319 results about "Fluorenone" patented technology

An aromatic dicarboxylic acid is purified by oxidizing m-xylene or p-xylene to produce crude isophthalic acid or crude terephthalic acid, respectively. The products of the oxidizing step are hydrogenated in the presence of a palladium catalyst. Carbon monoxide is introduced during the hydrogenation step. The palladium catalyst is provided on a carbon substrate. The products of the oxidizing step are dissolved in a solvent, which may be water, prior to the hydrogenation step. The products of the oxidizing step may be dissolved at an elevated temperature, above the normal boiling point of the solvent. The oxidation step produces isophthalic acid, 3-carboxybenzaldehyde and fluorenones in the case of oxidizing m-xylene and produces terephthalic acid, 4-carboxybenzaldehyde and fluorenones in the case of oxidizing p-xylene. It may be helpful to monitor the disappearance of 3-carboxybenzaldehyde in the case of oxidizing m-xylene and 4-carboxybenzaldehyde in the case of oxidizing pxylene, and reducing the amount of carbon monoxide when the rate of disappearance is below a predetermined minimum. After the hydrogenation step, the isophthalic acid or terephthalic acid may be crystallized. The carbon monoxide may be maintained at a concentration of 100 to 500 ppm based on added hydrogen and carbon monoxide. Other aromatic dicarboxylic acids may also purified by this procedure.

The invention discloses a method to prepare 9-fluorenone with fluorene. Wherein, using dimethyl sulfoxide as solvent, sodium hydroxide as catalyst, oxygen as oxidant and tower filling reactor; cooling and filtering the reacted liquid to obtain 93% coarse fluorenone; distilling liquid and recycling 94% solvent and some coarse fluorenone; refining with oriented crystallization method and obtaining yellow piece 99.8% fluorenone. This method is simple, needs short reaction time, produces no waste water, and convenient to produce in industry.

The invention relates to the technical field of production of an aromatic compound 9-fluorenone, in particular to a preparation method of the 9-fluorenone. The preparation method includes the steps as follows: 1) taking industrial fluorene, benzene series solvent, sodium hydroxide and quaternary ammonium salt, and adding the four components in a four-mouth bottle; 2) stirring the mixture in normal pressure, increasing the temperature to above 90 DEG C, reacting, and introducing air for oxidization; 3) conducting reduced-pressure distillation and allowing concentrate to crystallize, thus obtaining yellow fluorenone crystals; and 4) washing the fluorenone crystals for one time and then drying the fluorenone crystals, thus obtaining the 9-fluorenone product. The benzene series solvent is toluene or dimethylbenzene. Compared with the prior art, the preparation method has the benefits as follows: 1) the reaction temperature is low, the operation is simple and convenient and the reaction conditions are moderate; 2) the cheap sodium hydroxide is taken as a catalyst, so the cost is low; 3) the benzene series solvent can be recycled by reduced-pressure distillation, washing water is little in quantity, treatment is easy and pollution to environment is small; and 4) the gas chromatographic purity of the product is higher than 99.2%, the yield is higher than 86.7% and the production requirements are met.

A photoreceptor including at least an electroconductive substrate, and a charge blocking layer, a moiré preventing layer, and a photosensitive layer, which are located overlying the electroconductive substrate in this order, wherein the photosensitive layer includes an azo pigment having a fluorenone skeleton. The photosensitive layer is preferably prepared by coating a coating liquid including a dispersion which is prepared by dispersing the azo pigment in a solvent to an extent such that the average particle diameter of the azo pigment is not greater than 0.3 μm and the standard deviation of the particle diameter is not greater than 0.2 μm, followed by filtering with a filter having an effective pore diameter not greater than 5 μm. An image forming apparatus and a process cartridge including the photoreceptor.

The invention discloses a method for preparing 9-fluorenone via four-phase transfer catalysis. At a lower temperature, alkali is taken as a catalyst, quaternary ammonium salt serves as a phase transfer agent, fluorene can be excessive and reacts with oxygen-containing gas in xylene in states of dissolution and suspension, and high-purity 9-fluorenone is directly obtained, a right reaction condition is selected, and the transformation rate of the fluorene can reach 100 percent. According to the invention, the recovered alkali and the dissolvent do not need to be treated complexly and particularly, reuse can be realized, and industrialization is facilitated; in addition, mixed xylene and water are taken as the dissolvent, the oxidation of the fluorene as the reaction condition of the 9-fluorenone, the selection of the catalyst alkali and phase transfer agent, and the reuse of the dissolvent and the alkali are researched, as a result, the conditions of high transmission rate of fluorene and high selective transmission of the 9-fluorenone are obtained, and a more complete compounding process is disclosed.

The invention discloses substituted benzophenone and a preparation method thereof. The substituted benzophenone has a benzophenone structure, can be used as a hydrogen abstraction type photoinitiator, can be widely applied to ultraviolet light curing and other fields, and can also be used as a key intermediate to synthesize a poly-substituted fluorenone type compound. The preparation method of the substituted benzophenone, provided by the invention, is simple to operate, toxic substances are not used, an intermediate compound B and an intermediate compound A are ingeniously utilized to construct a benzhydrol structure through Grignard reaction, and the compound with the benzophenone structure is further obtained by oxidation with pyridinium chlorodichromate; the defect that synthesis methods of benzophenone type compounds in the prior art can not be widely applied is overcome.

The invention discloses a synthesis method of indenofluorene derivatives, isotruxene and mono-substituted isotruxene derivatives. The synthesis method of indenofluorene derivatives is characterized in that ester-group-containing compounds are formed through Diels-Alder reaction of methyl propiolate and indenocyclopentadienone, ethyl substituted indenofluorene derivatives are formed through hydrolysis, acid catalytic ring closing, carbonyl reduction and introduction of ethyl onto methylene, diketone compounds produced after ring closing react with lithium salt of 4, 4'-di-tert-butyl-2-brominated biphenyl, and then acidification and ring closing are conducted to obtain indenofluorene derivatives with spirofluorene. The synthesis method of isotruxene is characterized in that 1, 4-diphenyl-2, 3-di (carbalkoxy) fluorenone products are formed through the Diels-Alder reaction of indenocyclopentadienone and dimethyl acetylenedicarboxylate, isotruxene ketone is obtained through hydrolysis and acid catalytic ring closing and finally isotruxene is obtained; dibenzyl alcohol products are formed through the Diels-Alder reaction of 1, 4-butynediol and indenocyclopentadienone, and isotruxene is obtained through acetone protection, carbonyl reduction, acetone removal and polyphosphoric acid (PPA) ring closing; and oriented oxy substituted products, i.e. isotruxene ketone which is derived from isotruxene with methylene at a No.5 position being substituted, and corresponding diethyl substituted products are additionally obtained. The indenofluorene derivatives, the isotruxene and the mono-substituted isotruxene derivatives disclosed by the invention can be used in the field of organic electroluminescence and organic micro-molecule solar cells.

Disclosed is a process for producing a crystal polymorph of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, which comprises the steps of: reacting fluorenone with 2-phenoxyethanol in the presence of a heteropoly acid; causing the crystallization of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene from the reaction mixture at a temperature lower than 50 DEG C to produce a crude product of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene; dissolving the crude product in at least one solvent selected from the group consisting of an aromatic hydrocarbon solvent, a ketone solvent and an ester solvent; and causing the crystallization of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene from the reaction mixture at a temperature of 50 DEG C or higher.

The invention discloses a preparation method for 9-fluorenone. According to the method, industrial fluorene (the purity is more than 95 percent) is taken as a raw material, alkali is taken as a catalyst, a heterocyclic compound containing nitrogen and water are used as solvent and quaternary ammonium salt is taken as a phase transfer agent; under the lower temperature and stirring condition, fluorene and gas containing oxide react and the fluorene is converted into 9-fluorenone; by selecting proper reaction conditions, the conversion rate of the fluorene can reach 100 percent. The recovered alkali and solvent in the invention can be recycled without a special complex treatment process and benefit the industrialization. According to the preparation method disclosed by the invention, quinoline and isoquinoline as well as a mixer of the quinoline and the isoquinoline are taken as the solvent and the reaction condition that the fluorene is oxidized into the 9-fluorenone, the selection of the alkali as the catalyst and the phase transfer agent and the recycling of the solvent and the alkali are researched to obtain the conditions that the fluorene is converted into the 9-fluorenone at high conversion rate and high selectivity; and a complete synthetic process is provided.

The invention discloses a compound based on 1,8-diazafluoren-9-one and an application of the compound. According to the compound, the 1,8-diazafluoren-9-one is used as a mother nuclide, and two aromatic heterocyclic groups are connected to two sides of the 1,8-diazafluoren-9-one, so that crystallinity of molecules is destroyed, aggregation between the molecules is avoided, and good film forming performance is obtained. The compound disclosed by the invention is used as a luminescent layer material to be applied to an organic electroluminescent device, and the organic electroluminescent device applying the compound has favorable photoelectric properties and can meet requirements of panel manufacturing enterprises.

The invention relates to a bisphenol monomer containing a bi-tert-butyl and fluorenyl structure. The bisphenol monomer is 9, 9-bi(4-hydroxyl-3-tert-butyl phenyl) fluorine. The monomer is simple in a synthetic route, high in yield, easy to purify, stable at the room temperature and can be used for preparing fluorine-contained polyarylether. The bisphenol monomer containing the bi-tert-butyl and fluorenyl structure is prepared by the following steps of: reacting reactants 2-tert butyl phenol and 9-fluorenone in the presence of an acid catalyst, transferring a product into a mixed solvent of ethanol and water, carrying out suction filtering, and further recrystallizing to obtain the target product. The bisphenol monomer containing the bi-tert-butyl and fluorenyl structure is used for preparing the fluorine-contained polyarylether. The prepared polyarylether has good dissolving film forming property, excellent thermal property and low dielectric constant.

The invention discloses a compound based on monosubstituent-9-fluorenone and application thereof. The compound uses monosubstituent-9-fluorenone as a mother nucleus and allows a single side to be connected with a heteroaromatic group, so crystallinity of molecules is destroyed, aggregation of molecules is prevented, and good film forming ability is obtained. The compound is used as a luminescent layer material for an organic light-emitting diode and has good photoelectric performance.

The present invention relates to a synthesis method of 2-phenylaniline compounds as shown in the formula (V). The synthesis method comprises the following steps: substituted 9-fluorenone as shown in the formula (I) reacts under alkaline conditions to prepare a compound (II); the compound (II) and acylation agent perform acyl halogenation reaction to prepare a compound (III); the compound (III) performs ammoniation reaction to prepare a compound (IV); and the compound (IV) performs Hofmann degradation reaction to prepare the compound (V). The present invention discloses a novel synthesis method of the 2-phenylaniline compounds, and the present invention has the advantages of mild reaction conditions, easy operation, high utilization rate of atoms, high reaction yield, low production cost, suitability for industrial production, high implementation value and the socioeconomic benefits.

The invention relates to a top-bottom asymmetrical tert-butyl spirobifluorene compound. The compound of the invention has a structural formula as represented by (I), and in the structural formula, R1 can be any one of various electron-withdrawing groups and electron-donating groups, such as a variety of alkyl groups, substituted aryl groups, substituted heterocyclic radicals, substituted alkylene groups, substituted amino groups, chlorine, bromine and iodine, except tert-butyl groups. According to the invention, cheap and easily available 4,4'-di-tert-butyl-biphenyl is used a raw material and reacts with 2,7-biX-fluorenone (wherein X represents substituents) through bromination, X substituents on a fluorene ring are converted into a variety of functional groups, and other steps are also carried out so as to obtain the compound (I). The top-bottom asymmetrical tert-butyl spirobifluorene compound in the invention has the characteristics of low cost, a simple synthesis route, high yield, easiness in industrial production, a special spiro-conjugation effect, good dissolvability, high thermal stability and a wide applicability in the fields of organic light-emitting displays, organic non-linear materials, fluorescent probes and the like.

The invention relates to a fluorenone derivative, a preparation method of the fluorenone derivative and a redox method of synthetic fluorenone. The preparation method includes a, performing precursor synthesis; b, performing target product synthesis; c, performing purifying. The fluorenone derivative is obtained by the redox method of four alkyne and polyenynes and serves as non-silver sensitive material applied widely. The fluorenone serving as a medical intermediate is used for synthesis of various drugs.

Methylene substituted aromatic compounds can be oxidized using t-butyl hydroperoxide and microwave radiation. In particular, xylenes give primarily phthalic acids, while toluene gives benzoic acid. Other methylene substituted aromatic compounds where the methylene group is not part of a methyl group give ketones, rather than acids. For example, fluorene gives fluorenone. The process avoids the need for the presence of metals such as in catalysts or in oxidizing agents, and can be carried out using water rather than an organic solvent. Thus the process can conform with the ideals of green chemistry.

A method for preparing 9-fluorenone through using industrial fluorene is characterized in that a raw material industrial fluorene (having a purity of above 95%) reacts with an oxygen-containing gas at a low temperature under stirring in a solvent comprising toluene and water under the action of an alkali as a catalyst and a quaternary ammonium salt as a phase transfer agent to form 9-fluorenone. The fluorene conversion rate can reach 100% under appropriate reaction conditions. The alkali and solvent recovered in the invention can be recycled without special complex treatment processes, so it is beneficial for industrialization; and in the invention, the recycle of the catalyst alkali, the phase transfer agent quaternary ammonium salt and the solvent, a recrystallization technology and the like are researched, pure fluorenone is obtained, and the complete preparation method of the 9-fluorenone is provided.

The invention discloses a preparing method of 9-fluorenone compound through oxidizing fluorene compound, which comprises the following steps: dissolving fluorene compound in the tetrahydrofuran; adding potassium hydroxide; setting the weight rate of fluorene compound and tetrahydrofuran at 1:4-6 with the molar rate of fluorene compound and potassium hydroxide at 1:0.5-2.5; stirring under normal temperature and pressure; oxidizing in the air; reacting for 1-8h; filtering; distilling; washing; drying; obtaining the product with producing rate at 98-99% and purity at 99-99.5%.

The invention belongs to the technical field of treatment of wastewater from the chemical industry and particularly relates to a pretreatment method for fluorenone production wastewater. The pretreatment method is characterized by comprising the two steps of acidification and oxidation by activated carbon and Fenton's reagent. Specially, the pretreatment method comprises the following steps: (1) acidification: adding industrial sulfuric acid to the fluorenone production wastewater to adjust the pH to 1-3, stirring, and standing for layering; (2) oxidation by activated carbon and Fenton's reagent: simultaneously adding H2O2, FeSO4.7H2O and activated carbon to the wastewater subject to acidification, and conducting reactions under the condition of 35-55 DEG C for 30-120 min. Adsorption, oxidation and regeneration of activated carbon all occur in the step (2). Compared with the prior art, the pretreatment method has the benefits as follows: the pollutant removal efficiency for the fluorenone production wastewater is high; the COD removal rate can reach more than 97%; the biodegradability of the wastewater is significantly improved; the B/C is increased to more than 0.4 from less than 0.2. Therefore, the pretreatment method is of great significance for the sustainable development of fluorenone production enterprises and other chemical production enterprises.