3results about How to "Improve coagulation performance" patented technology

The invention belongs to the technical field of coagulants, and discloses a titanium gel coagulant, a composite titanium salt coagulant, a preparation method and application, the titanium gel coagulant is a TiCl4-ethanol-acetylacetone-water mixture, and the composite titanium salt coagulant is a composite preparation formed by compounding the titanium gel coagulant with a coagulant aid. The titanium gel coagulant and the composite titanium salt coagulant have the characteristics of low material price, simplicity in synthesis, good turbidity removal effect and the like, in addition, the titanium gel coagulant and the composite titanium salt coagulant not only enrich the research content of the coagulant, but also provide a new technical choice for the field of water treatment, and are stable in property and suitable for industrial production. The long-term storage and use can be realized.

The invention relates to a method for treating textile printing and dyeing wastewater by using a rare earth modified Ti-based xerogel coagulant, which comprises the following steps: (1) preparation of the rare earth modified Ti-based xerogel coagulant: adding rare earth metal salt into a mixed solution of ethanol and acetylacetone, and dropwise adding titanium tetrachloride after the rare earth metal salt is completely dissolved; and dropwise adding a mixed solution of ethanol and distilled water, uniformly stirring, and drying to obtain the product. And (2) adding the rare earth modified Ti-based xerogel coagulant into the textile printing and dyeing wastewater, stirring, and standing. The treatment method provided by the invention has the advantages of simple operation, slow effluent pH change, high coagulation efficiency and the like, and shows good coagulation performance on high-turbidity and high-organic-matter textile printing and dyeing wastewater. Experiments show that the combination of the titanium salt and the rare earth metal salt gives full play to the advantages of the two metal coagulants, so that the coagulation process is applicable to wider water quality conditions, and the synthesized composite coagulant has good stability and coagulation effect.

This invention provides a polymer, an ultra-high temperature oil well cement retarder, its preparation method and application, and a cement slurry. The molecular structure of the polymer is shown in formula (1): In formula (1), a, b, and c are all molar numbers, and the ratio of the three is 40-85:10-40:5-20; R1 is one of -H, -CH3, and -CH2COOH; R2 is selected from one of the following compounds: The ultra-high temperature oil well cement retarder provided by this invention can withstand temperatures up to 240℃. In the temperature range of 110-240℃, the cement slurry thickening time is linearly adjustable within 200-500 min and has a good linear relationship with temperature and dosage. It has good compatibility with other admixtures, has little impact on the mechanical properties of cement stone, and can ensure the safety of ultra-high temperature cementing operations and meet the cementing technical requirements of complex and difficult wells.