45 results about "P-Dihydroxybenzene" patented technology

The invention provides a preparation method and an application of a co-immobilized enzyme electrode which is used for detecting p-dihydroxybenzene and o-dihydroxybenzene. The preparation method comprises steps of: immobilizing tyrosinase and peroxidase on oxidized grephene to obtain a co-immobilized enzyme liquid and smearing dropwisely the co-immobilized enzyme liquid and a chitosan solution successively on a surface of a glassy carbon electrode to obtain the co-immobilized enzyme electrode which is used for detecting p-dihydroxybenzene and o-dihydroxybenzene. The electrode is low in cost, is easy and convenient to operate, is quick and sensitive, is low in detection limit, is good in selectivity and can be used for detecting microscale p-dihydroxybenzene and o-dihydroxybenzene in environment.

The invention relates to a synthesis method of a hydroxy aurone compound, and particularly relates to a preparation method of a 4-hydroxy aurone compound. The preparation method is as below: reacting raw materials comprising 2',6'-dihydroxy acetophenone and a benzaldehyde derivative; first protecting 2',6'-dihydroxy acetophenone with one hydroxy; then conducting condensation and cyclization on the 2',6'-dihydroxy acetophenoneand benzaldehyde derivative; and conducting deprotection to obtain the 4-hydroxy aurone compound. The 4-hydroxy aurone compound has a structural formula as below; and R represents any substituent group. Compared with the existing method, the preparation method provided by the invention has advantages of low price of raw materials, high yield, short reaction time, simple and mild reaction conditions, and simple operation, etc.

The invention discloses a method for preparing phenol and dihydroxybenzene by catalytic hydroxylation of benzene. The method comprises that benzene undergoes a one-step hydroxylation reaction in the presence of acetonitrile as a solvent, H2O2 as a hydroxylation reagent and pigment green B as a catalyst to be converted into phenol, o-dihydroxybenzene and p-dihydroxybenzene, wherein a mass ratio of H2O2 to benzene is (3 to 8): 1; a mass ratio of acetonitrile to benzene is (15 to 30): 1; a mass ratio of the catalyst to benzene is (0.05 to 0.1): 1; catalytic hydroxylation time is in a range of 4 to 7 hours; and a catalytic hydroxylation temperature is in a range of 40 to 70 DEG C. The method adopts the pigment green B as a catalyst and provides a novel catalysis system for synthesizing phenol, o-dihydroxybenzene and p-dihydroxybenzene by pigment green B catalysis of benzene. The method overcomes the defects that the traditional technology has a lot of reaction steps, produces serious pollution and has a low atom utilization rate. Catalytic hydroxylation is carried out under mild conditions so that discharge of three wastes is reduced; the catalyst can be separated out easily; and a phenol yield is high. Therefore, the method is an environmentally-friendly green synthesis technology of phenols.

The invention relates to a modified montmorillonite catalyst, a preparation method and an application thereof. The preparation method of the modified montmorillonite catalyst comprises the following steps: selecting montmorillonite with average particle size of 1-50mum and roasting for 2-8 hours at 200-600 DEG C; adding an inorganic acid solution with mass concentration of 5-40% in the roasted and activated montmorillonite, wherein the solid-liquid mass ratio of montmorillonite to the acid solution is 1: 5-30, reacting for 2-8 hours under temperature of 60-110 DEG C to obtain a montmorillonite slurry; filtering the montmorillonite slurry, washing by deionized water under 30-60 DEG C, and then drying the washed and filtered montmorillonite at 60-120 DEG C. The catalyst has the advantages of simple preparation technology, wide raw material source, good stability and high yield. The catalyst is used for performing an alkylation synthesis to obtain a compound by taking p-dihydroxybenzene, organic acidity and benzene as raw materials, and the alkylation catalysis performance is good.

The invention discloses a method for preparing a soft magnetic manganese-zinc-iron composite material by using manganese-containing waste liquor and zinc sludge produced during production of p-dihydroxybenzene. The method comprises the following steps: adding the zinc sludge into the manganese-containing waste liquor, leaching under stirring, filtering, adding a flocculating agent into filtrate to remove silicon and aluminum impurities, adding ammonium bicarbonate into purified liquid containing manganese and zinc for co-precipitating, and washing to obtain co-precipitated powder; calcining the co-precipitated powder for decomposing, and washing by using organic acid to obtain a manganese-zinc composite material; and adding iron sesquioxide or a mixture of iron sesquioxide and at least one of manganous-manganic oxide and zinc oxide into the manganese-zinc composite material, and pre-burning to obtain the soft magnetic manganese-zinc-iron composite material. By taking the manganese-containing waste liquor and the zinc sludge produced during production of p-dihydroxybenzene as raw materials, the problem of environmental pollution is solved, high-value utilization of waste is fully realized, and a manufactured magnetic device is free from crystal spots, is non-crispy, and has high shearing resistance as well as fully-qualified physicochemical indexes and electromagnetic performance.

The invention provides an application of p-dihydroxybenzene farnesyl compounds and pharmaceutical salt of p-dihydroxybenzene farnesyl compounds as an alpha-glucosidase, protein-tyrosine-phosphatase IB or HMG-CoA reductase inhibitor, or in preparation of a drug for treating and / or preventing type II diabetes or hyperlipidemia, preparation of a drug or functional healthcare product for reducing blood glucose and blood lipids, preparation of a drug or functional healthcare product for treating or preventing the non-alcoholic fatty liver disease, preparation of a drug or functional healthcare product with the liver protection function and preparation of a drug or functional healthcare product for preventing and / or treating cancer or inhibiting tumor cell proliferation, or as RXR alpha (retinoid X receptor alpha) receptor binding inhibitor, or in preparation of a drug as the RXR alpha receptor binding inhibitor. The inhibitor, drug, food or healthcare product prepared from the p-dihydroxybenzene farnesyl compounds and pharmaceutical salt of the p-dihydroxybenzene farnesyl compounds have no toxic or side effects and have a remarkable treatment effect.

The invention discloses a method for preparing carrier resin for high-temperature-resistant molding process coloring materials. The method includes steps of 1, uniformly mixing and stirring, by weight, 70-100 parts of dihydric alcohol, 60-100 parts of polyacid and 15-25 parts of diacid anhydride with one another to obtain first mixtures in nitrogen atmosphere, gradually heating the first mixturesuntil the temperatures of the first mixtures reach 195-235 DEG C, carrying out condensation reaction, preserving heat after reaction systems become uniform and transparent, and continuing to carry outreaction; 2, cooling products obtained at the step 1 until the temperatures of the products reach 175-185 DEG C, adding 7-8 parts of p-dihydroxybenzene into the products, uniformly stirring the p-dihydroxybenzene and the products to obtain second mixtures, then cooling the second mixtures until the temperatures of the second mixtures are lower than 45 DEG C, and filtering the second mixtures to obtain the carrier resin. The method for preparing the carrier resin for the high-temperature-resistant molding process coloring materials has the advantages that the dihydric alcohol, the polyacid anddiacid are mixed with one another to obtain the first mixtures in the nitrogen atmosphere, the first mixtures are heated until the temperatures of the first mixtures reach 195-235 DEG C, the condensation reaction is carried out, the heating rates can be accurately controlled, accordingly, products only contain few small molecules and are in excellent liquid states, and the high-temperature resistance of the products can be improved.

The invention provides a preparation method and an application of a co-immobilized enzyme electrode which is used for detecting p-dihydroxybenzene and o-dihydroxybenzene. The preparation method comprises steps of: immobilizing tyrosinase and peroxidase on oxidized grephene to obtain a co-immobilized enzyme liquid and smearing dropwisely the co-immobilized enzyme liquid and a chitosan solution successively on a surface of a glassy carbon electrode to obtain the co-immobilized enzyme electrode which is used for detecting p-dihydroxybenzene and o-dihydroxybenzene. The electrode is low in cost, is easy and convenient to operate, is quick and sensitive, is low in detection limit, is good in selectivity and can be used for detecting microscale p-dihydroxybenzene and o-dihydroxybenzene in environment.

The invention provides a medicinal adhesive and a preparation method thereof. The medicinal adhesive comprises polyacrylate, tragacanth, polymethacrylate, squalane, benzoyl peroxide, rosin triglyceride, dimethyl sebacate, p-dihydroxybenzene, p-benzene methane sulfonic acid, dioctyl phthalate, tricalcium phosphate and sodium alginate. The preparation method of the medicinal adhesive comprises the following steps: firstly mixing polyacrylate, tragacanth, polymethacrylate and squalane, then adding benzoyl peroxide and rosin triglyceride, and stirring to obtain a mixture I; then mixing dimethyl sebacate, p-dihydroxybenzene, p-benzene methane sulfonic acid, dioctyl phthalate, tricalcium phosphate and sodium alginate to obtain a mixture II, and then mixing the mixture I and the mixture II, heating, insulating, and cooling to room temperature, so that the medicinal adhesive is obtained. The medicinal adhesive has the advantages of moderate curing speed, long stabilization time and strong bonding strength.

The invention discloses a photocuring powder coating and belongs to the field of coatings, in particular to the field of photocuring powder coatings. The photocuring powder coating comprises a film forming substance, a photocatalyst, filler and an auxiliary, wherein the film forming substance comprises matrix resin and curing resin, the matrix resin is prepared through chemical reaction synthesis of raw materials of p-phthalic anhydride, pentanediol, diethylene glycol, maleic anhydride, o-dimethoxybenzene, p-dihydroxybenzene and paraphthaloyl chloride, the matrix resin and the curing resin are mixed to form the film forming substance, the photocatalyst, the filler and the auxiliary are added to the film forming substance, and the photocuring powder coating is obtained. The photocuring powder coating can be cured under ultraviolet light and is convenient to prepare and environment-friendly.

The invention discloses an insulating anti-aging coating for a unit ring network cabinet and a preparation method thereof. The method comprises: 1) mixing polyether glycol, diisocyanate, expanded vermiculite, zinc borate, 4-amino- 1,2,4-triazole, silica sol, ethyl acetate and tungsten disulfide are subjected to a contact reaction under vacuum conditions to obtain component one; 2) ethylene-vinyl acetate emulsion, polyether triol , inorganic salt whisker, lead naphthenate, hydroquinone, diatomaceous earth, aluminum oxide fiber and alkylsulfonic acid alcohol ether carry out contact reaction under the existence of ultraviolet light to make component two; 3) will Component 1 is mixed with Component 2, followed by adding bone glue, urea, asphalt and silicon dioxide for ultrasonic vibration to prepare an insulating anti-aging coating. The insulating anti-aging coating prepared by the method has excellent insulating properties and anti-aging properties, thereby making the insulating anti-aging coating suitable for unitary ring network cabinets. At the same time, the preparation method has simple procedures, easy-to-obtain raw materials, and is convenient for mass production.