252results about How to "Go green" patented technology

The invention discloses a solid-acid catalysis and supercritical extraction coupling preparation method of furfural and a device thereof, pertaining to the technical field of the preparation of biobased chemicals. The method adopts solid acid as a catalyst, such as superacid or molecular sieve, and uses supercritical CO2 (SCCO2) for on-line extraction and separation of products. In the whole preparation process of the furfural, raw material aqueous phase and supercritical fluid phase successively enter a tower for realizing the countercurrent contact multiple-extraction which is carried out in a catalysis filling extracting tower. In the whole process, the solid acid is easily separated from the product, can be recycled and has little corrosion to equipment. Discharge amount of the three wastes is small and operation is convenient and safe. Furthermore, the SCCO2 has low cost, no toxicity, good diffusivity performance and easily controllable solubility, and such a defect as mass transmission efficiency reduction in a heterogeneous catalytic reaction after the use of the solid acid can be overcome when the SCCO2 is used for on-line extraction of the furfural, so as to immediately remove coking precursors from a catalyst pore passage, thereby deferring the inactivation of the catalyst, realizing green and clean production technology and wide application prospect.

The invention relates to multi-strength regeneration brick aggregate fiber concrete and a preparing method thereof. The multi-strength regeneration brick aggregate fiber concrete is prepared from cement, fine aggregate, natural coarse aggregate, regeneration brick coarse aggregate, polyolefin fiber, steel fiber and water according to the weight ratio of 1: (0.780-1.309) : (0-1.830) : (0.390-1.568) : (0-0.019) : (0-0.161) : (0.33-0.48). The regeneration brick aggregate fiber concrete with the target strength grade of CF30-CF50 can be prepared by means of the raw materials, strength grade is high, and application range is wide. The obtained regeneration brick aggregate fiber concrete has high working performance including peaceability and water-retaining property, compressive strength and splitting-tension strength are high, the preparing process is simple and environmentally friendly, and construction is easy.

The invention belongs to the technical field of nonwoven fabrics, and discloses sandwich microcapsule composite antibacterial nonwoven fabric and a preparation method and application thereof. The sandwich microcapsule composite antibacterial nonwoven fabric comprises an intermediate layer and a first surface layer and a second surface layer which are arranged at the two sides of the intermediate layer. The composition of the intermediate layer is antibacterial microcapsules. The first surface layer and the second surface layer are nanofiber membranes prepared by electrostatic spinning. The microcapsules are prepared by using natural herbal antibacterial components, and the electrostatic spinning technology is adopted so that the disadvantages that the microcapsules are poor in stability, liable to lose and low in acting efficiency can be overcome. The prepared sandwich microcapsule composite antibacterial nonwoven fabric is green, environment-friendly and stable and has great antibacterial effect.

The invention relates to a fluorous synthesis method of betamethasone, belonging to the technical field of steride medicament synthesis methods in pharmaceutical chemistry. The method comprises the following process steps: fluorinating and refining betamethasone epoxide which is used as a raw material so as to obtain betamethasone. According to the invention, the fluorous synthesis method of betamethasone is reasonable in design, thus chemical reaction time is greatly reduced, production period is shortened, a whole technical level of a product is greatly improved, cost is reduced by 15% as compared with the conventional process, and the fluorous yield of betamethasone reaches 85-90%.

A soluble TiO2 nanocrystal is prepared from 3-valence Ti-contained inorganic salt, hydrogen peroxide and alkali solution through open reflux reaction or closed hydrothermal reaction at 60-220 deg.C for 1-24 hr. Its advantages are uniform granularity (5-40 nm), high solubility or dispersity in water, alcohol and ketone, high photocatalytic activity and good deodoring, antibacterial and antimildew performance.

The invention relates to a method and equipment for treating tripolycyanamide waste water by using ultrafiltration membranes and belongs to the field of waste water treatment. In the invention, waste water from tripolycyanamide production is treated by using the ultrafiltration membranes, an ultrafiltration system consists of three ultrafiltration membrane modules which are connected in series, each ultrafiltration membrane module has three sets of parallelly working ultrafiltration membrane equipment, ornithine aminotransferase (OAT) pulp enters the three ultrafiltration membrane modules in turn, and the ultrafiltration membranes divide the OAT pulp into concentrated OAT pulp, resident fluid and pure tripolycyanamide and penetrating fluid. The resident fluid enters a resident fluid tank from the third ultrafiltration membrane module and is subjected to high-temperature and high-pressure treatment; and the OAT and tripolycyanamide are decomposed into ammonia and carbon dioxide, which are recovered and reduced. The penetrating fluid is discharged from each set of ultrafiltration membrane equipment and recycled as process circulating water, and thus, the zero waste discharge of a tripolycyanamide device is realized. The production of waste slag in a tripolycyanamide production process is avoided, the process is environment-friendly, the process atom economy is high, limited resources are saved, and energy consumption and cost are reduced.

The invention discloses a full-spectrum solar hydrogen production-hydrogen storage integrated system which comprises a light-focusing part, a photo-electric conversion part, a photo-thermal conversionpart, a hydrogen production subsystem and a hydrogen storage subsystem, wherein the light-focusing part focuses and reflects incident full-spectrum solar to the photoelectric conversion part and thephoto-thermal conversion part; the photo-electric conversion part is used for converting waveband solar energy in band gap fit with the photoelectric conversion part into photo-electric energy; the photo-thermal conversion part is used for converting residual full-spectrum waveband solar energy into photo-thermal energy; in the hydrogen production subsystem, hydrogen is produced by utilizing photo-electric energy to electrolyze water; in the hydrogen storage subsystem, the hydrogen produced by the hydrogen production subsystem is utilized to react with a first reactant for an endothermic reaction of hydrogen absorption; a heat source of the endothermic reaction is the photo-thermal energy; the occurs between nitrogen is utilized to react with a second reactant for an exothermic reaction ofnitrogen absorption; and a reactant-product relationship exists between the first reactant and the second reactant. The integration of full-spectrum hydrogen production and hydrogen storage is realized.

The invention discloses a traditional Chinese medicine composite for treating gstrointestinal dysfunction and a preparation method thereof. The traditional Chinese medicine composite is characterized in that the composite is composed of the following components in parts by weight: 1-6 parts of rhizoma atractylodis macrocephalae extract, 1-4 parts of radix paeoniae alba extract, 1-3 parts of pericarpium citri reticulatae extract and 1-3 parts of divaricate saposhnikovia extract, wherein the extracts are coarse powder obtained by smashing the traditional Chinese medicine and are extracted with a carbon dioxide supercritical extraction method. The traditional Chinese medicine composite disclosed by the invention fully extracts effective ingredients, and the pharmacological effect is superiorto the single-component extract, is superior to a full-formula carbon dioxide supercritical extract, and is superior to the composite of volatile oil ingredients and water extract ingredients appliedin the prior art, or the composite of volatile oil ingredients and ethanol extract ingredients.

The invention discloses a preparation method of environment-friendly high-stripping polyurethane / foam compositetype football leather. The preparation method comprises the following steps: firstly scrape coating a piece of releasetype paper with waterborne polyurethane surface layer slurry, drying, and obtaining a polyurethane synthetic leather surface layer; then scrapeblade coating the surface layer with closed aliphatic polyurethane intermediate layer slurry, drying, and obtaining a polyurethane synthetic leather intermediate layer; and pouring smearing solvent-free two-component polyurethane adhesive layer resin onto the surface of the intermediate layer, drying until a semi-dry state, laminating a foam elastic basic material, then continuing the reaction, finally stripping the synthetic leather and the release type paper, and obtaining the football leather. When the football leather is produced and processed, the football leather can be formed in one step, a leather sample does notneed to be cured with the release type paper, and the production efficiency is high; and a stripping strength of the football leather product is high (greater than or equal to 12N / 3cm, 150mm / min), the pattern shape is good, and the beating resistance is excellent (greater than 6000 times, GB / T 22892-2008).