- Enhanced photo Fenton-like activity by effective and stable Al–Sm M-hexaferrite heterogenous catalyst magnetically detachable for methylene blue degradation
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Nano-compositing technologies are getting enhanced attention due to unique catalytic and separation activity with advanced characteristics for dye wastewater treatment. In this study, novel easily separable Ba–Sr based Al–Sm substituted M-hexaferrites (BASF-NPs) were fabricated as a highly effective heterogenous photo-Fenton-like catalysts via sol-gel route. The analytical techniques were applied to investigate BASF-NPs characteristics such as TGA, XRD, FTIR, XPS, SEM/TEM/EDS, UV–Vis, BET and VSM analysis. The results revealed that all fabricated BASF-NPs showed excellent photo-Fenton-like catalytic performance towards Methylene Blue (MB) degradation. Virtually complete degradation of an initial 10 mg/L MB was achieved under optimal conditions (i.e. 16 mM H2O2 and 0.25 g/L BASF-NPs) within 140 min of UV-irradiated reaction time and followed pseudo-first order reaction kinetic at the rate of 6.514 × 10?2 min?1. Similar degradation trend was noticed at various pH levels (pH 3–12), signifying the efficiency of the NPs at wide pH range. Due to the intrinsic magnetic nature of BASF-NPs, it was readily recoverable by external magnetic field and exposed strong capacity for dye removal treatment. The photo-catalysts retained its performance after four consecutive cycles, indicating robust reusability and excellent stability.
- Ashraf, Ghulam Abbas,Rasool, Raqiqa Tur,Hassan, Muhammad,Zhang, Lanting
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supporting information
(2019/12/30)
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- A reduction of nitro aromatic substituent amino aromatic of substituted method (by machine translation)
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The invention relates to amino aromatic substituted object synthesis technology field, in particular to a process for preparing nitro aromatic substituent amino aromatic of substituted method. The method comprises the following steps, water, catalyst is added to the 1st in the reactor, and the reactor temperature, adding reducing iron, adjusting pH, at the same time added to the 1st nitro aromatic substituent in the reactor, thermal insulation reaction, to obtain a reaction liquid; regulating the reaction liquid of pH, thermal reaction, the addition of a stabilizing agent, containing the amino aromatic of substituted 1st solution and iron oxide black crude; adjusting the pH of the 1st solution, solid-liquid separation, obtained amino aromatic substituent. The present invention provides a process for the production of the method is simple, can be continuously produced, with high operation safety and higher selectivity, the reaction time is short, a yield as high as 90% or more, the product quality is good, the content of 98% or more. (by machine translation)
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Paragraph 0079-0083
(2019/06/13)
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- Sulfonation of arylamines: Part 11 - Preparation and thermal decomposition of ring-substituted arylammonium hydrogen sulfates
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Eight ring-substituted arylammonium hydrogen sulfates (RSAHS) have been prepared by reacting corresponding arylamine with excess of conc. H2SO4. Their thermal decomposition has been investigated by TG and DSC techniques. The decomposition pathways have also been suggested.
- Singh,Kapoor,Singh
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p. 229 - 232
(2007/10/03)
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- Triphendioxazine dyestuffs
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The novel triphendioxazine dyestuffs of the formula STR1 in which the substituents R, R', T1, T2, X, Y and n have the meanings given in the description are highly suitable for the dyeing and printing of cellulose-containing or amido-containing material.
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- Process for the preparation of aminobenzenesulfonic acids
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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. 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.
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- Amino disazo dyestuffs containing a fluoropyrimidinyl or a fluorotriazinyl reactive group
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Dyestuffs of the formula STR1 wherein X=--CH=CH2, --CH2 --CH2 OSO3 H, --CH=CHCl or --CH2 --CH2 Cl and Y=a fiber-reactive fluoropyrimidinyl or fluorotriazine radical and wherein u and v=H or SO3 H, where u~v. Such dyestuffs suitable for dyeing and printing diverse substrates, particularly cotton, to give products a high degree of dyestuff fixation.
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- 2,4-diamino-6-fluorotriazine disazo reactive dyestuffs
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A dyestuff of the formula STR1 in which R is H or Ch3 STR2 in which R1 is H, substituted or unsubstituted C1 -C4 -alkyl or --X--Y X is a divalent aliphatic, cycloaliphatic, aliphaticcycloaliphatic radical or an araliphatic radical Y is COOH, SO3 H, OSO3 H or SO2 G, in which G is CH=CH2 or --CH2 --CH2 --Z, in which Z denotes a group which can be eliminated under alkaline conditions, R2 is H or C1 -C4 -alkyl, and the benzene radical D and the benzene or naphthalene radical L can contain customary substituents, is suitable for the dyeing and printing of OH- and NH-containing materials. They produce lightfast and wetfast brilliant dyeings and prints.
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- Alkanol substituted disazo orange dye for nylon
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The specification describes a new group of alkanol substituted disazo compounds that are useful in dyeing polyamide textile fibers in orange hues. The new compounds are compatible with several acid blue dyes and several acid red dyes that are commercially important as dyes for nylon. The new compounds are particularly well suited for use as the "yellow" component in trichromatic systems for dying polyamide carpeting and other textiles. The new compounds are relatively inexpensive to make and have outstanding application and fastness properties. Other aspects of the specification are concerned with a method of making the new compounds and with a method of dyeing polyamides with said compounds and to the novel dyed polyamides resulting from the use of the new group of compounds as dyes.
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- Reactive dyestuffs comprising a triazine moiety and a vinylsulfonyl moiety both being linked by a substituted alkylene bridge member
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A reactive dye of the formula STR1 in which: F is a radical selected from the group consisting of metal-free or metal-containing monoazo or disazo dyes containing at least one --SO3 H group, anthraquinone dyes, sulfophthalocyanine dyes, formazan dyes, phenazine dyes, oxazine dyes and nitroaryl dyes, R is hydrogen, C1 -C4 alkyl which is unsubstituted or substituted with --COOH or --SO3 H, cyanoethyl, or hydroxyethyl, X is fluorine, chlorine, bromine, --SO3 H, phenylsulfonyl or C1 -C4 -alkylsulfonyl, p is 1 or 2 and A is a radical of the formula STR2 in which: Y is chlorine, bromine, fluorine, --OH, --OSO3 H, --O-acyl, --CN, --COOH, --COO--C1 -C4 -alkyl, --CONH2 or --SO2 --Z, the group designated "alk" is a straight or branched polymethylene radical having 2 to 6 carbon atoms, V is STR3 hydrogen or C1 -C4 -alkyl which is unsubstituted or substituted by C1 -C2 -alkoxy, carboxyl, sulfo, halogen or hydroxy, Z is β-halogenoethyl, vinyl or β-acetoxyethyl, or A is a radical of the formulae STR4 in all of which R' is C1-6 -alkyl or hydrogen, Z is as defined above, o is 0 to 6, and m is 2 to 6.
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- Triazinyl reactive dyes containing additional fiber reactive groups bound through the sulfonylalkylaminoalkylamino bridge
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The invention relates to novel useful reactive dyes of the formula I STR1 in which: F is a radical selected from the group consisting of metal-free or metal-containing monoazo or disazo dyes containing at least one --SO3 H group, anthraquinone dyes, sulfophthalocyanine dyes, formazan dyes, phenazine dyes, oxanine dyes and nitroaryl dyes, R is hydrogen, C1 -C4 alkyl which is unsubstituted or substituted with --COOH or --SO3 H, cyanoethyl, or hydroxyethyl, X is fluorine, chlorine, bromine, --SO3 H, phenylsulfonyl or C1 -C4 -alkylsulfonyl, P is 1 or 2 and A is a radical of the formula STR2 in which: the groups designated "alk" are independently of each other straight or branched polymethylene radicals having 2 to 6 carbon atoms, and Z is β-halogenoethyl, vinyl, β-sulfatoethyl, β-thiosulfatoethyl or βacetoxyethyl.
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- Process for monoacylating water-soluble organic amino compounds
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A process for the monoacylation of water-soluble organic amino compounds with 2,4,6-trifluoro-s-triazine, which comprises introducing all reactants simultaneously and continuously in the amounts necessary for the required throughput into the reaction space and removing the resultant reaction products continuously therefrom.
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- Barium laked phenylazonaphthalene dye containing sulfonic acid groups
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Azo dyes containing sulfonic acid groups laked with barium and derived from an anilinesulfonic acid as diazo component and a β-naphtholsulfonic acid as coupling component for example a dye of the formula STR1 The dyes are eminently suitable as pigments for coloring surface coating compositions, printing inks and particlarly resins.
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