38565-53-6Relevant articles and documents
Deamination process of O-phenylenediamine mother liquor
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Paragraph 0049-0051; 0054-0056, (2021/11/19)
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.
Fluorine-containing polyfunctional (meth) acrylate composition low refractivity material and reflection reducing film
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, (2008/06/13)
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.
Highly selective synthesis of [(perfluoroalkyl)methyl]oxiranes (by the addition of iodoperfluoroalkanes to allyl acetate)
Cirkva, Vladimir,Ameduri, Bruno,Boutevin, Bernard,Paleta, Oldrich
, p. 151 - 158 (2007/10/03)
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.