Abstract:
Disclosed is a process for preparing dioxazine pigments of formula I, preferably Pigment Violet 23(wherein R=C2H5), from compounds of formula II. The compounds of formula II are cyclized to form the dioxazine compounds of formula I in organic solvent b using a cyclizing agent such as air and/or oxygen. (Formula II, I)
Abstract translation:公开了由式II化合物制备式I的二嗪颜料,优选颜料紫23(其中R = C 2 H 5)的方法。 使用环化剂如空气和/或氧气使式II化合物在有机溶剂b中环化形成式I的二恶嗪化合物。 (式II,I)
Abstract:
A process for extracting metal values from ores or residues is disclosed. The process mentioned above is mainly suitable for aluminoferrous ores such as bauxite, titanoferrous ores such as ilmenite, or residues such as red mud waste. The process involves pulverizing the ore and/or residue and mixing with a carbonaceous material, followed by smelting the iron values and slag in the mixture to yield molten iron and oxides of aluminum and titanium. The process is simple, cost-effective, and provides effective extraction of high purity metal values.
Abstract:
The present disclosure relates to a polymer composition comprising a polymer blend of Polyaryl Ether Ketone (PAEK) and Poly(2,5-benzimidazole) characterized with enhanced mechanical and wear resistance properties as compared to commercial polymer blends of Polyaryl Ether Ketone and Polybenzimidazole. The present disclosure also relates to shaped articles derived from the polymer composition of the present disclosure.
Abstract:
The present invention provides novel crystalline polymorphic forms of fipronil and processes for preparing the same. The present invention also provides a pesticidal composition containing a pesticidally effective amount of a crystalline form of fipronil and a method for controlling pests using a pesticidally effective amount of a crystalline form of fipronil or its composition.
Abstract:
A method for preparing polyhalogenated p-trifluoromethylanilines, especially 2,6-dihalo-p-trifluoromethylaniline is provided The method comprises reacting ammonia with 3,4-dihalobenzotrifluoride at a temperature ranging from 200 °C to 300 °C in the presence of an alkali halide, and then halogenating the resultant intermediates with halogenating agents like sulfuryl chloride, chlorine and PC1 5 to get 2,6-dihalo-p-trifluoromethylaniline.
Abstract:
The present disclosure relates to a benzoyl substituted carbazole-dioxazine pigment and its preparation. The process involves benzoylation of 3-nitro-N-ethylcarbazole in monochlorobenzene using benzoylchloride and ferric chloride to yield 3-nitro-6-benzoyl-N-ethyl carbazole, which on catalytic hydrogenation and subsequent condensation with chloranil and cyclisation yields benzoyl substituted carbazole-dioxazine pigment.
Abstract:
The present disclosure provides a polymeric composition resistant to temperatures comprising Poly 2,5rBenzimidazole having intrinsic viscosity (I. V.) between 1.0 and 2.5; and at least one binder having a glass transition temperature less than the glass transition temperature of Poly2,5- Benzimidazole and intrinsic viscosity ranging between 0.2 and 1.5. The present disclosure also provides a process for preparing the polymeric composition resistant to temperatures.
Abstract:
A process for preparation of lower chlorides of titanium is provided, in which titanium tetrachloride (TiCl4) is reduced using a reducing agent in at least one molten alkali metal salt at a temperature of about 300 to about 1400°C to obtain a reduced mass containing lower chlorides of titanium. A process for preparation of titanium metal from the lower chlorides of titanium is also provided.
Abstract:
A process for preparation of Fipronil (i.e. 5-amino-l-(2, 6-dichloro-4-trifluoromethylphenyl)-3-cyano-4-trifluoromethylsulphinyl-pyrazole) is provided, which comprises oxidizing 5-amino-l-(2, 6-dichloro-4-trifluoromethylphenyl)-3-cyano-4-trifluoromethylthio-pyrazole with sulfuric acid and hydrogen peroxide as oxidizing agent in the presence of a solvent such as ethylene dichloride, chlorobenzene.
Abstract:
A process for preparing polyhalogenated perfluoroalkylanilines particularly useful as reaction intermediates for preparing agrochemicals is disclosed The process comprises reacting anhydrous monomethylamine with 3,4-dichlorobenzotπfluoπde at a temperature of 140-200 °C, halogenating the resultant intermediate with halogenating agents like chloride, sulfuryl chloride and PC1 5 , and then dealkylating the deactivated aniline with catalytic quantity of pyridine salt and dry HC1 gas at 180-190 °C or with anhydrous hydrobromic acid to get 2,6-dichloro-4-trifluoromethylaniline.