817 results about "Acid content" patented technology

A photo acid generator (PAG) or an acid is used to reduce resist scumming and footing. Diffusion of acid from photoresist into neighbors causes a decreased acid level, and thus causes resist scumming. An increased acid layer beneath the resist prevents acid diffusion. In one embodiment, the increased acid layer is a layer of spun-on acid or PAG dissolved in aqueous solution. In another embodiment, the increased acid layer is a hard mask material with a PAG or an acid mixed into the material. The high acid content inhibits the diffusion of acid from the photoresist into neighboring layers, and thus substantially reduces photoresist scumming and footing.

The invention discloses an acid circulation method during the formation of a lead acid storage battery. The battery formation process introduces battery assemblage mode and adopts a special battery connector to assemble the acid circulation system; the electrolyte used in the formation process is low in density. The acid circulation method solves the problems of acid content deficiency and temperature reduction of the electrolyte during the battery formation process through the external circulation of the electrolyte; meanwhile, the acid circulation method can expel the sediments inside the battery to the outside through the circulation of the electrolyte, thus playing cleaning function. Heat generated inside the battery during the formation process is expelled through the circulation of the electrolyte, thus cooling the battery. The density of the electrolyte can be adjusted automatically so as to maintain a constant density during the battery formation process. The liquid level of the electrolyte of the battery can be adjusted automatically so as to satisfy the requirements at the time of delivery from the factory. The time period of the battery formation process can be reduced to 1-3days.

The invention discloses a strain producing long chain dibasic acid, which is candida tropicalis CAT N145 with a collection number of CCTCC M 2011192. The invention also discloses an application of the strain and a method for producing dibasic acid by using the strain. The candida tropicalis CAT N145 provided by the invention has high conversion capacities upon n-alkanes, fatty acids, and fatty acid derivatives with different carbon chain lengths, and mixtures thereof. Miscellaneous acid content of the produced dibasic acid is low. The application range of the candida tropicalis CAT N145 is wide. With the strain and the application, the controlling over a fermentation process can be greatly simplified, and extraction and purification are easy. The strain has good market application prospect.

The present invention relates to a hydrotreating catalyst composed of a carrier having a Brønsted acid content of at least 50 mumol/g such as a silica-alumina carrier or a silica-alumina-third component carrier, in which the silica is dispersed to high degree and a Brønsted acid content is at least 50 mumol/g, and at least one active component (A) selected from the elements of Group 8 of the Periodic Table and at least one active component (B) selected from the elements of Group 6 of the Periodic Table, supported on said carrier. The present invention also relates to a method for hydrotreating hydrocarbon oils using the same. The hydrotreating catalyst of the present invention provides excellent tolerance to the inhibiting effect of hydrogen sulfide, high desulfurization activity, and exhibits notable effects for deep desulfurization of hydrocarbon oils containing high contents of sulfur, in particular gas oil fractions containing difficult-to-remove sulfur compounds. The hydrotreating catalyst of the present invention is also very effective for hydrodenitrogenation, hydrocracking, hydrodearomatization, hydroisomerization, hydrofining and the like of hydrocarbon oils.

The invention relates to a preparation method of a long carbon chain dibasic acid. C11 and upper alkane is used as a substrate to produce a corresponding long carbon chain dibasic acid product through the conversion of the substrate into the long carbon chain dibasic acid by using a microbial fermentation method as well as the extraction and the separation of fermentation liquid and the refining processes of a crude product of dibasic acid. Through technological innovation and process innovation, the invention researches a new preparation method of the long carbon chain dibasic acid, greatly decreases the production cost of the long carbon chain dibasic acid, improves the yield and the product quality of the long carbon chain dibasic acid, can produce C11 and upper long carbon chain dibasic acid, finally solve the bottleneck problem restricting the rapid development of the long carbon chain dibasic acid, and form the industrialized scale and the technological predominance. The long carbon chain dibasic acid produced by using the bioanalysis provided by the invention has the advantages of high acid generation level, low production cost, good product quality, complete variety, and the like, the prepared long carbon chain dibasic acid product has high single acid content, good light transmission and high thermal stability, can meet the requirements of different clients, and can be used for producing high-grade spices, high-performance engineering plastics, high-temperature dielectric medium, high-grade hot-melt adhesive, coldness-resistant plasticizer, high-grade lubricating oil, high-grade paint, coating, and the like. The invention greatly widens the development space of the downstream products of the long carbon chain dibasic acid.

The invention discloses a silicon trap for coker naphtha and application thereof. In the silicon trap for the coker naphtha, alumina is taken as a carrier, silica is taken as an aid, W, Mo and Ni are taken as hydrogenation components, the pore volume of the silicon trap for the coker naphtha is 0.5-0.70ml/g, the specific surface area is 250-500m<2>/g, the hydrogenation components are 1 to 20 percent based on oxides, and the acid content is 0.3-0.5mmol/g. The silicon trap for the coker naphtha can effectively remove the silicon impurity contained in the coker naphtha, and protects a coker naphtha hydrofining catalyst against permanent deactivation caused by silicon poisoning.

A process is provided to produce non-aqueous electrolytic solution for use in batteries having low acid content and low water content. The invention involves removing acids and water from non-aqueous electrolytic solutions typically found in lithium or lithium-ion batteries by using nitrogen-containing compounds such as triazines. After treatment by a triazine such as melamine, the concentrations of acids and water in the electrolytic solutions are substantially decreased. The present invention provides a process to prepare extremely pure electrolytic solutions having low (<20 ppm) concentrations of both water and acids.

The invention provides an acid-resistant bifidobacterium breve BB8dpH and an application thereof. The nucleotide sequence of the 16SrRNA gene part of the bifidobacterium breve BB8dpH is shown in SEQ ID NO.1, and is stored with the preservation number of CGMCCNo.8370. The bifidobacterium breve BB8dpH is a strain obtained by separating from the dejecta of healthy young people and further screening under the pH 3.2 acid condition. According to the fermentation and culturing process, anaerobic culture at 37 DEG C is carried out in a BL liquid substrate (containing 0.05% cysteine hydrochloride) for 24 hours. The bifidobacterium breve BB8dpH has remarkably better acid resistance than the common strains, and the acid resistance has genetic stability; the bifidobacterium breve BB8dpH has different percent contents of cell membrane fatty acids from the common strains, the average carbon chain length of the bifidobacterium breve BB8dpH is remarkably longer than that of the common strains, and the cell membrane fluidity of the bifidobacterium breve BB8dpH is remarkably lower than that of the common strains; and the bifidobacterium breve BB8dpH is used in the production field of daily fermented food, health-care food and medicines.

This invention relates to the plus plate lead paste of lead-acid battery comprising (by weight percentages based on lead powder): lead powder 100%, 1.4g/cm3 sulfuric acid 8-12%, deionized water 9-11%, lead dioxide 3-4.2%, short fiber 0.05-0.06%, carbon fiber 0.10-0.15%, anisotropic graphite 0.2-0.4% and bismuth oxide 0.05-0.11%. In this invention, on the based on certain water and acid content in the active substance, additional positive pole active substances are added such as anisotropic graphite and bismuth oxide or the like. The changed components improve the primary battery volume and the ratio of weight/energy with prolonging battery service life.

The invention relates to a filter additive material for selectively reducing the hydrocyanic acid emission amount in the mainstream smoke of cigarettes and a preparation method thereof. The filter additive material for selectively reducing the hydrocyanic acid emission amount in the mainstream smoke of cigarettes is characterized in that the filter additive material is a novel material that can effectively absorb acidic gas and is obtained by chemically modifying a porous material and introducing different alkali groups. The preparation method of the filter additive material comprises the following steps: respectively carrying out surface chemical modification on the selected porous carrier material with trimethylamine chloride acethydrazide or (2-bromomethyl)trimethyl ammonium bromide, soaking with sodium hydroxide solution, washing with water and drying to obtain the modified porous material containing ammonium hydroxide group. Adding the material in a cigarette filter rod can reducethe hydrocyanic acid content in the mainstream smoke of cigarette by more than 30%, and no negative influence is caused on the taste quality of cigarette, thus achieving the purpose of selectively reducing harm.

The invention relates to biocompatible, bioabsorbable derivatized non-crosslinked chitosan compositions optionally crosslinked to gelatin/collagen by 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide hydrochloride (EDC) for biomedical use and methods of making and testing such compositions, including a modified acute systemic toxicity test. The compositions comprise derivatized chitosan reacetylated to a degree of N-deacetylation (DDA) of between about 15% and 40%. The compositions are typically bioabsorbed in about 90 days or less and can be made to bioabsorb at differing rates of speed. The compositions are initially soluble in aqueous solution below pH 6.5. The compositions have an acid content that can be adjusted between about 0% (w/w) and about 8% (w/w) to customize the composition for uses that require and/or tolerate differing levels of cytotoxicity, adhesion, composition cohesion, and cell infiltration into the composition.

The invention discloses a dentiform sphere shaped heavy oil hydrotreated catalyst and a preparation method thereof. The catalyst comprises an active composition, an addition agent and a dentiform sphere shaped aluminum oxide carrier, wherein the active composition comprises compounds of cobalt and nickel, and a compound of molybdenum or/and tungsten; the addition agent comprises a compound of phosphor, silicon, boron or halogen or compounds of any two compositions of the phosphor, the silicon, the boron and the halogen; and compositions according to gross weight of the dentiform sphere shaped heavy oil hydrotreated catalyst comprise: 2 to 6 percent of the cobalt compound, 3 to 10 percent of the nickel compound, 0 to 26 percent of the molybdenum compound, 0 to 8 percent of the tungsten compound, and 0.5 to 2 percent of the addition agent. The catalyst has the characteristics of high specific surface area, large pore volume, high strength, proper surface acid content, small bed pressure drop, low reaction temperature and high activity of hydrodesulfurization and denitrification. The preparation method comprises preparation of a precursor substance of the aluminum oxide carrier, preparation of the dentiform sphere shaped aluminum oxide carrier, preparation of a catalyst steeping fluid and preparation of the catalyst. The preparation process can be mastered and realized simply and easily.

The invention relates to a lactobacillus plantarum bacterial strain, an application thereof and pickled vegetable produced by the bacterial strain. The lactobacillus plantarum comes from a Chinese traditional fermentation food, and is a safe strain, phenyllactic acid is generated from the pickled vegetable, so that the lactobacillus plantarum can better perform the probiotic function. The provided pickled vegetable is rich in lactobacillus and phenyllactic acid, the live bacteria amount of lactics is 10<8> cfu/g, the phenyllactic acid content can reach 217mg/kg, and the pickled vegetable has high nutrition value and probiotic function.

Methods of producing a food product for mammals from the soluble by-product fraction of ethanol production are provided. One method comprises the step of incubating the treated soluble by-product fraction with an enzyme mixture capable of digesting complex polysaccharides to yield a food product having a fermentable sugar content of at least about 10% of the total carbohydrate content of the food product. Another method comprises the steps of incubating the unconcentrated soluble by-product fraction with an enzyme mixture capable of digesting complex carbohydrates followed by removal of at least a portion of the fatty acids from the digested material to render a food product having a fatty acid content of less than about 10% dry weight.

The invention discloses a heavy oil hydrotreating catalyst and a preparation method thereof; the catalyst contains a carrier and a component containing an effective amount of at least a metal component selected from VIII family and at least a metal component selected from VIB family, wherein, the carrier is a compound alumina supporter with boron, the content of boron in the carrier f is 0.3 - 5% by weight and the acid content of the carrier is 0.2 - 0.5 mmol/g based on elements and the total amount of the carrier, wherein, the amount of weak acid which is lower than 250 DEG C accounts for 50 - 100% of that of the total acid, while the amount of strong acid which is higher than 450 DEG C accounts for 0-5% of that of the total acid. Compared with the catalysts provided by the prior art, the catalyst provided by the invention improves the carbon deposit resistance obviously while keeping high hydrotreating activity.

The invention relates to a purification method of long-carbon-chain dicarboxylic acid, belonging to purification treatment of cycle-free dicarboxylic acid with more than 10 carbon atoms. The invention is characterized in that recrystallizing purification is performed by using a long-carbon-chain dibasic acid crude product produced by a microbial fermentation process as an initial raw material and methanol as a solvent. The method comprises the following steps: (1) dissolving and decolorizing: a. feeding at room temperature, b. dissolving by preheating, c. decolorizing by adsorption, and d. four-stage filtering; (2) gradient cooling and crystallization; (3) eluting and centrifugal filtration; and (4) vacuum drying. The technical indexes of the purified long-carbon-chain dicarboxylic acid are as follows: the single acid content is at least 90.20%, the total acid content is 99.60 wt%, the ash content is at most 30 ppm, the iron content on the basis of Fe2O3 is at most 2 ppm, the total nitrogen on the basis of N is at most 30 ppm, the moisture content is at most 0.4 wt%, and no ester content is detected. The purification yield of C11-C14 is greater than or equal to 98.4%. The long-carbon-chain dicarboxylic acid is suitable to be used as a polycondensation monomer to perform polycondensation reaction with diamine to synthesize the long-carbon-chain nylon, and is also suitable to be used as a raw material of synthetic perfume and drugs. The purification method of long-carbon-chain dicarboxylic acid has the advantages of favorable product color, high product purity, high refinement yield and lower cost.

The invention relates to a method for preparing a catalyst carrier. The method comprises: molding alumina dry glue powder and drying the molded alumina dry glue powder to obtain an alumina carrier; loading a solution, sol or suspension containing titanium oxide or/and a zirconium oxide precursor onto the alumina carrier by a dip coating method; and obtaining the catalyst carrier after drying and baking. The preparation method adopts dip coating to disperse titanium oxide or zirconium oxide on the surface of the carrier to modify the surface of alumina, adjust the acid content of the surface of the carrier, reduce acting force between metallic component and the carrier and finally increase the hydrogenation activity of catalyst. The catalyst carrier obtained by the preparation method has a zirconium oxide or titanium oxide content of 1 to 15 weight percent of, a specific surface area of 250 to 500m/g, a pore volume of 0.6 to 1.0ml/g and a NH3-TPD total acid content of 0.3 to 0.8 mmol/g. Moreover, the catalyst carrier is suitable to be used in the preparation of petroleum fractions hydrogenation catalyst.

A golf ball having a cover comprised of a single ionomeric resin. The resin has an acid content no greater than about 10% and is preferably 100% neutralized and has a flex modulus of at least 31,000 psi. The ball has a Shore D hardness of about 55, a PGA compression of about 85, a COR of at least 0.700 and exhibits superior cut and abrasion resistance while providing a soft feel and a high spin rate.

A golf ball material composed of (A) an olefin-containing thermoplastic polymer having an acid content of at least 0.5 wt % but less than 5.0 wt %, (B) a resin composition which includes one or more selected from the group consisting of diene polymers, thermoplastic polymers and thermoset polymers, and (C) an oxygen-containing inorganic metal compound has a good thermal stability, flow and processability, making it suitable for injection molding. The golf ball material is ideal for the production of high-performance golf balls endowed with durability, scuff resistance and optimal hardness without a loss of rebound in the molded article.

The present invention relates to an adhesive useful as a tie layer between a metal foil and polyethylene film that is a blend of two ethylene acrylic or methacrylic acid copolymers, one having a high-acid and a high-melt index and the other having a lower acid content and a lower melt index.

The invention relates to medicine. The inventive method for treating human diseases associated with an increased deoxyribonucleic acid content in extracellular spaces of tissues and organs, consists in orally injecting a DNA ferment in a quantity of 20 000-500 000 Kunz units in a day per 1 kg of the body mass. The single dose of the inventive medicinal preparation for treating human diseases associated with an increased deoxyribonucleic acid content in extracellular spaces of tissues and organs comprises 20 000-500 000 Kunz units of the DNAse ferment. The oral administration of the above-mentioned important doses of the preparation only allows the catalytically significant amount of DNAse to be absorbed into the systemic circulation in such a way that the dose-dependent treating effect thereof is exhibited.