33results about How to "Low application value" patented technology

The invention discloses a method of utilizing electric furnace slag to prepare spherical vaterite calcium carbonate centralized in granularity distribution. The method includes steps: mixing the electric furnace slag with ammonium chloride solution for reaction to obtain leachate containing calcium ions; feeding carbon dioxide gas into the leachate for reaction to generate calcium carbonate granules. The method is characterized by adding ammonia water into the leachate and feeding carbon dioxide in a microwave radiation state for reaction at the same time. Calcium carbonate prepared by the method has a centralized granularity distribution range and is spherical, stable in performance and high in added value, and crystal form of calcium carbonate has the characteristics of vaterite.

The invention discloses a method for preparing 2,5-dichlorobenzonitrile. The method comprises the following steps: 1) using p-dichlorobenzene and formaldehyde or / and paraformaldehyde as raw materials, in the process of chloromethylation and catalyst Under the action, the only chloromethylation product 2,5-dichlorobenzyl chloride is obtained by chloromethylation reaction; 2) the product 2,5-dichlorobenzyl chloride obtained in step 1) is used as raw material, and ammonia, oxygen Ammoxidation reaction occurs under the action of catalyst to obtain 2,5-dichlorobenzonitrile. The invention also discloses a special catalyst used in the above method for preparing 2,5-dichlorobenzonitrile and a preparation method thereof. Compared with other methods, the method of the invention has the advantages of cheap and easy-to-obtain reaction raw materials, simple and convenient process route, low reaction temperature, environmental friendliness, strong selectivity, high yield and the like. The special catalyst has high selectivity and activity; the preparation method is simple, the cost is low, and the catalyst has good thermal stability and mechanical strength, and can be used in both fixed-bed and fluidized-bed reactors.

The invention relates to the high-efficiency expression, purification and application of mannanase and its homologues and GLP-1 recombinant fusion protein. Through gene recombination technology, the mannanase and its Homologs and GLP-1 recombinant fusion protein, obtained high-yield mannanase and its homologues and GLP-1 recombinant fusion protein through the separation and purification method of filtration and concentration, with high fermentation expression and simple separation steps, It solves the limitations of the current GLP‑1 analogues, such as low yield, high cost, and frequent injections. The mannanase of the present invention and its homologue and GLP-1 recombinant fusion protein not only have the hypoglycemic effect of the injection, but also can lower the blood sugar and reduce body weight through oral administration, and have a great effect on obese and prediabetic patients. Good application value. At the same time, it provides a basis for further research on the mechanism of lowering blood sugar and weight loss of mannanase and its homologues and GLP-1 recombinant fusion protein.

The invention relates to novel chloroethyl nitrosourea with anticancer activity and a synthesizing method thereof. The chloroethyl nitrosourea is a compound with a structure of the general formula (I), wherein n is an integer of 2 to 6. The chloroethyl nitrosourea can be used for treating gliomatosis cerebri, colon cancer and leukemia; compared with the existing nitrosourea-type anticancer medicine, the drug resistance is lower, the chemical therapy effect is better, the preparation method is simple in operation, the reaction yield is high, the toxicity is small, the cost is low, the method is suitable for the industrialized production, the development prospect is wide, and the application value is good.

The invention belongs to methods for killing bacteria and fungi in chlamydomonas reinhardtii and discloses a method for sterilization in a chlamydomonas reinhardtii culture process by mixture of tebuconazole and nalidixic acid. The method includes: A, inoculating chlamydomonas contaminated by mixed bacteria onto a TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in an occulting light period of 14 / 10 and under the light intensity of 8000Lx; C, transferring the chlamydomonas well grown on the TAP solid medium plate to a TAP plate with mixed antibacterial agents, and culturing for 5-8 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx; D, transferring the sterilized chlamydomonas to the common TAP solid medium plate, and culturing for 3-5 days at the temperature of 23+ / -0.5 DEG C, in the occulting light period of 14 / 10 and under the light intensity of 8000Lx to achieve a standby for subsequent experiments or breed conservation. The method has the advantage that the problem of bacterial contamination in scientific experiment and application process of chlamydomonas is solved by adoption of the mixed antibacterial agents for treating bacterial and fungus contamination of chlamydomonas.

The invention discloses a technical scheme of a remote sensing time sequence abnormity detection method. The method can synchronously detect a plurality of time abnormities existing in a remote sensing time sequence, the confidence coefficient of all the abnormities is 95% and the abnormal confidence coefficient of the single abnormity is greater than 99% when the significance level alpha is 0.05, and time information, level information, degree information and confidence coefficient information of the abnormities are provided synchronously. According to the basic thinking, firstly, first-order season difference is performed on an original remote sensing time sequence to obtain a difference sequence serving a season error sequence; robustness estimation is performed on the mean value and the standard deviation of the season error sequence, and z standardization is performed on the season error sequence to obtain a standard score sequence serving as a time sequence abnormity test statistic sequence; a test statistic critical value is calculated under control of a given significance level and a multiple test total error rate; the absolute value and the critical value of the test statistic sequence are compared, the abnormities are marked as abnormal points when preset conditions are met, p values of the abnormities are calculated according to the test statistic of the abnormal points and converted into the confidence level. The abnormities in the remote sensing time sequence are detected through the procedure, and the time information, the level information, the degree information and confidence coefficient information of the abnormities are obtained.

The invention discloses a method for producing a high molecular polymer material. The method comprises: S1. Flowing the first reaction raw material flow containing diolefins into the first reaction zone, and polymerizing under the action of a catalyst to obtain The flow of polydiene rubber; S2. The flow obtained in step S1 is passed into the second reaction zone, and the added second reaction raw material flow containing monoolefin monomer continues to undergo polymerization reaction to obtain an intermediate product flow; S3, The intermediate product stream in step S2 is melt-kneaded in the presence of a crosslinking agent to obtain the high molecular polymer material. The product of the invention is a performance thermoplastic elastomer, which has the advantages of plastic and rubber, and has good toughness, elasticity, stretchability and elongation at break.

The invention relates to a preparation method of a clay mud inhibitor, as well as a product and application thereof. The preparation method comprises the following steps of (1) heating maleated rosin,premixing the maleated rosin and polyethylene glycol, and carrying out esterification reaction to obtain an intermediate product; (2) adding anhydrous sodium carbonate into the intermediate product obtained in the step (1), continuously reacting, and obtaining the clay mud inhibitor. Since the long and widespread problem that a concrete aggregate contains mud so as to influence the concrete quality exists, the invention provides a new solution, the clay mud inhibitor obtained through the preparation method provided by the invention is a modified abietic acid polycarboxylic acid mud inhibitor,and the clay mud inhibitor is regulated to have a specific molecular weight and a structure through the preparation method, so that the sensitivity of a low polycarboxylic acid water reducing agent on a clay is effectively reduced. When the mud content of the aggregate is higher, the mud inhibitor can inhibit the aggregate from adsorbing the water reducing agent, so that the adverse effects of big additive dosage fluctuation, reduced concrete strength, instable quality, difficulty in construction and the like caused by the reason that the aggregate contains the mud can be effectively overcome, the construction quality safety is further improved, and the clay mud inhibitor has a larger application value.

The invention belongs to the technical field of polymer synthesis, and in particular relates to polyester-polyether polyol for a microporous PU (polyurethane) shoe sole and a preparation method of the polyester-polyether polyol as well as a PU shoe sole stock solution prepared from the polyester-polyether polyol and a preparation method of the PU shoe sole stock solution. The polyester-polyether polyol for the microporous PU (polyurethane) shoe sole is a copolymer of epoxypropane and ethylene oxide by taking aromatic polyester polyol as an initiator, and a hydroxyl value is 48 to 112mg KOH / g; the epoxypropane in a molecular chain accounts for 50 to 75wt percent, and the ethylene oxide accounts for 10 to 20wt percent. The polyester-polyether polyol provided by the invention is low in viscosity, high in end group activity, and narrow in molecular weight distribution, has the characteristics of being wide in formula process tolerance and good in dimensional stability in the preparation of microporous elastomeric materials, and has the characteristics of good mechanical properties such as high tear strength, high tensile strength, and high stretch rate of the polyester shoe sole stock solution and the properties of low viscosity and hydrolysis resistance of a polyether shoe sole stock solution, and the very good application value is achieved.

The invention discloses a VOCs treatment method and a device thereof, and relates to the field of regeneration of activated carbon or zeolite that has adsorbed VOCs. The treatment device includes a VOCs gas treatment interface connected to an adsorption tower, a treatment gas pipeline, a catalytic combustion reactor, a purification Pipeline, induced draft fan, flue gas regulating valve, mixer, clean flue gas interface for connecting with the adsorption tower and providing clean flue gas for the adsorption tower, liquefied gas storage device, gas burner, air intake for connecting with the atmosphere Ducts, clean flue gas discharge ducts, blowers for feeding air into the clean ducts. By adjusting the technological process, the inventor solved the contradiction between the high pressure of the gas combustion chamber and the low pressure of the combustion fan of the gas burner under the premise of realizing the normal operation of the catalytic combustion reactor and the gas burner. At the same time, under the premise of changing the process flow, through the innovation of the structure, the secondary impact brought by the overheated air flow is solved, and the stable, reliable and efficient operation of the device is guaranteed.