13472-08-7Relevant articles and documents
Oxidation of alkylcyanohydrazines to azo-bis nitriles using Oxone-potassium bromide in aqueous medium
Tamhankar,Desai, Uday V.,Mane,Kulkarni,Wadgaonkar
, p. 3643 - 3646 (2002)
Azo-bis nitriles were prepared in good yields and high purity by oxidation of corresponding 1,2-bis-dialkylcyano hydrazines using oxone-potassium bromide in aqueous medium.
METHOD FOR PRODUCING AZO COMPOUNDS
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Paragraph 0048; 0062, (2018/05/03)
PROBLEM TO BE SOLVED: To provide a method that can produce azo compounds at good yields by making oxygen or an oxygen-containing gas act on hydrazo groups of hydrazo compounds when oxidatively dehydrogenating them. SOLUTION: Azo compounds are produced by making oxygen or an oxygen-containing gas act on hydrazo compounds in the presence of vanadium or cerium compounds, and a solvent. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPOandINPIT
Azobisisobutyronitrile preparation method
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Paragraph 0022, (2019/01/08)
The present invention relates to an azobisisobutyronitrile preparation method, which comprises: carrying out a reaction on sodium hypochlorite, ammonia and acetone to prepare an acetone azine synthesis solution; purifying to obtain acetone azine with a mass content of not less than 90%; reacting with hydrogen cyanide to obtain hydrogenated azobisisobutyronitrile; and oxidizing with chlorine gas orhydrogen peroxide to obtain an azobisisobutyronitrile solution. Compared to the conventional process, the method of the present invention can simplify the production process, shorten the production cycle, and reduce the consumption of steam and circulating water so as to increase the yield of azobisisobutyronitrile and reduce the production cost.
AEROGELS, CALCINED AND CRYSTALLINE ARTICLES AND METHODS OF MAKING THE SAME
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, (2017/08/26)
Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).
FLUORINATED ETHER URETHANES AND METHODS OF USING THE SAME
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, (2011/10/12)
Compounds comprising end groups represented by formula (Rf-Q)a-X-(A-)b and compounds comprising the reaction product of components comprising a multifunctional isocyanate compound and a fluorinated compound represented by formula (Rf-Q)a-X—(Z)b. Each Rf is independently a partially fluorinated or fully fluorinated group selected from RfA(O)2CHL′-(CF2)n—; [RfB—(O)1—C(L)H—CF2—O]m—W—; CF3CFH—O—(CF2)p—; CF3—(O—CF2)Z—; and CF3—O—(CF2)3—O—CF—. Methods of making an article having a surface using the fluorinated compounds and treated articles are also disclosed.
Oxidation of 1,2-bis (cyanoalkyl) hydrazines to azobisnitriles using trichloroisocyanuric acid
Mohite,Desai, Uday V.,Pore,Mane,Wadgaonkar
, p. 645 - 646 (2007/10/03)
Azobisnitriles were synthesised in excellent yields by oxidation of the corresponding 1, 2-bis (cyanoalkyl) hydrazines using trichloroisocyanuric acid in acetonitrile medium at room temperature.
Granules of azo-type compounds
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, (2008/06/13)
A composition, comprising an azo compound in the form of granules having a diameter size of between 200 μm and 10 mm, the cumulative pore volume of said granules being between about 0.2 and about 2 ml per gram of composition. A process for preparing the composition is also provided, which comprises providing a wetted powder comprising the azo compound, effecting granulation by passing the wetted powder under mechanical stress, through a die, and then drying the granules so obtained at a temperature of at or less than about 45° C.
Hydrosilylation of unsaturated compounds
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, (2008/06/13)
A method for hydrosilylating an olefinically unsaturated compound comprising contacting the unsaturated compound with a source of silicon in the presence of an azo-containing free-radical catalyst, the hydrosilylated product being a useful crosslinking agent.
Process for the preparation of aliphatic azo compounds using an amine coupling
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, (2008/06/13)
There is described a process for the production of a compound of formula I, STR1 in which at least one each of R1, R2 and R3, and of R4, R5 and R6, represents an electron withdrawing group, or one of R1, R2 and R3 together with one of R4, R5 and R6 form a --CO-- group, and the remainder of R1, R2, R3, R4, R5 and R6, which may be the same or different, each represent an electron withdrawing group, alkyl, cycloalkyl, phenyl or phenylalkyl, or R1 and R2, or R4 and R5 , and R1 and R4, may together form a --(CH2)n --chain, in which n is a whole number up to 5, the alkyl, cycloalkyl, phenyl or phenylalkyl group or the --(CH2)n --chain optionally being substituted, which comprises reacting a compound of formula II, STR2 in which R1 a, R2 a and R3 a have the same significances as R1, R2, and R3 above, and some additional significances, with a compound of formula III, STR3 in which R4 a, R5 a and R6 a have the same significances as R4, R5 and R6 above, and some additional significances, the reaction being carried out in an aqueous medium in the presence of a base and a surfactant.
