36results about How to "Meet the requirements of circular economy development" patented technology

The invention provides a method for preparing an artificial landscape stone from regenerative construction wastes. The method is characterized by comprising the following steps of: 1) manufacturing a support of the landscape stone by channel steel or steel angles; 2) brushing a layer of releasing agent on a mould box and putting a processed landscape stone keel into the mould box to be fixed; 3) adding water into a stirring machine, adding construction waste based regenerative fine aggregates, construction waste based regenerative coarse aggregates, construction waste powder, silicate cements, artificial sand and crushed granite into the stirring machine to stir for 3-5 minutes, and pouring the mixture into the mould box; 4) putting the poured mould box into a curing chamber to carry out initial curing at constant temperature for 10-20 days; 5) demoulding the artificial landscape stone which is initially cured; 6) evenly stirring unsaturated resins, accelerants and hardening agents to prepare a binding agent; 7) uniformly smearing the binding agent to a semi-finished product; 8) performing quality inspection; and 9) putting a finished product into a warehouse. The method has the advantages that the construction wastes are comprehensively utilized, so that construction resources are saved, construction cost is reduced, and environment pollution is reduced.

The invention belongs to the field of preparation of water treatment agents, and relates to a method for preparing polymeric ferric sulfate. An acidic ferrous solution is produced to obtain polymeric ferric sulfate under the action of an oxidant in the presence of a catalyst and an auxiliary catalyst, wherein the auxiliary catalyst is urea. The method has the beneficial effects that an acid-washed waste liquid is used as a raw material, the waste resource utilization is realized, the urea is oxidized to produce carbon dioxide and nitrogen to achieve the purposes of non-residue and non-emission, the environmental protection requirement and recycling economy development requirement are met, and the production efficiency is greatly improved by using the urea as the auxiliary catalyst.

The invention relates to the technical field of biological engineering and the fields of food and medicaments, particularly provides a method for extracting refined yeast grease from yeast, particularly waste saccharomyces cerevisiae and oil production yeast, and further provides soft capsules prepared by compounding the yeast grease, vegetable grease rich in necessary fatty acid for a human body and anti-oxidation grease and a preparation method thereof. The obtained yeast grease composite soft capsules have the effects of reducing serum cholesterol and reducing blood fat; the method for producing the yeast grease by using the waste yeast has powerful results of improving the additional value of the waste yeast and generating higher economic benefit; and meanwhile, by comprehensive utilization of the waste yeast, the problem that wastes pollutes environment is solved, and the requirement of circular economy development is met.

The invention belongs to the field of nanometer technology, and particularly relates to a boric sludge comprehensive utilization method for preparing nanometer magnesia and nanocrystalline iron oxide. The boric sludge comprehensive utilization method is carried out according to the following steps of: pressing and leaching boric sludge in a hydrochloric acid system at a low temperature; filtering and separating to obtain magnesium chloride and ferric chloride leachate and borosilicate-rich residue; adding MgO or Fe2O3 to the magnesium chloride and ferric chloride leachate to adjust the pH (Potential Of Hydrogen) of the leachate; adding H2O2 to oxidize bivalent ferrous ions in the leachate into ferric ions during precipitating, in order to precipitate and separate the iron ions in the leachate in a form of ferric hydroxide; filtering and separating to obtain an Fe(OH)3 precipitate and a magnesium chloride solution; roasting the obtained Fe(OH3) precipitate to obtain Fe2O3 powder; and directly pyrolyzing the obtained magnesium chloride solution, thus obtaining the nanometer MgO powder and a hydrochloric acid solution, wherein the hydrochloric acid solution can be returned to be recycled. The boric sludge comprehensive utilization method has high leaching efficiency, enables the leaching time to be reduced, saves the energy, reduces the exhaust emission, realizes non-waste clean production in the whole process, and is a novel typical green and clean production process.

The invention relates to a stabilized soil for road bases, in particular to a kind of stabilized soil for bases used in roads produced by utilizing the processed construction waste and by-products of industrial production, and also relates to a production method of the stabilized soil. A stabilized soil for a road base, comprising the following components in mass percentage: 60-80% of graded gravel produced in the crushing process of construction waste, 2-5% of petroleum coke residue, 0.5-1% of white mud, and 10% of fly ash ~16%, lime 2~5%. The production method of the road base stabilized soil provided by the invention comprises the steps of crushing and gradation adjustment, grinding, weighing and measuring, stirring and the like. The various detection indicators of the stabilized soil for road bases provided by the invention conform to the provisions of the "Technical Specifications for Construction of Highway Pavement Bases" on base materials; equipment, low cost, economic and environmental protection.

The invention discloses a low-temperature resisting co-polypropylene modified material as well as a preparation method and an application thereof. The low-temperature resisting co-polypropylene modified material comprises the following raw materials in percentage by weight: 60-98% of co-polypropylene, 1-20% of an elastomer, 0-10% of linear low-density polyethylene, 0-8% of stem grafting polyethylene, 0.1-1% of a stabilizer and 0.1-1% of a processing agent. The modified material has both good tension strength and high-temperature property and good low-temperature property, the performances of a conventional polypropylene plastic sealing stripe are improved, the requirements on use of the plastic sealing stripe at high and low temperatures are met, and the modified material can be used for preparing various plastic sealing stripes, such as air container sealing stripes, cultivation sealing stripes, self-locking type sealing stripes and anti-theft sealing stripes.

The invention discloses a method for modifying asphalt by using pyrolytic oil heavy fraction of a waste printed circuit board. The crushed pyrolytic oil high-temperature heavy fraction powder of the waste printed board, which is used as a modifier is added into the asphalt so as to improve the high temperature performance of road asphalt, and greatly improve rolling resistance and stability of the road asphalt; the high-temperature fraction in the pyrolytic oil of the waste printed circuit board is extracted by fractionation, and is crushed and sieved at high temperature, heavy fraction powder of which the grain size is greater than 200 meshes is used as the asphalt modifier, and 2 to 10 weight parts of pyrolytic oil heavy fraction of the waste printed circuit board, which is used as the modifier is added into 90 to 98 weight parts of petroleum asphalt at the temperature of between 130 and 160 DEG C to form a mixture and the mixture is stirred under the condition of heat preservation for 0.5 and 1 hour to form the modified asphalt; and in the method, all components of a liquid product which is obtained after a circuit board is treated by a pyrolysis method are utilized, the performance of asphalt is improved and the cost of the modified asphalt is reduced.