34results about How to "Stable and improved quality" patented technology

The invention discloses a synthetic method of 2,3-dichloropyridine(III). The synthetic method of 2,3-dichloropyridine comprises the following steps: (1) taking pyridine (I) as a main starting raw material, taking water or water vapor as a reaction medium, reacting the pyridine with chlorine completely in the presence of a chlorination inducer to obtain pyridine chloride (II) as a reaction raw material for the next step; (2) taking the pyridine chloride (II) obtained from the first step as the reaction raw material, taking water or water vapor as a reaction medium, enabling the pyridine chloride (II) to be in contact with hydrogen in the presence of an acid-bining agent and a catalyst, and carrying out catalyzed hydrogeneration reduction reaction to obtain the 2,3-dichloropyridine (III) of which the purity is 99% or above, wherein the catalyst is a nano IrO2-ZnO-MnO2 composite catalyst. A reaction equation is as shown in the specification, wherein n ranges from 2 to 5. The synthetic method of 2,3-dichloropyridine has the advantages of high reaction conversion, high selectivity, stable product quality, simplicity in production and operation, low cost and the like, and the shortcomings that the quality of the 2,3-dichloropyridine (III) obtained by an existing synthetic method is not stable, and the quality of the 2,3-dichloropyridine (III) can reach up to the standard after the 2,3-dichloropyridine (III) is rectified repeatedly necessarily are overcome.

The invention belongs to the technical field of tobacco planting, and particularly relates to a method for effectively reducing the content of heavy metal arsenic in tobacco leaves. The method utilizes the technical principle that molybdenum can antagonize arsenic, and antagonizes the absorption and utilization of the arsenic by the tobaccos by applying trace element molybdenum during tobacco planting. Specifically, after tobacco seeds are normally sown and nursed, and before transplanting of tobacco seedlings and ridging, soluble molybdenum salt is uniformly sprayed (or directly dissolved inirrigation water) to cultivated soil; cultivation and management can be carried out according to conventional field management measures in the later stage; the use amount of the soluble molybdenum salt is specifically 700-1100 mg / L, and the amount applied in the soil is 400-600 L / mu, that is, 0.28-0.66 kg / mu. The method for reducing the arsenic content in the tobacco leaves has the advantages of being low in cost, simple and easy and practical and reliable, can fundamentally reduce the arsenic content in the tobacco leaves, and can lay a foundation for the stability and improvement of tobaccoleaf quality.

The invention belongs to the field of production of Pu'er tea, and concretely discloses a bacterial strain of Paecilomyces lilacinus and an application thereof to production of the Pu'er tea. The bacterial strain of Paecilomyces lilacinus is Paecilomyces lilacinus TMCC 70004, and the booked number of the bacterial strain in the China general microbiological culture collection center is CGMCC No.8680. The bacterial strain of Paecilomyces lilacinus is applied to pile fermentation process of the Pu'er tea, and the Pu'er tea soup with red, thick, warm and smooth mouthfeel is obtained; at the same time, the bacterial strain can be used for degrading residual pesticides in the Pu'er tea raw material, in order to improve the index of pesticide residue of the Pu'er tea.

The invention belongs to the hydrogenation technology of castor oil, and more particularly relates to a high-temperature and high-pressure hydrogenation method of the castor oil. The high-temperature and high-pressure hydrogenation method of the castor oil adopts a high-temperature and high-pressure hydrogenation method with the reaction pressure of 2 to 2.5MPa and the temperature of 130 to 150 DEG C; the technique solves the problems in the prior operating technique, shortens the reaction time, with the whole acidolysis time being 7 to 8 hours, improves the utilization ratio of the equipment, and stabilizes and improves the product quality, with the iodine value of less than 3.0g / 100g. Meanwhile, the high-temperature and high-pressure hydrogenation method of the castor oil also greatly reduces the production cost, saves electricity and labor cost by 50 percent, halves the equipment depreciation and doubles the production efficiency.

An Aspergillus oryzae Pasp 0502 (CGMCC No.1374) is prepared through culturing in natural culture medium and purifying culture. It can be used in the production of Pu'er tea for increasing the contents of theapolyose and bisterin in Pu'er tea and shortening the productive period.

The invention discloses a synthetic method of 2,3-dichloropyridine(III). The synthetic method of 2,3-dichloropyridine comprises the following steps: (1) taking pyridine (I) as a main starting raw material, taking water or water vapor as a reaction medium, reacting the pyridine with chlorine completely in the presence of a chlorination inducer to obtain pyridine chloride (II) as a reaction raw material for the next step; (2) taking the pyridine chloride (II) obtained from the first step as the reaction raw material, taking water or water vapor as a reaction medium, enabling the pyridine chloride (II) to be in contact with hydrogen in the presence of an acid-bining agent and a catalyst, and carrying out catalyzed hydrogeneration reduction reaction to obtain the 2,3-dichloropyridine (III) of which the purity is 99% or above, wherein the catalyst is a nano IrO2-ZnO-MnO2 composite catalyst. A reaction equation is as shown in the specification, wherein n ranges from 2 to 5. The synthetic method of 2,3-dichloropyridine has the advantages of high reaction conversion, high selectivity, stable product quality, simplicity in production and operation, low cost and the like, and the shortcomings that the quality of the 2,3-dichloropyridine (III) obtained by an existing synthetic method is not stable, and the quality of the 2,3-dichloropyridine (III) can reach up to the standard after the 2,3-dichloropyridine (III) is rectified repeatedly necessarily are overcome.

The invention discloses a method for performing nonlinear prediction on coke quality on the basis of cohesiveness and coal-rock indexes of single coal, which provides important technical guarantee for improving the stability and quality of coke produced by coke making enterprises. The method comprises the following steps of: establishing an information database storing qualities and coke quality indexes of the single coal for coking, and inputting the cohesiveness indexes and the coal-rock indexes of the single coal for coking into the coal information database; establishing a coal quality prediction model, and predicting quality indexes of matched coal by virtue of a clustering and support vector machine; defining the quality indexes of the matched coal, and predicting quality indexes of the coke according to the quality indexes of the single coal; and establishing a model for predicting the crushing strength and abrasive resistance of the coke. The invention further provides a coke quality prediction system with optimized coal blending of coal-rock, which aims to stabilize and improve the coke quality and reduce the coal blending cost, can form a prediction model with multiple parameters and high accuracy for the coal quality indexes and the coke quality indexes, and simultaneously, has a real-time updating function or a manual intervention function.

The invention relates to a rhizopus oligorrhizae fungus and its application in the production of Pu'er tea, which belongs to the field of biological technology. Rhizopus arrhizus of the present invention is obtained after traditional preliminary screening, re-screening, natural culture medium cultivation, and rhizopus purification and cultivation procedures by producing bacterial strains and auxiliary materials, and the producing bacterial strain is Rhizopus arrhizus (Rhizopus arrhizus) Prhi501, preserved In the General Microbiology Center of the China Microbiological Culture Collection Management Committee, the address of the preservation unit is: No. 13, Beiyi Yiyi, Zhongguancun, Haidian District, Beijing, the preservation date: March 1, 2007, and the preservation number: CGMCC No.1963. The Rhizopus oligorrhizae fungus can improve the quality of Pu'er tea, and can be applied in the production process of Pu'er tea. The present invention has the advantages that: the rhizopus abacifolia fungus is used in the large-scale production process of Pu'er tea in the proportion of 0.1-0.8% by weight, and the tea polyphenols and theabrownin in the Pu'er tea can be controlled at an appropriate ratio. It achieves the effect of improving quality, shortens the processing time, and plays an important role in stabilizing and improving the quality of Pu'er tea.

The invention belongs to the technical field of tobacco planting, and in particular relates to a method for effectively reducing the heavy metal chromium content in tobacco leaves. This method uses the technical principle of molybdenum to antagonize chromium, and by adding trace element molybdenum in the process of tobacco planting, thereby antagonizing the absorption and utilization of chromium by tobacco. , evenly spray soluble molybdenum salt (or directly dissolve in irrigation water) into the cultivation soil; in the later stage, follow the conventional field management measures for cultivation and management; the specific dosage of soluble molybdenum salt is: 700~1100mg / L , the application amount in the soil is: 400~600L / mu, that is, 0.28~0.66kg / mu. The method for reducing the chromium content in tobacco leaves provided by the application has the characteristics of low cost, simplicity, practicality and reliability, can fundamentally reduce the chromium content in tobacco leaves, and can lay a foundation for the stability and improvement of tobacco leaf quality.

The invention relates to a viride trichoderma fungus and its application in the production of Pu'er tea, which belongs to the field of biotechnology. The Trichoderma viride fungus of the present invention is obtained after the traditional primary screening, re-screening, natural medium culture, and Trichoderma purification and cultivation process by the production strain and auxiliary materials. The production strain is Trichoderma viride (Trichoderma viride) PTri050102, which is preserved in General Microbiology Center of China Microbiological Culture Collection Management Committee, the address of the preservation unit: No. 13, North Yiyi, Zhongguancun, Haidian District, Beijing, the preservation date: March 1, 2007, and the preservation number: CGMCC No.1962. The viride trichoderma fungus has the function of improving the quality of Pu'er tea, and can be applied in the production process of Pu'er tea. The present invention has the advantages that: when Trichoderma viride is used in the large-scale production process of Pu'er tea in a proportion of 0.1-0.8% by weight, the tea polyphenols and theabrownin in the Pu'er tea can be controlled at an appropriate ratio to reach The effect of improving quality and shortening the processing time plays an important role in stabilizing and improving the quality of Pu-erh tea.

The invention discloses saccharomyces cerevisiae and the application thereof in wine brewing. The saccharomyces cerevisiae is saccharomyces cerevisiae NJZCC17 CGMCC No. 3284. The saccharomyces cerevisiae NJZCC17 is used to brew wine. Compared with the widely used reference commercial saccharomyces cerevisiae strain, the sugar content in the wine prepared by the saccharomyces cerevisiae is 1 to 4 percent, the alcohol content thereof is 9 to 14 percent and the glycerol yield thereof is 4 to 11g / L, the yield of hydrogen sulfide, acetaldehyde, acetic acid, urea and other metabolites which are bad for the flavor or the quality of the wine is lower, the malic acid utilization rate is higher, the volatile aroma components are balanced, the total ester yield is higher and the total high-grade alcohol yield is appropriate, the taste is more complicated and the brewing time is shortened; and therefore, the invention displays important roles in stabilizing and improving the quality of the domestic dry red wine, and displaying the brewing potential of cabernet sauvignon and other red wine in Hebei Changli production area.

An Asperfillus niger Pasp 0501 (CGMCC No.1373) is prepared through providing bacterial seeds and auxiliaries, screening, screening again, culturing in natural culture medium, and purifying culture. It can be used in the production of Pu'er tea for increasing the contents of theapolyose and bisterin and shortening productive period.

The invention belongs to the technical field of tobacco planting, and in particular relates to a method for effectively reducing the content of heavy metal arsenic in tobacco leaves. This method uses the technical principle of molybdenum to antagonize arsenic, and by adding trace element molybdenum in the process of tobacco planting, it antagonizes the absorption and utilization of arsenic by tobacco. , evenly spray soluble molybdenum salt (or directly dissolve in irrigation water) into the cultivation soil; in the later stage, follow the conventional field management measures for cultivation and management; the specific dosage of soluble molybdenum salt is: 700~1100mg / L , the application amount in the soil is: 400~600L / mu, that is, 0.28~0.66kg / mu. The method for reducing the arsenic content in tobacco leaves provided by the application has the characteristics of low cost, simplicity, practicality and reliability, can fundamentally reduce the arsenic content in tobacco leaves, and can lay a foundation for stabilizing and improving the quality of tobacco leaves.

The invention belongs to the technical field of rare earth cascade extraction automatic control, and particularly relates to a rare earth extraction process dynamic operating control method based on data driving. A soft measurement model with rare earth element component content is established by using an LSSVM (least square support vector machine), a cluster-based LSSVM sparsity improvement method and an LSSVM model dynamic updating method are provided, and a dynamic operating optimizing method for the rare earth extraction production process is provided based on the improved LSSVM so as to determine the optimum adjustment amount of various control variables during disturbance, so that dynamic and precise control over the rare earth element component content is realized, and further the quality of rare earth products is improved. The method can be used for stably improving the quality of the rare earth products.

The invention relates to the application of ultraviolet light sterilization technology in processing Pu'er tea, wherein the ultra-violet light sterilization technique is employed into the production process of Pu'er tea, more specifically, into the sterilization of Pu'er tea raw material and workshops. The production process also comprises the conventional heating, sterilizing with alcohol, hydrogen peroxide and ozone. The quality and stability of the Pu'er tea can be improved.

The invention provides a processing technique of a fragrant Bailin Kongfu black tea, belonging to the technical field of Kongfu black tea processing and solving the problem of Kongfu black tea in theprior art. The fragrant Bailin Kongfu black tea takes tea leaves appropriate for preparing black tea as raw materials, and the finished product is prepared by the following steps of green drying, green rotating, combined withering, screening and conditioning, rolling, fermentation, primary curing and combined curing. The processing technique improves the endoplasm feature of Bailin Kongfu, leads the endoplasm aroma to be with keen sweetness and with obvious flower and fruit fragrance; tea soup has charming red color and brightness; and taste is mellow and sweet and has fruity fragrance. The Bailin Kongfu black tea prepared by the processing technique has keen fragrance, sweetness and obvious fleur in taste, is very popular among consumers and vast tea lovers, and has obvious economical benefits.

A Saccharomyces cerevisiae Psac 0501 (CGMCC No.1372) is prepared through culturing in natural culture medium and purifying culture. It can be used in the production of Pu'er tea for increasing the contents of theapolyose and bisterin in Pu'er tea and shortening productive period.