7 results about "Lithium methoxide" patented technology

The present invention relates to a method of preparing a heterogeneous linear carbonate, the method including performing a transesterification reaction of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst, wherein the catalyst is one or more selected from the group consisting of lithium methoxide (LME), lithium ethoxide (LEE), sodium methoxide (SME), sodium hydroxide (NaOH), and a mixture thereof, and the catalyst is input in a state of being dissolved in a sulfoxide-based solvent.

Provided is a method for producing a heterogeneous linear carbonate, including a step of performing transesterification of dimethyl carbonate (DMC) and ethanol (EtOH) in the presence of a catalyst selected from one or more of lithium methoxide (LME), lithium ethoxide (LEE), sodium methoxide (SME), sodium hydroxide (NaOH), and a mixture thereof, the catalyst being introduced in a state of being dissolved in a sulfoxide-based solvent.

The invention provides a method and equipment for separating and removing trimethyl borate from methanol waste liquid, and relates to the technical field of methanol solvent recovery. The separation method comprises the following steps: (1) mixing the methanol waste liquid with a basic catalyst to form a mixed liquid; the basic catalyst is selected from at least one of sodium methoxide, lithium methoxide and sodium hydroxide; and (2) transferring the mixed solution into a methanol rectifying tower, continuously separating the mixed solution in the methanol rectifying tower, collecting methanol at the tower top, and enabling tower bottoms to flow out from the tower bottom. The number of theoretical plates of the methanol rectifying tower is 50-76, the reflux ratio of the tower top is (2-4): 1, the operating temperature of the tower top is 67-68 DEG C, and the operating temperature of a tower kettle is 70-80 DEG C. According to the method, the content of trimethyl borate in methanol is reduced to be below 10 ppm, the method is simple and high in feasibility, the treated methanol can be completely applied to an original reaction or any other application, the production cost is reduced, and the method is environmentally friendly.

The application discloses a synthetic method of a composite coating and application of the composite coating to a surface of an artificial bone, and belongs to the technical field of biomaterials.The synthetic steps of the composite coating are as follows: firstly, the artificial bone substrate is cleaned and subjected to oxygen plasma activation pretreatment; secondly, polyether ether ketone is dissolved in N-methyl pyrrolidone, mixed with tantalum-doped lithium zirconate nanowires and a dispersing agent, and subjected to ultrasonic treatment to form a coating slurry; the coating slurry is formed into a wet film on the substrate by dip-coating; and finally, the wet film is subjected to step-by-step heat treatment and solidification to obtain the composite coating.The preparation steps of the nanowires are as follows: zirconium ethoxide, tantalum ethoxide and lithium methoxide are used as precursors, and a precursor sol is obtained through a sol-gel reaction under the control of water quantity; the nanowires are grown through a hydrothermal reaction combined with a morphology directing agent; and finally, the nanowires are washed, dried and calcined to obtain the final product.The method has simple process, and the obtained coating has excellent biocompatibility, mechanical strength and potential bioactivity, is suitable for surface modification of an artificial bone implant, and can effectively promote bone integration.

The application discloses a preparation method of lithium saccharin, which comprises the following steps: 1, under the condition of a polar organic solvent, adding saccharin and an alkaline organic lithium reagent, controlling the temperature to form a homogeneous phase reaction system, and performing an acid-base neutralization reaction; the alkaline organic lithium reagent is selected from one of the following: methanolate, ethanolate, diisopropylaminolithium, hexamethyldisilazanide, n-butyllithium and methyllithium; 2, after the reaction is completed, cooling and crystallization or adding an inert solvent for recrystallization, and then washing and drying to obtain the lithium saccharin product. The method has the advantages of simple process route, convenient post-treatment, high yield and high product purity.

The invention discloses a purification method of lithium benzenetetracarboxylic acid, and relates to the technical field of lithium ion batteries. The method comprises the following steps: reacting pyromellitic acid with a methanol solution of lithium methoxide to obtain a crude product of benzenetetracarboxylic acid, and purifying the crude product of benzenetetracarboxylic acid, namely dissolving the crude product of benzenetetracarboxylic acid into a mixed solution of water and ethanol under a heating condition, slowly cooling the solution, separating out a solid, filtering, and carrying out vacuum drying on the obtained solid to obtain a lithium benzenetetracarboxylic acid crystal. The purity of the purified lithium benzenetetracarboxylic acid is high; the purified lithium benzenetetracarboxylic acid is used as a lithium battery additive, has more excellent performance than unpurified lithium benzenetetracarboxylic acid and a common lithium battery additive, and has a wide industrialization prospect.

The invention relates to the field of synthesis of chemical raw materials, in particular to a cyclohexanehexol metal salt and a synthesis method thereof. According to the method, inositol and lithium methoxide or sodium methoxide are used as raw materials and react in a methanol environment to obtain high-purity inositol hexa-lithium or inositol hexa-sodium, and the method is simple to operate, mild in reaction condition and suitable for industrial popularization; the method is carried out in a manner of excessive lithium methoxide or sodium methoxide, the excessive lithium methoxide or sodium methoxide and solvent methanol can be repeatedly recycled, no other by-products are generated, and the method is environment-friendly.