712 results about "Glyoxal" patented technology

The invention is a fibrin glue that avoids the use of fibrinogen and thus eliminates the need for premixing and premature clot formation. The fibrin glue of the invention comprises thrombin, thromboplastin and calcium and may have clotting Factors, VII, IX and X, and the like. The invention also comprises a biosealant for use with the fibrin glue without fibrinogen or for use alone. The biosealant is a two component mixture of gelatin/resorcinol and glyoxal/glutaraldehyde/4-(p-maleimidophenyl) butyric acid. The two components are mixed on use.

A method for making a storage-stable glyoxalated polyacrylamide composition suitable for use as a strengthening agent for paper in which the glyoxal is added to the base polyacrylamide polymer in two portions and a scavenger for aldehyde groups is used.

The invention discloses a preparation method of water-soluble chitosan/polyvinyl alcohol composite films capable of being used as biological package materials. Water-soluble chitosan and polyvinyl alcohol are respectively dissolved in deionized water, the solution is subjected to mixing casting for forming films, then, the films are soaked into one kind of solution or several kinds of mixed solution from glutaraldehyde solution, borax solution, epichlorohydrin, glyoxal and sodium tripolyphosphate to be subjected to crosslinking for 40 to 60 minutes, peeling and natural drying or baking are carried out, and the water-soluble chitosan/polyvinyl alcohol composite films are obtained. The composite films have good antibacterial activity, biocompatibility and biodegradability, in addition, special gas blocking performance and excellent mechanical performance are realized, and the composite films have the advantages of chitosan and the polyvinyl alcohol. In addition, the production cost is low, the preparation process is simple, the production efficiency is high, and the environment is friendly.

The invention provides a metal surface oil and rust removal agent, and belongs to the technical field of cleaning agents. The metal surface oil and rust removal agent comprises the following components by weight: 2 to 4 parts of hydrochloric acid, 5 to 10 parts of phosphoric acid, 3 to 6 parts of oxalic acid, 3 to 5 parts of glacial acetic acid, 2 to 4 parts of citric acid, 3 to 4 parts of polyvinyl alcohol, 1 to 2 parts of hexamethylene tetramine, 2 to 3 parts of ethylene oxide, 1 to 2 parts of glyoxal, 2 to 3 parts of magnesium stearate, 2 to 4 parts of glycerol, 2 to 4 parts of thiourea, 2 to 4 parts of ammonium molybdate, 1 to 2 parts of polyaspartic acid, 2 to 4 parts of EDTA-Na2, 1 to 2 parts of ethylene diamine tetra sodium, 1 to 3 parts of poly maleic acid sodium, 2 to 3 parts of HEDPA, 2 to 6 parts of surface active agent and 70 to 100 parts of water. The metal surface oil and rust removal agent is convenient to use, and removes light rust for about 2 minutes and heavy rust for 6 to 7 minutes, and the oil removal rate can reach more than 97%.

A tampon pledget includes crosslinked cellulose fibers having microstructures treated to provide improved absorbency and higher wet strength. The fibers are treated with a crosslinking agent to provide at least one of a molecular weight between crosslinks of from about 10 to 200 and a degree of crystallinity of from about 25% to 75%. The crosslinking agent includes citric acid in 1% by weight. The crosslinking agent may further include sodium hypophosphite in 1% by weight. In another embodiment, the crosslinking agent may be a difunctional agent including a glyoxal or a glyoxal-derived resin. In still another embodiment, the crosslinking agent is a multifunctional agent including a cyclic urea, glyoxal, polyol condensate. The crosslinking agent is added in an amount from about 0.001% to 20% by weight based on a total weight of cellulose fibers to be treated and, preferably, in an amount of about 5% by weight.

A process for making a stiffened and rigid paper includes preparing a pulp slurry consisting essentially of water, a cellulosic pulp, a crosslinker, and a starch, and optionally a binder; draining the liquid from the pulp slurry to form a web; and drying the web. Alternatively, a process for making a stiffened and rigid paper includes the step of adding at least one crosslinker at one or more locations, such as at the wet-end, dry-end, or at both ends of the papermaking process. Suitable crosslinkers include a glyoxal-containing crosslinker, a gluteraldehyde, a polyfunctional aziridine, a zirconium-containing crosslinker, a titanium-containing crosslinker, and an epichlorohydrin, and mixtures thereof. When a binder is employed, it can be added either in the dry or wet form. Provided is a neutral or alkaline process to produce a paper product having the improved mechanical properties of a laminated product in the Z-direction, without a lamination step.

The invention provides a method for preparing 5, 5'-bistetrazole-1, 1'-dioxo hydroxyl ammonium salt (TKX-50), and belongs to the technical field of organic synthesis. The method comprises the steps as follows: step one, glyoxime is prepared, and the yield is 62%; step two, a product obtained in the step one is dissolved in water and concentrated hydrochloric acid, chlorine is introduced at the temperature of 0 DEG C for a reaction for a period of time, and dichloroglyoxime is obtained; and finally, a product obtained in the step two is dissolved in a solvent, and the product and sodium azide have a reaction at the temperature of 0 DEG C for a period of time; after that, the mixture is transferred into diethy ether, and sealed for a reaction at the room temperature overnight after HCl is introduced for a period of time; and after diethyl ether and most HCl gas are volatilized, pH of an aqueous NaOH solution is regulated to be about 8, reflux cooling is performed, filtered and separated solids are dissolved in hydroxylamine hydrochloride to have a reaction for a period of time, and TKX-50 is obtained. According to the method, glyoxal is adopted as a raw material, water is adopted as a solvent for preparation of dichloroglyoxime in the step two, and only direct filtration is required in postprocessing, so that the tedious purification process is prevented, and the cost is reduced; and besides, a target product TKX-50 is synthetized through three steps of reactions, the total yield is up to 34%, the reaction condition is mild, the operation is simple and convenient, and the industrialization is easy to realize.

The invention discloses silicon solar cell front face electrode silver paste. The silicon solar cell front face electrode silver paste comprises, by mass, 75-80 percent of silver powder, 3-10 percent of lead-free glass powder, 10-15 percent of organic vehicle and 0.5-3 percent of additive. The silver powder is the spherical micro silver powder with nano bismuth serving as the core, the silver content is 99.1-99.7 percent, the bismuth content is 0.3-0.9 percent, the particle size is 1-2 microns, the tap density is 4.5-5.0 g/ml, the specific surface area is 0.4-1.0 m<2>/g, and the silver powder is prepared by conducting liquid-phase chemical reduction on bismuth nitrate and silver nitrate through glyoxal or acetaldehyde. Bismuth-silicon-antimony-molybdenum lead-free glass powder serves as an adhesive, and potassium fluotitanate, potassium fluoroaluminate, magnesium fluoride and the like are added to serve as the silicon nitride antireflective film eroding additive. According to the silicon solar cell front face electrode silver paste, the contact resistance between a silver electrode and a silicon wafer can be reduced, the stripping strength of the electrode is improved, the electrical property of a solar cell is improved, the production cost of the conductive silver paste is reduced, and the requirement for nonexistence of lead and environmental friendliness are met.

A treatment method and a treatment system of tail gas from glyoxylic acid production by nitric acid oxidation of glyoxal belong to the fields of environmental protection, energy saving and consumption reduction. The method comprises the following steps: introducing air to oxidize NO in tail gas generated by nitric acid oxidation of glyoxal into NO2; performing six-grade water absorption continuously to absorb gas of NOx and HCl in the tail gas; absorbing the tail gas after six-grade water absorption by a NaOH or Na2CO3 solution to remove residual NO2 and HCl gas and to generate an alkaline solution containing NaNO3, NaNO2, and trace NaCl; discharging the treated tail gas by an induced draft fan; performing neutralization, concentration, crystallization, centrifugation and separation of the generated alkaline solution to obtain a mixed sodium salt containing NaNO3, NaNO2, and trace NaCl, returning the mixed sodium salt to an oxidation vessel to be used as a catalyst for recycle. The treatment system comprises: an oxidation reaction vessel, water absorbing towers from grade one to grade six, a seventh grade alkaline solution absorbing tower, a concentration and crystallization vessel, a centrifuge, and a induced draft fan.

An effective hydrogen sulfide scavenger that produces little corrosion may be prepared by reacting glyoxal with a compound having at least two primary or secondary amine groups. The subject hydrogen sulfide scavengers may be used with both the production of crude oil and natural gas, and the refining of same.

The present invention relates to hydrogen sulfide scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide, which is capable of scavenging or removing hydrogen sulfide in hydrocarbons or hydrocarbon streams without causing any problem. The present invention is also relates to a method of scavenging hydrogen sulfide employing present scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide. The present invention is also relates to a method of using hydrogen sulfide scavenging additive composition comprising glyoxal and a polymer compound which is polymer made from propylene oxide.

A method for reducing the amount of hydrogen sulfide present in refined hydrocarbon streams and reducing the amount of corrosion in processing equipment contacting the refined hydrocarbon stream. The method includes adding a corrosion inhibitor to the refined hydrocarbon stream in contact with the processing equipment to protect the processing equipment and adding glyoxal to the refined hydrocarbon stream in contact with the protected processing equipment. The corrosion inhibitor includes an organic soluble compound having a nitrogen-containing ring.

The invention relates to a bamboo weaving softening agent and a preparation method thereof. The preparation method comprises the following steps: putting glycerol, alcohol ether glucoside, polyethenoxy ether and a surfactant into a stirring tank, stirring for 30 minutes at 80 DEG C, adding glyoxal, formaldehyde and ammonium persulfate, simultaneously adding talcum powder, limestone flour and calcium carbonate, quickly stirring at 130 DEG C for 3 minutes, finally adding stearyl alcohol, stearic acid, ethyl carbamate and paraffin, stirring for 1 hour, and cooling to normal temperature. The softening agent prepared by the method has the advantages of favorable softening effect, no corrosion and better effects, enhances the strength and toughness of the softened part, and is convenient for popularization and use.

The invention discloses an antibacterial wash-and-wear fire-retardant finishing liquid which is prepared from the following raw materials in parts by weight: 10-15 parts of glyoxal, 10-15 parts of citric acid, 5-8 parts of cyclic phosphate, 5-8 parts of a licorice extract, 3-5 parts of chitosan, 2-3 parts of magnesium chloride, 2-3 parts of sodium hypophosphite, 1-2 parts of a penetrant, 1-2 parts of a coupling agent, 1-2 parts of a softener, 1-2 parts of ethylene glycol, 1-2 parts of a fiber protecting agent, 1-2 parts of a pH adjusting agent and 1-2 parts of a dispersant. The prepared multifunctional antibacterial finishing liquid is environment-friendly and free of pollution, has good efficacies of being wash-and-wear, shrink-proof, antibacterial and flame-retardant, and can meet the requirements of people on various functional aspects of textiles.

The invention provides a resin finishing agent composition for purified cotton clothes and a preparing method thereof. The resin finishing agent composition is a multi-ingredient resin finishing agent prepared by using etherified modified glyoxal resin, vinol, a polyethylene softener, an organic siloxane softener, MgCl2.6H2O, water and the like as main parts. The resin finishing agent composition is used in three-dimensional cat whisker crumpling finishing of pure cotton clothes. Compared with the conventional resin finishing agent, the resin finishing agent composition of the invention simplifies production technology and reduces operation and technology difficulties; and after finishing, fabrics have strength retention of 65-75%, a wrinkle recover angle (WRA/degree) is greater than 254 degrees, and the cat whisker three-dimensional retention effect reaches four to five level.

The invention discloses a preparation method and an application of GSH (glutathione) water-soluble fluorescent probe based on rhodamine. A structural formula of the fluorescent probe is represented in the specification. The invention provides a water-soluble fluorescent probe for detecting GSH with high selectivity on the basis of rhodamine derivatives. 1,2,4-trimellitic anhydride, 3-diethylaminophenol, hydrazine hydrate and glyoxal are taken as raw materials to synthesize the fluorescent probe. On one hand, the rhodamine structure is modified with carboxyl, and water solubility of the probe can be greatly improved; on the other hand, a hydrolysis-addition reaction is performed between SH of an analyte and aldehyde groups of the probe, and GSH, Cys and Hcy are distinguished. The fluorescent probe is the first one capable of efficiently distinguishing GSH, Cys and Hcy in a 100% aqueous solution on the basis of the rhodamine derivatives. The probe shows quite high sensitivity and good selectivity on GSH, and can be applied to cell imaging and detect intracellular GSH.

The invention relates to a preparation method of N-alkyl imidazole, solves the problems of high moisture evaporation capacity and high energy consumption of the prior art and is characterized in that alkyl residue, ammonia, formaldehyde and glyoxal are taken as raw materials to synthetize the N-alkyl imidazole. Namely mixed solution of glyoxal and formaldehyde is added into a kettle; ammonia is led in under the condition that temperature and pressure are controlled while alkylamine solution is dropwise added; after charging, the temperature and pressure are continuously controlled and reaction is carried out for six hours; after the reaction is completed, water is boiled off under the condition that pressure is reduced (4000Pa), and fraction at certain temperature is collected. The invention adopts ammonia instead of ammonia water or ammoniacal brine solution in reaction, so that water to be boiled off is reduced and production cost of alkyl imidazole is greatly reduced.

The present invention relates to water-dispersible core-shell microcapsules essentially free of formaldehyde. In particular it concerns core-shell microcapsules having a shell obtained by reacting polyisocyanates or polyoxirans cross-linkers and oligomeric compositions which are the reaction products between a polyamine component and a particular mixture of glyoxal and a C_4-6 2,2-dialkoxy-ethanal. The present invention comprises also the invention's core-shell microcapsules as part of a perfuming composition or of a perfuming consumer product.

The invention discloses a method for preparing ethyl glycolate. The method comprises the following steps of: refluxing HZSM-5 molecular sieves serving as a raw material in solution of NH4NO3, placing solid phase materials obtained by filtering in an electric resistance furnace for activation to obtain an activating catalyst; performing esterification reaction of aqueous solution of glyoxal serving as a raw material and a C4 to C8 unit alcohol in the presence of the activating catalyst in an atmosphere of nitrogen gas; and collecting a target product of ethyl glycolate from the reaction products. For the obtained ethyl glycolate, the yield is over 75 percent and the purity is over 98 percent. Compared with the prior art, the method uses the glyoxal to replace the glycolic acid as the raw material, thereby greatly lowering material cost, eliminating the self polymerization reaction which is difficultly avoided in the process of the glycolic acid and improving the yield of the target products; and the products obtained by the method is stable in quality, and the method is suitable for industrialized production.