56 results about "2-Ethylanthraquinone" patented technology

A carried Pd-alumina catalyst for preparing hydrogen peroxide by anthraquinone method is prepared from Pd as main active component and Al2O3 as carrier through impregnation. Said Al2O3 has been coated by RE oxide and calcined at 900-1000 deg.C. It has high hydrogenating efficiency of 8-9 gH2O2 / L for 2-ethyl anthraquinone / heavy arene plus trioctyl phosphate or 10-13 gH2O2 / L for (2-tert-butyl anthraquinone plus 2-ethyl anthraquinone) / (heavy arene plus tetrabutyl urea).

A photocurable coating for ceramics, its raw materials are proportioned as follows in parts by weight: 100 parts of polyurethane acrylate; 5-15 parts of hydroquinone; 10-20 parts of titanium dioxide; 1,4-cyclohexanedione mono- 1-10 parts of 2,2-dimethyltrimethylene ketal; 80-100 parts of water; 20-30 parts of 2-ethylanthraquinone; 1-5 parts of coloring pigment; 15-25 parts of N-vinylpyrrolidone 25-35 parts of trimethylolpropane triacrylate; 30-40 parts of isophthalic acid; 35-45 parts of crosslinking agent; 5-25 parts of maleic anhydride; 10-30 parts of epoxy acrylate; 20‑40 parts of adipic acid; 15‑35 parts of diethylene glycol; product gloss 120%‑130%, hardness 8‑10H; surface dry time 15‑30s, solid dry 15‑30min, alkali resistance 1‑2d, Acid resistance 24‑36h; water resistance 3‑7d, flexibility 1mm; adhesion level 1, can be widely produced and continuously replace existing materials.

The invention relates to a method for preparing tetrahydro-2-ethyl anthraquinone from a working solution for the production of hydrogen peroxide by anthraquinone process, comprising the following steps: taking a certain amount of the working solution for the production of hydrogen peroxide by anthraquinone process to conduct vacuum distillation, removing heavy aromatics and other substances of low boiling point to obtain a dried substances; carrying out oversaturated dissolving on the obtained dried substances with organic solvents, stirring, oscillating, conducting suction filtration, letting trioctyl phosphate and 2-ethyl anthraquinone, etc. in the solvent, drying insoluble substances to obtain dried substances; dissolving the dried substances with organic solvents, and conducting recrystallization to obtain high-purity tetrahydro-2-ethyl anthraquinone. The method of the invention not only solves the problems of time consuming and labor consuming property and low conversion rate when synthesizing tetrahydro-2-ethyl anthraquinone by autoclave reaction, but also reduces the cost, shortens the operation time. Tetrahydro-2-ethyl anthraquinone prepared by the method of the invention has a purity of more than 99.5%, and can be used as a tetrahydro-2-ethyl anthraquinone standard sample for analyzing the working solution for hydrogen peroxide.