39results about How to "Has the prospect of industrialization" patented technology

The invention provides a phosphonic acid-based block polymer, and a preparation method and application thereof. The phosphonic acid-based block polymer is high in adsorption capacity and saturation adsorption capacity, the initial high dispersion of low-water-glue-ratio concrete can be achieved, the viscosity of a system is reduced, and the sulfate and clay interference resistance is high. The preparation method of the phosphonic acid-based block polymer comprises the step that the phosphonic acid-based block polymer is prepared from an ether-type fragment A, a phosphonic acid-based section Band a third part aldehyde C through a copolycondensation reaction, wherein the molar ratio of the ether-type fragment A to the phosphonic acid-based section B is 1:(0.8-5.0), the ether-type fragment Ais obtained from polyether monomer a of a special structure and first part aldehyde C through polycondensation, and the molecular weight of the polyether monomer a is 1200-4800 and is preferably 1500-2500; the phosphonic acid-based section B is obtained from phosphonic acid group containing monomer b and monomer c of a special structure and second part aldehyde C in an aprotic weak-polar solventE through polycondensation.

The invention relates to the field of industrial wastewater treatment, in particular to a method for treating propylene oxide high-COD alkaline wastewater by a biochemical process; the method is an economical and effective treatment method for propylene oxide industrial wastewater, and the invention adopts acidification treatment, gas Floatation treatment, coagulation sedimentation and ozone oxidation treatment continuously reduce the COD content in the wastewater until it reaches the biochemical treatment standard, and finally use biochemical treatment to completely remove the COD in the wastewater, especially a metallocene composite flocculant is used in the present invention To flocculate the COD in the wastewater, the COD value in the water can be reduced by 40%-60%. It is especially suitable for the treatment of propylene oxide high COD alkaline wastewater. The cost of wastewater treatment in the method of the present invention is low, the floor area is small, and it is easy to Implementation has the prospect of industrialization.

The invention discloses a special admixture for medium / low-slump concrete. The special admixture for medium / low-slump concrete is a multi-branched-chain three-dimensional-structure low-molecular-weight compound, wherein the molecule central core is provided with 3-8 alkoxy groups, and each alkoxy group is connected with an adsorption functional group through a molecule connecting arm; the molecule connecting arms and adsorption functional groups are branched chains; each molecule connecting arm is in a polyoxyalkylene ether structure; the number of the branched chains is 3-8; and each adsorption functional group is a multiphosphate or multi-phosphorous acid. The raw materials of the special admixture for medium / low-slump concrete are easy to purchase, and the technique is simple and feasible; and thus, the special admixture for medium / low-slump concrete smoothly satisfies the demand of long slump retaining time (6 hours or above) for concrete under harsh conditions (such as high temperature, super-long-distance super-long-time transportation and the like), has low sensitivity to cement, sandstone aggregate and water consumption, has high sulfate and clay interference resistance, effectively enhances the early strength of the concrete, can implement long slump retaining time of medium / low-slump concrete, and improves the workability.

The invention provides a high-temperature-resistant phosphono-containing concrete retarder and a preparation method thereof. The phosphono-containing concrete retarder has the advantages of high temperature resistance and excellent setting retarding effects, can enhance the adaptability of a polycarboxylic acid water reducing agent to machine-made sand and low-activity admixtures, lowers the sensitivity to cement, temperature and water consumption, and enhances the sulfate and clay tolerance. Under the synergic action of the polycarboxylic acid water reducing agent, the concrete retarder obviously improves the concrete workability, and is suitable for preparing concrete under harsh working conditions, such as low sandstone material quality, high-temperature environment, long-time transportation and the like. The preparation technique is simple, and has high feasibility for industrial production and broad market application space. The concrete retarder has important technical support effects on promoting the market application of the polycarboxylic acid water reducing agent and enhancing the rheological properties, mechanical properties and durability of the concrete.