidáciou vo vodnéj suspenzii, za přítomnosti silnéj kyseliny a bróm obsahujůcej zlúčeniny, peroxidom vodíka za přítomnosti zlúčenín molybdénu, wolfrámu, vanádu, kobaltu, uránu samotných alebo ich zmesí.The present invention provides a process for producing AZDN via 2,2-hydrazobisisobutyronitrile (HAZDN) by oxidizing it in an aqueous suspension in the presence of a strong acid and a bromine-containing compound with hydrogen peroxide in the presence of molybdenum, tungsten, vanadium, cobalt, uranium alone or mixtures thereof.
Výroba AZDN oxidáciou HAZDN plynným chlórom je znáipg, má však niektoré nevýhody. Ekologicky je náročná aj oxidácia solami chrómu Cr , hlavně pre ich vlastnost' pósobit'toxicky /napr. kožné ekzémy/.The production of AZDN by oxidation of HAZDN with chlorine gas is described, but has some disadvantages. The oxidation of Cr salts with chromium is also environmentally demanding, mainly because of their toxic / toxic properties. skin eczema.
Známe oxidovadlo je peroxid vodíka. Oxidácia HAZDN sa uskutočňuje v jeho vodnej suspenzii a za přítomnosti zlúčenín brómu, jódu, silnej kyseliny a katalytického posobenia kysličníka seleničitého alebo teluričitého /Otsuka Chem.The known oxidant is hydrogen peroxide. Oxidation of HAZDN is carried out in its aqueous suspension and in the presence of bromine, iodine, strong acid and catalytic impregnation of selenium or tellurium / Otsuka Chem.
Co. Ltd.: Jap. Kokai 77, 144 622/.What. Ltd.: Jap. Kokai 77,144,622].
Podlá tohoto vynálezu sa sposob výroby 2,2-azobisizobutyronitrilu z hydrazínu a /alebo jeho adičnýeh zlúčenín cez 2,2-hydrazobisizobutyronitril ako medziprodukt, na ktorý sa posobí peroxidom vodíka vo vodnom prostředí za přítomnosti minerálnej kyseliny a/alebo organickej kyseliny a za přítomnosti zlúčenín brómu uskutočňuje tak, že posobenie peroxidu vodíka na 2,2-hydrazobisizobutyronitril sa katalyzuje aspoň jedným prvkom a/alebo aspoň jednou zlúčeninou z prvkov molybden, vanad, wolfram, urán, pri teplote 0 až 50°C, s výhodou 20 až 35°C, pričom molový poměr 2,2-hydrazobisizobutyronitrilu ku katalytickéj zložke je 1 : 0,0001 až 0,1 a vytvořený 2,2-azobisizobutyronitril sa izoluje.According to the present invention, there is provided a process for producing 2,2-azobisisobutyronitrile from hydrazine and / or its addition compounds via 2,2-hydrazobisisobutyronitrile as an intermediate to which it is treated with hydrogen peroxide in an aqueous medium in the presence of a mineral acid and / or organic acid and compounds. of bromine is carried out by catalyzing the hydrogen peroxide to 2,2-hydrazobisisobutyronitrile with at least one element and / or at least one compound of the elements molybdenum, vanadium, tungsten, uranium at a temperature of 0 to 50 ° C, preferably 20 to 35 ° C wherein the molar ratio of 2,2-hydrazobisisobutyronitrile to catalyst component is 1: 0.0001 to 0.1 and the 2,2-azobisisobutyronitrile formed is isolated.
Oxidačný systém sa skládá zo suspendovaného 2,2-hydrazobisizobutyronitrilu vo vodě a obsahuje bróm, kyselinu bromovodíkovú, zlúčeniny brómu ako NaBr, KBr, LiBr, NH^Br alebo iné vodorozpustné zlúčeniny brómu, resp. kvartérne amónium bromidy v mnnožstve 0,1 až 10% hmot., s výhodou 0,1 až 5% hmot. na hydrazoderivát. Katalytické zložky v oxidovanom systéme sú zlúčeniny niektorých prvkov, ktoré majú schopnost urýchlit přenos kyslíka z peroxidu a sprostredkovaťhladkú premenu hydrazoderivátu na azoderivát. Bez přítomnosti kovových katalyzátorov reakcia prebieha pomaly, výsledkom sú nižšie výňažky produktu, zvýšenie spotřeby energie a doby oxidácie. Molový poměr oxidovaného medziproduktu 2,2-hydrazobisizobutyronitrilu ku katalytickej zložke je 1 : 0,0001 až 0,1. U kovového katalyzátora ktorý prenáša kyslík, třeba chápat uvedený molový poměr ako atomový. Katalyticky účinné zložky sa možu aplikovat ako kysličníky, soli /amóniové, alkalické/ a komplexy, kde sú použité ligandy aminolátky. Výhodná je ich rozpustnost''/ reakčnom prostředí. Příslušný komplex možno připravit*a aplikovat'ako čistú látku samostatné, hlavně ak sa vyrába, alebo komplex připravit v reakčnom prostředí in sítu přidáním aminoligandov do reakčného prostredia ku príslušnej soli použitého katalyzátora /Mo, W, V a ich zmesi/. Účinné tiež sú heteropolyfosforečnany molybdénu a vanádu. Z používaných aminoligandov sú výhodné aminoalkoholy, alifatické aminy, pyridinové bázy, ako aj aromatické aminy. Vlastným donorom kyslíka pri oxidácii je peroxid vodíka, ktorý možno použit'o koncentrácii 20 až 60% hmot. a kvoli dosiahnutiu optimálnych výtážkov produktu je ho výhodné dávkovat 's 1,05 až 1,5 molárnym nadbytkov vzhladom na 2,2-hydrazobisizobutyronitril Výhodou použitia peroxidu vodíka je jeho selektívnost'posobenia, vedlajší produkt jeho oxidačného posobenia je voda a jeho použitie je pro výrobný podnik atraktivně aj z ekologických aspektov. Vzhladom na stabilitu vznikajáceho produktu je možno pri oxdácii pracovat pri teplote 0 až 50°C, avšak vzhladom na praktická aplikáciu postupu vo výrobě je výhodné pracovat pri teplote 20 až 35 ’C.The oxidation system consists of suspended 2,2-hydrazobisisobutyronitrile in water and contains bromine, hydrobromic acid, bromine compounds such as NaBr, KBr, LiBr, NH 4 Br or other water-soluble bromine compounds, respectively. quaternary ammonium bromides in an amount of 0.1 to 10% by weight, preferably 0.1 to 5% by weight; to the hydrazo derivative. Catalyst components in an oxidized system are compounds of some elements which have the ability to accelerate the transfer of oxygen from the peroxide and mediate the smooth conversion of the hydrazo derivative to the azo derivative. In the absence of metal catalysts, the reaction proceeds slowly, resulting in lower product yields, increased energy consumption and oxidation time. The molar ratio of the oxidized 2,2-hydrazobisisobutyronitrile intermediate to the catalyst component is 1: 0.0001 to 0.1. In the case of a metal catalyst which carries oxygen, the molar ratio mentioned should be understood as atomic. The catalytically active ingredients can be applied as oxides, salts (ammonium, alkaline) and complexes where amino reagent ligands are used. Their solubility / reaction medium is preferred. The respective complex can be prepared and applied as a pure substance separately, especially if it is produced, or the complex prepared in situ in the reaction medium by adding aminoligands to the reaction medium to the corresponding salt of the catalyst used (Mo, W, V and mixtures thereof). Molybdenum and vanadium heteropolyphosphates are also effective. Of the aminoligands used, aminoalcohols, aliphatic amines, pyridine bases as well as aromatic amines are preferred. The actual oxygen donor in the oxidation is hydrogen peroxide, which can be used at a concentration of 20 to 60% by weight. and in order to achieve optimum product yields, it is advantageous to dispense it with 1.05 to 1.5 molar excesses relative to 2,2-hydrazobisisobutyronitrile. environmentally friendly. Due to the stability of the product formed, the oxidation can be carried out at a temperature of 0 to 50 ° C, but in view of the practical application of the manufacturing process, it is preferable to operate at a temperature of 20 to 35 ° C.
Východisková surovina pre syntézu acetónkyánhydrínu sa připravuje známým postupom z acetonu a kyanovodík®. Predmetom tohte vynálezu je katalytická oxidácia 2,2'-hydrazobi*i-The starting material for the synthesis of acetone cyanohydrin is prepared by a known method from acetone and hydrogen cyanide. The subject of the present invention is the catalytic oxidation of 2,2'-hydrazobio-i-
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CS836484A CS232350B1 (en) | 1983-09-07 | 1983-09-07 | Processing of 2,2-azobisizobutyrnitrile |
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CS836484A CS232350B1 (en) | 1983-09-07 | 1983-09-07 | Processing of 2,2-azobisizobutyrnitrile |
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CS232350B1 true CS232350B1 (en) | 1985-01-16 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2821393A1 (en) | 2013-07-02 | 2015-01-07 | Arkema France | Method for the synthesis of azo compounds |
WO2019175510A1 (en) | 2018-03-16 | 2019-09-19 | Arkema France | Process for synthesizing azo compounds |
-
1983
- 1983-09-07 CS CS836484A patent/CS232350B1/en unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2821393A1 (en) | 2013-07-02 | 2015-01-07 | Arkema France | Method for the synthesis of azo compounds |
FR3008092A1 (en) * | 2013-07-02 | 2015-01-09 | Arkema France | PROCESS FOR SYNTHESIZING AZO COMPOUNDS |
CN104276981A (en) * | 2013-07-02 | 2015-01-14 | 阿肯马法国公司 | Method of synthesis of azo compounds |
US9227926B2 (en) | 2013-07-02 | 2016-01-05 | Arkema France | Method of synthesis of azo compounds |
CN104276981B (en) * | 2013-07-02 | 2017-05-31 | 阿肯马法国公司 | The method for synthesizing azo compound |
WO2019175510A1 (en) | 2018-03-16 | 2019-09-19 | Arkema France | Process for synthesizing azo compounds |
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