52results about How to "Increase acid concentration" patented technology

The present invention relates to a method to enhance oil recovery from a hydrocarbon reservoir. One aspect of the invention includes injecting high salinity water into the reservoir followed by alternating the injection of low salinity water and gas.

Provided herein are methods and compositions comprising bile acid transport inhibitors and/or enteroendocrine peptide enhancing agents and/or FXR agonists for the treatment of pancreatitis or prevention of pancreatitis.

Provided herein are methods of treating or ameliorating primary sclerosing cholangitis and inflammatory bowel disease by administering to an individual in need thereof a therapeutically effective amount of an Apical Sodium-dependent Bile Acid Transporter Inhibitor (ASBTI) or a pharmaceutically acceptable salt thereof. Also provided are methods for treating or ameliorating primary sclerosing cholangitis comprising administering to an individual in need thereof a therapeutically effective amount of ASBTI or a pharmaceutically acceptable salt thereof.

The present invention relates to methods of processing lignocellulosic material to obtain hemicellulose sugars, cellulose sugars, lignin, cellulose and other high-value products. Also provided are hemicellulose sugars, cellulose sugars, lignin, cellulose, and other high-value products.

The invention belongs to the technical field of industrial waste treatment, and particularly relates to a resource recycling process and system for high-temperature plasma of chlorine-containing waste. The method comprises the steps that (1) the chlorine-containing waste is conveyed into a plasma gasifier through a feeding system; (2) synthesis gas produced through splitting decomposition is cooled by a first-stage waste heat exchanger; (3) after entering an acid absorption system to absorb acid, the synthesis gas enters an alkaline tower to be further deacidified; (4) the deacidified synthesis gas enters a secondary combustion chamber to be combusted, and generated high-temperature flue gas is cooled by a second-stage waste heat exchanger; (5) after the cooled flue gas enters a quench cooler to be subjected to quenching, the flue gas enters a bag-type dust remover for dust removal; (6) the flue gas with dust removed enters a flue heater to be warmed; (7) the flue gas enters an SCR catalytic tower to remove nitric oxide in the flue gas; and (8) after the flue gas subjected to SCR treatment enters the heat exchanger for heat exchange, the flue gas is drawn out by an induced draft fan, and the flue gas is discharged into the atmosphere through a chimney. By means of the resource recycling process and system, resource, harmless, reducing and stabilizing treatment of the chlorine-containing waste is achieved, and the system operation cost is low.

An environmentally acceptable and comparatively safe acid cleaning solution containing sulfuric acid, water and amine containing inhibitors that adequately remove oxidation or contaminants from surfaces without excessively damaging equipment. The sulfuric acid is effective in removing impurities and contaminants, while the amine moieties or amine salts reduce the otherwise damaging effect of sulfuric acid on equipment and on human skin and tissue.

The present invention relates to methods of processing lignocellulosic material to obtain hemicellulose sugars, cellulose sugars, lignin, cellulose and other high-value products. Also provided are hemicellulose sugars, cellulose sugars, lignin, cellulose, and other high-value products.

The invention discloses a processing technique for cotton seeds, pertaining to the technical filed of seed preparation before planting. Currently, an acid treatment technology is adopted to remove the residual velvet of the cotton seeds, and in order to protect the seeds against damage, strict control can be carried out on the concentration of the acid and the charing temperature of the residual velvet, as the sprouting rate and appearance of the cotton seeds can be affected due to any negligence. Therefore, the invention adds a water spray cleaning device and the working procedures thereof on the basis of the original processing technique. At the same time, the concentration of sulphuric acid in acid treatment solution is increased to 7.0-10.0 percent and the content of a foaming agent and an activating agent is reduced, wherein, the total content of the foaming agent and the activating agent is below 0.35 percent. The invention has the advantages of no residual acid, no residual velvet, lower cost, higher sprouting rate, less damage to the cotton seeds, higher safety and reliability, and glabrous appearance of the cotton seeds.

The invention provides a process for concentrating titanium white waste acid through generation of crystalline hydrate by utilizing the phase equilibrium principle. According to the process, ferrous sulfate, copper sulfate or other sulfate capable of forming crystalline hydrates are added into titanium white waste acid, the phase equilibrium process is controlled by utilizing the equilibrium relationship among sulfuric acid, water and sulfate, moisture is brought out by generating sulfate hydrates containing different crystal water and crystallizing and separating the sulfate hydrate from diluted sulfuric acid, and the diluted sulfuric acid can be concentrated; and the separated ferrous sulfate and other crystalline hydrates can be recycled after being dried to remove crystal water; different concentration degrees can be realized by controlling the mode of generated crystalline hydrate and can be adjusted according to requirement, and a concentrated sulfuric acid product having an acidconcentration of higher than 60 percent can be obtained; and anhydrous ferrous sulfate and other sulfates capable of forming crystalline hydrate can be utilized as raw materials, and the raw materials have wide sources. The process is simple, has low operation temperature, small equipment investment and weak corrosion, moisture of waste acid is not needed to be directly evaporated, energy consumption is low, and resource utilization of titanium white waste acid can be realized.

The present invention provides a polyester film for a protective material for protecting a back surface of photovoltaic cell which exhibits a good hydrolysis resistance and an excellent adhesion property to a sealing resin for photovoltaic cells. The present invention relates to a polyester film for a protective material for protecting a back surface of photovoltaic cells which is in the form of a laminated polyester film comprising the below-mentioned polyester (A) layer as at least one of outermost layers of the film and at least one below-mentioned polyester (B) layer, the laminated polyester film having a terminal carboxyl group content of not more than 26 equivalents/t, and the polyester (A) layer being provided on at least one surface thereof with a coating layer formed of a polyurethane having at least one of a polycarbonate skeleton and a polyether skeleton, and a crosslinking agent:

• • Polyester (A) layer: Layer formed of a polyester comprising an aromatic polyester as a main constitutional component and having a white pigment content of less than 8% by weight; and
  • Polyester (B) layer: Layer formed of a polyester comprising an aromatic polyester as a main constitutional component and having a white pigment content of not less than 8% by weight.

Provided herein are methods for treating or preventing gastrointestinal and/or liver infections utilizing bile acid transport inhibitors and/or enteroendocrine peptide enhancing agents and/or FXR agonists. Also provided herein are methods for increasing the levels of an enteroendocrine peptide or hormone in an individual suffering from a gastrointestinal infection or liver infection utilizing bile acid transport inhibitors and/or enteroendocrine peptide enhancing agents and/or FXR agonists.

The invention belongs to the field of chemical industry, and in particular, relates to a dilute nitric acid production process. The process includes the following steps: after ammonia evaporation andheating, adjusting the flow quantity, allowing gas ammonia to enter an ammonia-air mixer and uniformly mixing the gas ammonia with compressed air; allowing the ammonia-air mixture after mixing to enter an oxidation furnace, carrying out catalytic oxidation reaction on a platinum mesh surface, oxidizing ammonia into nitric oxide, recycling waste heat from process gas leaving the catalyst through awaste heat boiler and tail gas respectively, and then condensing by a low-pressure quick cooler, after separation of dilute acid, mixing the process gas with air from a bleaching tower, and then allowing the mixed gas to enter an oxidation nitrogen compressor; further increasing the temperature of gas through the compressed process gas; recycling waste heat of the compressed process gas, cooling,and then allowing the cooled process gas to enter an absorption tower; and carrying out a reaction of oxide of nitrogen in the absorption tower after absorption with water to generate nitric acid. Theprocess has the advantages of high nitrogen oxide absorption rate, low ammonia consumption, high acid concentration and low tail gas emission concentration, and can reach the standard without furthertreatment.

Compositions for the treatment of uric acid deficiency are disclosed. The compositions generally comprise either a precursor or derivative of uric acid, which, when administered to a patient, will result in a raising of the uric acid levels in that patient. The compositions can optionally comprise one or more additional active ingredients such as antioxidants, glutathione precursors, or inhibitors of NO synthase or homocysteine. Methods for raising uric acid levels in a patient are also disclosed. These methods are useful for in the treatment of various illnesses, such as cancer, infectious disease, Alzheimer disease and neurodegenerative diseases. Use of improved solutions comprising the present compositions in organ preservation is also disclosed.

An object of the present invention is to provide a membrane-electrode assembly for solid polymer electrolyte fuel cells, which can impart high electrical properties by increasing the introduction amount of the sulfonic acid group, has excellent swell suppression effect even under the humidified condition of high-temperature, and which has excellent electrical properties even under the condition of high-temperature and low-humidity. By using sulfonated polyarylene having specific constitutional units as a proton conductive membrane, a membrane-electrode assembly for solid polymer electrolyte fuel cells can be provided which has excellent swell suppression effect even under the humidified condition of high-temperature, and which has excellent proton conductivity even under the condition of high-temperature and low-humidity.

The invention relates to a method for producing phosphoric acid and low-silicon gypsum by a middle-low-grade phosphorus ore. According to the method, ferrous-iron-containing waste acid is diluted by magnesium removal waste liquid, the diluted ferrous-iron-containing waste acid and the phosphorus ore react, easily decomposed components such as carbonate in the phosphorus ore are decomposed, so thatacid consumption of subsequent phosphate leaching reaction is reduced, the quality of the phosphorus ore is improved, production cost is reduced, the gypsum is screened to remove part of silicon, phosphorus content is reduced, so that the gypsum serves as a good cement raw material, application approaches are provided for wide comprehensive utilization of phosphogypsum, filter flushing water of wet phosphoric acid slurry is recycled after being filtered to remove slag, water consumption is reduced, and phosphoric acid concentration is improved.

The invention discloses a heavy metal adsorbent for purifying a dilute acid and application thereof. The heavy metal adsorbent is prepared by mixing the following components in order: 50-70 parts of a 30% ammonium dimethyldithiocarbamate aqueous solution, 2-5 parts of sodium sulfite, 10-30 parts of a 17%-20% ammonium sulfide aqueous solution, 10-20 parts of a 5% thiourea aqueous solution and 2-5 parts of tannic acid. The heavy metal adsorbent is filled into a filtration adsorption tower, waste acid is introduced into the filtration adsorption tower, purified dilute acid enters a plate-type heat exchanger for cooling via a dilute acid circulation tank, and after cooling, the cooled dilute acid is introduced into a two-level dynamic wave washing tower for flue gas washing. The product can effectively remove heavy metal ions from the waste acid, and overcomes the problem of poor treatment effect of a conventional DTC heavy metal adsorbent in acidic environment. The heavy metal adsorbent is combined with a dilute acid purifying reuse method, the acid concentration of the cyclic dilute acid can be significantly enhanced without affection of the process conditions, dilute acid emission can be reduced, the consumption of water in purification process can be reduced, and the water saving emission reduction effect is remarkable.

This invention discloses a bioadhesive boric acid formulation and its preparation method. Specifically, preferred vaginal bioadhesive boric acid formulation mainly comprises chitosan, carbopol 974 , polycarbophil, boric acid, and purified water as a gel. The main performance characteristic of this vaginal boric acid preparation is the ability of the formulation to retain and release boric acid in the vagina by using a combination of carbopol 974 and polycarbophil as preferred bioadhesive polymers. It was proved experimentally that boric acid as the antibacterial component of this gel can be maintained at a relatively high concentration (>10 mg/mL) in vagina for an extended period of time (>2 hours) with the use of a combination of polyacrylic acid polymers, i.e. carbopol 974 and polycarbophil. In order to prepare a gel of the said formulation with uniform continuity, boric acid was dissolved in water at the beginning of the process to make an aqueous solution and the bioadhesive polymers were added portion-wise into the aqueous solution with vigorous stirring. Further, it was demonstrated that the said vaginal bioadhesive boric acid formulation had a dynamic viscosity >100000 cps, pH value of 2 to 5, good moisture-retention capability. The formulation was non-allergenic, non-vaginal irritative, and capable of inhibiting bacteria and fungi.

Provided are a sulfonated polymer capable of high hot water resistance even if it has an increased amount of the sulfonic groups introduced therein, and a solid polymer electrolyte containing the sulfonated polymer that has high proton conductivity and excellent generating performance.

The sulfonated polymer has repeating units represented by the formula (1′):

wherein B's are each independently an oxygen or a sulfur atom, R¹ to R³ may be the same or different and are selected from a hydrogen atom, a fluorine atom, a nitrile group and an alkyl group, n is an integer of 2 or greater, and Q is a structure represented by the formula (q):

wherein A is independently a divalent atom or organic group or a direct bond, and R⁴ to R¹¹ may be the same or different and are selected from a hydrogen atom, a fluorine atom, an alkyl group and an aromatic group.

It is intended to provide a substance having an effect of shrinking pores by analyzing the mechanism of making pores perceptible and compositions such as a skin preparation for external use which exerts the above effect to thereby make pores imperceptible. As means for solving these problems, there are provided a parakeratosis inhibitor and a pore-shrinking agent comprising an antagonist to an excitatory cell receptor, for example, a glutamate receptor such as N-methyl-D-aspartic acid receptor or an ATP receptor such as P2X receptor, or an agonist to an inhibitory cell receptor such as a γ-aminobutyrate receptor such as bicuculline-sensitive receptor having the Cl— channel therein or glycine receptor, as well as a skin preparation for external use aiming at inhibiting parakeratosis and a skin preparation for external use aiming at shrinking pores each containing such an antagonist to an excitatory cell receptor or an agonist to an inhibitory cell receptor as described above. Owing to the effects of inhibiting parakeratosis and shrinking pores, the skin can be maintained in a healthy state without perceptible pores.

The invention discloses a process for eliminating red fume discharged by a waste acid regenerating device and aims to solve the problem that the waste acid regenerating device has the phenomenon of discharging the red fume in the acid water conversion process in the prior art. According to the process, as a dechlorinating tower is added between a preconcentrator and an absorption tower, and new acid and regenerated acid are introduced into the dechlorinating tower, on one hand, the acid concentration of the preconcentrator is increased, and the purpose that a ferric oxide powder is fully reacted with free acid in the preconcentrator is reached; on the other hand, ultrafine ferric oxide powder enters the dechlorinating tower and is removed, so that the phenomenon that the acid regenerating device discharges the red fume can be completely avoided, and discharged tail gas of a roasting furnace can be fully ensured to reach Emission Standard of Air Pollutants for Steel Rolling Industry GB28665-2012 which is newly issued by the country. Therefore, the process is suitable for popularization and application.

The invention discloses a method for preparing a silver-loaded hydrogen sulfide poisoning-resistant 4A molecular sieve from attapulgite serving as a raw material, and belongs to the technical field ofpreparation of a molecular sieve. The method comprises the following steps: firstly, pretreating the attapulgite; mixing the pretreated attapulgite and an alkali liquid and performing microwave heating; preparing a sodium aluminate solution, performing crystallization, and performing silver loading on the 4A molecular sieve obtained through crystallization through supercritical carbon dioxide; and finally obtaining the silver-loaded 4A molecular sieve. The silver-loaded 4A molecular sieve prepared by the method is applied to mercury removing experiment under the simulated natural gas atmosphere, and the 4A molecular sieve with the silver loaded quantity of 1.5 percent is selected. The silver is loaded by other loading methods, the mercury removing efficiency experiment is conducted underthe atmosphere of different H2S concentration through comparison, and the experiment proves that the silver-loaded 4A molecular sieve has high mercury removing efficiency and has H2S poisoning resistance. The silver-loaded molecular sieve can maintain high mercury removing efficiency under the atmosphere containing H2S.

The present invention provides a novel gene involved in the growth-promoting function of acetic acid bacteria and a microorganism containing the gene. In particular, the present invention provides a method for enhancing the growth-promoting function of acetic acid bacteria and a method for efficiently producing vinegar containing acetic acid at a high concentration in a short time using such acetic acid bacteria having an enhanced growth-promoting function.