33 results about "P-Cresol" patented technology

The utility model relates to a process device for hydrocarbonylation reaction of m-cresol and p-cresol under catalysis of solid acid. An outlet of a premixing tank is communicated with a first centrifugal pump and then is communicated with the lower part of a reactor; a gas outlet of the first steel cylinder is communicated with the reactor; the lower part of the reactor is sequentially communicated with a second centrifugal pump and a liquid storage tank. The premixing tank is used for pre-stirring and mixing an m-cresol solution and a solid acid catalyst to form reaction slurry; the first centrifugal pump is used for introducing reaction slurry into the reactor; the high-pressure isobutene liquid in the first steel cylinder is depressurized into gas and then enters the reactor; cresol, a solid acid catalyst and isobutene are mixed in the reactor at a set temperature for a catalytic alkylation reaction; the second centrifugal pump is used for extracting the completely reacted alkylation mixed product out of the reactor, the alkylation mixed product is stored in the liquid storage tank, and the solid acid catalyst is left to stand and settled, so that in-situ separation of a liquid-phase product and a solid-phase catalyst is realized.

The disclosure relates to a method for producing a propylene polymer composition, comprising melt processing a propylene polymer in the presence of a composition comprising at least one hydrogen donor comprising a di-substituted p-cresol derivative, at least one peroxide comprising a peroxydicarbonate, and at least one polymer additive comprising at least one antioxidant distinct from the at least one hydrogen donor The melt processing is performed under inert conditions. The disclosure further relates to embodiments of propylene polymer compositions.

The invention discloses a method for preparing m-cresol, p-cresol and m-cresol phenolic resin by using crude phenol refining residues. According to the method, an acidic silicon-aluminum oxide solid catalyst and a zirconium phosphate system are adopted, long alkyl groups such as ethyl groups on aromatic rings in a 3, 4-methyl ethyl phenol mixture are removed, methyl groups are reserved, phenol containing the long alkyl groups is converted into simple cresol, phenol and the like, and then vacuum distillation treatment is performed to obtain phenol, m-p-cresol and 2, 3, 5-tricresol; further reacting the mixed phenol obtained by rectification with aldehydes to obtain modified m-cresol-formaldehyde resin products such as p-cresol, 2, 3, 5-tricresol and the like; complex raw materials are converted into simple products with clear targets through the cracking reaction, sulfur and nitrogen impurities in most of the raw materials are removed by utilizing an acid environment in the cracking process, an additional refining step is omitted, and the grades of all subsequent products are improved. According to the method, the limitation of traditional rectification is broken through, the difficulty of physical separation is simplified through a chemical means, the phenol and the phenolic resin are co-produced, and the added value of the product is improved.

This invention belongs to the field of polymer materials and relates to a method for preparing a multifunctional emulsion antioxidant and its application, specifically to an emulsion antioxidant that also absorbs ultraviolet light and its application. A multifunctional emulsion-type antioxidant comprises the following components: a phenolic primary antioxidant, wherein the phenolic primary antioxidant comprises a mixture of p-cresol and dicyclopentadiene copolymer (TH-CPL) and triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate] (antioxidant 245); a thioester secondary antioxidant; a UV absorber; a light stabilizer; a nonionic surfactant; and deionized water; wherein the UV absorber is N-(ethoxycarbonylphenyl)-N'-methyl-N'-phenylformamidinium (UV-1), and the light stabilizer is a mixture of bis(1,2,2,6,6-pentamethyl-4-piperidine) sebacate and 1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidine) sebacate (292).

The application provides a preparation method of 2,6-di-tert-butyl-p-cresol, which comprises the following steps: adding p-cresol and a catalyst into a reactor, heating in a constant-temperature water bath to mix the p-cresol and the catalyst sufficiently, and introducing isobutene into the system to prepare 2,6-di-tert-butyl-p-cresol through catalytic alkylation; wherein the catalyst is an ionic liquid complex composed of an ionic liquid ligand and a metal salt ligand. The method of the application uses the ionic liquid complex composed of the ionic liquid ligand and the metal salt ligand as the catalyst, so that the process reaction condition is more moderate, the process complexity and the production cost are reduced, and meanwhile, the p-cresol has a high conversion rate, the reaction has a high yield, and the demand of industrial production is met.

The objective is to provide a beverage with enhanced fruity, juicy flavor and spicy, complex flavor, a method for manufacturing the beverage, and a method for improving the flavor of the beverage. [Solution] The beverage according to the present invention contains sotolon and p-cresol. The beverage according to the present invention also contains ethanol. The sotolon content of the beverage according to the present invention is 0.25 to 8.00 ppm. The p-cresol content of the beverage according to the present invention is 0.01 to 1.00 ppm. The acidity of the beverage according to the present invention is 0.20 g / 100 mL or more.

This invention provides a composition effective in suppressing the deterioration of citral flavor. [Solution] A citral flavor-suppressing composition containing one or more compounds selected from the group consisting of 8-methyl-4-methylenenona-7-en-2-one and 4,8-dimethylnona-3,7-dien-2-one as an active ingredient. Preferably, it contains at least 8-methyl-4-methylenenona-7-en-2-one. Alternatively, preferably, the unpleasant flavor is due to p-cresol and / or p-methylacetophenone.

This invention relates to the field of m-p-cresol separation technology, and more particularly to a separation device for m-p-cresol separation production, comprising a fixed bed; a data acquisition module for real-time acquisition of p-cresol concentration and liquid flow rate; an interface determination module for determining a first interface and a second interface, including a leveling monitoring unit for determining whether the contact between the m-p-cresol mixture and the adsorbent is qualified based on an interface level index, and adjusting the spray flow rate of the m-p-cresol mixture; and an interface monitoring module for determining whether the adsorption process of p-cresol is qualified based on a spacing stability index between the first and second interfaces, and optimizing the flow rate adjustment coefficient; and an efficiency monitoring module for determining whether the separation efficiency of the m-p-cresol mixture is qualified based on the adsorption utilization rate of the adsorbent, and optimizing a preset level index. This invention improves the adsorption utilization rate of the adsorbent.

The application provides a molecular sieve for adsorptive separation of m-cresol and p-cresol and a preparation method and application thereof, wherein the molecular sieve is a ZSM-5 molecular sieve whose cation sites are jointly occupied by metal cations of group IA and rare earth metal cations, or a ZSM-5 molecular sieve whose cation sites are jointly occupied by metal cations of group IIA and rare earth metal cations. The pore size of the molecular sieve is regulated by complex modification of rare earth ions to realize selective adsorption of m-cresol and p-cresol, so that high-purity m-cresol and p-cresol can be obtained.

The application discloses a catalyst for efficiently synthesizing 4-methyl catechol from p-cresol and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: dissolving an active component in water, impregnating the active component on a carrier by using an equal-volume impregnation method, drying after sufficient impregnation, calcining in a muffle furnace, and extruding the product after calcination and a binder into a strip, drying, and calcining again in the muffle furnace. The active component is one of the following: 1) iron salt and vanadium salt, the mass ratio of the two is 1:0.5-2, and the total mass of the two is 40-70% of the mass of the carrier; 2) main metal salt and doped metal salt, the mass ratio of the two is 7.5-50:1, and the total mass of the two is 20-42% of the mass of the carrier. The main metal salt is iron salt or vanadium salt, and the doped metal salt is cobalt salt, nickel salt, copper salt or palladium salt. The catalyst is applied to catalyze the synthesis of 4-methyl catechol from p-cresol, simplifies the synthesis route, improves the production efficiency, has high catalyst activity, and has high target product yield and few by-products.

The present application belongs to the field of chemical technology, and particularly relates to a method and system for separating meta-cresol and para-cresol. The method comprises, in sequence, the steps of oxidation, neutralization, filtration, water vapor distillation and acidification. The neutralization comprises: passing in carbon dioxide until the pH of the system is 5.0-6.0. The present application selectively oxidizes para-cresol into para-hydroxybenzaldehyde, and separates the meta-cresol and para-hydroxybenzaldehyde by virtue of the difference in physical properties, thereby obtaining two products with high added value. By controlling the pH of the neutralization step to be within the range of 5.0-6.0, the yield can be improved.

The objective is to provide a beverage with enhanced fruity, juicy flavor and spicy, complex flavor, a method for manufacturing the beverage, and a method for improving the flavor of the beverage. [Solution] The beverage according to the present invention contains sotolon and p-cresol. The beverage according to the present invention also contains ethanol. The sotolon content of the beverage according to the present invention is 0.25 to 8.00 ppm. The p-cresol content of the beverage according to the present invention is 0.01 to 1.00 ppm. The acidity of the beverage according to the present invention is 0.20 g / 100 mL or more.

The utility model relates to an energy-saving device for separating refined phenol from tar crude phenol, and belongs to the field of tar crude phenol refining. The device comprises a separation device and an energy-saving thermal circulation loop device, the separation device comprises a first tower, a second tower, a third tower, a fourth tower, a fifth tower and matched cold exchange equipment, and the energy-saving thermal circulation loop device comprises a compressor, a throttling valve, a buffer tank and matched cold exchange equipment. According to the energy-saving device, high-purity products are obtained through dehydration, light component removal, phenol residue removal and phenol, o-cresol and m-cresol and p-cresol refining of tar crude phenol, the product purity is improved by dividing the area in the tower, low-grade waste heat is converted into a high-grade heat source through a compressor, traditional heating media and refrigerants are replaced, and the energy-saving purpose is achieved. According to the device, the tar crude phenol is separated and refined into high-purity phenol, o-cresol and m-cresol and p-cresol products, meanwhile, the purposes of saving energy and reducing consumption are achieved, and the device has important significance.

The invention discloses a technological synthesis method of 6-(N-ethyl-4-toluidine)-2-methylfluorane, and relates to the technical field of organic synthesis. The method comprises the following four steps of: (1) reacting resorcinol as shown in a formula I and p-toluidine as shown in a formula II in an acid catalysis system and an organic solvent at 110-145 DEG C for 20-28 hours to obtain a formula III; (2) carrying out reductive amination on the compound shown in the formula III and a compound shown in the formula IV (paraldehyde) in the presence of a catalyst under the hydrogen pressure of 0.1-5 MPa to obtain a compound shown in the formula V; (3) reacting the formula V with a formula VI (phthalic anhydride) in an organic solvent at 100-120 DEG C for 10-15 hours to obtain a formula VIII; and (4) carrying out dehydration condensation on the formula VIII and the formula IX (p-cresol) under an acidic condition to obtain a target product. Raw materials are easy to obtain, the yield of each step is larger than or equal to 80%, energy consumption and cost are reduced, operation safety is improved, the method is suitable for industrial production, and import dependence of high-end heat-sensitive materials can be broken through.

The invention discloses a catalyst for synthesizing 2-tert-butyl p-cresol as well as a preparation method and application of the catalyst, and belongs to the technical field of chemical catalysts. The invention discloses a catalyst for synthesizing 2-tert-butyl p-cresol. The catalyst is metal oxide loaded phosphotungstic acid; the metal oxide is one of SiO2, TiO2 and ZrO2, or is a metal composite oxide of ZrO2 and TiO2. The catalyst is a solid acid catalyst with excellent performance, is easy to separate from a product, has mild reaction conditions (normal pressure, low temperature and short reaction time) and high catalytic activity, and is suitable for industrial production. The technical problem that industrial production cannot be achieved due to the fact that an existing heterogeneous catalyst for synthesizing 2-tert-butyl p-cresol is high in preparation cost, prone to pollution and poor in catalytic activity can be solved.

The application discloses a preparation method of a FAU / EMT symbiotic molecular sieve adsorbent for liquid-phase adsorption separation, and belongs to the field of chemical material preparation and application. + 2+ ion exchange; then the exchanged molecular sieve is flash dried into a powder with an average particle size of less than 30 microns, and the powder is uniformly mixed with clay and an additive in a certain proportion to prepare adsorbent pellets with a diameter of 0.3-0.8 mm; finally, the adsorbent is dehydrated and activated to obtain an adsorbent product with a dry basis of 94.5-99.5%. The adsorbent is loaded into a simulated moving bed, and can be used for the adsorption separation and purification of m-cresol isomers, xylene isomers, diethylbenzene isomers, methyl-ethylbenzene isomers and the like, so that high-purity single-isomer products are obtained, and the complete separation and purification effect of isomers is realized.​

A method for producing a propylene polymer composition, comprising melt processing a propylene polymer in the presence of a composition comprising at least one hydrogen donor comprising a di-substituted p-cresol derivative, at least one peroxide comprising a peroxydicarbonate, and at least one polymer additive comprising at least one antioxidant. The melt processing is performed under inert conditions. The disclosure further relates to embodiments of propylene polymer compositions.

The application discloses a preparation method of an m-p-cresol isomer separation and purification adsorbent, relates to an adsorption and desorption treatment process on a zeolite molecular sieve adsorbent, and belongs to the field of chemical separation applications. The LSX molecular sieve with the Si / Al atomic ratio in the range of 1.0-1.1 is fully stirred and mixed with a pillared bentonite and polyacrylamide, is formed into a ball, is exchanged with metal cations of group IA and group IIA, and is treated through drying, dehydration activation and the like to obtain a formed adsorbent. The formed adsorbent is loaded into a countercurrent simulated moving bed, continuous m-p-cresol material, a desorption agent and continuous extraction liquid, raffinate material are realized, and finally high-purity m-cresol and p-cresol products are obtained. The method is efficient, low in energy consumption, can obtain single cresol isomers, and has a good application prospect.

The utility model discloses a rectification device for separating m-cresol and p-cresol. The rectification device comprises a dealkylation reactor, a first flash tank, a second flash tank and a rectification tower, a feeding pipeline is mounted at a feeding hole of the dealkylation reactor, and a discharging pipeline is mounted at a discharging hole of the dealkylation reactor; a feed port of the first flash tank is connected with one end of the discharge pipeline, communicating pipelines are mounted at the bottoms of the first flash tank and the second flash tank, and compression recovery assemblies for compressing and recovering reaction products are mounted at the tops of the first flash tank and the second flash tank; an advanced dealkylation reaction process and a reflux process section design thereof are adopted, so that high-purity separation of m-cresol and p-cresol and efficient recovery of a byproduct isobutene can be realized, a very small amount of isobutene of p-cresol or m-cresol which is not separated can be circularly rectified, the waste of p-cresol or m-cresol and isobutene is reduced, and the production cost is reduced. The purity and the yield of the product are improved, the energy consumption and the production cost are reduced, and the method has a wide application prospect.

The present application relates to chemical product separation equipment technical field, specifically disclose a kind of reaction crystallizer and crystallization method for m-p-cresol separation and purification, comprising: rotating rod;Sealing box;Filter screen;Conical tube;Discharge pipe.By making mother liquor drive p-cresol crystal from spray tube, and the p-cresol crystal that sprays hits filter screen, makes p-cresol crystal scatter broken, and m-cresol solution wrapped in crystal will splash out and separate from crystal at this time, and m-cresol solution that splashes out is discharged through filter screen, so it can effectively avoid p-cresol crystal to have m-cresol solution, to effectively avoid the purity of m, p-cresol after separation reduces.

This invention provides a coffee flavoring and its preparation method, comprising 0.1 parts of furanone, 2-acetylpyrazine, vanillin, ethanol, 3-methylthiopropional, 2-methoxy-4-vinylphenol, 2-ethyl-3-methylpyrazine, 2-ethyl-3,5-dimethylpyrazine, furfuryl mercaptan, β-damascone, p-cresol, hexanoic acid, 2-methylbutyric acid, 2,3-pentanedione, methyl furfuryl disulfide, 3-mercapto-3-methylbutyl formate, terpineol, 1-octen-3-ol, isobutyraldehyde, furfural, 5-methylfurfural, isovaleraldehyde, linalool, 2-methoxy-3-isobutylpyrazine, phenylacetaldehyde, eugenol, 2,3,5-trimethylpyridinium, guaiacol, 4-ethylguaiacol, an amino acid composition, glycerol, water, and coffee extract. The coffee flavoring of this invention has a strong three-dimensional aroma, rich layers, and high overall aroma realism and harmony.

The disclosure relates to a method for producing a propylene polymer composition, comprising melt processing a propylene polymer in the presence of a composition comprising at least one hydrogen donor comprising a di-substituted p-cresol derivative, at least one peroxide comprising a peroxydicarbonate, and at least one polymer additive comprising at least one antioxidant. The melt processing is performed under inert conditions. The disclosure further relates to embodiments of propylene polymer compositions.

The application discloses a method for separating m-p-cresol phenol oil fraction to obtain dephenol phenol oil and phenol, which comprises the following steps: refining phenol-containing coal tar to obtain m-p-cresol phenol oil fraction; removing ethyl in the m-p-cresol phenol oil fraction by catalytic deethylation of o-ethyl phenol to convert into phenol; refining the reaction liquid to obtain 99.5% phenol and pre-dephenol phenol; and catalytically methylating the pre-dephenol phenol in a fixed bed reactor to generate a mixture of 2,4,6-trimethyl phenol and 2,3,6-trimethyl phenol and the like; and refining the mixture to obtain the dephe-nol phenol, refined 2,4,6-trimethyl phenol and 2,3,6-trimethyl phenol in sequence, so as to realize the separation of the m-p-cresol phenol oil fraction.

The application discloses a preparation method of high-purity m-cresol and belongs to the technical field of compound refining and purification. The application comprises the following steps: (1) preparation of a stationary phase: urea and a carrier are loaded on the carrier by cooling crystallization in an alcohol solvent, and then alcohol solvent is removed by drying under reduced pressure to obtain a supported crystalline urea, which is the stationary phase filler; (2) column loading: the stationary phase filler is loaded into a chromatographic column; (3) column chromatography: m-cresol raw materials to be separated are loaded on the column, a mobile phase is injected into the chromatographic column for gradient elution, and elution fractions in different time periods are collected; (4) post-treatment: the collected elution fractions rich in m-cresol are concentrated and dried to obtain high-purity m-cresol. The carrier loaded with urea is used as the stationary phase of the chromatographic column, m-cresol with a purity higher than 99.0% and a p-cresol content lower than 0.01% is prepared through column chromatography separation, and the method has the characteristics of simple process, high purity, high yield, low energy consumption and cost, less pollution and easy industrialization.

The invention belongs to the technical field of daily chemical products, and particularly relates to a color stabilizer for perfume as well as a preparation method and application thereof. The color stabilizer is prepared from the following components in parts by weight: 40 to 70 parts of ethylhexyl methoxycinnamate, 20 to 50 parts of diethylamino hydroxybenzoyl hexyl benzoate, 5 to 15 parts of octotriazole and 0.1 to 1 part of benzotriazolyl dodecyl p-cresol. The composite stabilizer can synchronously realize UVA + UVB full-wave band blocking and built-in light stabilization functions only through one-time compounding, does not need to additionally add a light stabilizer, has double effects of oxidation resistance and ultraviolet absorption, simplifies the use of the stabilizer in a perfume formula, and effectively improves the color durability and overall stability of the product.

The invention relates to an energy-saving separation process method for phenol refining, and belongs to the field of phenol refining. The energy-saving separation process method comprises two parts of crude phenol and refined phenol, and the areas in the crude phenol tower and the refined phenol tower are separated to realize multi-component separation, improve the product purity and realize energy conservation. The low-grade waste heat of the crude phenol is converted into a high-grade heat source required by the crude phenol and the refined phenol through the compressor, the low-grade waste heat of the refined phenol is converted into the high-grade heat source required by the refined phenol, traditional heating media and refrigerants are replaced, and the purpose of saving energy is achieved. According to the energy-saving separation process method, the crude phenol is separated to prepare high-purity phenol, o-cresol and m-cresol and p-cresol products, meanwhile, the purposes of saving energy, reducing consumption and reducing equipment investment are achieved, and the energy-saving separation process method has important significance.

The application relates to a method for synthesizing 2,4-dimethylphenol by methylating p-cresol, and belongs to the technical field of fine chemical industry. The method comprises the following steps: preparing a Fe-Cr-Si-Cu composite catalyst; loading the catalyst in a fixed bed reactor and activating the catalyst; mixing p-cresol and methanol according to a mass ratio of 1:3 to 1:5, preheating and vaporizing the mixture, and continuously inputting the mixture into the reactor at an air speed of 0.5 to 1.0 h ‑1 -1 under normal pressure at 330 to 360 DEG C to perform a continuous methylation reaction; and obtaining high-purity 2,4-dimethylphenol by condensing, washing with water and performing vacuum rectification on the product. The application adopts a multi-metal composite catalyst, has good synergistic catalysis effect, the conversion rate of p-cresol can reach 99%, the selectivity of 2,4-dimethylphenol can reach 85% to 90%, and the by-products are few; the fixed bed continuous process condition is mild, the catalyst has high stability, is suitable for industrial production, and has high product purity and low separation cost.

The invention belongs to the technical field of synthetic biology, and particularly relates to a method for producing p-cresol by utilizing a microbial cell factory. According to the method for producing p-cresol by utilizing the microbial cell factory, provided by the invention, a recombinant plasmid pAC-GfbrL Afbr, a recombinant plasmid pCD-H and a recombinant plasmid pRS-KISC are transformed into an escherichia coli BL21 (DE3) competent strain in which tyrR and pheA genes are knocked out at the same time to construct an engineering bacterium; the engineering bacterium can enhance expression of tyrosine lyase for catalyzing p-cresol synthesis, strengthen a synthesis pathway of p-cresol precursor tyrosine, relieve feedback inhibition and eliminate a competitive pathway of the p-cresol precursor tyrosine, strengthen a cofactor synthesis system and construct a microbial cell factory for efficiently producing p-cresol; the yield of p-cresol synthesized by the microbial cell factory is further improved by improving the fermentation initial bacterial liquid concentration and the fermentation oxygen supply condition and adding the precursor in the microbial cell factory.