21 results about "Hydrocarbon solvents" patented technology

This application discloses an integrated cleaning device, relating to the field of cleaning equipment, comprising a frame; a loading rack installed at one end of the frame; a unloading rack installed at the other end of the frame; a transfer mechanism installed on the frame and used for transferring optical components; a hydrocarbon cleaning unit installed on the frame and adjacent to the loading rack, the hydrocarbon cleaning unit being used to clean optical components using hydrocarbon solvents; and an HFE cleaning unit installed on the frame and adjacent to the unloading rack. This application reduces the footprint by integrating the hydrocarbon cleaning unit and the HFE cleaning unit onto the frame; it reduces mutual interference and improves safety by physically isolating the hydrocarbon cleaning unit and the HFE cleaning unit with partitions; and it prevents large amounts of hydrocarbon solvent from entering the next process by using air knife purging, greatly reducing the contamination load of subsequent HFE solvents and minimizing cross-contamination.

To provide a lightweight fiber-reinforced molded body. [Solution] A method for producing a fiber-reinforced molded article, comprising the steps of: preparing a mixture containing a first polymerizable monomer, a hydrocarbon solvent, a dispersion stabilizer, and an aqueous medium; preparing a suspension by suspending the mixture; and subjecting the suspension to a polymerization reaction, wherein the mixture contains a crosslinkable monomer as the first polymerizable monomer, the content of the crosslinkable monomer in 100 parts by mass of the first polymerizable monomer is 80 parts by mass or more, and when the polymerization conversion rate of the first polymerizable monomer reaches 93% by mass or more, a second polymerizable monomer having a solubility of 0.3 g / L or more in distilled water at 20°C is added and subjected to a further polymerization reaction to produce hollow particles; preparing a resin composition containing the obtained hollow particles, a matrix resin, and a solvent; and impregnating reinforcing fibers with the resin composition.

This invention specifically relates to a boron-oxygen ligand-stabilized rare-earth or alkaline-earth metal catalyst, its preparation method, and its application, belonging to the field of catalyst synthesis technology. The catalyst has the structure shown in Formula I, where M is a rare-earth or alkaline-earth metal ion and D is an ether or pyridine ligand. The preparation method involves reacting a boron-oxygen ligand with a rare-earth alkyl or amino compound, or an alkaline-earth metal amino compound, in a hydrocarbon solvent, followed by post-treatment to obtain the target catalyst. This method has few steps, is simple to operate, and yields catalysts with diverse structures, exhibiting excellent catalytic activity and stability. The catalyst of this invention is used to catalyze the trimerization of isocyanates to prepare isocyanurates, offering advantages such as simple activation, high catalytic activity, mild reaction conditions, low catalyst dosage, and a wide range of applicable substrates. It overcomes the shortcomings of traditional catalytic systems, such as poor stability, large dosage, harsh reaction conditions, and low conversion rates, demonstrating promising industrial application prospects.

A thermoplastic resin composition containing: a thermoplastic resin (L); a paraffin-based hydrocarbon solvent (M); and a styrene-based elastomer (N), wherein the thermoplastic resin (L) is one or more selected from the group consisting of a polycarbonate resin and a resin containing, as structural units, a rubber-based polymer, a vinyl cyanide-based monomer, and an aromatic vinyl-based monomer, the paraffin-based hydrocarbon solvent (M) has an aniline point of 110°C or higher, and the styrene-based elastomer (N) is a block copolymer containing a polymer block having polystyrene and a polymer block having a conjugated diene compound. The thermoplastic resin composition has excellent silent properties while maintaining or improving the low-temperature impact resistance of the thermoplastic resin.

The present invention relates to a cleaning agent composition which is excellent in cleaning property and does not corrode plastic substrates such as polycarbonate and polystyrene which are not resistant to solvents. The cleaning agent composition of the present invention comprises the following (A) to (C) components, the mass ratio of the (A) component and the (B) component being 11:89 to 99:1, (A) cis-1-chloro-3,3,3-trifluoropropene, (B) one or more compounds selected from the group consisting of hydrofluoroolefins, hydrofluorocarbons and hydrofluoroethers which do not contain a chlorine atom, and (C) a hydrocarbon solvent.

The application provides a preparation method of solution polymerized styrene-butadiene rubber, and the method comprises the following steps: in the presence of a hydrocarbon solvent, an organic lithium is used as an initiator, an ether compound is used as a random aid, an anionic copolymerization reaction of a monovinyl aromatic compound and a conjugated diene compound is carried out, after the monomer conversion rate reaches more than 95%, a mixture of nitrogen-containing star-shaped and linear coupling agents is added, the molar ratio of the two coupling agents is 1:(1.5-15), and then antioxidants, a terminating agent, flocculation, drying and other steps are added to obtain the solution polymerized styrene-butadiene rubber product. The solution polymerized styrene-butadiene rubber with a relatively wide three-peak molecular weight distribution is obtained under the action of the special composite coupling agent, so that the processing performance of the rubber is improved; the rubber matrix after nitrogen functionalization can obviously improve the dispersity of carbon black therein, fully plays the reinforcing role of the carbon black, obviously improves the tensile strength of the rubber compound, and can make the tire simultaneously obtain excellent characteristics of low rolling resistance and high anti-wet skid resistance.

The present invention relates to a tris(hydroxymethyl)aminomethane hydrochloride preparation method and, specifically, to a high-purity tris(hydroxymethyl)aminomethane hydrochloride preparation method, which does not use a main solvent, and thus is economical and eco-friendly. The tris(hydroxymethyl)aminomethane hydrochloride preparation method of the present invention exhibits a high conversion rate and selectivity, and provides an economical and eco-friendly preparation method by establishing a solvent recovery and reuse system that recirculates a hydrocarbon solvent, which is an antisolvent, during crystallization, and minimizes solvent loss.

This invention provides a method for decolorizing a steroid intermediate dihydroxy compound, relating to the field of pharmaceutical and chemical technology. The method includes: dissolving the crude dihydroxy compound in a halogenated hydrocarbon solvent; adjusting the pH of the system to 8.0-9.5 with an inorganic base; adding an aqueous sodium hypochlorite solution for chemical oxidation decolorization while maintaining this pH value; determining the reaction endpoint by monitoring color change or redox potential; adjusting the pH after the reaction with a weak acid, followed by separation, concentration, and crystallization to obtain the final product. This invention utilizes the selective oxidation effect of sodium hypochlorite in a specific pH buffer system, replacing the traditional physical adsorption decolorization with activated carbon. While effectively removing fermentation pigments, it avoids the oxidative damage of the 11-hydroxyl group in the steroid skeleton. The product has high purity, produces no waste activated carbon solid waste, is simple to operate, and is easily scaled up industrially.

The application discloses a synthesis method of 4-(aminoalkyl) benzene sulfonic acid compound and relates to the technical field of organic synthesis. Benzylamine or phenethylamine is dissolved in a halogenated hydrocarbon solvent, the temperature is lowered to 0-5 DEG C, chlorosulfonic acid is added dropwise for sulfonation reaction, after dropwise addition is completed, the temperature is raised to 40-65 DEG C for reaction until the raw material is completely reacted, the temperature is lowered to 0-5 DEG C, then C1-C4 alcohol solvent containing trace moisture is added into the reaction system as a quenching agent for quenching, after quenching, the halogenated hydrocarbon solvent is recovered by distillation, the remaining substance is cooled, crystallized, filtered and dried, and 4-(aminoalkyl) benzene sulfonic acid is obtained. In the application, n-butanol containing trace moisture (0.5-8%) is used as a quenching agent, the reaction of chlorosulfonic acid and water is diluted and buffered by alcohol, the heat release is gentle, there is no risk of material shock, and the operation safety is far superior to traditional ice water quenching.

To provide a curing agent for epoxy resins that exhibits good curing properties at low temperatures, has excellent surface gloss in the resulting cured product, and leaves minimal traces of water droplets. [Solution] An epoxy resin curing agent containing as essential components a condensate (A) of an amine compound (a) having at least two primary amino groups in one molecule, formaldehydes (b), and a phenol compound (c) which may have an alkyl group having 1 to 12 carbon atoms, a petroleum resin (B) which is a C5-9 aromatic hydrocarbon fraction polymer, a hydrocarbon solvent (C) with a boiling point of 150°C or higher, and a compound (D) having a tertiary amino group, wherein the mass ratio of each component is in the range of condensate (A) / petroleum resin (B) = 1 to 10, petroleum resin (B) / hydrocarbon solvent (C) = 0.5 to 2.0, and condensate (A) / compound (D) = 1.5 to 4.5.

This invention belongs to the field of lithium industry technology, and particularly relates to an alkyl lithium filtration process, comprising the following steps: Step 1: Under the protection of argon gas, lithium metal particles and hydrocarbon solvent are added to a washing vessel, allowing the lithium metal particles to be washed to remove surface impurities; Step 2: Under the protection of argon gas, the washed lithium metal particles are added to a synthesis vessel, followed by the addition of hydrocarbon solvent, and the total solvent volume is adjusted to a specified value; Step 3: Chlorinated alkanes are added to the synthesis vessel using a mixed droplet method, and the chlorinated alkanes react fully with the lithium metal particles and hydrocarbon solvent in the reaction vessel at a specific temperature. When filtering the alkyl lithium solution, as the drive shaft rotates forward, the alkyl lithium solution sprayed through the through-holes on the drive shaft can be evenly sprayed onto the surface of the rotating sintered mesh filter element, thereby improving the filtration effect of the sintered mesh filter element on the alkyl lithium solution.

The invention relates to the technical field of preparation of polymer microspheres, and discloses a production method and a production system of polymer microspheres, the production method comprises the following steps: (1) in the presence of a mixed solvent, mixing a first monomer, a second monomer and an initiator, and carrying out a polymerization reaction to obtain a polymerization mother solution containing the polymer microspheres; wherein the mixed solvent comprises an ester solvent, a hydrocarbon solvent and a ketone solvent; (2) evaporating and drying the polymerization mother liquor to obtain a gas-phase mixed solvent and polymer microspheres; (3) condensing and optionally separating the gas-phase mixed solvent, and then returning to the step (1); wherein the first monomer has a structure as shown in a formula (i), and R1 is hydrogen or methyl; the second monomer is substituted or unsubstituted aromatic hydrocarbon and / or olefin. According to the method, the polymerization mother liquor can be fully utilized, the quality of the prepared polymer microspheres is improved, the surface of the product is clean, and the particle size of the product is uniform.

The present invention provides: a metal ion extraction method for extracting metal ions into an oil phase by mixing an aqueous phase containing metal ions with an oil phase containing an extraction agent, and then separating the phases, the oil phase containing at least one solvent selected from hydrocarbon solvents containing aliphatic hydrocarbons represented by the formula CnH(2n+2) (where n is an integer between 19 and 40) and edible oils, the metal ion extraction method satisfying condition A and / or B below; and an oil phase to be used in a metal ion extraction method, the oil phase containing an extraction agent and at least one solvent selected from the above hydrocarbon solvents and edible oils.　Condition A: The aqueous phase and the oil phase are merged in mid-circulation, and both phases are mixed. Condition B: The mixing temperature of the aqueous phase and the oil phase is between 40°C and 95°C.

Non-aqueous emulsion methods for producing polymeric or polymer-coated microparticles are provided. One method produces a sustained release microparticle composition by combining protein powder and a polymer into a hydrocarbon solvent to form a non-aqueous first solution and adding the first solution to a second solution, wherein the second solution comprises a fluorocarbon liquid and a fluorosurfactant to form a non-aqueous emulsion comprising multiple emulsion hydrocarbon droplets in the fluorocarbon liquid. The subsequent microparticle hardening process includes the steps of removing the hydrocarbon solvent from the formed emulsion droplets, which can be achieved through evaporation the hydrocarbon at ambient condition under stirring, or accelerated hardening through vacuum, or through adding hydrofluoroester into the fluorocarbon as a cosolvent. Removing the fluorocarbon liquid and washing with extra fluorocarbon liquid to isolate the sustained release microparticles, wherein the sustained release microparticles comprise one or more cores of protein and a cortex of polymer.

Water-in-oil (W / O) emulsion compositions having freeze-thaw stability are provided which include water, at least one hydrocarbon solvent, at least one nonionic emulsifier, and at least one freeze-thaw stabilizer which either prevents breaking of the emulsion after a freeze-thaw cycle or enables the emulsion to be re-formed following breaking after a freeze-thaw cycle by simple shaking of the emulsion composition. Preferred freeze-thaw stabilizers are polyols (e.g., glycerin), sugars (e.g., sucrose), polar aprotic solvents (e.g., dimethyl sulfoxide) and amphoteric compounds (e.g., lauryl dimethyl amine oxide). The freeze-thaw stabilizers are particularly useful in furniture care, shoe care and auto care cleaning and / or polishing products including therein water, hydrocarbon solvent(s), nonionic emulsifier(s) and additives, such as film former(s), surfactant(s), fragrance component(s) and preservative(s).

This invention relates to the field of liquid polybutadiene technology, and particularly to a method for preparing high-vinyl liquid polybutadiene and its application. The method includes the following steps: adding a non-polar hydrocarbon solvent and butadiene monomer to a polymerization reactor, mixing them uniformly to obtain a butadiene monomer mixed solution; sequentially adding a structure-modifying component and an initiating component to the butadiene monomer mixed solution to initiate a polymerization reaction; after the polymerization reaction is completed, releasing the gel, and removing the solvent, organolithium initiator, and composite structure modifier from the gel to obtain the high-vinyl liquid polybutadiene product. This invention achieves the preparation of high-vinyl liquid polybutadiene with an ultra-low number-average molecular weight, while simultaneously possessing a high vinyl content and a narrow molecular weight distribution index, meeting the requirements for low-loss, high-frequency, and high-speed copper-clad laminate matrix materials, thus enabling better application in the field of low-loss, high-frequency, and high-speed copper-clad laminates.

In some embodiments, the method includes introducing an aqueous solution into a first hydrocarbon solvent to form an emulsion, wherein the aqueous solution comprises a solution containing an oxidant and a solution containing a surfactant. The method further includes introducing an adhesive together with the emulsion to form a first mixture within a reactor, wherein the adhesive comprises a butyl rubber elastomer and a second hydrocarbon solvent that is the same as or different from the first hydrocarbon solvent. The method further includes introducing a halogen source together with the first mixture contained within the reactor to form a second mixture comprising a halogenated butyl rubber elastomer. The method further includes introducing a neutralizing agent together with the second mixture to form a third mixture. The method further includes isolating the halogenated butyl rubber elastomer from the third mixture.

This invention provides a method for preparing tris(dimethylamino)cyclopentadienyl zirconium. Using this method, both high yield and purity of the target product can be achieved, and high yield / purity can be maintained during repeated batch production. The method includes the following steps: S1, cooling a hexane solution of n-butyllithium in a reactor, then introducing dimethylamine gas and stirring the reaction at room temperature to obtain solution A; S2, dissolving zirconium tetrachloride in a hydrocarbon solvent, then cooling and crystallizing to obtain recrystallized zirconium tetrachloride crystals; heat-treating the zirconium tetrachloride crystals; heat-treating the dicyclopentadienyl zirconium dichloride crystals; refluxing the zirconium tetrachloride crystals and dicyclopentadienyl zirconium dichloride crystals to obtain solution B; S3, mixing solutions A and B and stirring the reaction at room temperature to obtain a reaction solution; S4, filtering the reaction solution using a filter cartridge, and subjecting the filtrate to heating distillation and vacuum distillation; S5, post-processing the filter cartridge.

This invention discloses a modified hydrocarbon liquid film-removing and adhesive-removing agent, its preparation method, and its application. The formulation of this invention is rational, using a pure hydrocarbon system as a base. It softens the aged adhesive layer through a polar penetration aid and adds a hydrocarbon-compatible low-surface-tension stripping agent and an anti-redeposition agent. This rapidly softens the cross-linked adhesive layer at room temperature or low temperature, achieving complete peeling of the protective film without residue or substrate damage. It effectively overcomes the shortcomings of traditional hydrocarbon solvents, such as weak penetration and slow adhesive removal of aged adhesive layers. Simultaneously, it retains the safe and environmentally friendly characteristics of the hydrocarbon system, including non-toxicity, non-corrosiveness, non-swelling of the film, and high flash point. It comprehensively solves the defects of water-based, strong solvents, and ordinary hydrocarbons, achieving efficient, complete film peeling at room temperature, without residue or damage to the substrate—an industrial-grade film removal effect. It is not only suitable for new films but also excels at treating stubborn protective films after high-temperature baking and UV aging. It has a wide range of applications and extremely high economic and environmental benefits.

This invention provides a cerium valence regulator for high-abundance cerium magnets and a method for preparing high-abundance cerium magnets, belonging to the field of rare earth permanent magnet technology. The cerium valence regulator for high-abundance cerium magnets provided by this invention comprises the following components by volume percentage: hydroxylamine hydrochloride 1-10%; tributyl phosphate 5-8%; and the balance being hydrocarbon solvent. In this invention, hydroxylamine hydrochloride facilitates the regulation of cerium valence, while tributyl phosphate plays a stabilizing role in the cerium valence regulator. Using the cerium valence regulator provided by this invention, it is possible to prepare high-abundance, high-performance cerium magnets with a 50% cerium-to-praseodymium / neodymium weight percentage, remanence Br ≥ 12 kGs, and intrinsic coercivity Hcj ≥ 12 kOe. Compared with current technologies, the high-abundance cerium permanent magnets obtained by this invention have approximately 30% higher trivalent cerium content, approximately 1.5% higher remanence Br, and approximately 8% higher coercivity.

Processes are disclosed for preparing at least one aldehyde under hydroformylation temperature and pressure conditions, comprising contacting at least one olefin with hydrogen and carbon monoxide in the presence of at least one hydrocarbon solvent or fluorinated solvent and a transition metal-based catalyst composition comprising a phospholane-phosphite ligand.