199 results about "Cyclic acid" patented technology

A light-sensitive lithographic printing plate comprising a hydrophilic substrate provided thereon with a layer sensitive to infrared light rays comprising (A) a polymer represented by the following general formula (I); (B) an organic acid and/or a cyclic acid anhydride; and (C) a light-heat conversion substance. The light-sensitive lithographic printing plate is excellent in the both printing durability and the developing latitude.

A composition which comprises (i) tranexamic acid or a salt thereof, (ii) L-cysteine, a derivative thereof or a salt thereof and, as occasion demands, (iii) L-ascorbic acid, a derivative thereof or a salt thereof.

A non-aqueous electrolyte includes (i) an inhibitor against a reaction between an anode and a linear ester; (ii) a mixed organic solvent containing cyclic carbonate and the linear ester; and (iii) an electrolyte salt, wherein the inhibitor is any one compound or a mixture of at least two compounds selected from the group consisting of cyclic carbonate with a vinyl group, fluorinated ethylene carbonate, vinylene carbonate, cyclic acid anhydride, a compound having a cyclic S═O group and an acrylate-based compound. Also, an electrochemical device includes a cathode, an anode and the above non-aqueous electrolyte.

The present invention provides a conductive adhesive that is applicable as means for forming conductive junction to process for surface mounting of electronic parts for vehicle loading and process for the manufacture of the electronic parts per se for the purpose of substituting soldering therewith. The conductive adhesive according to the present invention is a conductive adhesive produced by dispersing a conductive medium, such as silver powder, in a binder resin component of a one-component epoxy thermosetting resin which has such a composition that the resin comprises, as essential components, an epoxy resin component composed mainly of an epoxy compound with a polycyclic aromatic ring skeleton, and a cyclic acid anhydride as a curing agent component thereof, and is further added with a coupling agent as an adherence imparting agent therefor.

A photosensitive paste composition for forming a black layer on top of plasma display panel (PDP) barrier ribs includes black pigment nanoparticles for contrast enhancement and a cyclic acid anhydride for fundamentally preventing the gelation of the paste composition. The photosensitive paste composition prevents electrical or optical crosstalk between adjacent discharge cells to achieve better contrast. The fundamental prevention of the gelation of the paste composition permits the paste composition to have good storage stability.

The invention provides a method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air, which belongs to the technical field of resource utilization of coal-containing pyrite. The method comprises the following steps: delivering pretreated coal-derived pyrite and oxygen-rich air into a fluidized bed roaster for calcination, carrying out cooling and dust collecting on high temperature furnace gas through a water pipe, a waste heat boiler and the like, carrying out cooling and demisting on furnace gasby using a one-stage dynawave scrubber--a packed scrubbing column--a two-stage electric mist collector, supplementing a proper amount of common air before furnace gas enters into a drying column, controlling the volume ratio of oxygen to sulfur dioxide in gas in a converter to be greater than 0.8, carrying out reforming and absorption two times after gas enters into a reforming and absorption system, discharging tail gas when the tail gas reaches the standard, and recovering heat energy of furnace gas, slag and dust, furnace gas treated by an electric dust collector, reforming gas of a reforming system and cyclic acid of an absorption system for by-production of middle and low pressure steam. According to the invention, high-level and middle-level heat energy produced in the process of production of sulfuric acid is fully utilized, and the resource of dilute sulfuric acid is recycled; therefore, the advantages of small production investment, low production cost, a high recovery rate of waste heat, clean production and no pollution in production of sulfuric acid are realized.

The invention pertains to the technical field of organic chemistry, in particular to a synthesis method of (4S, 5R)-semi-ester. The method carries out the enantioselective open-loop of cyclic acid anhydride and alcohol under the catalysis of cinchona alkaloid so as to prepare the (4S, 5R)-semi-ester. The reaction is carried out in the organic solvent in the states of normal pressure, compression or decompression, the reaction temperature is -80 DEG C to 25 DEG C, the reaction time is 10 to 80 hours, the total yield is more than 90 percent, and the ee is more than 98.5 percent. The raw materials of the method of the invention are easy to obtain, the catalyst can be reclaimed quantitatively, the reaction conditions are mild, and the yield and the stereoselectivity are high, so the invention is applicable to industrialization production.

The present invention provides a thermoplastic acrylic resin of a copolymer comprising 10 to 70% by weight of a repeating unit derived from the particular methacrylate monomer, 5 to 40% by weight of a repeating unit derived from the particular vinyl aromatic monomer, and 20 to 50% by weight of a repeating unit of the particular cyclic acid anhydride, characterized in that a molar ratio (B/A) is within the range of more than 1 to not more than 10, wherein (A) is a content of the repeating unit of the vinyl aromatic monomer and (B) is a content of the repeating unit of the cyclic acid anhydride, and the total amount of remaining monomers to 100 parts by weight of the copolymer is not more than 0.5 part by weight.

The invention discloses electrolyte of a lithium ion battery taking lithium titanate as cathode. The electrolyte comprises the organic solvent, lithium salt and additive dissolved in the organic solvent; the additive comprises one or the combination of the adiponitrile, butanedinitrile, 1,3-propane sultone, wherein the additive further comprises one or the combination of the cyclic acid anhydride and/or the derivate thereof, the total weight of the additive is 1-10% of the weight of the electrolyte, the weight of the cyclic acid anhydride and/or the derivate thereof, is 0.01-1% of the weight of the electrolyte. The additive comprises the cyclic acid anhydride and/or the derivate which have chemical reaction with the water in the battery, the combination water in the lithium titanate material, the water, the hydroxy and other groups for generating one component of the electrolyte, the defect that the water cannot be removed totally in the conventional vacuum baking process is compensated. The catalytic reaction for the hydroxy can be effectively avoided while having reaction with the Ti-OH bond on the surface of the lithium titanate particle, and the high temperature storage performance and the high temperature circulation performance of the lithium titanate battery are improved.

An object of the present invention is to provide a high-capacity, long-life lithium secondary cell suppressing a reduction in capacity particularly with respect to use under a high-temperature environment, and having improved cycle properties. The lithium secondary cell comprises a positive electrode active material layer containing a positive electrode active material, a negative electrode active material layer containing a silicon-based material as a negative electrode active material, and an electrolytic solution in which the positive electrode active material layer and the negative electrode active material layer are immersed, the electrolytic solution contains one or more of specific cyclic acid anhydrides.

The invention in the end effectively reduces the impurities in tranexamic acid injection preparation through controlling the conductivity of the injection water to control the quality of the tranexamic acid injection preparation, and limits and controls the sort and the quantity of the impurities according to quality standard, thus obviously improving the stability of the preparation and the quality of the tranexamic acid injection preparation.

The invention discloses a method for producing cellulose protic ionic liquid by using cellulose. Based on existence of organic base, cellulose and CO2 are reacted in order to realize reversible derivatization dissolving, and organic base is used as an effective component for dissolving cellulose and is used as an organic functional catalyst subsequently, in order to catalyze a reaction between cellulose and cyclic acid anhydrides; one step method by using cellulose is used for preparing the cellulose protic ionic liquid; the dissolving processing system has the advantages of cheap price, easypreparation, and easy recycling, and the system has catalysis performance and other characteristics; the method provides good applications to dissolving processing and graft modification of cellulose.

The present invention provides a thermoplastic acrylic resin comprising (i) a repeating unit derived from a methacrylate monomer, (ii) a repeating unit derived from a vinyl aromatic monomer, (iii) a repeating unit derived from an aromatic group-containing methacrylate monomer, and (iv) a cyclic acid anhydride repeating unit, and a molding for optical material comprising the same.

A carnuba silicone wax which does not contain free silicone oil. This wax is obtained by reacting a silicone compound having a substituent with reactivity to the hydroxyl group in natural carnuba wax, with this hydroxyl group. A carboxyl group may be introduced into the molecule by reacting this hydroxyl group with a cyclic acid anhydride, and a silicone compound having a group which can react directly with this carboxyl group is made to react. Alternatively, a hydrogen silicone may be hydrosilylated by a double bond introduced by reacting an epoxy compound having a double bond with this carboxyl group.

The invention provides a comprehensive utilization method for cyclic acid leaching of high-magnesium phosphorus tailings. The method comprises the steps that firstly, silicon slags in the high-magnesium phosphorus tailings are separated out through hydrochloric acid hydrolysis; secondly, phosphorus in the high-magnesium phosphorus tailings is precipitated in a form of calcium chlorophosphate through low-temperature standing; thirdly, calcium and magnesium in the high-magnesium phosphorus tailings are separated out through sulfuric acid acidification, and calcium sulfate whiskers are obtained through concentration treatment; finally, magnesium hydroxide is obtained by introducing ammonia gas, and hydrochloric acid is added to a final concentrate to conduct cyclic acid leaching on the high-magnesium phosphorus tailings. On one hand, the added value of the obtained product can be increased; on the other end, the great increase of the resource utilization rate of the high-magnesium phosphorus tailings is facilitated; thus, the method is beneficial to solving the accumulation problem of the phosphorus tailings and the environmental pollution caused by the phosphorus tailings, improves the ecological environment and has great economic, social and environmental benefits.