609 results about "Tert-Butyl hydroperoxide" patented technology

The invention discloses a preparation method of tert-butyl hydroperoxide and di-t-butyl peroxide which includes the following steps: after mixing vitriol, oxyful and phosphotungstic acid with certain concentration, adding tertiary butyl alcohol into a mixed liquor or adding the mixed liquor into the tertiary butyl alcohol; reacting for 0.5 to 5 hours under 20 to 60 DEG C; obtaining an oil phase after carrying out liquid separation on the crude product of the reaction; obtaining the tert-butyl hydroperoxide and di-t-butyl peroxide products by carrying out decompressing and rectifying on the oil phase; the method has the advantages of simple and convenient operation, low manufacture cost, safety, high efficiency and high yield; in addition, the method of the invention can adjust the relative content of the two reaction products by changing the reaction conditions. The reaction products of tert-butyl hydroperoxide and di-t-butyl peroxide are separated by decompressing and rectifying, thus avoiding the working procedures of acid cleaning and caustic wash in the traditional technique, solving the defect of overlarge waste water amount in the traditional technique, being beneficial to protecting the environment, reducing the manufacture cost and being capable of greatly increasing the enterprise benefits.

The invention discloses a preparation method of tert-butyl hydroperoxide. Under oxidation reaction conditions, tert-butyl alcohol, an oxidant, a solvent and a catalyst are subjected to mixed contact. The method is characterized in that the catalyst is a soluble zinc salt modified heteroatom molecular sieve.

The invention relates to a preparation method of single acyl or two acyl phosphine oxide and single acyl or two acyl sulfur phosphine compound, in particular to a preparation method of the 2,4,6-trimethylbenzene formacyl-diphenyl phosphine oxide of the photoinitiator. The addition reaction is carried out between Trimethyl benzaldehyde and diphenyl phosphorus chloride and then the mixture is oxidized by tert-butyl alcohol peroxide. The invention adopts the addition reaction of aldehyde and halogenated phosphorus and replaces the original process of acyl chloride and halogenated phosphorus, and has the advantages of greatly shortening the preparation procedures, low cost, easy operation and quick production. The compound prepared by the invention has more than 98 percent of the 2,4,6-trimethylbenzene formacyl-diphenyl phosphine oxide and can be served as the photoinitiator for solid for producing the solidification product with the performance of paint, varnish, porcelain glaze, paint, pigment or ink, and can better satisfy the increasing market demand.

The invention provides water-based ink resin for PVC furniture membranes and a preparation method of the water-based ink resin. Raw materials of the water-based ink resin for the PVC furniture membranes comprise an anionic emulsifier, a nonionic emulsifier, a pH buffering agent, an initiator, a chain transfer agent, a methyl methacrylate monomer, a methyl acrylate monomer, a glycidyl methacrylate monomer, tert-butyl hydroperoxide, rongalite, a preservative, and deionized water; based on a design concept of ''polymer welding'', an emulsion-type resin which is well compatible to PVC and of which glass transition temperature is similar to that of the PVC is prepared and designed, wherein the main body of the emulsion-type resin is poly(methyl methacrylate-methyl acrylate), and the high peeling strength of the water-based ink resin and the PVC furniture membranes is guaranteed; and meanwhile, a characteristic that the PVC furniture membranes have a large number of plasticizers is combined, a proper amount of the glycidyl methacrylate monomer with epoxy groups is introduced to a copolymerization monomer system, and therefore the plasticizer migration resistant ability of the water-based ink resin is improved.

The invention discloses an agricultural polyethylene resin composition. The composition mainly consists of linear low-density polyethylene LLDPE and organic peroxide, wherein the organic peroxide is combined by di-tert-butyl peroxide DTBP and tert-butyl hydroperoxide TBHP according to the combination ratio of between 1:1 and 6:1, and the consumption of the organic peroxide is between 500 and 2,500ppm (based on each gram of linear low-density polyethylene). In the composition, the linear low-density polyethylene LLDPE is cross-linked by compounding the peroxide, and when the obtained modified high-bath strength LLDPE resin is used for blowing a 80 mum agricultural green house membrane, and under the condition of ensuring the membrane blowing stability and the quality of the membrane, the consumption of the peroxide is lowered, so that the production cost is also lowered.

The invention relates to a method for preparing tert-butyl hydroperoxide. According to the invention, the raw materials are isobutane and di-tert-butyl peroxide, and steps of catalysis, underpressure distillation and crystallization are carried out on the raw materials according to a certain proportion under high temperature and high pressure. According to the invention, the raw materials are isobutane and the di-tert-butyl peroxide with mass ratio being 1:1-3; the high temperature and high pressure condition are 140-160 DEG C and 1.5-2.5 atmospheric pressure; a catalyst is ferric potassium oxalate; the underpressure distillation condition is 0.1-0.3 atmospheric pressure, and temperature is 30-40 DEG C; the crystallization step is characterized in that the collected liquid is dissolved by distilled water at temperature of 20-40 DEG C, then is cooled to the temperature of 1-5 DEG C, is slightly stirred, and is stood for crystallization. The process flow is short, reaction byproduct is less, environment pollution and corrosion degree on production equipment are low, and product purity is high.

The invention discloses a vinyl acetate wood adhesive and a preparation method thereof, and relates to the field of high polymer chemistry. The vinyl acetate wood adhesive is prepared by taking vinyl acetate and vinyl versatate as mixed monomers, diacetone-acryloamide and carbonic acid dihydrazide as cross-linking agent, copolymer emulsion of vinyl acetate and ethylene as seed emulsion, polyethylene biformaldehyde as a protecting adhesive, tert-butyl hydroperoxide and zinc formaldehyde sulfoxylate as initiators and sodium bicarbonate as a reducing agent by using a seed emulsion polymerization method. The vinyl acetate wood adhesive disclosed by the invention has the advantages of high adhesion strength, good water resistance, low glass transition temperature and good stability, can be used as an adhesive for splicing wood and processing artificial plates and can be also used in the fields of waterproofness and packaging.

The invention discloses a making technique of entikawei monohydrate as antiviral drug, which comprises the following steps: reacting cyclopentadiene monomer and sodium hydride protected by inert gas to make sodium cyclopentadiene; oxidizing through tert-butyl hydroperoxide; reacting with benzyl halogen under alkaline to obtain compound 3 to react with 6-benzyloxy guanine acted by alkaline to obtain compound 4; reacting with amino protective group to prepare compound 5; oxidizing through DMP tert-butanol oxidizing system to obtain ketone compound 6 to generate methylene compound 7 acted by Zn/TiCl4/CH2Br2; stripping protective product under acid condition to produce compound 8; recrystallizing to obtain the product.

Formaldehyde-free preimpregnation glue is provided. The glue is characterized by comprising following raw materials by weight: 0.713 parts of ammonium bicarbonate, 4.65 parts of ammonia water having aconcentration of 25%, 2.558 parts of ammonium persulfate, 0.775 part of tert-butyl hydroperoxide the concentration of which is 70%, 4.2 parts of an emulsifier CO436, 0.775 part of sodium hydroxymethanesulfinate the concentration of which is 95%, 0.9 part of a defoamer, 1.24 parts of a surfactant OT-75, 5.6 parts of acrylic acid, 12.5 parts of methyl acrylate, 200 parts of styrene and 340 parts ofbutyl acrylate. Beneficial effects of the glue are that 1) raw materials are formaldehyde-free, a production process is formaldehyde-free, and the glue is formaldehyde-free; 2) preimpregnated decorative paper and veneer prepared by utilizing the glue are formaldehyde-free; 3) decorative paper prepared by utilizing the glue is soft and can be rolled and cut; 4) decorative paper prepared by utilizing the glue, when compared with traditional melamine-urea-formaldehyde impregnated bond paper, is not sticky due to damp, and can be stably stored for 1 year or longer; and 5) the glue has stable properties and can be stored at room temperature for 1 year or longer.

The invention relates to a preparation method for a mixture containing tert-butyl hydroperoxide, which belongs to the technical field of organic peroxide preparation. The method includes the following steps that: (A) tert-butyl alcohol and sulfuric acid are added into a first reactor and stirred for reaction and the reaction temperature is controlled, so that tert-butyl hydrogen sulfate esterified solution is obtained; (B) hydrogen peroxide and recycled mother solution are added into a second reactor and stirred and the stirring temperature is controlled, so that mixed solution is obtained; (C) the tert-butyl hydrogen sulfate esterified solution and the mixed solution are added into a third reactor and stirred for reaction and the reaction temperature is controlled, so that reaction product is obtained; (D) the reaction product is led into a liquid-separating tank to separate liquid, so that upper oleic-phase mixture containing the tert-butyl hydroperoxide and lower aqueous-phase mother solution containing sulfuric acid and hydrogen peroxide are obtained, moreover, the lower aqueous-phase mother solution containing the sulfuric acid and the hydrogen peroxide returns to the step B and is mixed with the hydrogen peroxide, and the upper oleic phase is the mixture containing the tert-butyl hydroperoxide. The invention prevents the discharge of industrial sewage, so that the environment is protected, and energy and materials are saved, so that the preparation cost is reduced.

The invention provides a preparation method of beta-arone substituted sulfone compounds. In the method, olefin azide and sulfonyl hydrazide are used as start raw materials; and in an organic solvent, potassium iodide serves as a catalyst while tert-butyl hydroperoxide serves as an oxidizing agent, and the beta-arone substituted sulfone compounds are generated by reactions, wherein the reaction temperature is room temperature, and the reaction time is 2-4 hours. The preparation method provided by the invention has the advantages that the design is reasonable, the raw materials are easily available, no metal catalyst is involved, the reaction conditions are mild, high-temperature backflow is not required, the method is safe and convenient, the yield is high, and the yield of most products is over 70%. The preparation method provided by the invention is an easy-to-operate method for quickly establishing beta-arone substituted sulfone compounds in a mild and diversified manner, wherein the two start raw materials can be obtained by a one-step method, and the reaction raw materials are cheap and easily available. The general formula I of the beta-arone substituted sulfone compounds is shown in the specification.

The invention discloses a method for preparing benzaldehyde by using cyclodextrin polymer to catalyze the oxidation of cinnamic aldehyde or cinnamon oil. The method comprises the following steps: taking the cinnamic aldehyde or the cinnamon oil as raw materials, adopting the cyclodextrin polymer as a catalyst, taking one of hydrogen peroxide, sodium hypochlorite or tert-butyl hydroperoxide as an oxidizing agent, taking water as a solvent, controlling the reaction temperature to be 30-90 DEG C, after finishing the reaction, using an ester solvent, methyl alcohol, acetone or acetonitrile to conduct extraction, and obtaining the benzaldehyde by decompression and concentration. The method has the advantages of simple technique, mild reaction condition, low cost, high yield, high natural levelof the benzaldehyde, environment friendliness, easily-separable catalyst with reusability and the like.

The invention discloses a hydrolysis-resistant cable material for an automobile and a preparation method of the hydrolysis-resistant cable material. The hydrolysis-resistant cable material is prepared from the following raw materials, by weight part: 45-60 of ethylene propylene diene monomer rubber, 22-34 of tetrafluoroethylene-propylene rubber, 9-14 of rectorite powder, 5-10 of C5 hydrogenated petroleum resin, 2-3 of tert-butyl-hydroperoxide, 1.5-2.5 of basic lead carbonate, 3-5 of polyparadinitrosobenzene, 4-8 of dibutyl sebacate, 2-3 of magnesium oxide, 1-2 of zinc stearate, 3-6 of disproportionated rosin, 2.5-4.5 of N-ethyl-p-toluenesulfonamide, 12-17 of a composite flame retardant agent, 5-10 of spherical silicon powder, 1-2 of an accelerant PPD, 1-2 of an accelerant ZBPD, and 1-2 of an antioxidant 2246. The prepared cable material has excellent hydrolysis resistance, so that the electric wires and cables of the automobile can be effectively prevented against hydrolysis. The cable material can maintain excellent properties after continuously used in high pressure and high temperature, and has good electrical insulation property, mechanical strength, corrosion resistance, abrasive resistance, and thermal resistance.

The invention relates to an ethylene tetramerization catalyst composition which comprises diphosphorus ligand shown in formula I, a transition metal compound, an aluminum-containing promoter and tert-butyl hydroperoxide. The invention further provides an ethylene tetramerization method. The catalyst composition provided by the invention is applied to ethylene tetramerization, is high in reaction activity, is capable of producing 1-octylene with high selectivity, and the selectivity of 1-octylene is 74% or higher.