7results about How to "Good separation and purification effect" patented technology

The utility model relates to the technical field of environment-friendly treatment of industrial sewage, in particular to a yellow phosphorus production sewage circulating purification system, which is provided with a yellow phosphorus sewage tank, a multi-stage sedimentation mechanism, a concentration filtering mechanism and a clear liquid collecting tank which are sequentially arranged along a sewage treatment flow, the yellow phosphorus sewage tank is used for collecting yellow phosphorus production sewage; the multi-stage sedimentation mechanism is provided with a plurality of deep cone sedimentation machines which are arranged in series and are used for carrying out sedimentation separation on the conveyed yellow phosphorus sewage; the concentrating and filtering mechanism is used for concentrating and separating the conveyed settling floating liquid; and the clear liquid collecting tank is used for collecting the clear liquid separated by the concentrating and filtering mechanism and conveying the clear liquid to the phosphorus collecting tower through a water conveying pipe. Aiming at the special characteristics of yellow phosphorus production sewage purification treatment, the utility model constructs a closed circulation purification system, has the technical characteristics of greatly reducing the occupied area, being low in construction and operation cost and excellent in separation and purification effect, and has remarkable technical effect and economic benefit.

The invention discloses a method for preparing a 2'-modified alkaline nucleoside, the preparation method comprising: using a nucleoside initiator as a raw material, reacting with a reagent containing a protecting group, and protecting the 2'-hydroxyl group of the nucleoside initiator; after the reaction is complete, performing post-treatment: quenching the reaction solution, and adjusting the system pH to 7-8 after quenching; purifying the mixture obtained by the post-treatment, and the purification is performed using a cation exchange resin. The method of the invention has the advantages of simple operation, good separation and purification effect, low cost, high safety factor and high yield, and can better solve the separation and purification problem of nucleosides in which the hydroxyl group is protected by various protecting groups.

The application of PCE-11 as a modifier in the flotation separation of brucite and serpentine relates to the field of brucite beneficiation and purification technology. This invention provides a flotation separation method for brucite and serpentine using PCE-11 as a modifier. By introducing PCE-11, the difference in floatability between brucite and serpentine during flotation is amplified, achieving effective separation of brucite and the gangue mineral serpentine. This invention has advantages such as high efficiency, low cost, no pollution, and simple process.

The invention relates to the technical field of biology, and particularly discloses a method for maintaining solution stability in the separation and purification process of oligosaccharide fermentation broth. In the purification and separation process of the oligosaccharide fermentation broth, the pH value of the oligosaccharide fermentation broth is adjusted to be 6-8 and the temperature of the oligosaccharide fermentation broth is 40-100 DEG C when the oligosaccharide fermentation broth passes through a sequential simulated moving bed chromatographic system; the method can reduce the change of oligosaccharide and other components (such as fucosyllactose, lactose, glucose and the like) in the purification and separation process, achieves the purpose of maintaining the stability of the oligosaccharide solution, finally achieves a better separation and purification effect, and obtains a product with higher purity. The method can be applied to the synthesis process of other milk oligosaccharides such as fucose lactose (FL), lactose-N-tetraose (LNT), lactose-N-neotetraose (LNnT), lactose-N-fucopentasaccharide (LNPFI) and the like or other carbohydrates containing a lactosyl group, and has a relatively high application value.

The invention discloses a comprehensive separation and purification platform and a control system thereof, and relates to the technical field of medicine separation and purification, the comprehensive separation and purification platform comprises a separation tower, a filtering mechanism, a fixed column, a lifting assembly, a detection piece and a control module, the separation tower is hollow, the filtering mechanism is arranged in an inner cavity of the separation tower, and the fixed column is arranged in the inner cavity of the separation tower; an input port of the filtering mechanism is connected with a feeding pipeline, a discharging pipe is arranged at an output port of the filtering mechanism, the fixing column is connected to the inner wall of the separating tower, a cavity is formed in the fixing column, the lifting assembly is arranged in the cavity of the fixing column, an adsorption unit is arranged on a lifting part of the lifting assembly, and the adsorption unit is connected with the filtering mechanism. A first waste liquid pipe and a connecting pipeline are connected to the side wall of the fixing column, a filtering pipeline is arranged at an output port of the fixing column, the detection part is arranged in an inner cavity of the separation tower, the detection part is connected with the filtering pipeline, and the filtering pipeline is further connected with the output pipeline. The method has the effect of improving the target substance separation effect.

The invention provides an adsorbent for purifying diethyltoluenediamine and a preparation method and an application method thereof, and belongs to the technical field of chemical industry. The adsorbent is loaded into a column, the prepared diethyltoluenediamine product is added, eluted, the eluate is collected, and the solvent is removed under reduced pressure to obtain diethyltoluenediamine. The method of the invention can better separate and purify diethyltoluenediamine with high selectivity, and the obtained diethyltoluenediamine has high purity and few impurities, and has broad application prospects.

The invention relates to the field of separation and purification, and discloses a method for separating and purifying serrapeptase based on a two-step salting-out extraction system of tert-butyl alcohol and inorganic salt. The serrapeptase in the fermentation liquor is separated and purified through a two-step salting-out extraction technology, specifically, the serrapeptase in the fermentation liquor is concentrated in the lower phase through salting-out extraction of tert-butyl alcohol and phosphate in the first step, macromolecular substances such as bacterial cell fragments are removed, then extraction salting-out of tert-butyl alcohol and sodium chloride in the second step is carried out, and the serrapeptase in the fermentation liquor is separated and purified. And concentrating and purifying the serrapeptase, so that the serrapeptase is enriched in the middle phase. The method has good separation and purification effects, after two steps of salting-out extraction, the purification multiple of the serrapeptase is 3.2 times, the recovery rate is 93.0%, the electrophoresis purity of the obtained serrapeptase is close to 100% through SDS-PAGE gray analysis, and the serrapeptase freeze-dried powder can keep the enzyme activity of 89.1% after being stored for 180 days at the temperature of-80 DEG C.