9 results about "N-Octyl Alcohol" patented technology

The invention relates to a quaternary ammonium salt collecting agent for reverse flotation of refractory hematite at room temperature and application of the quaternary ammonium salt collecting agent, the quaternary ammonium salt collecting agent is structurally a cationic compound with an ester group, n-caprylic alcohol and chloroacetic acid react to obtain octyl chloroacetate, and then the octyl chloroacetate reacts with tertiary amine. The molar ratio of n-caprylic alcohol to chloroacetic acid is 1: (1.05-1.15), the reaction temperature is 80-90 DEG C, and the reaction time is 7-9 hours; the molar ratio of the octyl chloroacetate to the tertiary amine compound is 1: (1.1-1.3), the reaction temperature is 70-90 DEG C, and the hematite room-temperature reverse flotation quaternary ammonium salt collecting agent is obtained by reacting in an acetonitrile solvent for 2-6 hours. The quaternary ammonium salt collecting agent with the ester group is independently applied to room-temperature reverse flotation of the refractory hematite.

The invention discloses a preparation method of iso-octyl p-methoxycinnamate, which comprises the following steps: mixing iso-octyl acetate, p-methoxybenzaldehyde and a solid catalyst for reaction, and controlling the water content of the iso-octyl acetate to be less than or equal to 0.15% to obtain a reaction material; and carrying out purification treatment on the reaction material to obtain the iso-octyl p-methoxycinnamate product. According to the method disclosed by the invention, in a process for synthesizing iso-octyl p-methoxycinnamate by taking iso-octyl acetate and p-methoxybenzaldehyde as raw materials, the solid catalyst is adopted, so that the introduction of solvents such as alcohols and water is avoided, the occurrence of side reactions is reduced, the content of by-products of the iso-octyl p-methoxycinnamate is reduced, the purification difficulty and cost of the product are reduced, and the yield of the iso-octyl p-methoxycinnamate is increased. And the product purity and yield are improved.

The application relates to a compound collector and application thereof in zinc oxide ore flotation, and belongs to the technical field of mineral processing. The compound collector is composed of mixed amine, mixed alcohol, hydrocarbon oil and emulsifier, the mixed amine includes laurylamine and N-dodecyl ethanolamine, the mixed alcohol includes glycerol and n-octanol, the hydrocarbon oil includes kerosene and diesel, and the emulsifier includes sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and dodecyl phenol polyoxyethylene ether; the zinc oxide ore flotation process includes twice roughing, once scavenging, twice cleaning and once cleaning scavenging, the middlings are not returned to the roughing and cleaning operations, the ore is subjected to crushing, grinding, reagent adding and pulp conditioning, and then is subjected to flotation to obtain zinc concentrate and flotation tailings. The compound collector has high selectivity, high collecting capacity, small flotation foam amount, good fluidity, stable process flow, can avoid the influence of slime on the roughing and cleaning indexes, improves the stability and viscosity of the foam layer, and improves the flotation recovery indexes of the zinc oxide ore.

The invention discloses a sunscreen synergistic composition as well as a preparation method and application thereof, and belongs to the technical field of daily chemicals. The sunscreen synergistic composition comprises a composite light stabilizer and physalis pubescens juice, the composite light stabilizer comprises butyl octanol salicylate, an acrylic acid (ester) copolymer, 2, 6-diethyl hexyl naphthalate and caprylic / capric triglyceride. The compound light stabilizer obtained by compounding butyl octanol salicylate, acrylic acid (ester) copolymer, 2, 6-diethyl hexyl naphthalate and caprylic / capric triglyceride can improve the conversion rate of the sun-screening agent; energy generated by the sun-screening agent capable of absorbing light in an excited state can be removed through an energy transfer and / or electron transfer quenching mechanism, and photodegradation and formation of reactive oxygen free radicals are reduced; the physalis pubescens juice is added and compounded with the compound light stabilizer, so that the light absorption capacity of the sun-screening agent is improved, the sun-screening value is further increased, meanwhile, skin problems are reduced, and heat damage is reduced.

The invention belongs to the technical field of manganese compound preparation methods, and particularly relates to a method for preparing battery-grade manganese carbonate by using waste manganese liquid. The method comprises the steps of pretreatment of waste manganese liquid, extraction separation, reverse extraction recovery and preparation of manganese carbonate. According to the core technology, a ternary compound organic extraction system composed of di (2-ethylhexyl) phosphoric acid (P204), sec-octyl alcohol and trioctyl phosphate (TOPO) or N-octyl pyridone (NOP) is adopted, in the system, P204 serves as a main extraction agent and is matched with a synergistic ligand TOPO or NOP to enhance the selectivity, a diluent sec-octyl alcohol is used for improving the compatibility, co-extraction of impurity ions such as Fe < 3 + > and Cu < 2 + > can be remarkably inhibited through the synergistic effect of P204, sec-octyl alcohol and the like, and the extraction efficiency is improved. And the manganese extraction purity and efficiency are improved. After two-stage countercurrent reverse extraction treatment, manganese ions are enriched in a water phase, and manganese carbonate crystals with uniform particle size and relatively high purity are prepared through a sodium carbonate precipitation method. The method realizes high-value recovery of valuable metals in the waste liquid, is green and efficient in process, and is suitable for waste battery recovery and battery material manufacturing industry.

The invention relates to the field of glue preparation, in particular to a high-strength glue preparation system and method.The high-strength glue preparation method comprises the following steps that S1, water and polyvinyl alcohol are added into a mixing device, raw materials are made to flow back and forth to be fully stirred and mixed till the polyvinyl alcohol is completely dissolved, and a mixed solution A is obtained; s2, under the stirring condition, adding part of the emulsifier into the mixed solution A, then slowly adding vinyl acetate and an initiator, and continuously stirring to obtain a mixed solution B; s3, after the mixed solution B is cooled, adding sodium bicarbonate, dibutyl phthalate, diethylene glycol dibenzoate, octanol and isopropanol under a stirring condition, and uniformly mixing to obtain a mixed solution C; and S4, adding the residual emulsifier, allyl methacrylate, glycol dimethacrylate and toluene diisocynate into the mixed solution C, uniformly stirring and mixing, preserving heat at 45 DEG C, and cooling to room temperature to obtain the high-strength glue. The mixing device is used for enabling raw materials to flow back and forth to be fully stirred and mixed.

This invention relates to catalysts, preparation methods, and applications for the one-pot catalytic oxidation of primary alcohols to esters using oxygen. The catalyst is a zinc-cobalt composite oxide, denoted as Zn-CoO, obtained by stepwise calcination of a Zn-doped modified ZIF-67 precursor. x The morphology is basically rhombic dodecahedral with a slightly concave surface, and the particle size is 0.8~1.2 μm. The primary alcohol as the reaction substrate is added to the reaction solvent, followed by the catalyst Zn-CoO. x The reaction involves the use of N-hydroxyphthalimide as a co-catalyst, with oxygen introduced into the solution during the reaction. The ester product is then separated after the reaction. This invention exhibits excellent catalytic performance for a variety of typical primary alcohols. The esterification yields are as follows: n-propanol oxidative esterification yield reaches 85.6%, n-butanol 97.0%, cyclohexylmethanol 89.9%, n-octanol 80.8%, and benzyl alcohol up to 96.0%. It demonstrates broad applicability and high selectivity for straight-chain aliphatic primary alcohols, cycloalkyl methanols, and aromatic primary alcohols.

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of 2-(4-chloro-2-methyl phenoxy) n-octyl propionate. The synthesis method comprises the following steps: (1) in the presence of a Lewis acid catalyst, taking D (+)-lactide and sodium octanoate to carry out ring-opening reaction to obtain (2R)-2-octyl hydroxypropionate; and (2) in the presence of a copper catalyst and an inorganic base, carrying out an O-arylation coupling reaction on the (2R)-2-octyl hydroxypropionate and 4-chloro-2-methylphenol to obtain the 2-(4-chloro-2-methylphenoxy) n-octyl propionate. According to the invention, a two-step method route of metal-catalyzed ring opening and copper-catalyzed O-arylation is creatively adopted, and a brand-new technical thought which is simple, efficient and good in optical selectivity is provided for synthesis of chiral phenoxy carboxylic ester.

The invention relates to the technical field of perfumes and organic synthesis, and discloses a high-efficiency peach aldehyde synthesis process capable of recycling n-caprylic alcohol, which comprises the following steps: by taking the n-caprylic alcohol accounting for 80-90% of the total feeding amount as a kettle bottom material, carrying out nitrogen replacement, and then adding a catalyst; mixing the residual n-caprylic alcohol, all the methyl acrylate and all the di-tert-butyl peroxide in another set of closed batching system with stirring and temperature control functions to form a dropwise-added mixed solution, carrying out a controllable free radical addition reaction at 178 + / -2 DEG C, and efficiently recovering the unreacted n-caprylic alcohol through high-vacuum rectification; the residual material containing the peach aldehyde is rectified under reduced pressure and neutralized and stabilized through triethanolamine, a crude product with the content larger than or equal to 90% is obtained, the crude product is subjected to high-vacuum precise fractionation, the reflux ratio is controlled through a program, a peach aldehyde finished product with the purity larger than or equal to 97% is finally obtained, and recycled n-caprylic alcohol is returned to a production system for recycling. Finally, the problems of high unit consumption of n-caprylic alcohol, difficulty in recovery, insufficient reaction control precision, high energy consumption of product separation and purification and large loss in the traditional process are solved.