34results about How to "Achieve hydrolysis" patented technology

The invention relates to modified PET (Polyethylene terephthalate) polyester as well as a preparation method and application thereof, and belongs to the field of modified polyester. The modified PET polyester comprises aerogel particles and polyethylene terephthalate; the aerogel particles are dispersed between the molecular chains of the polyethylene terephthalate uniformly; the particle size of the aerogel particles is 2 to 3 microns; the content of the aerogel particles in the modified PET polyester is 1 to 10 percent by weight. Modified PET is prepared by the steps of adding the aerogel powder into glycol, putting into a grinding machine, grinding to prepare mixed slurry, mixing the mixed slurry and terephthalic acid, and performing esterification reaction and polymerization reaction. Modified PET fiber is prepared by slicing the modified PET, metering, spinning, cooling, applying oil, stretching, performing heat setting and performing winding formation. The aerogel particles are introduced before polymerization of the PET polyester, so the prepared PET has high spinnability, can produce modified PET fibers with various thickness, has wide application range and can meet the production requirement of various fabrics.

The invention relates to a method for preparing chemically crosslinked photonic crystal hydrogel with an adjustable color. The method comprises the following steps: (1) dissolving N-isopropylacrylamide, N-hydroxyethyl acrylamide, a cross-linking agent and an emulsifier into deionized water, stirring, warming and keeping warm under the condition at 20-25 DEG C in a nitrogen condition, and then adding an initiator to continue to react for 1-4 hours, and dialyzing, so as to obtain a colloidal crystal hydrogel solution; (2) concentrating the obtained colloidal crystal hydrogel solution, standing at room temperature, adjusting the pH by adopting an NaOH solution, adding a crosslinking agent, evenly mixing, centrifuging, and standing at room temperature after taking, so as to obtain the chemically crosslinked photonic crystal hydrogel. The method is simple in process and low in cost, and the prepared photonic crystal hydrogel has thermosensibility. In addition, the obtained photonic crystal hydrogel is good in stability, and free of hydrolysis, the problem that nano hydrogel is easily decomposed because of ester hydrolysis in 2-hydroxy ethyl acrylate is solved, and the defects of the photonic crystal hydrogel in application are compensated.

The invention relates to aerogel modified heat-resistant and flame-retardant low-thermal-conductivity rigid polyurethane foamed plastic and a preparation method thereof. An aerogel composite heat-resistant flame retardant is dispersed into a polyurethane body and is modified to form a polyurethane foamed material, wherein the composite heat-resistant flame retardant is formed by modifying aerogelpowder with a phosphate heat-resistant flame retardant. According to the preparation method, the composite heat-resistant flame retardant of modified aerogel is added into polyurethane foaming plastic(RPUF); the composite heat-resistant flame retardant is uniformly dispersed into an RPUF body; heating, curing and ripening are performed to obtain the heat-resistant and flame-retardant low-thermal-conductivity rigid polyurethane foamed plastic. The modified RPUF provided by the aerogel modified heat-resistant and flame-retardant low thermal conductivity rigid polyurethane foam plastic disclosedby the invention has the characteristics that the heat resistance reaches up to 153 DEG C, the thermal conductivity is lower than 0.027W/m.K, a limiting oxygen index is greater than or equal to 32 percent, and the compressive strength is 0.39 to 0.40MPa.

The invention relates to a PET (polyethylene terephthalate) polyester slice with an air purifying function as well as a preparation method and application of the PET polyester slice. The PET polyester slice is prepared from PET polyester, wherein the PET polyester is prepared from aerogel particles and polyethylene terephthalate; the aerogel particles are composite silicon aerogel particles of nanometer titanium oxide and a rare-earth solid solution. The PET polyester slice is bi-directionally stretched to prepare a PET thin film. As a nanoscale titanium dioxide photocatalyst exists in the composite silicon aerogel particles of the nanometer titanium oxide and the rare-earth solid solution in the thin film, the silicon aerogel is used for adsorbing pollutants, such as formaldehyde, and the nanometer TiO2 is used for photolyzing the pollutants, such as the formaldehyde, deposition is preformed while adsorption is performed, a long-term decomposition effect is achieved, and the polyester thin film has the performance of automatically depositing the pollutants in air. When the polyester thin film provided by the invention is paved on vehicle window glass, the air in a vehicle can be effectively purified; when the polyester thin film provided by the invention is paved on window glass or a furniture surface in a building, indoor air can be effectively purified.

The invention discloses a method for hydrolyzing vegetable fibre by solid acid, comprising the following steps: (1) adding smashed vegetable fibre and a solid-acid catalyst into water, mixing and dissolving; (2) carrying out hydro-thermal reaction at the temperature of 140-180DEG C for 6-10 hours after the smashed vegetable fibre and the solid-acid catalyst are evenly mixed and dissolved, and obtaining hydrolysate after the reaction; and (3) filtering the hydrolysate so as to separate target objects and the solid-acid catalyst, drying filter residues so as to be directly reused, and regulating the pH value of filter liquor to be within 6-8. The invention adopts solid sulfoacid with better hydrothermal stability and larger acid value to replace liquid acid, realizes the hydrolyzation of the cellulose under the moderate condition and solves the problem that the tradition catalyst is difficult to be separated from products; and after separation, the catalyst can be recycled, thereby avoiding lower economic benefit and acid contamination caused by the loss of liquid-acid catalysts.

The invention belongs to the technical field of medicine, and provides a preparation method of brain protein hydrolysate. The preparation method comprises steps of raw material treatment, papain hydrolysis, composite enzyme hydrolysis, pH adjustment, sterilization, and nano filtration. The preparation method is simple and can be easily applied to industrial production. The prepared brain protein powder has the advantages of high peptide content and high vitality.

The invention relates to a method for increasing reducing sugar yield by coupling of membrane separation and lignocellulose acid hydrolysis. The method is characterized in that hydrolytic reaction and the membrane separation are coupled to realize timely separation of hydrolysate and avoid continuous degradation of the hydrolysate, so that the reducing sugar yield is increased, fermentation inhibitors are prevented from being generated effectively, and subsequent fermentation is facilitated. According to the method, ordinary filtration, micro filtration and ultrafiltration are combined for use organically, the pollution of the hydrolysate to an ultrafiltration membrane is reduced effectively; and as various filter membrane retention substances return to a reaction kettle for continuous hydrolysis, the substrate conversion efficiency and the purity of the hydrolysate are improved, and the reducing sugar yield is increased.

This invention relates to a power generating apparatus including two systems. In one of the systems, a hydrogen gas is generated by hydrolysis, and a hydrogen demanding unit generates electric power. In the other system, electric power is generated based on an oxidation-reduction chemical reaction of an electrode and ions. The power generating apparatus includes a hydrogen release unit with a hydrogen generating container within which a functional material has been mounted. Alternatively, a construction may be adopted in which the functional material is mounted on negative and positive electrodes and a battery element including the negative and positive electrodes and an electrolyte is provided within the container. The power generating apparatus further includes a hydrogen generating unit including a liquid container which generates a hydrogen gas both by hydrolysis, in which the functional material is reacted with water or an aqueous solution (an electrolysis solution), and by binding of hydrogen atoms which settle among crystals due to a quality change of the functional material by the hydrolysis, a first electrogenic unit in which the battery element in the hydrogen generating container generates electricity, a second electrogenic unit in which the hydrogen demanding unit generates electricity by a hydrogen gas produced in the hydrogen generating container, a control unit which applies electric power generated by the first electrogenic unit to a load device and, based on the load current amount, controls the amount of the hydrogen gas generated by the hydrogen generating unit.

The invention provides a method for preparing xylooligosaccharide by combining lactic acid with xylanase hydrolysis, and belongs to the technical field of biomass degradation and conversion. The method comprises the following steps: mixing forestry and agricultural residues with a lactic acid solution with the volume concentration of 0-10%, carrying out a catalytic reaction, filtering to obtain a treatment solution containing xylooligosaccharide and filter residues, mixing the filter residues with a xylanase solution, and carrying out enzymolysis to obtain an enzymatic hydrolysate containing xylooligosaccharide. According to the method disclosed by the invention, a dilute acid is combined with an enzyme hydrolysis method, so that xylan in treating fluid and solid residues after catalysis of agricultural and forestry wastes can be fully degraded into xylooligosaccharide, and the yield of xylooligosaccharide can reach 70%.

The invention belongs to the technical field of medicinal oil refining, and discloses a method for accurately controlling the content of stearic acid in soybean oil by using a mixed filler. The methodcomprises the following steps: A. physically and uniformly mixing lipase, inorganic base, a filter aid and an adsorbent to form a mixed filler, the lipase being Sn-1, 3-site specific lipase; B, enabling soybean oil to flow through the mixed filler to obtain refined soybean oil. The method solves the problems that the stearic acid content cannot be accurately controlled and the requirement for preparing a high-quality fat emulsion preparation cannot be met in the traditional soybean oil production process.

The invention is applicable to the technical field of lignocellulose resource conversion and utilization and biorefinery, and provides a method for preparing microbial oil by utilizing straw resources, which comprises the following steps: continuously feed-batch supplementing materials to carry out high-solid-phase enzyme hydrolysis on pretreated straws, so that the sugar concentration of the final hydrolysate reaches more than 300g/L; through two times of quantitative water washing, directional preparation of medium-concentration and low-concentration sugar solutions is achieved, the requirement for the performance of filtering or centrifuging equipment in the technological process is lowered, the high-concentration sugar solution, the medium-concentration sugar solution and the low-concentration sugar solution are matched with fed-batch fermentation, and efficient combined utilization is achieved in fed-batch grease fermentation. Besides, soluble oligosaccharides accounting for about 10-20% of the total sugar mass can be generated through high solid phase enzyme hydrolysis, and the oligosaccharides can serve as a strong inducer to induce enzyme-producing fungi to produce a large amount of cellulase for high solid-to-liquid ratio enzyme hydrolysis, so that self-production and self-use of the cellulase are realized, and the enzyme cost is remarkably reduced.

The invention belongs to a plugging agent for temporary plugging in oil and gas well repairing. The plugging agent comprising the following raw materials in parts by mass: 20 to 40 parts of a polymeric monomer, 5 to 10 parts of a biopolymer, 0.1 to 1.0 part of a cross-linking agent, 50 to 70 parts of a reinforcing agent, 0.01 to 0.05 part of a gel breaker and 0.001 to 0.003 part of an initiator, wherein the polymeric monomer is selected from a mixture of acrylamide and methacrylamide; the biopolymer is one selected from xanthan gum and guar gum; the cross-linking agent is selected from ethylene glycol dimethacrylate; the reinforcing agent is one or a mixture of more than one selected from potassium chloride, sodium chloride, sodium nitrate and potassium nitrate; the gel breaker is a mixture of benzoyl peroxide and ferrous sulfate, and a molar ratio of benzoyl peroxide to ferrous sulfate is (1-2): 1; and the initiator is 1-((cyano-1-methylethyl)azo)formamide. The plugging agent has the advantages that pressure-bearing strength is good, self-degradation release can be realized, and damage to a stratum is small.

The invention discloses an ionic liquid-complex microbial inoculum system which comprises ionic liquid and a complex microbial inoculum. The ionic liquid and the complex microbial inoculum form a coupling system for enzymolysis of lignocellulose; the ionic liquid contains 1-ethyl-3-methylimidazole ferric chloride salt; and the complex microbial inoculum comprises fermentation liquor of wet cellulomonas, streptomyces albus, candida tropicalis and white rot fungi. In an enzymolysis test, the highest cellulase activity of enzymatic hydrolysate is 185.1 U.mL<1>, the degradation weight loss rate ofgarden biomass reaches 52.6% and is respectively increased by 59.0% and 66.5% with respect to that of a only complex microbial inoculum, and lignin content of enzymolysis residues is reduced by 35.2%. In the enzymolysis application, the enzymolysis period of the garden biomass is 18 to 26 days, the high-temperature period lasts for 12 to 21 days, the highest temperature reaches 62 to 72 DEG C, the final degradation weight loss rate is 47.2 to 54.2%, and the lignin content is reduced to 8.5 to 10.6%. The ionic liquid-complex microbial inoculum system is simple and convenient in preparation process and outstanding in enzymolysis efficiency, and can meet the social requirements of intensive and resource treatment and utilization of agriculture and forestry biomass and the development conceptof green circulation.

The invention belongs to the technical field of feed additives, and particularly relates to an alpha-galactosidase soft capsule feed additive and a preparing method thereof. The method includes the following steps that alpha-Gal and beta-CD are added into a phosphate buffered solution, and the mixed solution is homogenized and stands for a reaction to a reaction endpoint to obtain alpha-Gal-beta-CD additive solution; 2, B-type gelatin is added into water, and glycerinum, preservative and titanium dioxide are added after the B-type gelatin is swelled fully and are mixed uniformly to conduct colloidizing to obtain glue stock; 3, filling is conducted. The inhibition action of cyclodextrin inhibitor to alpha-Gal is used, so that alpha-Gal enzyme activity in animal feed is reduced and then improved, and alpha-Gal in the feed is more suitable for having the catalysis effect in the digestion period.

The invention belongs to the related technical field of crack repair, and discloses a high-tolerance environment-friendly microbial modifier and a preparation method and application thereof, and the method comprises the following steps: carrying out centrifugal treatment on a bacterial suspension obtained after enrichment culture of bacillus pasteurii or a last-generation bacterial liquid to obtain a bacterial precipitate and a bacterial supernatant; sequentially carrying out cell disruption treatment and centrifugal treatment on part of the bacterial precipitate to obtain cell disruption liquid; mixing the bacterial supernate, the other part of bacterial precipitate and the cell breaking liquid to obtain a bacterial enzyme mixture; inoculating the bacterial enzyme mixture into the liquid culture medium, and culturing to obtain bacterial liquid; mixing the bacterial liquid with first-concentration urea to obtain a reagent A liquid; and mixing the calcium source solution with the second-concentration urea to obtain a reagent B solution. The method can be applied to restoration of engineering bodies with severe microbial growth environments such as saline-alkali soil, the crack restoration effect is remarkably improved, and the method has a good application prospect.