CAS: 98-44-2; 2-Aminobenzene-1,4-Disulfonic Acid

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CAS号17691-19-9 4-氯-3-硝基苯磺酸钠 | CAS号7757-83-7 无水亚硫酸钠 | CAS号121-47-1 3-氨基苯磺酸 | CAS号121-47-1 3-氨基苯磺酸 | CAS号69774-80-7 2-[(4-amino-7-s... | CAS号893-39-0 2,5-dichloro-N-... | CAS号5857-93-2 2-amino-4-hydro...

3-氨基苯磺酸置于硫酸体系中,化学反应生成 2-氨基-1,4-苯二磺酸
参考文献:Zander,Justus Liebigs Annalen Der Chemie,1879,Vol. 198,P. 10
标题:Zander,Justus Liebigs Annalen Der Chemie,1879,Vol. 198,P. 10

专利信息

专利号:US-5189206-A
优先权日:1989-03-16
标题 :Process for the preparation of aminobenzenesulfonic acids
发明人：HERZIG PAUL
权利人:CIBA GEIGY CORP
摘要:There is disclosed a process for the preparation of compounds of formula ##STR1## wherein the symbols are as defined in claim 1, which process comprises dissolving a compound of formula ##STR2## in sulfuric acid, adding this solution to oleum and reacting the mixture in the temperature range from 10° to 80° C. until a sulfo group has been completely introduced, and, in an optional further step, subjecting the reaction mixture to further reaction in the temperature range from 100° to 200° C. to introduce a second sulfo group. n The compounds of formula (1) obtainable by this process are useful intermediates for the synthesis of dyes and are particularly suitable diazo components for the synthesis of azo dyes.

专利号:US-4719053-A
优先权日:1980-08-01
标题 :Beta-chloroethylsulfonylmethyl-benzoic halides as intermediates
发明人：SCHLAEFER LUDWIG; HAEHNLE REINHARD
权利人:HOECHST AG
摘要:New beta -chloroethylsuflonylmethyl-benzoic acid halides which can serve as fibre-reactive anchors for thesynthesis of novel organic, water-soluble compounds, preferably dyestuffs, having fibre-reactive and fibre-finishing properties, such as preferably dyestuff properties, and containing, as a fibre-reactive group, one or two beta -chloroethylsufonylmethylbenzoic acid amide groups. For the synthesis of these novel fibre-finishing compounds, said new beta -chloroethylsulfonylmethyl-benzoic acid halide compounds are reacted with an organic, water-soluble compound having fibre-finishing properties and continuing one or two amino groups. Also precursors of the fibre-finishing, fibre-reactive compounds, containing said beta -chloroethylsulfonylmethyl-benzxoic acid amid grouping, can be employed for their synthesis. The novel fibre-finishing compounds can be applied onto suitable fibre materials, such as especially cellulose fibre material and natural or synthetic polyamide fibre materials, and fixed on these fibre materials in a manner similar to application and fixation methods usual in the technique for fibre-reactive compounds. The fibre-finished material, such as dyed material, shows very good wet fastnesses.

专利号:US-4118384-A
优先权日:1976-02-21
标题 :Process for preparation of azo dyestuffs by coupling in presence of aromatic sulphonic acid-formaldehyde reaction product
发明人：MOLLS HANS-HEINZ; SCHIWY WILLY; HORNLE REINHOLD; NEBELING REINHARD
权利人:BAYER AG
摘要:Dyestuff dispersions and dyestuff solutions free from salt or at least having a low salt content are obtained in that the diazotization is carried out with addition of free dispersing agent acid to which, after the synthesis, either no basic agents are added or basic agents are added only up to a pH value of 3. The disclosed process gives dyestuff compositions of low salt content and results in readily dispersible dyestuffs when water insoluble dyestuffs are prepared and stable solutions when water soluble dyestuffs are prepared. The process is widely applicable and chemical constitution of the dyestuffs is conventional.

专利号:US-4035350-A
优先权日:1975-01-30
标 题:Process for the preparation of water-soluble azo dyestuffs by reacting an aromatic amine and a coupling component with alkali metal nitrite or alkyl nitrite in the absence of acid
发明人：LANDLER JOSEF; WORFEL ERHARD
权利人:HOECHST AG
摘要:A new and very advantageous Process had been found for the preparation of azo dyestuffs by diazotation and coupling in which the synthesis is carried out without the hitherto usual addition of an acid, with the proviso that at least one of the diazo and coupling components contains at least one acid group. Besides the saving of reaction material and subsequently of alkali for neutralization of the reaction medium and isolation of the dyestuff, highly concentrated solutions of the dyestuff and salt-free or practically salt-free dyestuffs can be obtained, and waste-water is no longer charged with big amounts of salts.

专利号:US-9683218-B2
优先权日:2005-11-01
标 题:Bionanomaterials and their synthesis
发明人：WANG QIAN; NIU ZHONGWEI
权利人:UNIV SOUTH CAROLINA
摘要:The use of biomaterials, such as viruses and virus-like particles, to form nanostructures is generally disclosed. For instance, rod-like viruses can be used to form composite nanofibers that are fixed together in a head-to-tail assembly by a polymer. Also, 2-dimensional nanostructures formed from crosslinked viruses assembled in a single, film-like layer are generally disclosed. Porous gels having controllable pore size through the use of virus particles are also disclosed.

专利号:CN-103194091-B
优先权日:2013-04-11
标题:Synthesis and application of a high-performance polyazo brown reactive dye and its mixture