1957 results about "High water content" patented technology

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

The invention is related to a hydrated silicone hydrogel contact lens having a layered structural configuration: a lower water content silicone hydrogel core (or bulk material) completely covered with a layer of a higher water content hydrogel totally or substantially free of silicone. A hydrated silicone hydrogel contact lens of the invention possesses high oxygen permeability for maintaining the corneal health and a soft, water-rich, lubricious surface for wearing comfort.

An ophthalmic device is disclosed that is a polymerization product of a monomeric mixture comprising (a) a major amount of a non-silicone-containing hydrophilic monomer; (b) a hydrophobic monomer; and (c) a crosslinking agent, wherein the ophthalmic device has an equilibrium water content of at least about 70 weight percent and further wherein the ophthalmic device has an evaporative dehydration barrier layer on the surface thereof. A method for the mitigation of evaporative corneal dehydration employing the high water content ophthalmic device is also disclosed.

A silicone hydrogel formulation may contains random and / or block copolymers or oligomers or macromers. The silicone copolymer is copolymerized or blended with other polymers or monomers or macromers to obtain final formulation. The silicone hydrogel may contain crosslinking groups to provide a complete or partially crosslinked final structure. The silicone hydrogel formulation may be pre-formed as a film or other structure, or it may be polymerized during application as in the case of an adhesive formulation. A wound dressing comprising a silicone hydrogel formed as a film, either prior to application to a wound or in situ on a wound, which film has gas permeability, moisture permeability, and high water content, wherein said silicone hydrogel is formed from a polymerizable silicone such as a difunctional polydimethylsiloxane methacrylate and crosslinking agents such as N,N-dimethyllacrylamide (DMA), 2-hydroxyethyl methacrylate (HEMA), and trimethylsiloxy silane (TRIS).

A scale high-speed composting treatment method of organic wastes comprises the following steps: the organic wastes are taken as fermentable substrates; thoroughly decomposed materials are reused as desiccants and strains; the physicochemical property of the organic wastes is adjusted to the condition required by aerobic fermentation microorganism; forced aeration fermentation is carried out in airiness fermentation plants; the fermentation temperature of fermentation materials is increased to over 70 DEG C in a very short time and high temperature fermentation is maintained for 1-15 days; organic wastes with high water content are quickly dehydrated to below 20-60% in short time and then are transferred to a static forced aeration fermentation system for secondary fermentation; therefore, the water ratios of the fermentation materials are further reduced, the fermentation temperature drops to the ambient temperature and always remains the same, and the materials are thoroughly decomposed. The method realizes scale high-speed composting treatment of the organic wastes and boosts resource treatment of such organic wastes as municipal and industrial sludges.

The invention discloses an anti-microbial healing-promoting hydrogel dressing and a preparation method therefor. The main ingredients of the dressing are water-soluble high-molecular polymers, functional polymers with pseudoplastic, anti-microbial agents and water. The above ingredients are dissolved into a whole after a series of technologies. The solution is poured into a mold, and the hydrogel dressing is obtained after curing and irradiation disinfection. The results of wound healing experiments and in vitro anti-microbial experiments show that the hydrogel dressing can promote wound healing effectively, and has good bacteriostatic activity to multiple bacteria (the sterilizing rate is above 70%). The anti-microbial healing-promoting hydrogel dressing is better than existing hydrogel dressings obviously, and has advantages of substantial anti-microbial curative effects, transparency, high water content, simple preparation method, pure product, nontoxicity, innocuousness, no stimulation, good biocompatibility and the like. The hydrogel dressing is suitable for large-area promotion and application.

The invention discloses a neutral inorganic composite material for dehydration, solidification and modification of high water content sludge. The composite material comprises a powdery mixture consisting of the following components in part by weight: 100 parts of water hardened solidifying material consisting of hydrated gypsum and magnesium oxide, 80 to 120 parts of inorganic water absorption ash material, 20 to 40 parts of inorganic substance aid hardened material, 1 to 10 parts of high polymer coagulant and 1 to 5 parts of modifying functional agent. After being treated by the neutral inorganic composite material, the solidified sludge has high compressive strength; the pH of the lixivium is neutral, and meanwhile, harmful substances such as heavy metal and the like in the sludge can be effectively solidified; the treated sludge meets the requirement of landfill soil, soil for earthwork or soil for greening and farmlands; and the neutral inorganic composite material can be widely applied to the dehydration, solidification and modification of the high water content sludge such as sludge from waterworks, dredged bottom mud of rivers and lakes, residual building soil and the like.

The present invention relates to a process for preparing tert-butanol (TBA) by reacting an isobutene-containing hydrocarbon mixture with water over a solid acid catalyst in a reactor cascade, wherein at least one reactor is supplied alternately with two different isobutene-containing hydrocarbon mixtures, of which one has both a higher tert-butanol content and a higher water content than the other mixture.

The invention discloses hard rock shield construction equipment which is suitable for a single stratum of soft soil, soft rock, hard rock and the like and is simultaneously suitable for a soft and hard alternate stratum and a transition stratum, particularly silt, clay, powder, sand, gravel, decayed rock stratum. In the invention, two tunneling modes can be realized: an earth pressure balance tunneling mode and an open tunneling mode. When an excavated surface has poor stability or soft soil, a sand stratum and a sand gravel stratum with high water content are excavated, the earth pressure balance tunneling mode is used for construction; and when surrounding rock of the excavated surface can be self-stabilized, the open mode is used for construction when the rock stratum has high stability, particularly, a composite cutter head is used for tunneling. The equipment has extremely strong geological adaptability, is particularly suitable for construction of a soft and hard complex stratum of a municipal metro, and also has low construction interference and is convenient to control; and the overall manufacturing cost is greatly reduced compared with a hard rock tunneling machine.

The invention discloses a method for preparing an Ag-carrying bacterial cellulose hydrogel antimicrobial dressing and a product thereof. The method comprises the following steps of: soaking a bacterial cellulose hydrogel film in solution of silver metal precursor; then heating the film to be between 121 and 135 DEG C in a high-pressure sterilizing pot, and pressurizing between 0.205 and 0.313MPa; standing bacterial cellulose for 5 to 30min; and then taking the treated bacterial cellulose out for washing, partial dehydration, packaging and sterilization to obtain an Ag-carrying bacterial cellulose hydrogel antimicrobial dressing which is formed by compounding silver metal nano-particles and bacterial cellulose and is attached with 0.01 to 10 weight percent of the silver metal nano-particles in a bacterial cellulose three-dimensional porous network structure. The preparation process of the invention has the advantages of simplicity, easiness, convenient operation, controllable preparation technology, no pollution and low cost; and the prepared nano-particles have the advantages of high purity, small particle size, uniform size and good dispersity. The obtained Ag-carrying bacterial cellulose hydrogel antimicrobial dressing has the characteristics of good antimicrobial property, high water content, good water-retaining property, strong toughness, good air permeability and the like, and can meet the requirements of treating various wounds by a wet method.

A powder coating containing aerogel particles and a method for preparing the same relates to a powder coating and a preparation method, which solves the problem that the existing heat insulating composite material containing aerogel is not suitable for making thinner heat insulation material and spraying insulation layer on the component surface, and the aqueous coating has high water content, long construction period and low heat insulation property. The coating of the invention is prepared by 5-80 percent of aerogel particles and 20-95 percent of powderedd resin by volume percentage, and the method includes the following steps: firstly, aerogel, resin and additive are mixed by volume percentage; secondly, the mixed materials are delivered into a melting-extruder melt and extrude; thirdly, the extrudate is pressed into thin sections; fourthly, the thin sections are ground into small pieces by roller machine; fifthly, the small pieces are conveyed into an air staged milling equipment to grind, so as to obtain the powder coating. The powder coating containing aerogel of the invention has advantages of environmental protection, clearness, economy, high efficiency, and good heat insulation property, sound insulation property and surface hydrophobicity.

The invention relates to a modified expansion-slowing particle profile controlling agent used for deep profile controlling and flooding of an oilfield and water plugging of an oil well, a preparation method thereof and application in the field of oil exploitation. The modified expansion-slowing particle profile controlling agent comprises the following components in parts by weight: 4-20 parts of a water-soluble monomer, 10-50 parts of an oil-soluble monomer, 0.01-1 part of a water-soluble cross-linking agent, 0.02-2 parts of an oil-soluble cross-linking agent, 1-10 parts of a surfactant, 0.05-0.5 part of a water-soluble initiating agent, 0.001-0.25 part of an oil-soluble initiating agent, 0.05-0.5 part of a coupling agent, 0-5 parts of alkaline and 30-70 parts of de-ionized water. The modified expansion-slowing particle profile controlling agent overcomes the disadvantages of the conventional expansion type particles that water-absorbing expansion speed is high, the particles after expanding are too hard, and the particles cannot be used for deep profile controlling of the oilfield; the particle profile controlling agent is applied to water plugging of the oil well and deep fluid diversion of the oilfield with a high water content, improves displacement effects of water flooding, polymer flooding and surfactant flooding, and increases recovery efficiency of oil accumulation.

The invention relates to a method for extracting refined tellurium from tellurium-contained smelting slag, which is characterized in that the method comprises the following steps of: oxidizing and leaching inorganic acid, replacing noble metal with a copper plate, depositing the copper by sodium sulfide, counteracting and depositing tellurium, alkaline leaching coarse TeO2, removing impurities by Na2S, concentrating and electrowinning. The method has the advantages of high recovery rate for tellurium, comprehensive and effective recovery of other useful metals, and suitably treating the tellurium-contained waste slag with high water content and small granularity generated in the metallurgy process by a wet-method.

The invention discloses a portable shallow soft soil original state sampling device and a sampling method. A solution is provided for solving the problems that soft soil with a high water content is likely to fall along the inner wall of a sampler, an original state soil column is easily disturbed in repairing, separating and post-treating processes, and the inner cavity of the sampler is difficult to clean and the like. The sampling device comprises the sampler, a positioner and a separator. Smooth sampling is realized through a sampling rod, a steering base, a force transfer base and a sampling barrel; a negative pressure is generated in the inner cavity of the force transfer base by virtue of a piston and a baffle plate, so that a soil sample is prevented from falling. By opening out a liner pipe and the separator, the soil column is repaired, separated and packaged. The method comprises the following steps: removing miscellaneous soil in the surface layer, assembling the sampling device, and pressing the sampler into a specific depth; then lifting up the sampling rod to close the inner cavity of the force transfer seat; and screwing the sampler out, detaching the sampling barrel, pushing the liner pipe out by using the separator and performing packaging with a cover. The device disclosed by the invention is simple in structure, convenient to operate, small in sampling disturbance and high in efficiency.

The present invention belongs to the field of food preserving technology, and is especially method of prolonging preservation period one steamed bread. Compound preserving modifier comprising starch hydrolase 1-7 wt%, hemicellulase 3-7 wt%, lipase 3-7 wt%, emulsifier 40-70 wt%, hydrophilic colloid 15-40 wt%, and coagulation inhibitor 2-6 wt%, is mixed into dough; the dough is pressed and formed into steamed bread blank; and the steamed bread blank is leavened with low temperature supersaturated steam to produce the steamed bread. The steamed bread has improved internal structure, softened core, high antiageing performance and high water content. Its internal cellular gluten structure can limit water escape and delay ageing. At the same time, composite biological mildew inhibitor is sprayed to the surface of steamed bread to inhibit flora growth effectively.

The present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices. More particularly, the present invention relates to novel siloxanyl random copolymers bearing polymerizable activated unsaturated end-groups and containing a hydrophilic, cationic substituent in the polymer chain which are capable of polymerization to form transparent polymeric compositions having high water contents; characteristics useful in the manufacture of ophthalmic devices. The polymeric compositions comprises polymerized polymerizable silicone bearing pendant cationic hydrophilic groups

The invention is a method for implementing high-water content well same-well injection production by multi-cup uniform-flux underground oil-water separator, characterized in: using multi-cup uniform-flux underground oil-water separator to make the produced liquid from the extracted bed automatically deposit when underground flowing through the separator, after the oil and water are separated from each other, using two lifters to lift and reinject through the respective independent flow channels and the two lifter are respectively called extraction pump and injection pump, the produced liquid with low water content is lifted by the extraction pump through the flow channel of the extraction pump up to the ground and the produced liquid with higher water content is reinjected by the injection pump through the flow channel of the injection pump into the injection bed. And it can perfectly complete underground separation of oil and water, implement economic and effective extraction for high-water content wells and implement water injection for other oil beds in the same well site at the same time.

The invention discloses a method for recycling dichloromethane in an acesulfame potassium synthesis process. The method comprises the steps of a, adding roughly distilled dichloromethane into a dehydrating tower, heating, condensing to enable steam of a mixed solution of dichloromethane and water to enter a dehydration overflow tank and dichloromethane containing qualified water at the bottom to enter a semi-finished product tank so as to be used by a rectifying tower; b, enabling dichloromethane containing unqualified water at the bottom of the overflow tank to enter the dehydrating tower again through backflow and dichloromethane with high water content at the top to enter a crude product tank, and regularly discharging layered water in the crude product tank; c, enabling dichloromethane containing qualified water in the semi-finished product tank to enter the rectifying tower, distilling to 45 DEG C, enabling dichloromethane steam to enter the dehydration overflow tank, and sucking dichloromethane with high impurity content at the bottom into a residual solution tank; and d, after detecting dichloromethane in the dehydration overflow tank to be qualified, placing dichloromethane into a finished product tank so as to be used for synthesizing and sulfonating, and enabling the unqualified dichloromethane to enter the rectifying tower so as to be rectified again.

The present invention relates to unit dose detergent compositions comprising a water-soluble container formed from a water-soluble film material enclosing a liquid composition with a relatively high water content. In one embodiment, the unit dose detergent composition comprises a water-soluble container formed from a water-soluble film material enclosing a liquid composition, wherein the liquid composition comprises (a) at least one surfactant, (b) at least one humectant selected from the group consisting of polyols having 3 to 9 carbon atoms, and (c) about 15 wt % to about 35 wt % of water.

The invention relates to a preparation method and application of environment-friendly urea resin for laminating plywoods from high water-content veneers. The method for synthesizing the resin is simple, and low in cost; the laminated plywoods can meet the national E1 grade and even E0 grade environmental protection requirements; and the problems of low prepressing performance and water resistance when the high water-content veneers are laminated into the plywoods are mainly solved. In the synthesis of the urea resin, an acid-base-acid-base process is adopted, formaldehyde and polyvinyl alcohol are added at one time, urea is added by three batches, melamine is added by two times, and after ammonia water is added, the ammonia water, the urea, the formaldehyde and urea-form condensate are reacted to generate a series of triazine ring compounds, and the microstructure of the resin is improved. When the resin is cured, the crosslinking density is improved, wet shear strength of the plywoods is obviously improved and the formaldehyde emission is obviously reduced.

The invention provides a novel sludge curing treatment agent. The curing treatment agent comprises a curing agent A and a curing conditioner B, wherein the curing agent A comprises the following components in percentage by weight: 40-60% of MgO, 5-20% of magnesium chloride salt, 10-20% of SiO2, 10-30% of CaO, 0.1-4% of dehydrating agent and 0-20% of fly ash; the curing conditioner B comprises the following components in percentage by weight: 20-40% of H3PO4, 30-50% of NH4H2PO4 and 20-40% of oxalic acid; the curing agent A accounts for 0.5-10% of the total amount of sludge in treatment by mass; and the curing conditioner B accounts for 0-5% of the total amount of sludge in treatment by mass. By adopting the sludge curing treatment agent provided by the invention to treat the sludge with relatively high water content and particularly water content over 80%, the sludge can be cured generally in 1-2 days, the curing time is short, and the water content is reduced to about 30% 7 days later; after the curing, the water content of the sludge is low; and the sludge after the curing treatment can be subjected to landfill on site or applied to roadbed, greening, earthing, ecological restoration and the like, thereby avoiding secondary pollution to environment.

The invention relates to curing agent used for curing and stabilizing dewatered sludge produced by a sewage plant. The invention is characterized in that curing material and assistant curing material bentonite are added by weight in the dewatered sludge, and each component is mixed evenly, and the weight percentage of each component is 30 to 80 percent of sludge, 15 to 30 percent of curing material, and 5 to 40 percent of bentonite. The curing material is formed by concrete, lime, fly ash and gypsum by weight. The invention has the advantages that the disposed sludge can be disposed by burying to be as fillings for the using of renewable recources. The curing agent can improve the high water content and the low intensity of the sewage, and has the advantages of increasing curing effect, reducing curing material use amount and reducing disposal cost. The compositions of the curing agent of concrete, fly ash, lime, gypsum and bentonite have wide distribution and low price with finished produces selling, thereby realizing the industrialization of sludge curing and stabilizing techniques.

The invention relates to a preprocessing technology for processing kitchen waste with high oil, high viscosity and high water content, comprising the following steps: (1) pouring mixed waste which mainly comprises kitchen waste into a kitchen waste receiver to realize initial solid-liquid separation in a transporting process; (2) when separated solid waste enters a bag-breaking and distributing machine, tearing and breaking bagged waste and waste in other bags; (3) transporting the bag-broken kitchen waste into a grid machine to sort, separating inorganic waste or solid and organic waste with larger grain diameters in waste, and transporting the organic waste into a full-automatic distribution bin; (4) continuously carrying out the solid-liquid separation of the waste in the full-automatic distribution bin, and completing a processing process by entering the solid waste into a lower container. The kitchen waste preprocessing technology further sorts the organic waste with even grain diameters in the kitchen waste, satisfies the following resource processing requirement of the kitchen waste and increases the resource conversion rate of the kitchen waste.

The patent of the invention relates to the field of reproduced tobacco product manufacturing technology, in particular to a method for manufacturing tobacco cut stems. The method comprises the following steps: the cut stems after being cut enter a continuous extraction device, and are extracted with solvent, wherein the proportion of materials to the solvent is 1:20, the time lasts 20-60 minutes, and the temperature of the solvent is 20-50 DEG C; an extraction mode is as follows: forward flow is conducted, the extracted cut stems are subjected to solid-liquid separation through extrusion and centrifugation, and then subjected to feed liquid backfill, wherein the feed liquid concentration is 30%-40%, the feed liquid temperature is 20-40 DEG C, the application proportion is 40-120%; and the backfill mode is as follows: the spraying is conducted. After being subjected to liquid feed backfill, the cut stems have higher water content which is about 65%, so that the water content of the cut stems after the water pretreatment is reduced to about 35% from 65%, and then the cut stems are subjected to tower type expansion or air flow drying. The cut stems prepared by the process has better color and luster and good filling value, the cigarette quality is improved obviously, the harmful contents such as tar and carbon monoxide in the cigarette are reduced greatly, the utilization ratio of stem raw materials is improved greatly, and the cost for a single box is lowered greatly.

The present invention provides a process for the production of a polyether involving establishing oxyalkylation conditions in an oxyalkylation reactor in the presence of from about 5 ppm to about 1,000 ppm, based on the final polyether weight, of a double metal cyanide (DMC) catalyst, continuously introducing into the reactor at least one alkylene oxide and a low molecular weight starter having a number average molecular weight of less than about 300 Daltons (Da) containing from about 200 ppm to about 5,000 ppm water and acidified with from about 10 ppm to about 2,000 ppm of at least one of an inorganic protic mineral acid and an organic acid, and recovering a polyether product having a number average molecular weight of from about 200 Da to about 4,000 Da, wherein the ppm (parts per million) of water and acid are based on the weight of the low molecular weight starter. The inventive process may allow for the use of low molecular weight starters containing higher levels of water at lower DMC catalyst levels than current processes.

The invention relates to a combined nitrification method for synthesizing nitrobenzene and a combined device of a micro-reactor and a stirring reactor. During the synthesis, benzene and mixed acid of nitric acid and sulfuric acid are taken as initial materials, are conveyed to two inlets of the micro-reactor through a metering pump respectively, are premixed in micro-channels, and perform partialnitration reaction at the same time; and a first-stage nitration product with high dispersion state is produced at an outlet of the micro-reactor. The first-stage nitration product continuously flowsinto a stirred tank nitration reactor to continue to react. The method and the device perform continuous operation under the condition of the mixed acid with high water content and have safe process,the conversion rate of the benzene is 99.85 percent (mol), and the selectivity of a product, namely the nitrobenzene is 99.8 percent (mol).

Monomers for polymers having high oxygen permeability, high water content and a low modulus of elasticity are provided, and polymers and ophthalmic lenses comprised of said monomers are provided. They are monomers represented by formula (1) or (2) below: X--O--(CH.sub.2CH.sub.2CH.sub.2O).sub.m--(CH.sub.2).sub.n--A (1) 1 wherein, X is a polymerizable group having carbon-carbon unsaturated bonds; A is a siloxanyl group; R is H or a methyl group; m is an integer of 1 to 10; m' is an integer of 2 to 10; and n is an integer of 2 to 10.

The invention discloses a silt solidification soil construction technology which comprises the steps of surface cleaning drainage, silt sampling, detection analysis, excavation stacking, stirring and mixing, filling and grinding and stabilized soil maintenance. Through solidification soil in-situ solidification, silt and a curing agent are stirred and mixed to form silt solidification soil, and the curing agent is prepared through expanded graphite, activated carbon, cement, quick lime, gypsum, lignocelluloses, coal ash, granulated blast-furnace slag powder, coal gangue, caustic dross, hydroxypropyl methyl celluloses, furfural residues, medical stone and smectite clay. By means of the silt solidification soil construction technology, original flowing high-water-content low-strength high-compressibility silt is converted into high-compressive-strength excellent-entire-board-performance, good-durability and environment-friendly solidification soil, and the requirement of shallow ground earthwork materials for roads, storage yards, ports, reclamation projects, afforesting and the like can be met.