3results about How to "Avoid harsh conditions" patented technology

This invention discloses a method for the direct oxidative carbonylation of methane to prepare acetic acid. Specifically, this invention provides a catalytic method for the preparation of acetic acid from methane, comprising the following steps: under solvent conditions, in the presence of light, an iron catalyst, chloride ions, and an oxidant, methane and carbon monoxide undergo a methane oxidative carbonylation reaction to obtain acetic acid. This method utilizes readily available methane, carbon monoxide, and air (or oxygen), employs an iron catalyst, and achieves direct, efficient, and highly selective acetic acid production via a one-step photocatalytic reaction, demonstrating promising application prospects. The substrate scope of this invention is broad, applicable to a range of chain and cyclic alkanes.

The invention discloses a preparation method of 2-methyl-4-aminoquinoline, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: by taking 2-methylquinoline as a raw material, carrying out nitrogen oxidation reaction under the action of 3-chloroperoxybenzoic acid (mCPBA) without purification; then carrying out nitration reaction in iron nitrate nonahydrate and isopropanol; then, under the tetrahydroxy diboron / alkaline condition, 2-methyl-4-aminoquinoline is generated through reduction. Easily available 2-methylquinoline is adopted as a raw material, nitrogen oxidation is performed, a ferric nitrate nitration system is adopted, and finally amino is introduced through reduction, so that harsh conditions in a traditional method are avoided, the route is simple and efficient, product separation and purification are simple, and the method is suitable for being carried out under industrial amplification conditions.

This invention discloses a matte aluminum alloy sealing agent and its sealing process. The matte aluminum alloy sealing agent comprises the following raw materials by weight: 60-80 parts of polyethylene acrylic acid with a grafting rate of 18-22; 10-15 parts of diluent; 15-20 parts of filler; 1-2 parts of film-forming aid; and 120-145 parts of deionized water. The matte aluminum alloy sealing agent not only improves the corrosion resistance of the aluminum alloy, but also, to achieve a decorative appearance, gives the treated aluminum alloy surface a matte luster, resulting in a luxurious and textured surface.