- Deamination process of O-phenylenediamine mother liquor
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The invention discloses a deamination process of O-phenylenediamine mother liquor, and belongs to the technical field of production of O-phenylenediamine. The deamination process comprises the following steps: firstly, heat exchange of the ortho-phenylenediamine mother liquor through a heat exchanger. After step two, nitrogen is introduced into the deamination tank 5 - 8min, a heat O-phenylenediamine mother liquor is added, the fan is opened, the nitrogen gas flow takes away ammonia gas, and the O-phenylenediamine mother liquor is discharged from the outlet of the mother liquor. Step II, Step I and Step II were repeated until the concentration ≤ 3g/L of ammonia in the ortho-phenylenediamine mother liquor was found to complete the deamination of o-phenylenediamine mother liquor. By the arrangement of the heat exchanger and the deamination tank, the O-phenylenediamine mother liquor can be deamination repeatedly, and the ammonia gas can be removed more fully and thoroughly under the action of ammonia gas and a fan.
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Paragraph 0049-0051; 0054-0056
(2021/11/19)
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- Regioselective ring opening of [(perfluoroalkyl)methyl] oxiranes with N-nucleophiles
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The reactions of C8F17CH2CHCH2O with some primary and secondary aliphatic amines affording selective ring opening at Cβ are reported. The reactions with secondary amines HNR1R2 (R1 = R2 = Et; R1 = But, R2 = CH2CH2O(CO)C(CH 3)CH2; R1 = Et, R2 = CH 2CH2OH; R1 = R2 = CH 2CH2OH) gave the corresponding C8F 17CH2CH(OH)CH2NR1R2 derivatives. For R1 = Et, R2 = CH2CH 2OH; R1 = R2 = CH2CH2OH, the reactions proceed through the selective nucleophilic attack of the NH moiety with no evidence of reactivity of the OH group. The reactions with the primary amines, allylamine and n-hexamethylenediamine, gave different products depending on reaction conditions.
- Conte,Maniero,Zaggia,Bertani,Gambaretto,Berton,Seraglia
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p. 1274 - 1280
(2007/10/03)
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A new synthesis of perfluoroalkylmethyloxiranes and perfluoroalkylmethylaziridines is accomplished by addition of allylalcohol or allylamine to iodoperfluoroalkanes in the presence of potassium or sodium hydroxide.
- Rubio,Blancou,Commeyras
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- Fluorine-containing polyfunctional (meth) acrylate composition low refractivity material and reflection reducing film
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PCT No. PCT/JP97/01952 Sec. 371 Date Feb. 9, 1998 Sec. 102(e) Date Feb. 9, 1998 PCT Filed Jun. 9, 1997 PCT Pub. No. WO97/47585 PCT Pub. Date Dec. 18, 1997Fluorine-containing polyfunctional (meth)acrylate represented by the formula (1), as well as a composition, a low refractivity material and a reflection reducing film in which the (meth)acrylate is utilized: wherein X stands for a fluoroalkyl group of C1-14 having 3 or more F, or a fluorocycloalkyl group of C3-14 having 4 or more F; Y1, Y2, and Y3 stand for H, an acryloyl group or a methacryloyl group, and at least two of Y1, Y2, and Y3 stand for an acryloyl group or a methacryloyl group; Z stands for H or an alkyl group of C1-3; and n and m is an integer of 0 or 1, and n+m=1.
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- Highly selective synthesis of [(perfluoroalkyl)methyl]oxiranes (by the addition of iodoperfluoroalkanes to allyl acetate)
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Mixtures of regioisomeric adducts of monoiodoperfluoroalkanes RF-I (RF = C4F9, C6F13, C8F17) with allyl acetate, RFCH2CHICH2OAc (1a-1c) and rearranged adducts RFCH2CH(OAc)-CH2I (2a-2c), were converted chemoselectively to the corresponding oxiranes RFCH2CH(-O-)CH2 (3a-3c) in yields of 94-96% (total yields of the two-step synthesis starting from RF-I were 85-87%). The chemoselectivity of the oxirane formation appeared to be very dependent on the solvent used. Dependence on the reaction conditions on formation of byproducts RFCH=CHCH2OAc (4a-4c) and RFCH=CHCH2OH (5a-5c) in the epoxidation reaction was studied.
- Cirkva, Vladimir,Ameduri, Bruno,Boutevin, Bernard,Paleta, Oldrich
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p. 151 - 158
(2007/10/03)
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- Synthesis and polymerization of novel fluorinated morpholino acrylates and methacrylates
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The synthesis of four fluorinated acrylates and methacrylates bearing a morpholino group in the lateral chain was achieved in four steps in very high yield: the radical addition of perfluoroalkyl iodides on to allyl acetate followed by an alkaline cyclization led to fluorinated epoxides.These compounds reacted with an excess of morpholine and yielded morpholinofluorinated alcohols that, condensed with acrylic or methacrylic anhydride, produced the expected fluorinated acrylic or methacrylic monomers, respectively.The behaviour in homopolymerization of such new olefins involved the study of the square of the propagation rate constant to the termination rate constant ratio (k2p/kte) by two different methods.The poor reactivity of these monomers has been shown by a GC kinetic study and also by the calculation of the yield.The values of k2p/kte show that they are two-hundred-times less reactive than usual fluorinated acrylic monomers.We finally propose a reactivity scale for such fluorinated monomers. - Keywords: Monoaddition; Acrylic derivatives; Kinetics; Morpholinofluorinated compounds; NMR spectroscopy; Mass spectrometry
- Guyot, Bernard,Ameduri, Bruno,Boutevin, Bernard
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p. 233 - 240
(2007/10/03)
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- Addition of RFI (CnF2n+1I; n = 4, 6, 8) to allyl alcohol catalyzed by zinc in different solvents: application to the synthesis of F-alkyl epoxypropanes
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The addition of RFI to allyl alcohol catalyzed by zinc in different solvents has been studied.The adduct RFCH2CHICH2OH readily gives the corresponding F-alkyl epoxypropane.
- Laurent, Philippe,Blancou, Hubert,Commeyras, Auguste
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p. 125 - 128
(2007/10/02)
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- Transition-Metal Complex Catalyzed Polyfluoroalkylation. A Facile Synthesis of Fluorine-Containing Oxiranes and Enynes
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Palladium-catalyzed reaction of polyfluoroalkyl halides with allylic alcohols in the presence of potassium carbonate gives polyfluoroalkylmethyl-substituted oxiranes directly.Perfluoroalkyl-substituted enynes can be also prepared from perfluoroalkyl iodides and terminal alkynes under similar conditions.
- Fuchikami, Takamasa,Shibata, Yoshiko,Urata, Hisao
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p. 521 - 524
(2007/10/02)
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- REACTIONS OF RfI(Ph)OSO2CF3 WITH ALKENES AND ALKADIENES
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A successful cationic perfluoroalkylation of alkenes and alkadienes with RfI(Ph)OSO2CF3 was described.The reactivity of RfI(Ph)OSO3H was also examined.
- Umemoto, Teruo,Kuriu, Yuriko,Nakayama, Shin-ichi
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p. 1169 - 1172
(2007/10/02)
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