Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

750 results about "Isobutylene" patented technology

Isobutylene (or 2-methylpropene) is a hydrocarbon of industrial significance. It is a four-carbon branched alkene (olefin), one of the four isomers of butylene. At standard temperature and pressure it is a colourless flammable gas.

Single-ion conductor polymer, ternary composite binder solution, high-solid-content sulfide electrolyte slurry and wet film forming method and application of high-solid-content sulfide electrolyte slurry

The invention discloses a single-ion conductor polymer, a ternary composite binder solution, high-solid-content sulfide electrolyte slurry and a wet film forming method and application thereof, and belongs to the technical field of all-solid-state lithium batteries. The key technical problems in the wet membrane preparation of the sulfide electrolyte are solved through an innovative solvent-binder synergistic system, and the method specifically comprises the steps that 1, through the synergistic effect of a non-polar solvent and a weak-polar solvent, low-viscosity coating of high-solid-content slurry is achieved while the chemical stability of the sulfide electrolyte is guaranteed; 2, a poly (lithium styrenesulfonate-butyl acrylate), styrene butadiene rubber and polyisobutene ternary composite binder is designed, a lithium ion transmission channel is provided through a lithium sulfonate group, a benzene ring structure in the styrene butadiene rubber enhances the mechanical strength, long-chain alkane in the polyisobutene improves the interface adhesive force, and the mechanical strength is improved; the three components cooperate to realize balance of mechanical and electrochemical properties of the electrolyte membrane, so that the prepared electrolyte membrane has low porosity, high ionic conductivity and mechanical strength.
Owner:SHANGHAI FIRM LITHIUM NEW ENERGY TECH CO LTD

High-performance anti-wear engine lubricating oil as well as preparation method and application thereof

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.
Owner:ZHENGZHOU JIURUN LUBRICATING OIL CO LTD

Low-viscosity high-dispersity aluminum oxide slurry and preparation method thereof

The invention belongs to the field of functional composite materials, and particularly relates to low-viscosity and high-dispersity aluminum oxide slurry and a preparation method thereof.The low-viscosity and high-dispersity aluminum oxide slurry is prepared from a newly-designed phosphono-carboxyl block copolymer and biquaternary ammonium salt polyether silane as composite modifiers; and efficient anchoring and stable dispersion of the surfaces of alumina particles are realized through the synergistic effect of molecular structures. The phosphono-carboxyl block copolymer is prepared through controllable polymerization and deprotection reaction, and strong chemical bonding is formed between a phosphono group and the surface of aluminum oxide; the biquaternary ammonium salt polyether silane is subjected to click chemical synthesis, and electrostatic adsorption of quaternary ammonium salt and the steric hindrance effect of a polyether chain are combined. When the slurry is prepared, the two modifiers are sequentially added into water, the aluminum oxide powder is added after the pH value is adjusted, finally, the isobutylene maleic anhydride copolymer and the defoaming agent are introduced, and the slurry is obtained through vacuum defoaming and filtering. The slurry prepared by the method has the characteristics of high solid content, low viscosity and good dispersion stability.
Owner:CHONGQING HOUSHENG NEW MATERIAL TECHNOLOGY CO LTD

Polypropylene composite material as well as preparation method and application thereof

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The invention provides a polypropylene composite material. The polypropylene composite material comprises the following components in parts by weight: 40-80 parts of copolymerized PP (polypropylene), 5-25 parts of POE (polyolefin elastomer), 5-25 parts of polyisobutene and 10-30 parts of filler, the number-average molecular weight of the polyisobutene is greater than 600. The POE elastomer, the polyisobutene and the filler are introduced into the copolymerized PP, so that the polypropylene composite material with low sink mark characteristic and good mechanical property can be obtained.
Owner:KINGFA SCI & TECH CO LTD

Butyl rubber sealing material and preparation method thereof

PendingCN121249059APolymer scienceVulcanization
The invention relates to the field of sealing materials, in particular to a butyl rubber sealing material and a preparation method thereof. Comprising the following components in parts by weight: 50-70 parts of butyl rubber, 30-50 parts of a brominated isobutylene-p-methylstyrene copolymer, 30-50 parts of carbon black, 8-12 parts of an alkyl phenolic resin vulcanizing agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent and 5-10 parts of a plasticizer. The butyl rubber provides ideal air tightness and heat aging resistance, bromine atoms are introduced into the brominated isobutylene-p-methylstyrene copolymer, co-vulcanization with the butyl rubber is achieved, it is ensured that a uniform and stable co-crosslinking network can be formed between the two rubber molecules, and the service life of the rubber is prolonged. The alkyl phenolic resin vulcanizing agent can form a C-C bond with high bond energy with two rubber molecules, so that the thermal aging resistance of the butyl rubber sealing material is effectively improved, the compression set is reduced, and the butyl rubber sealing material with excellent performance is prepared.
Owner:NINGBO QIAOSHI RUBBER PLASTIC CO LTD

Water-in-oil emulsion composition

The present invention relates to a composition in the form of a water-in-oil emulsion, including, (a) one or more esters formed from at least one fatty acid having more than 13 carbon atoms; (b) a polymer component including one or more polymerized (iso)butenes; (c) at least about 3% by weight of one or more carbohydrate fatty acid ester emulsifiers; (d) one or more fillers comprising hydrophobic silica; and (e) one or more pigments. The composition is substantially free of silicones & alkanes.
Owner:LOREAL SA

Hydrogenation device scale inhibitor for heavy high-sulfur raw oil and preparation method thereof

The invention discloses a hydrogenation device scale inhibitor for heavy high-sulfur raw oil and a preparation method of the hydrogenation device scale inhibitor, and relates to the technical field of scale inhibitors. The scale inhibitor is prepared from a polyisobutylene succinimide dispersing agent, a high-temperature-resistant scale inhibition dispersing agent, an anti-rust agent, an imidazoline corrosion inhibitor, an antioxidant, a sulfide chelating agent, a clearing agent, cup carbazole alkylbenzene sulfonate and a solvent in specific parts by weight. The preparation method comprises the following steps: heating the solvent to 80-100 DEG C, sequentially adding the other components, and stirring for 30-40 minutes. Aiming at the characteristics of heavy high-sulfur raw oil, the scale inhibitor realizes high scale inhibition rate, excellent high-temperature stability and strong sulfur corrosion resistance through a multi-component synergistic effect, effectively solves the problems of scaling and corrosion of a hydrogenation device, prolongs the operation cycle of the device, and is suitable for a hydrogenation process of high-sulfur and high-asphaltene raw oil.
Owner:YIXING XINGUANG BAOYI CHEM CO LTD

Composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor

A composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor. The composite oil phase is divided into material A and material B, wherein in the material A, a high-viscosity polyisobutylene maleic anhydride amine esterification derivative is used as a primary emulsifier to increase the strength and thickness of an emulsification film of an emulsion matrix, thereby improving the stability of the emulsion matrix; in the material B, a low-viscosity polyisobutylene maleic anhydride amine esterification derivative and SP-80 are used as primary emulsifiers to regulate the ammonium nitrate dissolution rate of the emulsion matrix, thereby improving the sensitization characteristic of the emulsion matrix; and the emulsion matrix prepared from two composite oil phases can effectively improve the water resistance of the emulsion matrix while the problems of high-temperature over-sensitization and low-temperature insensitivity are solved, so that the explosion quality is guaranteed.
Owner:ANSTEEL GROUP MINING CO LTD +1

Electroconductive pressure-sensitive adhesive tape

An electroconductive pressure-sensitive adhesive tape includes at least an electroconductive pressure-sensitive adhesive layer containing at least a rubber component and electroconductive particles. The rubber component contains a polyisobutylene (A) having a viscosity average molecular weight of 400,000 or more and 800,000 or less and a polyisobutylene (B) having a viscosity average molecular weight of 100,000 or less. The electroconductive pressure-sensitive adhesive tape achieves both a superior adhesive property and a high swelling resistance to an electrolyte layer, especially, a high swelling resistance to an electrolyte layer containing dimethyl carbonate.
Owner:DIC CORP

Preparation method of hexafluoroisobutylene

The invention provides a preparation method of hexafluoroisobutene, which comprises the following steps: firstly, reacting hexafluoroisopropanol with p-toluenesulfonyl chloride to generate an organic phase, then reacting with a cyano source to obtain 3, 3, 3-trifluoro-2-(trifluoromethyl) propionitrile, then reacting with an acid solution and a reducing agent in sequence to obtain hexafluoroisobutanol, and finally reacting with an acid solution and a reducing agent to obtain the hexafluoroisobutanol. And finally, carrying out alkali dehydration to generate hexafluoroisobutene. The preparation method provided by the invention is simple in process route and mild in reaction condition, the solvent used in the preparation process can be recycled, the pollution in the preparation process is reduced, and the preparation method is less in three wastes, environment-friendly and suitable for large-scale production.
Owner:LINGGAS MATERIALS TIANJIN LTD +1

Special fiber material and preparation method thereof

The invention provides a special fiber material and a preparation method thereof, and belongs to the technical field of polymer composites.The preparation method comprises the following steps that cellulose and an ethanol solution are mixed, polyvinyl alcohol and a 3-glycidoxypropyltrimethoxysilane solution are added, the pH is adjusted to be acidic, heating, suction filtration and drying are conducted, and modified cellulose is obtained; mixing expanded graphite, deionized water, ammonium persulfate and dilute sulphuric acid, heating, cooling, dropwise adding amino polyethylene glycol silane, heating, washing and drying to obtain modified expanded graphite; the preparation method comprises the following steps: mixing modified cellulose, modified expanded graphite, phosphate montmorillonite, 3-(methacryloyloxy) propyltrimethoxysilane, bisphenol A diglycidyl ether and 2-methylimidazole, stirring, heating, defoaming, and carrying out two-stage constant-temperature treatment to obtain the special fiber material. The special fiber material disclosed by the invention has good flame retardance, mechanical strength, water resistance and filtering performance, and can be applied to various organic composite boards, filter membranes and the like with high quality requirements.
Owner:BAOJI KEDA SPECIAL PAPER CO LTD

Silicon carbide pipe sealing connecting piece for laser-assisted high-entropy glass connection as well as preparation method and application of silicon carbide pipe sealing connecting piece

The invention belongs to the technical field of ceramic connection, and discloses a silicon carbide pipe sealing connecting piece for laser-assisted high-entropy glass connection and a preparation method and application thereof. According to the method, silicon oxide, aluminum oxide, titanium oxide, iron oxide and rare earth oxide which are equal in mole are subjected to planetary ball milling, rotary evaporation, drying and sieving to prepare solder powder. And slurry obtained by mixing an isobutylene maleic anhydride polymer 104 aqueous solution and solder powder is added from the other end assembled by the silicon carbide cladding tube and the end plug, and a to-be-connected piece is obtained. And placing the to-be-connected piece in laser equipment, heating the connection part through laser in different atmospheres until the connection part is molten, and rapidly cooling to obtain the high-entropy glass connected silicon carbide pipe sealing connection piece. The connecting layer of the connecting piece is compact, the connecting piece is tightly combined with the silicon carbide cladding pipe and the end plug of the silicon carbide cladding pipe, the connecting piece has good corrosion resistance and sealing performance, high mechanical strength is kept at 800 DEG C, and the connecting piece can be applied to the field of silicon carbide ceramic cladding end plug sealing.
Owner:GUANGDONG UNIV OF TECH

Butene (CO) polymer-based sealing materials for container closures

A container closure, particularly a vacuum turnlock closure, comprises a sealing element containing or made of a polymer compound (excluding PVC). The polymer compound comprises at least one polybutene polymer, at least one polymer derived from at least partially 1,2-bonded isobutylene monomer, at least one (co)PP polymer, and optionally other components and additives. In a preferred embodiment, the polybutene polymer is a copolymer with ethylene in particular. In a preferred embodiment, the polybutene polymer has a Shore A hardness of less than 85.
Owner:アクテガ ゲーエムベーハー

Compounds, their Preparation and Use

PendingUS20260092151A1Polymer scienceAlcohol
The invention relates to a polyisobutylene polyether alcohol amine compounds and compositions thereof. The invention also is directed to a new process for making the polyisobutylene polyether alcohol amine compound(s) by reacting a polyisobutylene epoxide with a specific polyetheramine, a protic solvent, a diluent, and optionally a catalyst. In addition, the invention further relates to the many uses of the polyisobutylene polyether alcohol amine compound(s) and composition(s) including but not limited to its use in lubricants, surfactants, emulsifiers, adhesives, resins, and the like.
Owner:TPC GROUP LLC

Durable corrosion-resistant water-stop belt and preparation method thereof

The invention discloses a durable corrosion-resistant water-stop belt and a preparation method thereof, and relates to the technical field of compositions containing polyisobutene high-molecular compounds. The durable corrosion-resistant water-stop belt is prepared from the following raw materials in parts by mass: 30 to 60 parts of ethylene propylene diene monomer, 20 to 40 parts of polyisobutene, 20 to 50 parts of filler, 0.5 to 3 parts of antioxidant, 0.5 to 3 parts of anti-aging agent, 1 to 5 parts of peroxide cross-linking agent and 1 to 10 parts of processing aid. Through the synergistic effect of the specific anti-aging agent and the antioxidant, photo-oxidative aging and thermo-oxidative aging of the material are effectively inhibited. The anti-aging agent absorbs ultraviolet rays and converts the ultraviolet rays into heat energy to prevent the ultraviolet rays from damaging polymer chains; and the antioxidant delays oxidative degradation. The two layers form double protective barriers, so that the service life of the waterstop is greatly prolonged, and the performance attenuation trend is slowed down. Through material innovation (anti-aging agent + PBS + EPDM) and process optimization (segmented mixing / cooling), three core advantages of prolonging the service life, strengthening corrosion resistance and improving construction convenience are synchronously realized.
Owner:YUYIN TECH CO LTD

Polyisobutylene Epoxide, its Preparation and Use

PendingUS20250382395A1Polymer sciencePtru catalyst
The invention relates to a new and improved process for making an epoxidized olefin, specifically, polyisobutylene epoxide. The inventive process generally comprises (a) combining a polyisobutylene and a solvent to form a first mixture, (b) combining a peroxide, a carboxylic acid and an acid catalyst to form a second mixture, (c) reacting the first and second mixtures forming a non-aqueous phase comprising a polyisobutylene epoxide and an aqueous phase; (d) separating the non-aqueous phase from the aqueous phase; (d) washing and neutralizing the non-aqueous phase, and (e) recovering in a high yield and high purity polyisobutylene epoxide. It was discovered that specific mole ratios and amounts of reactants provide for recovering in high yield and purity polyisobutylene epoxide with reduced detrimental by-products.
Owner:TPC GROUP LLC

Composite board including core and capstock, and associated method

A composite board, including a core, and a capstock positioned to at least partially cover the core, where the capstock includes 10 wt. % to 70 wt. % of polyvinyl chloride (PVC), based on a total weight of the capstock, 1 wt. % to 60 wt. % of acrylonitrile-styrene-acrylate (ASA), based on the total weight of the capstock, 1 wt. % to 60 wt. % of styrene-acrylonitrile (SAN), based on the total weight of the capstock, and 1 wt. % to 60 wt. % of a thermoplastic elastomer, where the thermoplastic elastomer includes styrene-isobutylene-styrene (SIBS), a thermoplastic copolyester elastomer, a polymeric plasticizer, and combinations thereof, wherein the capstock does not include thermoplastic polyurethane.
Owner:THE AZEK GROUP LLC

Gas engine lubricating oil composition and preparation method thereof

PendingCN120924330ALubricant compositionButanedioic acidAlkylphosphate
The invention provides a gas engine lubricating oil composition and a preparation method thereof. The gas engine lubricating oil composition of the present invention comprises: (A) an alkyl phosphate compound; (B) alkylated diphenylamine; (C) a polyisobutylene succinic acid pentaerythritol ester dispersing agent; (D) a salicylate and / or sulfonate; (E) zinc dialkyl dithiophosphate; (F) an oil-soluble organic molybdenum friction modifier; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a major amount of a lubricating base oil. The gas engine lubricating oil composition disclosed by the invention has excellent high-temperature oxidation resistance, cleaning performance, extreme pressure anti-wear performance and anti-corrosion performance.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Device and method for preparing isobutene and methanol by cracking methyl tert-butyl ether

The invention relates to a device and a method for preparing isobutene and methanol by cracking methyl tert-butyl ether. The device comprises a methyl tert-butyl ether vaporization refining tower, a reactor, a cooling tower, an absorption tower, a methanol extraction tower, an isobutene light component removal tower and an isobutene heavy component removal tower which are sequentially connected along a material conveying direction, a top discharge hole of the cooling tower is connected with a lower gas-phase material inlet of the absorption tower; an absorbent outlet at the bottom of the absorption tower is circularly connected with a cooling absorption liquid inlet at the top of the cooling tower; the bottom extract liquor outlet of the methanol extraction tower is circularly connected with the top absorbent inlet of the absorption tower; an isobutylene discharge hole is formed in the top of the isobutylene heavy component removal tower; the device further comprises a methanol recovery tower and a methanol refining tower which are connected in sequence along the material conveying direction; a bottom cooling absorption liquid outlet of the cooling tower is connected with the methanol recovery tower; a methanol discharge hole is formed in the bottom of the methanol refining tower. The device provided by the invention not only can relax the limitation of the purity of methyl tert-butyl ether in raw materials, but also can prepare high-purity isobutene and high-purity methanol at the same time.
Owner:SHANGHAI LANKE PETROCHEM ENG & TECH

Low-odor low-VOC (volatile organic compound) sidewall rubber composition, mixing method thereof and tire

The invention relates to the technical field of tire rubber manufacturing, and discloses a low-odor low-VOC sidewall rubber composition, a mixing method thereof and a tire, a brominated copolymer (BIMS) of isobutene and p-methylstyrene is adopted, and the use of an amine anti-aging agent is canceled; according to the invention, tetrabenzylthiuram disulfide (TBzTD) is adopted as a main accelerant, and a traditional sulfenamide accelerant is replaced; the softening and reinforcing resin is adopted to replace an oil softener, so that small molecular substances in aromatic hydrocarbon oil or naphthenic oil are prevented from being separated out, and phenol possibly generated by using phenolic resin is avoided; carbon black is matched with a small amount of white carbon black, so that odor molecules are effectively adsorbed; and the steps of lifting an upper top peg and opening a charging door for exhausting are added in the plastifying and mixing sections. The synergistic effect of the optimized formula raw materials effectively avoids the generation of odor molecules, the escape of a large number of VOC molecules is improved, and the exhaust step further reduces the residual quantity of the VOC molecules in the final mixed rubber, so that the odor grade of the tire is improved.
Owner:ZHONGCE RUBBER GRP CO LTD +1

Preparation method of hexafluoroisobutylene

The invention relates to a preparation method of hexafluoroisobutene, which comprises the following steps: in a protective atmosphere, mixing 3, 3, 3-trifluoro-2-(trifluoromethyl) propionic acid, 2, 2-dimethyl propionic acid, tetramethylammonium tetrafluoroborate and a solvent, reacting under a current condition, and purifying to obtain the hexafluoroisobutene. The preparation method is simple in process route and mild in reaction condition, metal ions are not introduced in the preparation process, and pollution is reduced; and the method is short in reaction time, environment-friendly and suitable for large-scale production.
Owner:LINGGAS MATERIALS TIANJIN LTD +1

Modified acidic resin catalyst and preparation method thereof, and method for continuously producing OTBP and 2, 4-DTBP

The invention discloses a modified acidic resin catalyst and a preparation method thereof, and a method for continuously producing OTBP and 2, 4-DTBP. The method comprises the following steps: taking phenol and isobutene as raw materials, under the catalysis of a modified acidic resin catalyst, specially designing a reactor into a two-section type, and reacting at a certain pressure and temperature. The modified acidic ion exchange resin catalyst is finally prepared by introducing a carbon chain of a sulfonic acid group to a benzene ring, introducing a macroporous nano material for chambering and changing an internal matrix channel structure, and then carrying out acidic and steam modification, so that the selectivity of the catalyst to target products OTBP and 2, 4-DTBP is greatly improved.
Owner:WANHUA CHEM GRP CO LTD

PE (polyethylene) protective film based on reclaimed materials and preparation method of PE protective film

The invention relates to the field of PE (polyethylene) protective films, and discloses a PE protective film based on reclaimed materials and a preparation method of the PE protective film. A PE protective film based on reclaimed materials is composed of a PE base material layer and a pressure-sensitive adhesive layer, and the PE base material layer is prepared from the following raw materials in parts by weight: 50-70 parts of a pretreated reclaimed PE material, 15-25 parts of PE resin, 10-20 parts of a flexibilizer, 3-5.5 parts of a filler, 3-6 parts of a compatilizer, 2-4 parts of a slipping agent, 1.5-3 parts of an antistatic agent and 1-2 parts of an antioxidant; preparation of a pretreated recycled PE material: crushing, pickling, mixing with a pretreating agent, melting, extruding and pelletizing; the pretreating agent is prepared from an isobutylene maleic anhydride copolymer, an ethylene-acrylate-methyl glycidyl ester terpolymer and dimer acid polyester polyol. The PE protective film is good in fitting stability, small molecule precipitation is not prone to being generated, oily residues are not prone to being generated during fitting, and the PE protective film is suitable for protection of precise electronic products.
Owner:DONGGUAN FUYING ELECTRONIC MATERIALS CO LTD

A catalyst for preparing tert-butyl ethylbenzene and ethylbenzene by alkylating tert-butanol with styrene, and a preparation method and application thereof

This invention discloses a catalyst for the alkylation of tert-butanol with styrene to prepare tert-butylethylbenzene and ethylbenzene, its preparation method, and its application. The catalyst consists of a support and active components loaded on the support. The active components are oxides of rare earth metals and high-valence oxides of transition metals. The support is H-β zeolite. The mass contents of the oxides of rare earth metals and high-valence oxides of transition metals on the support are 3-5% and 2-4%, respectively. This invention makes a breakthrough in the reaction mechanism by loading rare earth metals and transition metals onto a β-molecular sieve and using tert-butanol and styrene as raw materials for alkylation. This avoids the polymerization of styrene (raw material) and the dimerization of isobutylene (intermediate product), reduces the generation of by-products, and makes the catalytic process controllable.
Owner:THE NORTHWEST RES INST OF CHEM IND +1

Process for obtaining isobutene from a C4-hydrocarbon mixture

The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (10) and a second distillation unit (12), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether in the etherification unit (3); (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), and the alkyl tert-butyl ether being withdrawn as the bottom product (7); (c) vaporizing the bottom product from the first distillation unit (5) in an evaporator (8) obtaining a vapor stream (9); (d) reacting the vapor stream (9) of step (c) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (10); (e) distilling the reaction mixture (11) from the ether cleavage unit (10) in the second distillation unit (12), isobutene being withdrawn as the overhead product (13), the primary alcohol and diisobutene being withdrawn as the bottom product (14) and being recycled to the etherification unit (3); wherein a purge stream (15) containing high boiling components with a normal boiling point higher than that of the alkyl tert-butyl ether is withdrawn from the evaporator (8) in step (c).
Owner:BASF SE

Synthesis method of piperonone

The invention discloses a synthesis method of piperonone, and relates to the technical field of flavors, fragrances and chemical engineering, and the synthesis method comprises the following steps: taking acrylate as a raw material, and carrying out Michael addition reaction with isobutene under the action of Lewis acid to obtain 5-methyl-5-hexenoic acid ethyl ester; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on ethyl 5-methyl-5-hexenoate and bromoisopropane under the action of a basic catalyst to obtain ethyl 5-methyl-2-isopropyl-5-hexenoate; carrying out self Friedel-Crafts acylation reaction on the 5-methyl-2-isopropyl-5-hexenoic acid ethyl ester under the action of Lewis acid, so as to obtain 5-methyl-2-isopropyl-5-chloro cyclohexanone; and carrying out elimination reaction on the 5-methyl-2-isopropyl-5-chlorocyclohexanone under the action of alkali to obtain the product piperonone. According to the synthetic route, conventional chemical reagents are used as raw materials, reaction conditions are mild, emission of three wastes is reduced to a great extent, and the synthetic route is more environmentally friendly and suitable for continuous industrial production.
Owner:SICHUAN BOYUEHUI BIOTECHNOLOGY CO LTD

Method for producing gasolines or aromatic compound concentrates with different distribution of hydrocarbon, oxygenate and olefin-containing fractions to the reactor beds

The invention refers to the method for producing gasolines or aromatic compound concentrates, where three streams are used as feedstock, one of which includes hydrocarbon fraction, the second stream includes oxygenate, the third stream includes olefin-containing fraction with one or more olefins selected from the group consisting of ethylene, propylene, normal butylenes, isobutylene, in total from 10 to 50 wt %, and where three reaction zones filled with zeolite catalyst are used, with distribution of hydrocarbon fraction and oxygenate to the first reaction zone, and with olefin-containing fraction distributed over the three reaction zones, with the third stream mass fraction distributed to the final reaction zone higher than the mass fraction of the third stream distributed to each of the previous reaction zones. This method allows to increase the yield of C5+ hydrocarbons, enhance n-hexane and n-heptane conversion, reduce benzene content in the product, avoid recycling of gaseous products and decrease consumption of oxygenates. 1 independent claim and 35 dependent claims in the formula, 12 examples, 7 tables.
Owner:UNIVERSAL FUEL TECHNOLOGIES INC

Polyethylene fiber FDY spinning oil as well as preparation method and application thereof

The invention belongs to the technical field of spinning auxiliaries for synthetic fiber processing, and particularly relates to polyethylene fiber FDY spinning oil as well as a preparation method and application thereof. The polyethylene fiber FDY spinning oil comprises a smoothing agent, a wetting agent, an emulsifier, an antistatic agent, a functional additive, deionized water and a wear-resistant agent, wherein the wear-resistant agent is one or more of phenyl dicarbazole phosphate, sulfurized isobutylene and triphenyl phosphate, and the mass percentage content of the wear-resistant agent in the spinning oil agent is not greater than 5%. By adding the wear-resistant agent with appropriate variety and appropriate dosage, not only can the wear resistance of the spinning oil be improved, but also the wettability and stability of the spinning oil can be improved through the synergistic effect of the components. When the spinning oil is used for polyethylene fiber FDY spinning production, the problems of broken ends, white powder and the like in the spinning production process can be obviously improved, and meanwhile it is guaranteed that a polyethylene fiber filament product obtained through FDY processing has excellent quality.
Owner:HANGZHOU TRANSFAR CHEM LTD

An oily environment-friendly high-molecular anticorrosive waterproof coating and a preparation method thereof

The application provides an oily environment-friendly high-molecular anticorrosive waterproof coating and a preparation method thereof, and belongs to the technical field of coating compositions. The oily environment-friendly high-molecular anticorrosive waterproof coating is prepared from the following raw materials in parts by weight: SEPS 5-20 parts, polyisobutylene 1-15 parts, terpene resin 3-15 parts, poly-alpha-methylstyrene resin 1-12 parts, A81 resin 2-10 parts, inorganic filler 7-50 parts, defoaming agent 0.1-2 parts, antioxidant 0.1-2 parts, ultraviolet absorber 0.1-2 parts, light resistance agent 0.1-1 part, environment-friendly solvent 25-70 parts, and perfume 0-1 part. The oily environment-friendly high-molecular anticorrosive waterproof coating is waterproof, corrosion-resistant, environment-friendly and convenient to construct, and is suitable for application in surface protection of color steel tile and the like.
Owner:ZHENGZHOU ZHONGYV PAINTING TECH

Method for detecting detergent main agent in gasoline

The invention relates to a method for detecting a clearing agent main agent in gasoline, and the method comprises the following steps: carrying out thin-layer chromatography detection on a to-be-detected sample, and determining the composition of the clearing agent main agent in the concentrated to-be-detected sample according to color spot distribution on an obtained thin-layer chromatography plate, wherein the clearing agent main agent comprises one or more of a polyether amine clearing agent, a polyisobutene amine clearing agent and a Mannich base clearing agent; the thin-layer chromatography detection sequentially comprises developing and developing treatment; a developing agent for developing comprises one or more of a developing agent I, a developing agent II and a developing agent III; the developing solvent I is methanol, and the developing solvent II and the developing solvent III comprise one or more of alcohol with the carbon atom number of 1-6, aliphatic hydrocarbon with the carbon atom number of 5-12 and cycloalkane with the carbon atom number of 5-12. According to the method provided by the invention, whether the clearing agent main agent is added into the sample to be detected or not can be rapidly determined, and the type of the clearing agent main agent can be rapidly and accurately detected.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1