185results about How to "High biodegradation rate" patented technology

Thermoplastic polyurethanes having an alternating sequence of hard and soft segments in which a nanostructured polyhedral oligosilsesquioxane diol is used as a chain extender to form a crystalline hard segment constituting SMPs. The polyurethanes are formed by reacting a polyol, a chain extender dihydroxyl-terminated polyhedral oligosilsesquioxane and a diisocyanate. The polyurethanes have multiple applications including for example, implants for human health care, drug delivery matrices, superabsorbant hydrogels, coatings, adhesives, temperature and moisture sensors, etc.

An object of the present invention is to provide a fiber-reinforced resin composition suitable for producing molded articles for products such as electrical and electronic equipment. The object has been achieved by a biodegradable resin composition containing a kenaf fiber, which contains a kenaf fiber in an amount of 10 to 50% by mass. In this case, the biodegradable resin is preferably a crystalline thermoplastic resin, particularly polylactic acid. The average fiber length (number average fiber length of the fibers excluding fragments) of the kenaf fiber is preferably 100 μm to 20 mm, and the kenaf fiber preferably contains a kenaf fiber having a fiber length of 300 μm to 20 mm. As the kenaf fiber, a fiber prepared from bast of kenaf is preferred.

The present invention relates to a method for degrading a plastic containing non-biodegradable polymers comprising submitting said plastic to at least one enzyme for modifying a polymer of said plastic which has a methane potential less than 5 Nm3/t+/−20%, wherein at least one product resulting from the modification exhibits a methane potential greater than 10 Nm3/t+/−20%.

The present invention relates to tough and ductile biodegradable, aliphatic polyester blend compositions and methods for preparing such compositions. It relates to products made out of such blend compositions, including, but not limited to, films, fibers, nonwovens, sheets, coatings, binders, foams and molded products for packaging. The products exhibit a desirable combination of high strength, ductility and toughness, while maintaining flexibility, biodegradability and compostability. The products are useful for a variety of biodegradable articles, such as diaper topsheets, diaper backsheets, disposable wipes, shopping and lawn/leaf bags, agricultural films, disposable garments, medical disposables, paper coatings, biodegradable packaging, binders for cellulose fibers or synthetics, and the like.

Methods of retarding the setting of a cement composition comprise including one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) in the cement composition. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

The invention discloses an environment-friendly optical glass cleaning agent and a preparation method thereof. The environment-friendly optical glass cleaning agent is prepared from the following raw materials in percentage by mass: 2 to 6 percent of inorganic alkali, 0.5 to 0.8 percent of anionic surfactant, 0.2 to 0.4 percent of non-ionic surfactant, 15 to 35 percent of film-forming agent, 0.4 to 1.0 percent of corrosion inhibitor, 0.5 to 1 percent of chelating agent and the balance of deionized water, wherein the anionic surfactant is prepared from sodium lauryl sulfate and fatty acid methyl ester sulfonate in a mass ratio of (5:1) to (1:1); the non-ionic surfactant is prepared from dodecyl glycoside; the film-forming agent is prepared from ethanol and ethylene glycol in a mass ratio of 1:1; the corrosion inhibitor is prepared from sodium citrate and triethanolamine in a mass ratio of 1:1. The optical glass cleaning agent disclosed by the invention has the advantages of good cleaning effect, high cleanliness of cleaned glass, no corrosion to the glass, high biodegradability, freeness from pollution, and low skin irritation.

Cement compositions may comprise one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) for retarding the setting of such compositions. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

The invention discloses a sewage treatment system and method for a natural gas purifying factory in H2S-containing gas field. By adopting a biological treatment process comprising pre-aeration, air floatation, hydrolytic acidification, anaerobic treatment, aerobic treatment, and precipitation, the quality of the treated water meets the primary standard of supreme permissible effluent concentration of the second category of hazardous in national integrated wastewater discharge standard. According to the invention, innovation is created based on anaerobism-aerobism of conventional purifying factory biochemical sewage treatment processes, and a sewage pretreatment step realized by hydrolytic acidification is added, thus water quality and quantity are effectively adjusted, the biodegradability of the sewage is greatly raised, and favorable conditions are created for posttreatment of the sewage; in the stage of subsequent treatment, the anaerobic-aerobic segment is changed into an aerobic-anaerobic segment, the sewage retention time is greatly reduced, the volume of treatment building is correspondingly reduced, thus the engineering investment is saved, and the workload of maintenance management is reduced.

The invention provides lipophilic slow release fertilizer used for modifying environmental creatures in oil pollution positions and a preparation method for the fertilizer. The composition comprises granular nitrogen fertilizer, calcium dihydrogen phosphate, trace elements, polyvinyl alcohol, vegetable oil and fillers. The granular nitrogen fertilizer is placed in a barrate coating machine; the calcium dihydrogen phosphate, the trace elements and the fillers are mixed uniformly and placed in a feeding tank of the coating machine; the polyvinyl alcohol is prepared as water solution with the concentration of 15 percent, poured into an elevated tank of the coating machine and at the same time rotating speed and the temperature are set; the coating machine and an air compressor are started and the water solution is sprayed on a granular surface of nitrogenous fertilizer according to the set rotating speed and the temperature; meanwhile, the mixture of the calcium dihydrogen phosphate, the trace elements and the fillers are continuously sprinkled and the coating machine and the air compressor are heated to be rotated and the mixture is dried; the vegetable oil is dropped gradually and the two machines continue to rotate and then the coating machine and the air compressors are stopped; the temperature of the mixtures is decreased to room temperature to finish the products. The fertilizer can be attached to the oil and can slowly release the nutrients to maintain the constant growth of bacteria cells, thus remarkably promoting modifying efficiency of the creatures in the oil pollution places.

The invention relates to the technical field of lubricants and particularly relates to a rustproof lubricant and a preparation method thereof. The rustproof lubricant comprises the following components in parts by mass: 40-50 parts of fatty acid glyceride, 20-30 parts of modified rapeseed oil, 4-8 parts of methyl silicone oil, 2-5 parts of a corrosion inhibitor, 4-8 parts of a nonionic surfactant, 5-9 parts of polyvinylpyrrolidone, 4-8 parts of a sulfonate rustproof agent, 3-7 parts of phosphates amine salt, 0.8-1.5 parts of a rustproof compound, 0.8-2.5 parts of sodium molybdate, 5-10 parts of ethanol, 2-5 parts of polyethylene glycol, 5-10 parts of glycerol, 0.2-0.6 part of a fungicide, 0.2-0.8 part of a solid additive and 0.1-0.5 part of an antioxidant corrosion-resistant agent. The rustproof lubricant has the beneficial effects that 1, the modified rapeseed oil is adopted as base oil, the advantages of high biodegradation rate, high viscosity index, good viscosity-temperature performance, excellent extreme pressure anti-wear property, good low-temperature fluidity, easily available raw materials and low cost are achieved; and 2, by adopting the rustproof lubricant, the advantages of high biodegradation rate and anti-wear friction-reducing capability are achieved, the friction pair bearing capacity is improved and the service life of the device is prolonged.

The invention discloses an additive and automotive methanol diesel oil thereof and a preparation method of the methanol diesel oil. The additive comprises (by wt%) mixed fatty acid esters 15, unsaturated fatty acids 7, mixed fatty acids 15, castor oil 2.8, a palmitic acid 5, a cetane number improver 0.1, C4 to C10 fatty alcohols 30, a corrosion inhibitor 0.03, ethyl acetate 11, a combustion improver 0.06, butyl acetate 9, a dispersant 0.01 and hydrogenated ricinoleic acid 5. The methanol diesel oil comprises (by wt%) methanol 10 to 30, biological diesel oil 18 to 34, standard diesel oil 26 to 67 and the additive of the invention 5 to 10. The preparation method of the methanol diesel oil comprises the following steps of: adding methanol and the additive of the invention into a mixing tank at the ratio, mixing, sequentially adding the biological diesel oil and the standard diesel oil into the mixing tank at the ratio and mixing uniformly. The additive has the advantages of low material cost and simple preparation process, and the methanol diesel oil has the advantages of stable performance, low cost, simple preparation method and easy popularization.

The invention discloses a method for preparing marsh gas by fermenting steam-explosion wood fiber straws, which comprises the following steps: cutting up the straws first and filling the same into an steam-explosion device to perform steam explosion so as to obtain powdered and threadlike steam-explosion straw materials, and putting the steam-explosion straw materials into an anaerobic biogas reactor to perform anaerobic fermentation so as to generate biogases. The content of methane in the biogas prepared by the method is higher with 65 to 75 percent. The method has multiple functions of improving the problem of the structural inhibition of the anaerobic fermentation of the wood fiber straws, obtaining clean energy source, and treats the wood fiber straw wastes in countryside simultaneously.

Amphiphilic copolymers formed from plant oil-derived vinyl ether monomers and polyethylene glycol alkyl vinyl ethers are provided. Nanoparticles coated with these amphiphilic polymers are well-suited for water remediation applications.

The invention discloses a technique of co-processing ecological type rural sewage water and rural organic solid waste. The process comprises that first adjusting supernatant fluid of an anaerobic tank and other sewage water, treating the adjusted sewage water through a tower earthworm ecological filtering tank to reach the national emission standard and blend and anaerobic ferment the lower deposits of the anaerobic tank and the rural organic solid waste in an anaerobic biogas reactor to produce biogas. The produced biogas is utilized as energy resource, the discharged methane residue is utilized as organic fertilizer or fertilizer of breeding earthworm, the obtained earthworm can also be used to adjust the purity of the post-sewage. The invention proceeds ecological and low cost treatment of the rural sewage water and rural organic solid waste via the combined action of the animal and the microorganism, simultaneously, the produced clean biogas and organic fertilizer have multiple functions of improving rural environmental quality, obtaining clean energy resource and simultaneously treating rural sewage water and rural organic solid waste.

The present invention provides a method for detecting biochemical oxygen demand. Active sludge, surface water, domestic waste water, or industrial waste water comprising microorganism is taken as a water sample with microorganism in the method provided by the present invention. The water sample with microorganism is cultivated to obtain a microorganism film. The blank water sample and the target water sample are made to pass through the microorganism film respectively. The dissolved oxygen reduction current values of the blank water sample and the target water sample are detected. The difference value between the dissolved oxygen reduction current value of the target water sample and that of the blank water sample is obtained. On the basis of the difference value and the predetermined standard curve, the biochemical oxygen demand of the target water sample is acquired. The method provided by the present invention adopts active sludge, surface water, domestic waste water, or industrial waste water comprising microorganism as the water sample with microorganism. The environmental adaptability of the prepared microorganism film is strong, so that one or more of tap water, well water, atmospheric water, or ground water may serve as medium to maintain the physiological activity with no need of providing a buffer solution system.

The invention provides a lubricating method for wind power generator, which comprises a lubricant, a wind power generator. Compound lubricant is adopted; the main lubricating parts of the wind power generator include a gear box, a generator bearing, a crab system bearing and gear, a hydraulic brake system and a min bearing. Compared with the ordinary mineral grease, the adopted compound lubricant has the advantages of excellent viscosity-temperature characteristics and little impact due to temperature change, is able to ensure easy startup under low temperature and no loss under high temperature, thereby providing sufficient lubrication for the friction parts. In addition, with excellent stability of thermal oxidation and little loss in vaporization, the lubricant can be used for a long time under rigid working condition and climatic situation. Especially, with high biodegradation rate, the compound lubricant can be widely promoted as it results in no pollution to the soil and water source.

Described is a method of producing fibers by melting process in spinning extruders by using a composition containing polyacrylonitrile (PAN), lignin and plasticizers with high boiling point and dipolar moment, such as glycerine and glycerol carbonate. The use of thermal stabilizers also derived from halogenated glycerol, known as halodridines, and additives derived from the esterification of glycerin with fatty and phosphoric acids are also described. By removing the plasticizers and the soluble additives in polar solvents, such as water and alcohols, shortly after the spinning step, it is possible to produce fibers from PAN/lignin blend with characteristics similar to those produced by traditional wet spinning process, widely used in the production of carbon fiber. The lignin used may be that obtained by the Kraft Process. The glycerin used as a plasticizer can be derived from the production of biodiesel, which does not need to be purified by distillation process.