55 results about "Magnesium perchlorate" patented technology

The invention discloses a novel preparation method of netaglinide oxazolone shown in the formula (IV), which comprises the following steps: under the action of a catalyst A, enabling 3-fluorine-4-morpholine phenyl isocyanate shown in the formula (I) to react with (R)-epoxy chloropropane to obtain a compound (II), wherein the catalyst A is magnesium diiodide, magnesium dibromide, magnesium dichloride, magnesium perchlorate or magnesium trifluoromethanesulfonic acid; enabling the compound (II) to react with sodium azide to obtain a compound (III); reducing the compound (III) by hydrogenation, and then, acetylating the reduced compound (III) to obtain the compound (IV). In the invention, the low-cost and environment-friendly catalyst (Lewis acid magnesium) is used for catalyzing the cycloaddition reaction of the (R)-epoxy compound and the isocyanate to establish a mother nucleus structure of the netaglinide oxazolone by one step, thus the prepared netaglinide oxazolone has high stereoselectivity, does not need rigorous operation conditions, such as low temperature, no water, no oxygen and the like, has the advantages of moderate reaction conditions, simple and convenient operation, high utilization ratio of atoms, environment protection, low production cost and the like, and is suitable for industrialized production.

[Problems] A coating composition preferably used for forming a hard coating by being applied and cured on a light-transmitting member such as a highly refractive plastic lens or a highly refractive photochromic plastic lens having a function for developing a color, the coating composition markedly improving weather resistance (preventing discoloration) while sustaining high refractive index, scratch resistance and excellent adhesion to the optical material.[Means for Solution] The coating composition comprises (A) a fine granular metal oxide containing titanium oxide and (B) a fine granular metal oxide containing titanium oxide having dissimilar properties as selected by a specific light irradiation test and, further, contains (C) an epoxy group-containing organosilicon compound such as γ-glycidoxypropyltrimethoxysilane, (D) water, (E) an organic solvent such as methyl alcohol, and (F) a curing catalyst such as aluminum acetyl acetonato or magnesium perchlorate at specific ratios.

Disclosed is a coating composition appropriately usable for forming a hard coat film that is obtained by applying the composition onto a light-permeable member, such as a plastic lens having a high refractive index or a photochromic plastic lens having a color-developing function and a high refractive index, and hardening. This coating composition exhibits an extremely improved weather resistance (prevention of discoloration) while sustaining a high refractive index, a good scratch resistance and an excellent adhesiveness to an optical base. Specifically disclosed is a coating composition, comprising: titanium oxide-containing metal oxide microparticles (A) together with titanium oxide-containing metal oxide microparticles (B), provided that the titanium oxide-containing metal oxide microparticles (A) and the titanium oxide-containing metal oxide microparticles (B) have been selected through a specific light irradiation test and show different properties; an epoxy group-containing organosilicon compound (C) such as ?-glycidoxypropyltrimethoxysilane; water (D); an organic solvent (E) such as methyl alcohol; and a hardening catalyst (F) such as aluminum acetylacetonate or magnesium perchlorate, each in a specific amount.

An improved electrolyte for a cell having an anode comprising magnesium or magnesium alloy. The cell's cathode may desirably include iron disulfide (FeS2) as cathode active material. The improved electrolyte comprises a magnesium salt, preferably magnesium perchlorate dissolved in an organic solvent which preferably includes acetonitrile or mixture of tetrahydrofuran and propylene carbonate. The electrolyte includes an additive to retard the buildup of deleterious passivation coating on the magnesium anode surface, thereby enhancing cell performance. Such additive may preferably include 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4), 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6), lithium hexafluorophosphate (LiPF6), or aluminum chloride (AlCl3).

The invention discloses a hollow glass drying agent and a preparation method thereof. The drying agent is prepared from the following raw materials: diatomite, straw powder, foam aluminum, magnesium perchlorate, polyacrylamide, aluminum sulfate, sodium hexametaphosphate, titanium dioxide, polyethylene, a surfactant and de-ionized water. The preparation method comprises the following steps: mixing and combusting the straw powder and the diatomite to obtain mixture ash; mixing and grinding the foam aluminum, the polyacrylamide, the titanium dioxide, the polyethylene and the de-ionized water to obtain a first mixture; adding the magnesium perchlorate, the aluminum sulfate, the sodium hexametaphosphate and the surfactant into a reaction kettle; heating to 120 DEG C to 180 DEG C and adding a first mixture; stirring and raising the temperature to 340 DEG C to 450 DEG C; adding the mixture into a double-screw extruder and extruding to obtain grains. The drying agent disclosed by the invention has the advantages of low cost, large specific surface area and large static water absorption amount, is not easily influenced by temperature and humidity and has a stable absorption capability. A preparation process is simple, and the components are more tightly fused and are not easy to disintegrate.

The invention discloses a high-adsorbability environment-friendly hollow glass drying agent. The high-adsorbability environment-friendly hollow glass drying agent is prepared from 80% to 90% of attapulgite powder, 2% to 6% of magnesium perchlorate, 0.2% to 0.3% of quaternary alkyl-ammonium-based surface active agent, 2% to 6% of sodium aluminate and 4% to 8% of cationic polyacrylamide. The invention discloses a preparation method of the high-adsorbability environment-friendly hollow glass drying agent at the same time. The drying agent is a hollow glass drying agent with high adsorbability and an environmental protection property, the adsorption performance is efficient and long, and the environmental protection property is good.

The invention discloses a PEO-based solid electrolyte, a preparation method thereof and application of the PEO-based solid electrolyte in a solid-state lithium-sulfur battery. The polyoxyethylene-based solid electrolyte is obtained by uniformly mixing and drying the following components in parts by mass: 40-50 parts of lithium salt, 0.5-3 parts of magnesium salt, 5-20 parts of filler, 1000-1500 parts of solvent and 100 parts of PEO. According to the PEO-based solid electrolyte, bis (trifluoromethylsulfonyl) imide magnesium or magnesium perchlorate is adopted as a functional additive, so that the performance of the PEO-based solid electrolyte can be remarkably improved. The PEO-based composite solid electrolyte containing the magnesium salt additive prepared by the invention is applied to an all-solid-state lithium-sulfur battery for the first time, and shows excellent electrochemical performance.

The invention discloses a preparation method of ethyl petrol thioglycolate, which uses magnesium perchlorate as catalyst, uses cyclohexane as water-carrying agent, reacts mercaptoacetic acid with over absolute ethyl alcohol, distills the reaction solution at normal pressure to obtain over alcohol and cyclohexane, washes via distilled water, extracts via ether to remove magnesium perchlorate, filters and dries, depressurizes and distills to obtain ethyl petrol thioglycolate. The invention has simple process, non pollution, low cost and high yield as 98%.