31 results about "Boroxine" patented technology

The invention relates to the field of chemistry and chemical engineering, and provides a cheap and efficient borosiloxane intermediate for the preparation of high-performance boron-containing polysiloxane. Under gas protection, drop the mixture of hydrocarbyl boronic acid and organic solvent A into dihydrocarbyl dichlorosilane, stir and react for 3h~8h at a temperature of -20°C~80°C, then add the mixture of organic solvent B and metal oxide , after reacting for 6h~18h, filter, wash with water, evaporate organic solvent A and organic solvent B to obtain mixed borosiloxane. The invention has the advantages of easy-to-obtain raw materials and low cost. The compound can be used to synthesize boron-containing polysiloxanes such as borosilicate rubber, heat-resistant adhesives and heat-resistant coatings, and can be widely used in aerospace, electronics, chemical industry, Machinery and other industries.

The invention relates to the field of electrochemistry, in particular to a lithium ion battery. The invention provides a lithium ion battery, comprising a positive pole piece, a negative pole piece, a separator and an electrolyte, the positive pole piece comprises a positive current collector and a positive active material layer, and the positive active material layer comprises a positive active material and Positive electrode additive, the positive electrode additive is selected from lithium phosphate compounds, the electrolyte includes electrolyte and solvent, the electrolyte also includes acid scavenger and film-forming additive, and the acid scavenger is selected from cyclic acid anhydride compounds , the film-forming additive is selected from boroxine compounds. The inventors of the present invention can stabilize the lithium salt by introducing positive electrode additives into the positive electrode sheet, and further introduce acid scavenger and film-forming additives into the electrolyte of the battery, thereby avoiding the decomposition of lithium salts to generate HF and accelerating the dissolution of positive manganese , and can remove HF in the electrolyte, effectively improving the cycle performance and / or storage performance of the battery.

A process for production of a borohydride compound M(BH4)y. The process has three steps. The first step combines a compound of formula (R1O)yM with aluminum, hydrogen and a metallic catalyst containing at least one metal selected from the group consisting of titanium, zirconium, hafnium, niobium, vanadium, tantalum and iron to produce a compound of formula M(AlH3OR1)y, wherein R1 is phenyl or phenyl substituted by at least one alkyl or alkoxy group; M is an alkali metal, Be or Mg; and y is one or two; wherein the catalyst is present at a level of at least 200 ppm based on weight of aluminum. The second step combines the compound of formula M(AlH3OR1)y with a borate, boroxine or borazine compound to produce M(BH4)y and a byproduct mixture containing alkali metal and aluminum aryloxides. The third step separates M(BH4)y from the byproduct mixture.

The present invention generally relates to compositions for lubricating oils. In certain aspects, the present invention generally relates to boroxane compounds having alkyl groups, wherein one or more of the alkyl groups contains at least 8 carbon atoms. Such compounds may exhibit increased hydrolytic stability compared to other boroxane compounds. Such boroxane compounds can be used, for example, to improve seal compatibility in engines. Other aspects of the invention generally relate to systems and methods for making such boroxane compounds, engine oils containing such boroxine compounds, methods of using such boroxine compounds, and the like.

A process for preparing halogenated azaindole compounds makes use of stable reagents including a brominating reagent, a boroxine and a sulfonic anhydride to enhance the selectivity and yield of the final product. In addition, the process is associated with various other advantages, including the ability to recycle reagents, cost reduction, and improved manufacturability.

The present invention relates to a method for preparing a four-coordinated organic boron compound, and more specifically, to a method for preparing various and widespread four-coordinated organic boron compounds by directly using an aryl, heteroaryl, or vinyl-functional boronic acid, boroxine, or borate compound as a starting material and adding the compound to any bidentate N,O-ligand, O,O-ligand, or N,N-ligand.

The invention discloses a lithium-ion battery electrolyte solution with low impedance and long cycle life and a preparation method thereof. A boroxine compound (that is, additive X) is added to the electrolyte solution, which can reduce the impedance of the battery and improve the Its power performance, the boron atoms in it can be used as anion acceptors to capture hydrofluoric acid, absorb hydrofluoric acid produced by lithium salts and other additives, prevent hydrofluoric acid from attacking the positive CEI film, and improve the cycle performance of the battery. The capacity retention rate is improved, the degree of dissociation of lithium salts and the migration number of lithium ions are increased, and the preparation is simple and easy.

The invention discloses a boroxane-based self-healing polyurethane and a preparation method thereof, belonging to the technical field of material science. Firstly, the polyurethane prepolymer with terminal isocyanate group was prepared, and then reacted with Boroxine with different terminal groups under different conditions to prepare self-healing polyurethane based on boroxane. Boroxine, which has a tripod structure and dynamic reversible properties, is introduced into the polyurethane chain as a crosslinking agent to increase the crosslinking density of polyurethane and obtain self-healing polyurethane with better mechanical properties. Combining the advantages of the designability of polyurethane and the controllability of soft and hard segments, the preparation route of the present invention is simple, which reduces the complexity of system design and processing, and is expected to solve the problem of high mechanical strength and good repair performance of polyurethane materials. The contradiction between provides an effective way.

The invention provides a boron-doped carbon material, namely a boron-doped carbon nonmetallic oxygen reduction catalyst and a preparation method thereof, and belongs to the scientific and technical field of fuel batteries. The preparation method includes the following steps that firstly, polymer (PTPB) of triphenyl boroxine (TPB) is synthesized by the adoption of Friedel-Crafts reaction; secondly, the PTPB is subjected to thermal treatment, and the boron-doped carbon nonmetallic oxygen reduction catalyst is obtained. The nonmetallic oxygen reduction catalyst is low in cost, simple in preparation technology and high in activity and stability.