108 results about "Acid release" patented technology

The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for degrading filter cake deposited on a subterranean formation. One embodiment of the present invention provides a method of creating particulates coated with acid-releasing degradable material on-the-fly comprising the step of: combining an acid-releasing degradable material with a solvent or a plasticizer to create a coating solution; and, coating the coating solution onto a particulate on-the-fly to create coated particulates. Another embodiment of the present invention provides a gravel pack comprising gravel particles coated on-the-fly with an acid-releasing degradable material.

Improved methods and compositions for degrading filter cake deposited in a subterranean formation are provided. These methods and compositions utilize particulates coated with acid-releasing degradable material wherein the released acid is used to degrade a filter cake.

An atmospheric leach process in the recovery of nickel and cobalt from lateritic ores, said processing including the steps of: a) separating the lateritic ore into a low magnesium containing ore fraction, and a high magnesium containing ore fraction by selective mining or post mining classification; b) separately slurrying the separated ore fractions; c) leaching the low magnesium containing ore fraction with concentrated sulphuric acid as a primary leach step; and d) introducing the high magnesium content ore slurry following substantial completion of the primary leach step and precipitating iron as goethite or another low sulphate containing form of iron oxide or iron hydroxide, wherein sulphuric acid released during iron precipitation is used to leach the high magnesium ore fraction as a secondary leach step.

The invention relates to a water retaining material, a preparation method thereof and an application of the water retaining material in a filter rod. The invention is characterized in that water-retaining substances and alkaline components are introduced into a porous material with larger specific surface area simultaneously, and the water-retaining material for selectively reducing hydrogen cyanide (HCN) in mainstream cigarette smoke is obtained. The material has certain content of water due to water-retaining substances in the material, simultaneously the alkaline components can generate acid-alkaline reaction with the hydrophilic HCN in the mainstream cigarette smoke, and the selective harm reduction performance of the material to the HCN in the mainstream cigarette smoke is further enhanced. 10-40mg of the material is added in per piece of the filter rod of the cigarette, therefore, the release amount of the hydrogen cyanide in the mainstream cigarette smoke can be reduced by more than 30 percent, while the release amount of tar is basically not changed or reduced slightly, and simultaneously no bad influence is caused on the smoking quality of cigarettes, and the purpose of realizing selective harm reduction is further achieved.

The invention discloses a wetting liquid for fabric pattern transfer. The wetting liquid comprises the following components by weight of 20-80% of water, 10-70% of organic solvent, 3-15% of water absorbent, 0.5-5% of base-releasing agent or acid-releasing agent and 0-20% of solvent-resistant thickener. By wetting the fabric with the wetting liquid, the problem that fabrics of a hydrophobic fabric in the wetting pattern transfer is difficult to wet uniformly is solved relatively thoroughly. The influence of the natural fiber such as cotton comprising the unremovable fat to the fabric wetting when performing the wetting pattern transfer is solved relatively thoroughly. The influence of the oil contamination on the fabric of the hydrophobic fabric in the wetting pattern transfer is removed relatively thoroughly in the process of fabric weaving.

The present invention relates to the use of pharmaceutically acceptable zinc salts, preferably water soluble zinc salts alone or optionally, in combination with one or more of a protein pump inhibitor (PPI), H2 blocker, anti-H. pylori antibiotic / antimicrobial, cytoprotective agent or a combination agent as otherwise described herein for providing fast action with optional long duration effect in reducing gastric acid secretion, raising the pH of the stomach during resting phase as well as decreasing the duration of stomach acid release during a secretagogue phase and for treating conditions including gastroesophageal reflux disease (GERD), non-erosive reflux disease (NERD), Zollinger-Ellison syndrome (ZE disease), ulcer disease, and gastric cancer, as well as preventing or reducing the likelihood of ulcer disease. In addition, the present methods are useful for treating patients who are non-responsive to proton pump inhibitors (PPI) and as an alternative to traditional therapies or conditions which are caused by rapid and complete inhibition of secretagogue induced acid secretion. The present invention also relates to the use of one or more water soluble zinc salts, administered in combination with a therapeutic compound or agent (second therapeutic agent) which may be delivered orally with enhanced bioavailability (compared to compounds which are administered in the absence of water soluble zinc salts) or other favorable benefits. In addition, therapeutic agents which exhibit sensitivity to low pH may be advantageously orally administered in combination with an effective amount of at least one water soluble zinc salt. Compositions according to the present invention exhibit greater bioavailability of the active agent when formulated in combination with a water soluble zinc salt in oral dosage form than when administered with the water soluble zinc salt.

The invention relates to a solid acid for acid fracturing capacity increasing revamping and a preparation method for the solid acid. The solid acid is in form of inert water-insoluble solid powder or particles under a normal temperature condition, and comprises the following components in parts by weight: 10 to 85 parts of compound capable of generating a strong acid, 10 to 85 parts of water-insoluble compound which can be hydrolyzed into an organic acid, and 0.1 to 10 parts of fluxing agent. A water dispersion system of the solid acid can be slowly dissolved within four hours under the temperature condition of over 100 DEG C, and generates enough acids, so that an acid release rate under a high temperature condition can be effectively controlled, and the technical requirements of the deep acid fracturing revamping of a high-temperature carbonate reservoir can be completely met.

The invention provides an acid controllable rigid temporary plugging agent and a preparation method thereof. The raw materials of the acid controllable rigid temporary plugging agent comprise a resinmatrix, wherein the resin matrix comprises polylactic acid and polyglycolic acid with a mass ratio of (1-9): 1. The preparation method of the acid controllable rigid temporary plugging agent comprisesthe following steps: mixing the raw materials of the rigid temporary plugging agent, then melting, blending and granulating at 160-270 DEG C to obtain the acid controllable rigid temporary plugging agent. The acidic controllable rigid temporary plugging agent has high plugging strength, easy crushing, controllable dissolution speed and controllable acid release amount.

The invention discloses a one-bath dyeing method for brocade cotton through reactive dyes. The method comprises steps as follows: step (1), brocade cotton cloth is pretreated, dye liquor is added, and the bath ratio of the brocade cotton cloth to the dye liquor is 1: (4-6); step (2), the dye liquor is gradiently heated to 95-100 DEG C, the cloth is kept at the temperature to be dyed for 30-40 min, the dye liquor is cooled to 80-85 DEG C, a dyeing accelerant solution is added, and color fixation is performed for 40-50 min; step (3), the dyed brocade cotton is obtained through aftertreatment after dyeing in the step (2) is completed. One-bath dyeing of the brocade cotton is realized through coordination of the temperature, an acid-releasing agent, anhydrous sodium sulphate and the reactive dyes, a process is simple, energy is saved, and the prepared dyed brocade cotton has high washing fastness and small chromatic aberration.

The invention relates to a process for converting ammonium salts of organic acids to the particular free organic acid, wherein an aqueous solution of the ammonium salt is contacted with an organic extractant and the salt is dissociated at temperatures and pressures at which the aqueous solution and the extractant are in the liquid state, and a stripping medium or entraining gas is introduced in order to remove NH3 from the aqueous solution and transfer at least a portion of the free organic acid formed to the organic extractant. The invention described here thus provides an improved process for releasing an organic acid, preferably a carboxylic, sulphonic or phosphonic acid, especially an alpha-hydroxycarboxylic acid or beta-hydroxycarboxylic acid, from the ammonium salt thereof by release and removal of ammonia and simultaneous extraction of the acid released with a suitable extractant from the aqueous phase. This process corresponds to a reactive extraction. The reactive extraction of an organic acid from the aqueous ammonium salt solution thereof can be improved significantly by the use of a stripping medium or entraining gas, for example nitrogen, air, steam or inert gases, for example argon. The ammonia released is removed from the aqueous solution by the continuous gas stream and can be fed back into a production process. The free acid can be obtained from the extractant by a process such as distillation, rectification, crystallization, re-extraction, chromatography, adsorption, or by a membrane process.

The present invention relates to the use of pharmaceutically acceptable zinc salts, preferably water soluble zinc salts alone or optionally, in combination with one or more of a protein pump inhibitor (PPI), H2 blocker, anti-H. pylori antibiotic / antimicrobial, cytoprotective agent or a combination agent as otherwise described herein for providing fast action with optional long duration effect in reducing gastric acid secretion, raising the pH of the stomach during resting phase as well as decreasing the duration of stomach acid release during a secretagogue phase and for treating conditions including gastroesophageal reflux disease (GERD), non-erosive reflux disease (NERD), Zollinger-Ellison syndrome (ZE disease), ulcer disease, and gastric cancer, as well as preventing or reducing the likelihood of ulcer disease. In addition, the present methods are useful for treating patients who are non-responsive to proton pump inhibitors (PPI) and as an alternative to traditional therapies or conditions which are caused by rapid and complete inhibition of secretagogue induced acid secretion.

The invention relates to a dexlansoprazole sustained-release capsule and a preparation method thereof. The capsule comprises two dexlansoprazole micropills, wherein the two micropills consist of hollow pill cores, active medicine layers, isolating coating layers and sustained-release coating layers. The dexlansoprazole sustained-release capsule provided by the invention can be released in the intestinal tract in position so as to persistently inhibit acid release.

The invention discloses a preprocessing size for textile printing. The preprocessing size comprises the following compositions in percentage by weight: 5-50% of a hot melting material, 0.5-15% of a printing gum, 0.5-6% of an acid-releasing agent or an alkali-releasing agent, 0-20% of a water-absorbent, and the balance of water. The invention also discloses a preparation method and applications of the preprocessing size for textile printing. According to the invention, a conventional wet transfer film or wet transfer paper is used for hot-melting transfer printing, so that the hot-melting transfer printing is implemented without specially coating a hot-melting carrier, and hot-melting printing ink does not need to be specially configured, thereby greatly reducing the cost of hot-melting transfer printing. The preprocessing size for textile printing and the preparation method and applications of the preprocessing size disclosed by the invention are applied to the hot-melting transfer printing of textiles, the process is simple, the quality is easily controlled, and the graded product rate of hot-melting transfer printing is greatly improved; and according to the invention, the hot-melting transfer printing is implemented without using an expensive coating machine and just through using common wet transfer equipment, thereby facilitating the popularization of an environmental-friendly process of hot-melting transfer printing.

The invention relates to a colored light consistency dyeing method for wool / nylon blended fabric. The method comprises the following steps: placing pretreated wool / nylon blended fabric into a dye vat, injecting water, adding a dyeing auxiliary agent, running and adding a reactive dye for wool, running for 5-15 min, adding a neutral metal complex dye, running for 5-15 min, stepwise heating, cooling and adding an acid-releasing agent, running and then heating, cooling and draining; injecting water after draining, adding soda ash, and draining; injecting water, adding glacial acetic acid, and draining; injecting water, adding a dye-fixing agent, carrying out thermal insulation at 70 DEG C for 10-30 min, draying, and drying. By one-bath two-stage process for dyeing, the obtained fabric can greatly reach colored light consistency, the defect of uneven dyeing in the prior art is overcome, and the method is beneficial to application and development of wool / nylon blends.

The invention discloses a nickel oxide ore acid leaching solution two-step iron removal method. The method comprises the following steps: adding garnierite ore pulp into a nickel oxide ore acid leaching solution, stirring and reacting until the dissolution is completed and the pH value of the solution is more than or equal to 1.6, performing liquid-solid separation, raising the temperature of obtained liquid to 130-170 DEG C, stirring and reacting for 1-3 hours, performing liquid-solid separation, and drying a solid to obtain a hematite product; adding the garnierite ore pulp into the collected liquid for the second time, stirring and reacting until the dissolution is completed and the pH value of the solution is about 2, performing liquid-solid separation, and adding magnesium oxide and an oxidizing agent into the obtained liquid, or only adding the oxidizing agent; stirring and reacting for 0.5-4 hours, performing liquid-solid separation, and drying the solid to obtain a goethite product. By adopting the method disclosed by the invention, complete iron removal can be achieved under a relatively mild condition; hematite and goethite which can be directly sold can be obtained; meanwhile, residual acid in the acid leaching solution and acid released in the iron deposition process are recycled; loss of nickel, cobalt, aluminum and magnesium in the leaching solution can not be generated.

The invention discloses a smart dimming film and a preparation method thereof. A temperature-sensitive polymer and various assistants are dissolved in a sodium alginate aquagel main body without temperature-sensitive effect to obtain a smart dimming film with certain mechanical strength and favorable temperature sensitivity. The preparation method comprises the following steps: preparing the temperature-sensitive polymer, various assistants, sodium alginate and the like into a water solution, and adding a water-insoluble multivalent metal salt and an acid-releasing agent to slowly form a cross-linked gel, thereby obtaining the smart dimming film. The preparation method disclosed by the invention is simple to operate and low in cost, and can be performed at room temperature; and the obtained smart dimming film has certain strength and favorable temperature sensitivity.

The invention discloses a preparation method of RNA nucleic acid releasing agent and PCR amplification reagent freeze-dried microspheres and application. The invention relates to the technical field of biology, and solves the problems that an RNA nucleic acid releasing agent and a PCR amplification reagent cannot be transported and stored at normal temperature, and the operation is tedious duringuse. The preparation method comprises the following steps: respectively adding the RNA nucleic acid releasing agent and the PCR amplification reagent into a ribozyme-free centrifugal tube in proportion, uniformly mixing to obtain a mixed solution, pouring liquid nitrogen into a sterile medicine cup, dropping the mixed solution into the liquid nitrogen in a volume of 10mu L by using a pipette, condensing into round balls, and using a sterile film to seal the medicine cup, puncturing a plurality of holes in the sterile film, placing the medicine cup in a pre-cooled freeze dryer, setting the coldtrap temperature of the freeze dryer to be -69 DEG C, performing vacuum freeze drying for 6 h or above, and obtaining the RNA nucleic acid releasing agent freeze-dried microsphere and the PCR amplification reagent freeze-dried microsphere respectively. The freeze-dried microspheres are good in stability, convenient to use, the time can be saved, the efficiency is improved, and the cost is reduced.

The invention discloses a method for preparing hydrogen chloride and ammonia by utilizing ammonium chloride, belonging to the field of recycling of ammonium chloride. The method comprises: excessive ammonium bisulphate is taken as reaction intermediate, firstly hydrogen chloride is prepared, ammonium sulphate and ammonium bisulphate which are obtained by reaction are added into an alcoholic solution, crystallization and separation are carried out, the separated ammonium sulphate is decomposed to obtain the ammonia and ammonium bisulphate, and the ammonium bisulphate reacts with the ammonium chloride to prepare hydrogen chloride gas. Ammonium bisulphate and alcoholic solvent can be recycled in the reaction process, excessive ammonium bisulphate can be added during the hydrogen chloride preparation process, thus not only the molten material system is ensured to have good fluidity and be fully contacted with the ammonium chloride, so as to speed up reaction, but also the ammonium chloride sublimation amount is reduced, the hydrogen chloride gas purity is improved, the intermediate separation step is added, the reaction speed and the reaction efficiency are improved, and the acid release reaction and the ammonium release reaction can be carried out stably.

The invention discloses an acid esters coordination directional glue crushing method which belongs to the technical field of fracturing technique in production of an oil field, and comprises the steps of adding acid in prepad fluid and adding ester in sand carrying liquid. As for the acid esters coordination directional glue crushing method, not only is the sand carrying capability of the sand carrying liquid not influenced, but also the acid releasing speed and the acid releasing capability can be controlled reasonably, so that the environment of pH less than or equal to 7.5 can be created for polyhydroxy-alcohol system fracturing liquid, therefore, polyhydroxy-alcohol system jelly is hydrated completely and a glue returning phenomenon can not be caused.

The invention relates to a pad in a fowlery, which is prepared from an absorbent, an acid-releasing agent and an inhibiting agent. The acid-releasing agent is added to release acidic substances used for absorbing ammonia; the inhibiting agent is added to reduce the activity of bacteria, inhibit chicken manure from fermenting and inhibit coccidian gemma from breeding; and the absorbent is added toregulate the water content of the fowl manure and absorb the offensive odor produced by the fermented fowl manure. The pad can maintain the concentration of NH3 and H2S in the chicken house for a longtime and control the production of NH3 and H2S, thereby having the functions for regulating the environment of the fowlery, improving the living environment of the fowl and reducing the outbreak of diseases. The pad has the characteristics of low cost, long acting time, no damage and stable storage, is suitable for line-haul and is economical and practical.

Disclosed is a chemical-amplification negative-working photoresist composition used for photolithographic patterning in the manufacture of semiconductor devices suitable for patterning light-exposure to ArF excimer laser beams and capable of giving a high-resolution patterned resist layer free from swelling and having an orthogonal cross sectional profile by alkali-development. The characteristic ingredient of the composition is the resinous compound which has two types of functional groups, e.g., hydroxyalkyl groups and carboxyl or carboxylate ester groups, capable of reacting each with the other to form intramolecular and / or intermolecular ester linkages in the presence of an acid released from the radiation-sensitive acid generating agent to cause insolubilization of the resinous ingredient in an aqueous alkaline developer solution.

The invention discloses a method for adjusting a pH value with oligosaccharide during synthesizing TS-1. Oligosaccharide is added at the crystallization phase of a TS-1 synthesis process, and the acid released from carbonization of the oligosaccharide under a hydrothermal condition is used for adjusting the pH value. In the invention, the oligosaccharide is added in one time before crystallization of a TS-1 synthesis clear liquid, or in batches during the crystallization phase. The TS-1 synthesized by the invention is free of penetrating filtration phenomenon and is difficult to generate non-framework titanium.

The invention discloses a dyeing method for nylon-56 fibers. The dyeing method comprises the following steps that 1, dye liquor is prepared, wherein the dye liquor is prepared from acid dye, a leveling agent O and an acid-releasing agent shown in a formula I; 2, the nylon-56 fibers are immersed into the dye liquor, and dyeing is achieved at the temperature of 50 DEG C-90 DEG C. According to the dyeing method, the acid-releasing agent can be gradually decomposed into polyether and butanedioic acid at high temperature (higher than or equal to 50 DEG C), the pH value in a dyeing bath is controllably decreased by regulating the adopted polyether structure, therefore, the pH value of the nylon-56 fibers is gradually decreased to 3.5-4 from 6.5-7 in the initial dyeing stage, and the dyeing process is carried out smoothly and slowly.

The invention discloses a nucleic acid releaser and a method for quickly extracting nucleic acids from dried blood spots. The nucleic acid releaser is formed by adding Tris-HCl, EDTA (ethylene diamine tetraacetic acid), MgCl2, Trixon X-100, KCl and proteinase K into sterilized water and mixing. The concentration of the Tris-HCl is 10-50 mM / L, the concentration of the EDTA is 1-5 mM / L, the concentration of the MgCl2 is 10-50 mM / L, the concentration of the Trixon X-100 is 1-10 mM / L, the concentration of the KCl is 2-20 mM / L, and the concentration of the proteinase K is 0.05-0.1 mg / mL. The method for quickly extracting nucleic acids from dried blood spots utilizes the nucleic acid releaser to obtain the target nucleic acids. The nucleic acid releaser and method are convenient to operate, can be used for quickly extracting and purifying nucleic acids in dried blood spots and other blood samples, and have the advantages of high repetitiveness, high specificity, lower cost, higher use safety and wide applicability.

A photosensitive composition comprising: an acid-decomposable compound having at least one substituent which is decomposed by an acid, forming a product which reacts with alkali solution and forms -COO- or -SO3-; and a compound which generates an acid when exposed to a chemical radiation. If necessary, the composition further comprises an alkali-soluble polymer. The acid-decomposable compound is one which is represented by the following formula (1), and the alkali-soluble polymer has a softening point of 150° C. or more and an average molecular weight of 3000 to 8000. When used as photoresist, the composition can form a fine resist pattern.where R1 and R2 are either the same or different, each of which represents at least one selected from the group consisting of hydrogen, halogen atom, cyano group, nitro group, silyl group, and monovalent organic group; X represents <C=O or -SO2-; Y represents a divalent organic group; R1 and R2 can be bonded together, forming a ring; and at least one of R1, R2, and Y has a substituent which is decomposed by an acid.

Disclosed is a chemical-amplification negative-working photoresist composition used for photolithographic patterning in the manufacture of semiconductor devices suitable for patterning light-exposure to ArF excimer laser beams and capable of giving a high-resolution patterned resist layer free from swelling and having an orthogonal cross sectional profile by alkali-development. The characteristic ingredient of the composition is the resinous compound which has two types of functional groups, e.g., hydroxyalkyl groups and carboxyl or carboxylate ester groups, capable of reacting each with the other to form intramolecular and / or intermolecular ester linkages in the presence of an acid released from the radiation-sensitive acid generating agent to cause insolubilization of the resinous ingredient in an aqueous alkaline developer solution.

The invention discloses a dyeing technology of polyamide fibers, comprising the following steps: (1) adding soda ash Na2CO3 in water until the pH value of the water is 8.8-9.2, adding the cloth in the water with the ratio of the cloth to the water being 1lg:10L, adding dyes telon yellow, telon blue, telon emerald blue to the water and mixing to form a dye liquor, and adding levelling agent to the dye liquor, wherein weight ratio of the telon yellow to the cloth is 0.045:1, the weight ratio of the telon blue to the cloth is 0.015:1, the weight ratio of the telon emerald blue is 0.24:1, and the weight ratio of the levelling agent to the cloth is 0.04:1; and (2) heating up the dye liquor to 70 DEG C, then adding acid-releasing agent to the dye liquor, wherein the ratio of the acid-releasing agent to the water is 0.4g:1L, and the acid-releasing agent is added to the dye liquor at a speed of 0.0067-0.008g / min to reduce the pH value of the dye liquor to 6.5. According to the invention, the technology dyes the cloth uniformly, and greatly reduces the cost of repair or rework.

The invention discloses a polyamide fiber dyeing technology which comprises the following steps: 1) adding baking soda to water, adjusting the pH value to be 9.5, adding cloth with a bath ratio of 3:20, adding dye c, telon yellow, telon blue and telon emerald blue, mixing water and the dyes into a dye liquid with the weight ratio of the dye telon yellow to the cloth being 0.05:1, the weight ratio of the dye telon blue to the cloth being 0.05:1, the weight ratio of the dye telon emerald blue to the cloth being 0.5:1, a leveling agent added in the dye liquid and the weight ratio of the leveling agent to the cloth being 0.05:1; and 2) after the dye liquid is heated to 70 DEG C, adding a 0.4g / L acid release agent to the dye liquid, adjusting the dye liquid pH to 6, heating the dye liquid to 90-92 DEG C, and keeping warm for 30 minutes. The polyamide fiber dyeing technology is more even in coloring, and improves the quality of a finished product.