14 results about "Ethyl hydroperoxide" patented technology

The present application provides thiamine compounds shown in formula (I) and application thereof. The thiamine compounds of the present application can be used for preparing polyolefin antioxidants. The thiamine compounds of the present application introduce sulfide bonds in aryl secondary amine, so that the antioxidant contains naphthylamine groups of primary antioxidants and sulfide groups of auxiliary antioxidants, which not only can terminate free radicals by providing hydrogen protons, but also can react with hydroperoxides, so as to achieve the dual effects of primary and auxiliary antioxidants, and thus the antioxidant effect is significantly enhanced.

The invention relates to fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite and a preparation method and application thereof, ions in the cobalt nickel-aluminum hydrotalcite are Co < 2 + >, Ni < 2 + > and Al < 3 + > respectively, and a fluorocarbon chain is prepared from at least one compound in formulas (I)-(III); comprising the following steps: S1, stirring and mixing a Co < 2 + > aqueous solution, a Ni < 2 + > aqueous solution, an Al < 3 + > aqueous solution and a urea aqueous solution in an inert gas atmosphere, then carrying out a hydrothermal reaction, and after the reaction is finished, carrying out post-treatment to obtain cobalt nickel-aluminum hydrotalcite; and S2, dispersing the cobalt nickel-aluminum hydrotalcite in anhydrous toluene, reacting the cobalt nickel-aluminum hydrotalcite with at least one compound in formulas (I)-(III) under the action of triethylamine in an inert gas atmosphere, and after the reaction is finished, performing post-treatment to obtain fluorocarbon chain modified cobalt nickel-aluminum hydrotalcite, the hydrotalcite is applied to preparation of naphthenic alcohol and naphthenic ketone by catalyzing partial oxidation of naphthenic hydrocarbon. The method has the advantages of high selectivity, high product yield, low content of naphthenic hydroperoxide in the reaction process, and high operation safety.

A titanium-containing silicon oxide capable of producing an epoxide in a high yield when used as a catalyst in a reaction for producing an epoxide from an olefin and a hydroperoxide, in which the titanium-containing silicon oxide satisfies all conditions 1 to 5: Condition 1: an average pore diameter is 10 or more; condition 2: 80% or more of the total pore volume has a pore diameter of 5-200; condition 3: the total pore volume is 0.2 cm3 / g or more; condition 4: the D50 of the titanium-containing silicon oxide is from 1.00 mm to 3.30 mm. And Condition 5: the (D90-D10) / D50 of the titanium-containing silicon oxide is 0.35-1.00.

The present invention relates to processes for preparing propylene oxide, comprising reaction of propene with ethylbenzene hydroperoxide in the presence of a catalyst, as well as to catalysts employed in such processes and to methods for their manufacture. The catalysts of the invention are prepared in a process comprising sol-gel-synthesis of catalyst hydrogel-precursor, drying of catalyst hydrogel precursor, calcining of dried catalyst hydrogel-precursor, and optionally hydrophobizing the calcined catalyst hydrogel-precursor. The catalysts of the invention comprise amorphous titanium doped silica comprising pentahedrally coordinated titanium species.

The invention relates to a preparation method of a bio-based 1, 5-pentamethylene diisocyanate product with yellowing resistance and high stability. A synergistic composite stable system composed of an efficient main antioxidant, an auxiliary antioxidant and a plurality of ultraviolet absorbents / light stabilizers in a scientific proportion is constructed. Wherein the main antioxidant is mainly used for capturing free radicals and blocking an oxidation chain reaction; the auxiliary antioxidant decomposes hydroperoxide to inhibit the hydroperoxide from further initiating the degradation of the material; the ultraviolet stabilizer effectively delays the color change process caused by illumination by absorbing or quenching excited state energy. The preparation method disclosed by the invention has the advantages of high process compatibility, easiness in acquisition of auxiliaries, simple compounding and post-treatment steps and convenience in large-scale popularization; the environmental protection property is outstanding, the yellowing resistance and the storage stability of the product are greatly improved, the normal-temperature closed storage period is prolonged to 6 months or above, the NCO content retention rate is greater than or equal to 96%, and the storage and transportation cost is reduced; the influence of thermal oxidation and photodegradation is resisted, and a complex application environment is adapted.

The invention relates to the technical field of rotational molding processing, and discloses an energy-saving rotational molding processing polyethylene blending composition and a preparation method thereof.The energy-saving rotational molding processing polyethylene blending composition is prepared from 100 parts of polyethylene, 0.02-0.1 part of a main antioxidant, 0.05-0.5 part of a methylene auxiliary and 0.06-1 part of an auxiliary antioxidant, and the auxiliary antioxidant is one or two of a phosphite antioxidant and a thioester antioxidant; the methylene auxiliary agent comprises one or more of allyl methylene and benzyl methylene; according to the composition, the methylene auxiliary agent and the auxiliary antibody are adopted, the methylene auxiliary agent can consume oxygen in a targeted mode to form hydroperoxide, the auxiliary antibody can rapidly decompose the hydroperoxide to form bound oxygen, after oxygen is consumed, the internal and external pressure difference of bubbles is increased, and the increased pressure difference can advantageously drive the bubbles to be discharged from high-viscosity polyethylene; bubble discharge is remarkably accelerated, insoluble impurities are not introduced, PIAT is remarkably reduced, and energy consumption of polyethylene rotational molding processing is remarkably reduced.

Crosslinked polymeric particles obtainable by copolymerization, in the presence of a chain transfer reagent, of at least one difunctional radically polymerizable monomer, optionally at least one monofunctional radically polymerizable monomer and at least one thiourea derivative according to the following Formula (I):in which R is an (n+1)-valent, aromatic, aliphatic, linear or branched C1-C50 hydrocarbon radical, which can be interrupted by one or more, preferably 1 to 8, particularly preferably 1 to 6, ether, thioether, ester, amide or urethane groups; PG is a radically polymerizable (meth)acrylate, (meth)acrylamide or vinyl group and n is 1 or 2. In combination with a hydroperoxide, the crosslinked polymeric particles are suitable as redox initiator system for the free-radical polymerization of compositions comprising at least one radically polymerizable monomer. These compositions are particularly suitable as dental materials.

The invention relates to an anti-wear lubricating oil composition and a preparation method thereof, and belongs to the technical field of high polymer materials. The anti-wear lubricating oil composition is prepared from the following components in parts by weight: 50 to 90 parts of poly-alpha-olefin base oil, 20 to 40 parts of pentaerythritol fatty acid ester, 0.05 to 0.5 part of silicone oil, 0.1 to 5 parts of a modified anti-wear agent, 0.1 to 3 parts of a modified antioxidant and 4 to 10 parts of a viscosity regulator, oxygen atoms of ester groups in the modified anti-wear agent compound are high in polarity and are adsorbed on the metal surface to form a lubricating layer, propylene glycol monomethyl ether solubilizes the base oil, transition chemical bonds are formed through intermolecular acting force, and a lubricating protective film is generated to improve the tribological performance; phosphorus atoms in the modified antioxidant stabilize phenoxy free radicals, the phosphorus group steric hindrance effect slows down self-degradation, phosphite ester decomposes hydroperoxide, and the stability of the lubricating oil is improved. The anti-wear lubricating oil composition prepared by the invention not only has a good anti-wear effect, but also has an excellent anti-oxidation effect.

The invention relates to the technical field of edible oil, in particular to antioxidant edible oil as well as a preparation method and application thereof. The antioxidant edible oil is prepared from the following components: grease, an enzymatic xanthan gum-tea polyphenol compound, ascorbyl palmitate, vitamin E, astaxanthin, a phospholipid-selenium nanoparticle compound and a pigment. An enzyme catalysis xanthan gum-tea polyphenol compound is introduced to construct a stable interface isolation layer on the surface of edible oil, a physical film greatly delays diffusion and invasion of oxygen, and tea polyphenol molecules exposed at an interface can directly and efficiently remove interface free radicals; meanwhile, a phospholipid-selenium nanoparticle compound is introduced to construct an efficient catalytic regeneration system in an oil phase, the selenium nanoparticles catalyze and decompose hydroperoxide to block generation of new free radicals, and the selenium nanoparticles are matched with ascorbyl palmitate to realize reduction regeneration, so that an internal antioxidant system of the edible oil is formed; therefore, the oxidation resistance of the feed edible oil is enhanced.

The invention relates to the technical field of shampoo, in particular to anti-hair-loss and hair-care shampoo and a preparation method thereof. Comprising sodium laureth sulfate, cocamidopropyl betaine, polysorbate 80, adenosine, sulfydryl polyethylene glycol modified beta-cyclodextrin, selenized maleimide modified polyvinyl alcohol, propyl gallate, sodium chloride, phenoxyethanol, citric acid and essence. According to the anti-hair loss shampoo disclosed by the invention, the problem that adenosine is continuously damaged by hydroperoxide generated by automatic oxidation of polysorbate 80 in an existing anti-hair loss shampoo formula is effectively solved through three components, namely the sulfydryl polyethylene glycol modified beta-cyclodextrin, the selenized maleimide modified polyvinyl alcohol and the propyl gallate.

The present invention is a composition comprising a) an aqueous dispersion of polymer particles optionally functionalized with structural units of a phosphorus acid monomer and having a z-average particle size as measured using dynamic light scattering in the range of from 50 nm to 500 nm; b) a C4-C10-alkyl hydroperoxide; c) a C8-C10-alkyl phosphate or sulfate; with the proviso that when the polymer particles are not functionalized with structural units of the phosphorus acid monomer, the composition further comprises d) a hydrotrope. The composition of the present invention provides a biocide-free latex with relatively low concentrations of a hydroperoxide.

Antioxidant blends comprising a phenolic antioxidant, a phosphite antioxidant, and a lactone-based antioxidant and for use in polymeric materials. The phenolic antioxidant may be configured to scavenge oxygen-centered free radicals in the polymeric materials. The phosphite antioxidant may be configured to scavenge unstable compounds, such as hydroperoxides, in the polymeric materials. The lactone-based antioxidant may be configured to scavenge carbon-centered free radicals in the polymeric materials. The antioxidant blends may be added to polymers to reduce the oxidation and degradation of the polymers to increase the service life of the polymers. Polymers comprising the antioxidant blends may have increased long-term durability and may be utilized at high temperatures and in humid conditions, such as pasteurization conditions.

The invention belongs to the technical field of polyvinyl butyral, and discloses efficient polyvinyl butyral and a preparation method thereof, a three-stage gradient acid water reuse pickling process is designed, a composite builder alkali washing and pre-neutralization step is matched, and the use amount of fresh water and the discharge amount of wastewater are greatly reduced through acid water graded storage and regular impurity removal, so that the production cost is reduced, and the production efficiency is improved. The water resource consumption and the wastewater treatment cost are reduced; meanwhile, residual polyvinyl alcohol and salt impurities in a filter cake are efficiently removed, and the influence of the impurities on the light transmission performance is avoided, so that the product can meet high-end scenes such as an automobile front windshield and a photovoltaic module which have strict requirements on the light transmission performance, and environment-friendly production and product quality are both considered; the composite antioxidant system is formed by compounding an antioxidant 1076, an antioxidant 168 and an ultraviolet absorbent UV-327 according to a specific proportion, the antioxidant 1076 captures thermo-oxidative aging free radicals, the antioxidant 168 decomposes hydroperoxide, and the ultraviolet absorbent UV-327 shields ultraviolet light.

This invention discloses a method for purifying resorcinol, comprising: O) mixing m-diisopropylbenzene dihydroperoxide with an acid catalyst, performing a cracking reaction, and neutralizing to obtain a reaction liquid oil phase; A) sending the reaction liquid oil phase to a crude acetone tower for acetone separation, and further refining the separated acetone to obtain acetone product; C) sending the acetone-free component obtained in step A) to a solvent removal tower to remove the solvent, obtaining a crude resorcinol stream; D) passing the crude resorcinol stream through a resorcinol resin bed to remove aromatic olefin impurities; E) removing the heavy components from the stream obtained in step D) to obtain crude resorcinol, which is then passed through a refining tower to obtain the resorcinol product; F) sending the heavy components separated in step E) to a dealkylation tower, where some of the heavy components decompose to generate resorcinol, which is then crystallized to obtain the resorcinol product. This method can reduce resorcinol loss, improve resorcinol purity, and reduce energy consumption in the resorcinol purification process.