608-71-9Relevant articles and documents
Preparation method of tris(pentabromophenoxy)isocyanurate
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Paragraph 0025; 0027; 0028; 0034; 0040; 0046; 0052, (2019/01/07)
The invention relates to a preparation method of tris(pentabromophenoxy)isocyanurate. The preparation method is capable of solving technical problems in the prior art that the synthesis method is complex, the cost is high, and it is not beneficial for industrialized production. The preparation method comprises following steps: 1, preparation of a sodium pentabromophenol aqueous solution, wherein phenol is added into an organic solvent, a catalyst I is added, reaction temperature is controlled to be 0 to 5 DEG C, a brominating agent is added dropwise, thermal insulation reaction is carried outso as to obtain the sodium pentabromophenol aqueous solution; 2, preparation of tris(pentabromophenoxy)isocyanurate, wherein water and a catalyst II are introduced into a reaction container, the watertemperature is controlled to be 0 to 5 DEG C, cyanuric chloride is added, the sodium pentabromophenol aqueous solution prepared in step 1 is added dropwise, heating backflow reaction is carried out,cooling to room temperature is carried out so as to obtain tris(pentabromophenoxy)isocyanurate white powder. The preparation method is widely used in the field of fire retardant synthesis.
Rapid, photocatalytic, and deep debromination of polybrominated diphenyl ethers on Pd-TiO2: Intermediates and pathways
Li, Lina,Chang, Wei,Wang, Ying,Ji, Hongwei,Chen, Chuncheng,Ma, Wanhong,Zhao, Jincai
, p. 11163 - 11170,8 (2015/02/02)
Titanium dioxide with surface-loaded palladium (Pd-TiO2) was able to easily remove all ten bromine atoms from decabromodiphenyl ether (BDE209) within 1 h under the irradiation of sunlight or an artificial light source. By contrast, fewer than three bromine atoms were eliminated on the pristine TiO2 even with prolonged irradiation (5 h). During the photocatalytic debromination, moreover, the formed BDE intermediates exhibited a significant difference between the Pd-TiO2 and pristine TiO 2 systems, and much less position selectivity for the debromination on Pd-TiO2 was observed than that on the pristine TiO2 surface. For another polybrominated diphenyl ether (BDE15), pristine TiO 2 was incapable of its photocatalytic reduction, whereas the loading of Pd enabled its debromination to diphenyl ether within 20 min. In addition, an evident induction period appeared in the photocatalytic debromination of BDE15 on Pd-TiO2. The experiments imply that the Pd-cocatalyzed effect changes significantly the photocatalytic reductive debromination pathways.
Products of reaction between tetrabromo-substituted ortho- and para-hydroxybenzoic acids and sodium nitrite in CH3COOH
Fadin,Tarasova,Vasin,Shishkin
, p. 1062 - 1070 (2013/01/15)
The reaction of 2,3,5,6-tetrabromo-4-hydroxybenzoic acid with a 10-fold excess of NaNO2 in the glacial acetic acid at 20°C affords tetrabromonitrosophenols whose further transformations under the reaction conditions leads to the formation of a mixture of 2,4,5,6-tetrabromo-p-quinone diazide and tetrabromo-p- and -o-nitrophenols in the molar ratio 37 : 2 : 1. Under similar conditions the 3,4,5,6-tetrabromo-2-hydroxybenzoic acid is converted into a mixture of 3,4,5,6-tetrabromo-o-quinone diazide with the same nitrophenols in the ratio 13 : 1 : 3. The reaction of sodium 2,3,5,6-tetrabromo-4-hydroxy-benzoate with NaNO2 in dilute acetic acid resulted in a quantitative yield of tetrabromo-p-quinone monooxime. Pleiades Publishing, Ltd., 2012.
PERBROMINATION OF BENZENE AND SOME OF ITS DERIVATIVES
Golounin, A. V.,Shukhta, T. K.,Kirienko, E. K.,Petrova, M. P.,Esavkin, E. V.
, p. 1167 - 1169 (2007/10/02)
Perbrominated compounds - pentabromophenol, hexabromobenzene, pentabromotoluene, polychlorobromobenzenes, and decabromodiphenyl ether - have been obtained.Substitution bromination has been discovered in treating diphenyl sulfoxide, diphenyl sulfide, diphenylmethane, diphenyl oxide, and benzophenone with excess bromine in the presence of AlBr3.A series of ethers and esters of pentabromophenol have been obtained; their hydrolysis has been carried out.A negative influence of ferric halides has been discovered in exhaustive bromination of aromatic compounds.
Dichloro (acetic or propionic) acid aryl ester flame retardants
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, (2008/06/13)
The present disclosure relates to novel compounds of the formula: STR1 where Y is a hydrogen atom or a metal group and p=1 or 2, and when p=1, STR2 n=2, 3, 4 or 5 and n+r≤5 and when p=2, STR3 m=2, 3 or 4 and m+s≤4 and q=0 or 1, where R represents a lower alkyl group containing 1 to 3 carbon atoms, and when q=1, A has the meaning of a substituted or unsubstituted alkylidene group containing 1 to 3 carbon atoms, SO2, S or O; fire retardant polymer compositions in which these compounds are incorporated, and shaped articles that are entirely or partly made up of such fire retardant polymer compositions.
Novel halogenated compounds and fire retardant polymer compositions in which these compounds are incorporated
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, (2008/06/13)
The present disclosure relates to novel compounds of the formula: where Y has the meaning of a methyl group or hydrogen atom and p = 1 or 2, and q = 0 or 1, where R represents a lower alkyl group containing 1 to 3 carbon atoms, and when q = 1, A has the meaning of a substituted or unsub-stituted alkylidene group containing 1 to 3 carbon atoms, SO2, S or O; fire retardant polymer compositions in which these compounds are incorporated, and shaped articles that are entirely or partly made up of such fire retardant polymer compositions.
Process for the isolation of pentabromophenol
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, (2008/06/13)
A process for isolating crude pentabromophenol containing occluded bromine and hydrogen bromide as impurities comprising the steps of contacting the crude pentabromophenol with a strong acid such as hydrobromic acid, sulfuric acid, hydrochloric acid and phosphoric acid; heating the mixture in order to remove excess bromine; and recovering of the pentabromophenol, whereby formation of carbonyl-group-containing impurities during isolation is minimized.
Process for the complete bromination of non-fused ring aromatic compounds
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, (2008/06/13)
There is disclosed a process for the preparation of completely brominated derivatives of aromatic compounds comprising one or more phenyl groups which may contain substituents, side chains or be partially-brominated. The complete bromination is effected by utilizing liquid bromine as a reaction solvent whereby the starting aromatic material is reacted with an excess of bromine which contains a bromination catalyst and the mixture is refluxed for a sufficient time. Use of these brominated derivatives as fire retarding agents is nylon and polyester is also disclosed.
