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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 32. Отображено 32.
14-04-2023 дата публикации

Novel internal component and fluidized bed reactor

Номер: CN115957699A
Автор: LI YONGZHENG, YANG WEIMIN, ZHONG SIQING, XU JUN, JIN WEILONG
Принадлежит:

The invention relates to the technical field of chemical reaction devices, and discloses a novel internal component and a fluidized bed reactor, the novel internal component comprises a guide vane group, the guide vane group comprises a first guide vane and a second guide vane, the first guide vane and the second guide vane are reversely inclined relative to the horizontal plane around a first horizontal axis and reversely inclined relative to the horizontal plane around a second horizontal axis, the first axis is perpendicular to the second axis, and the edges of the first guide vane and the second guide vane intersect at one point. According to the novel inner component formed by the two guide vanes which are relatively twisted and inclined, the guide vanes simultaneously incline around the first axis and the second axis, so that all parts of the main flow surface of the guide vanes have an upward movement trend, and an air cushion is difficult to form below the guide vanes; therefore ...

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Номер записи: 1
04-07-2023 дата публикации

Triaxial test soil sample dry-wet cycle test device capable of applying overlying load

Номер: CN116380621A
Автор: WANG CHUAN, YANG WEIMIN, MA CHUANYI, WANG SENWEI, ZHANG NING, TIAN CONG, ZHANG SHENGTAO, BAI YIFAN, ZHANG ZHIYUAN
Принадлежит:

The invention discloses a triaxial test soil sample dry-wet cycle test device capable of applying an overlying load. The triaxial test soil sample dry-wet cycle test device comprises a bracket, an overlying load applying device and a dry-wet cycle device, the bracket comprises a box body bracket, a box body bearing platform, a sensor base and a control panel; the overlying load applying device comprises an electric jack, a bearing plate, a connecting column and a loading ring, and the overlying load applying device is used for applying an overlying load in the dry-wet cycle process; the dry-wet circulation device comprises a sample preparation mold, a base ring and a water plugging device, and the dry-wet circulation device can control a dry-wet circulation path of a soil sample; the triaxial test soil sample can be subjected to overlying load applying and different-path dry-wet cycle processes, the application scenes are multiple, factors such as rainfall infiltration and groundwater capillary ...

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Номер записи: 2
03-01-2019 дата публикации

FULL-AUTOMATIC TRUE TRIAXIAL TUNNEL AND UNDERGROUND CONSTRUCTION MODEL TESTING SYSTEM

Номер: WO2019000677A1
Автор: LI, Shucai, YANG, Weimin, ZHOU, Zongqing, LI, Liping, SHI, Shaoshuai, WANG, Meixia, CHENG, Shuai, CHEN, Xuguang, GAO, Chenglu, LIU, Cong
Принадлежит:

A full-automatic true triaxial tunnel and an underground construction model testing system, comprising a triaxial loading device for loading a model test body (39), an automatic data acquiring and analyzing device, a power system, and a control system. The triaxial loading device comprises a test bed, a vertical loading system, a horizontal forward and backward loading system, and a horizontal leftward and rightward loading system; the vertical loading system, the horizontal forward and backward loading system, and the horizontal leftward and rightward loading system apply triaxial pressure to the model test body (39); the test bed has the effects of supporting, fixing, and providing counter-force; the automatic data acquiring and analyzing device comprises an optical fiber sensor, an optical fiber monitoring system, a micro pressure box, and a strain block embedded in the model test body (39), so that acquisition of multi-physical field information, such as model stress, displacement, ...

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Номер записи: 3
23-06-2004 дата публикации

合成吡啶和甲基吡啶的方法

Номер: CN0001506354A
Автор: YANG WEIMIN, SUN HONGMIN, WEIMIN YANG, HONGMIN SUN, 杨为民
Принадлежит:

The present invention is the preparation process of pyridine and methyl pyridine and aims at providing production process superior to available technology, which has low selectivity and low yield of products pyridine and methyl pyridine. The technological scheme of the present invention adopts ammonia, formaldehyde and acetaldehyde under gas phase as material and molecular sieve modified with water solution of strong alkali as catalyst. The present invention may be used in the industrial production of pyridine and methyl pyridine.

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Номер записи: 4
30-04-2020 дата публикации

SCM-18 ALUMINOPHOSPHATE MOLECULAR SIEVE, PREPARATION METHOD THEREFOR AND USE THEREOF

Номер: WO2020082944A1
Автор: YANG, Weimin, YUAN, Zhiqing, TENG, Jiawei, FU, Wenhua, LIU, Songlin
Принадлежит:

Provided are an SCM-18 aluminophosphate molecular sieve, a preparation method therefor and the use thereof. The molecular sieve has a schematic chemical composition of Al2O3·nP2O5 by mole, wherein n represents the molar ratio of phosphorus to aluminum, and is in the range of about 0.8-1.2. The preparation method therefor comprises mixing an aluminum source, a phosphorus source, an organic substance R and water in a proportion to obtain a synthetic mother liquor; crystallizing the synthetic mother liquor to obtain a precursor of the aluminophosphate molecular sieve; and calcining the precursor to obtain the aluminophosphate molecular sieve. The molecular sieve has a unique X-ray diffraction pattern and can be used as an adsorbent, a catalyst or a catalyst support.

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Номер записи: 5
02-04-2015 дата публикации

MOLECULAR SIEVE, MANUFACTURING METHOD THEREFOR, AND USES THEREOF

Номер: WO2015043114A1
Автор: YANG, Weimin, WANG, Zhendong, SUN, Hongmin, ZHANG, Bin, HUAN, Mingyao, SHEN, Zhenhao, XUE, Mingwei
Принадлежит:

Provided are a molecular sieve, particularly a molecular sieve provided with a dual-basis layer MWW topological skeleton structure, a manufacturing method therefor, and uses thereof. The manufacturing method comprises the steps: under a crystallization condition, enabling a first oxide source, a second oxide source, an alkali source, an organic template agent, an optional halogen source to be in contact with water, and optional calcining, the organic template agent being selected from a combination of a first organic template agent and a second organic template agent, the first organic template agent being selected from at least one of nitrogen-doped C5-15 cyclanes, and the second organic template agent being selected from at least one of nitrogen-doped aromatic hydrocarbon and NR4R5R6. Compared with an MCM-22 molecular sieve, the molecular sieve shows improved catalysis performance, good service life and regeneration performance, the manufacturing method is simple, the condition is moderate ...

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Номер записи: 6
21-04-2023 дата публикации

SCM-38 molecular sieve and preparation method thereof

Номер: CN115991488A
Автор: YANG WEIMIN, ZHAO SHENGLI, QIAO JIAN, YUAN ZHIQING, WANG ZHENDONG, FU WENHUA
Принадлежит:

The invention discloses an SCM-38 molecular sieve and a preparation method thereof. The SCM-38 molecular sieve is a novel molecular sieve, the chemical composition of the SCM-38 molecular sieve is that the molar ratio of SiO2 to Al2O3 to P2O5 is (0-0.1): (0.8-1.5): 1, the XRD spectrum of the SCM-38 molecular sieve comprises X-ray diffraction peaks appearing at the positions where 2 theta is 7.20 +/-0.1, 10.81 +/-0.1, 11.60 +/-0.1, 14.32 +/-0.1, 21.39 +/-0.1, 21.83 +/-0.1, 27.31 +/-0.1 and 28.72 +/-0.1, and the position where 2 theta is 7.20 +/-0.1 is the strongest peak. The SCM-38 molecular sieve provided by the invention can be applied to an adsorbent or a catalyst.

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Номер записи: 7
21-04-2023 дата публикации

SCM-40 molecular sieve and preparation method thereof

Номер: CN115991489A
Автор: YANG WEIMIN, ZHAO SHENGLI, QIAO JIAN, YUAN ZHIQING, WANG ZHENDONG, FU WENHUA
Принадлежит:

The invention discloses an SCM-40 molecular sieve and a preparation method thereof. The chemical composition of the SCM-40 molecular sieve is that the molar ratio of Al2O3 to P2O5 is (0.5-1.1): 1, the XRD spectrum of the SCM-40 molecular sieve comprises X-ray diffraction peaks appearing at the positions where 2 theta is 9.50 +/-0.1, 10.07 +/-0.1, 12.67 +/-0.1, 19.66 +/-0.1, 20.43 +/-0.1, 24.23 +/-0.1, 29.18 +/-0.1 and 30.69 +/-0.1, and the position where 2 theta is 9.50 +/-0.1 is the strongest peak. The SCM-40 molecular sieve provided by the invention has a special XRD diffraction peak, and can be applied to adsorbents or catalysts.

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Номер записи: 8
25-04-2023 дата публикации

Method for preparing bio-based toluene from methyl furan

Номер: CN116003202A
Автор: YANG WEIMIN, LEE SANG-JUNG, WANG ZHENDONG, LIU CHUANG, XU RUI
Принадлежит:

The present invention relates to the technical field of catalysis, particularly to a method for preparing bio-based toluene from methyl furan, the method comprises: in the presence of an optional organic solvent, methyl furan and ethylene are subjected to a contact reaction, the catalyst contains an A-SCM-X molecular sieve, A in the A-SCM-X molecular sieve is selected from at least one of Sn, Zr and Ti, and X is 14 or 15. By adopting the A-SCM-X molecular sieve as the catalyst, the catalyst has outstanding cycling stability, and the catalyst is not inactivated after being cyclically used for four times.

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Номер записи: 9
30-08-2012 дата публикации

METHOD FOR PRODUCING ETHYLENE GLYCOL THROUGH FLUIDIZED BED CATALYTIC REACTION OF OXALATE

Номер: WO2012113267A1
Автор: YANG, Weimin, LIU, Juntao, WANG, Wanmin, KUAI, Jun
Принадлежит:

Provided is a method for producing ethylene glycol through fluidized bed catalytic reaction of an oxalate, to solve the problem of low selectivity for the hydrogenation product ethylene glycol in the prior art. In the method, a fluidized bed reactor is employed, and an oxalate is used as a raw material, the raw material contacts a fluidized bed catalyst, to produce an ethylene glycol containing effluent, wherein the fluidized bed catalyst comprises, based on parts by weight, a) about 5-80 parts of copper and an oxide thereof, b) about 10-90 parts of at least one carrier of silica, a molecular sieve and alumina, and c) about 0.01-30 parts of metal elements bismuth and tungsten or an oxide thereof, or metal elements cerium and niobium or an oxide thereof. The method improves the product selectivity, and is thus applicable to industrial production of ethylene glycol.

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Номер записи: 10
02-05-2019 дата публикации

MOLECULAR SIEVE COMPOSITION, MANUFACTURING METHOD THEREFOR AND USE THEREOF

Номер: WO2019080832A1
Автор: WANG, Yangdong, ZHOU, Haibo, YANG, Weimin, LIU, Su, LIU, Chang, ZHAO, Yu, LIU, Hongxing, LU, Xian
Принадлежит:

A molecular sieve composition, a manufacturing method therefor and a use thereof in the production of low-carbon olefin. The molecular sieve composition comprises a phosphorus aluminum molecular sieve and a CO adsorptivity component, the two existing independent from one another. Using the molecular sieve composition as a catalyst exhibits the advantages of high low-carbon olefin selectivity and so on when used for manufacturing low-carbon olefin by using syntgas as a raw material.

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Номер записи: 11
10-01-2019 дата публикации

FLUIDIZED-BED CATALYST APPLICABLE TO HALOARYLNITRILE PRODUCTION, AND PREPARATION AND APPLICATION THEREOF

Номер: WO2019007239A1
Автор: YANG, Weimin, GU, Longqin, ZENG, Wei, CHEN, Liang, XU, Junfeng
Принадлежит:

A fluidized-bed catalyst suitable for producing haloarylnitrile, and preparation and application thereof. The catalyst comprises an active ingredient and a carrier. The active ingredient is a complex consisting of VPaCrbAcMdOx by atomic ratio, wherein A represents at least one metal selected from between an alkali metal and an alkaline earth metal; M represents at least one selected from among Ti, Zr, Hf, La, Ce, Nb, Mo, W, Co, Zn, Fe, Ni, B, Sb, Bi, As, Ga, Ge, Sn, and In. In an XRD pattern of the catalyst, there is a diffraction peak when 2θ=27.8±0.5°and 2θ=13.8±0.5°, and the ratio of the peak height (I1) of the diffraction peak when 2θ=27.8±0.5°to the peak height (I2) of the diffraction peak when 2θ=13.8±0.5°is equal to 3.5 to 6, i.e., I1:I2=3.5-6. The catalyst shows good ammonia-oxidizing activity, and can achieve high reaction conversion rate and selectivity without using a dangerous chemical, bromoethane, when applied to haloarylnitrile preparation.

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Номер записи: 12
06-06-2023 дата публикации

Charging method data denoising method and system in strong interference environment

Номер: CN116224455A
Автор: SUN HUAIFENG, ZHOU CHANGYU, YANG YANG, JOO YU-JIN, LIU SHANGBIN, YANG WEIMIN
Принадлежит:

The invention relates to the technical field of geophysical electromagnetic exploration, and discloses a charging method data denoising method and system in a strong interference environment, and the method comprises the steps: obtaining transmission data transmitted by a transmitting end and response data received by a receiving end; determining the position range of the target potential difference in the main period according to the time difference between the starting moments of the two; for the response data, dividing the response data into a plurality of main period segments according to the main period length of a transmitted data waveform, superposing the plurality of main period segments and calculating an average value to obtain a superposed main period segment; according to a step detection function, step identification is carried out on the superposed main period segment, and the position of a target potential difference step is determined in combination with the position range ...

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Номер записи: 13
30-04-2020 дата публикации

SILICON-PHOSPHO-ALUMINUM MOLECULAR SIEVE, PREPARATION METHOD AND APPLICATION THEREOF

Номер: WO2020082943A1
Автор: YANG, Weimin, YUAN, Zhiqing, TENG, Jiawei, FU, Wenhua, LIU, Songlin
Принадлежит:

Provided are a novel silicon-phospho-aluminum molecular sieve, preparation method and application thereof. The molecular sieve has a schematic chemical composition in molar ratio mSiO2·Al2O3·nP2O5, wherein m represents the ratio of silicon to aluminum and is in the range of about 0.005-0.15, and n represents the ratio of phosphorus to aluminum, and is in the range of about 0.7-1.1. The preparation method thereof comprises mixing a silicon source, an aluminum source, a phosphorus source, an organic substance R and water in proportion to obtain a synthetic mother liquor; crystallizing the synthetic mother liquor to obtain a molecular sieve precursor; calcining the precursor to obtain a molecular sieve. The molecular sieve has a unique X-ray diffraction pattern and can be used as an adsorbent, a catalyst or a catalyst support.

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Номер записи: 14
15-09-2016 дата публикации

TUNNEL BORING MACHINE ROCK BREAKING SEISMIC SOURCE AND ACTIVE SOURCE THREE-DIMENSIONAL SEISMIC COMBINED ADVANCED DETECTION SYSTEM

Номер: WO2016141630A1
Автор: LI, Shucai, LIU, Bin, XU, Xinji, SONG, Jie, NIE, Lichao, YANG, Lei, LIN, Chunjin, YANG, Weimin
Принадлежит:

A tunnel boring machine rock breaking seismic source and active source three-dimensional seismic combined advanced detection system comprises a shock system (1), receiving sensors and supporting devices (4) thereof, a rock breaking seismic source sensor array (20), noise sensors, a control system, and a multichannel seismic wave data collection instrument. The shock system (1) comprises a working plane seismic source (2) and a sidewall seismic source (3). The working plane seismic source (2) is disposed on a boring machine cutter head (5). The sidewall seismic source (3) is disposed on a boring machine main shaft (6). The cutter head (5) is disposed on the boring machine main shaft (6). The middle section of the boring machine main shaft (6) is provided with three groups of the receiving sensors and the supporting devices (4) thereof in a shape of ring by using the middle section as a center. The receiving sensors and the supporting devices (4) thereof are separately corresponding to a ...

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Номер записи: 15
20-12-2018 дата публикации

MOLECULAR SIEVE SCM-15, SYNTHESIS METHOD THEREFOR AND USE THEREOF

Номер: WO2018227850A1
Автор: YANG, Weimin, WANG, Zhendong, LUO, Yi, SUN, Hongmin, ZHANG, Bin
Принадлежит:

Disclosed are a molecular sieve SCM-15, a synthesis method therefor and the use thereof. The molecular sieve has a schematic chemical composition as shown in formula "SiO2·GeO2", wherein the molar ratio of silicon to germanium in SiO2/GeO2 is ≥ 1. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

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Номер записи: 16
11-09-2015 дата публикации

USE OF FSK IN PREVENTING AND TREATING CHRONIC OBSTRUCTIVE PULMONARY DISEASE

Номер: WO2015131655A1
Автор: YANG, Weimin, WANG, Lei, WENG, Zhiying, XU, Yunlong, LIU, Xia, DU, Xiaohua, PENG, Peihua, WANG, Youlan, QING, Chen
Принадлежит:

Provided in the invention is a novel use of the compound forskolin (FSK) in preventing and treating chronic obstructive pulmonary disease (COPD). The FSK can be independently used as an effective component for drug use or health-care use, and also can be prepared into tablets, buccal tablets, capsules, granules, oral solutions, injections, aerosols, emplastrum and the like with other components free from repulsive interactions. The present invention adopts administration methods such as FSK oral intragastric administration and intraperitoneal injections and the like, and experimental research has been performed on a cigarette smoke inhalation induction mouse COPD model and an elastase induction mouse COPD model to prove that FSK has an obvious preventative/treatment effect on the cigarette smoke inhalation induction COPD and the elastase induction COPD. Furthermore, the acute toxicity and long term toxicity tests of FSK prove that the present invention is safe, the dosage of an adult is ...

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Номер записи: 17
06-02-2020 дата публикации

NANOCAGED CATALYST, PREPARATION METHOD, AND APPLICATION

Номер: WO2020024923A1
Автор: TAO, Guiju, YANG, Weimin, HE, Wenjun, YU, Fengping, JIN, Shaoqing
Принадлежит:

A nanocaged catalyst, a preparation method, and an application thereof. The formula of the catalyst is: NC-m[M(Salen1)X]-n[M'(Salen2)], where NC is a material having a nanocage structure, and M(Salen1)X and M'(Salen2) are each active centers; each M that occurs is independently selected from a Co ion, an Fe ion, a Ga ion, an Al ion, a Cr ion, and a mixture thereof; each M' that occurs is independently selected from a Cu ion, an Ni ion, and a mixture thereof; m is within a range of 0-100; n is within a range of 0-100; it is a condition that at least one of m and n is not equal to 0; each Salen1 and Salen2 that occurs is independently a Schiff base derivative; and X is an axial anion selected from substituted or unsubstituted acetate, substituted or unsubstituted benzenesulfonate, substituted or unsubstituted benzoate, F-, Cl-, Br-，I-，SbF6-，PF6-，BF4-, and a mixture thereof.

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Номер записи: 18
17-09-2015 дата публикации

APPLICATION OF ISOFORSKOLIN IN PREVENTING AND TREATING CHRONIC OBSTRUCTIVE PULMONARY DISEASE

Номер: WO2015135372A1
Автор: YANG, Weimin, WANG, Lei, WENG, Zhiying, WANG, Tao, XU, Yunlong, LIU, Xia, WANG, Peng, ZHANG, Ling, QING, Chen
Принадлежит:

The present invention provides a new application of isoforskolin (ISOF) as a compound in preventing and treating a chronic obstructive pulmonary disease (COPD). The ISOF can be independently used as a pharmaceutical or health-care effective component and can also be used for preparing a tablet, a buccal tablet, a capsule, a granule, an oral solution, an injection, an aerosol, an emplastrum and the like with other components that do not have a repulsive effect together. In this invention, administration modes, such as ISOF oral and intragastric administration and intraperitoneal injection, are used, experimental studies are carried out on two animal models of inducing mice COPD by inhaling elastinase and cigarette smoke, and it is proved that the ISOF has obvious prevention and treatment effects on the COPD induced by inhaling the elastinase and the cigarette smoke. In addition, the ISOF of the present invention proves to be safe according to results of tests of acute toxicity and long-term ...

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Номер записи: 19
30-08-2012 дата публикации

ETHYLENE GLYCOL PREPARATION METHOD

Номер: WO2012113268A1
Автор: LIU, Juntao, YANG, Weimin, LI, Lei, WANG, Wanmin, ZHANG, Linna, SONG, Haifeng
Принадлежит:

The present invention relates to an ethylene glycol preparation method. Oxalate is used as raw material, and copper or copper oxides are used as catalyst. Under the conditions of the reaction temperature being approximately at 170°C to 270°C, the weight space velocity of oxalate being approximately 0.2 to 5 hr-1, the molar ratio of hydrogen to ester being approximately 40:1 to 200:1, the reaction pressure being approximately 1.5 to 10 MPa, the raw material contacts the catalyst in a reactor to produce an effluent comprising ethylene glycol. The reactor is an array tube reactor having multiple heat-exchanging zones and a structure of an outer tube sleeving an inner tube for catalyst heat exchange.

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Номер записи: 20
15-12-2011 дата публикации

PROCESS FOR PREPARING OXALATE BY CARBON MONOXIDE GAS-PHASE METHOD

Номер: WO2011153825A1
Автор: YANG, Weimin, LIU, Juntao, WANG, Wanmin, LI, Lei
Принадлежит:

Disclosed is a process for preparing oxalate by carbon monoxide gas-phase method, which includes the following steps: a) introducing a nitrite, water and an inorganic acid into a reactor I firstly, and separating the produced effluent to obtain a effluent II of nitric oxide; b) introducing the effluent II of nitric oxide, C1-C4 alkanol and oxygen into a reactor II to react, and separating the produced effluent to obtain a effluent IV containing C1-C4 alkyl nitrite; c) introducing the effluent IV containing C1-C4 alkyl nitrite and a stream of carbon monoxide gas into a coupling reactor to generate a effluent VI containing nitric oxide, wherein the reactor I and /or the reactor II are (is) a rotary super-gravity reactor.

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Номер записи: 21
20-12-2018 дата публикации

MOLECULAR SIEVE SCM-14, SYNTHESIS METHOD THEREFOR AND USE THEREOF

Номер: WO2018227849A1
Автор: YANG, Weimin, WANG, Zhendong, LUO, Yi, SUN, Hongmin, ZHANG, Bin
Принадлежит:

Disclosed are a molecular sieve SCM-14, a synthesis method therefor and the use thereof. The molecular sieve has the schematic chemical composition as shown in the formula "SiO2·1/nGeO2" or the formula "kF·mQ·SiO2·1/nGeO2·pH2O", wherein the molar ratio (n) of silicon to germanium is ≤ 30, and the definitions of other values and symbols are the same as in the description. The molecular sieve has unique XRD diffraction data and can be used as an adsorbent or a catalyst.

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Номер записи: 22
25-04-2023 дата публикации

Preparation method of bio-based toluene

Номер: CN116003201A
Автор: YANG WEIMIN, LEE SANG-JUNG, WANG ZHENDONG, FENG XINQIANG, QU HONGYU
Принадлежит:

The present invention relates to the field of catalysis, particularly to a bio-based toluene preparation method, which comprises that methyl furan and ethylene are subjected to a contact reaction in the presence of an optional organic solvent in the presence of a catalyst, and the catalyst contains a solid acid. According to the preparation method of the bio-based toluene, provided by the invention, methyl furan and ethylene can be efficiently converted into toluene under mild reaction conditions, and the conversion rate and the selectivity of the product toluene are very high. Meanwhile, the content of key impurities (such as polyalkyl toluene and dimer) in the obtained product is extremely low, the separation energy consumption is greatly reduced, and the catalyst has the characteristics of outstanding recycling stability and the like. In addition, the zinc-based solid acid is adopted as the catalyst and has very high stability, and the performance of the catalyst is not obviously changed ...

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Номер записи: 23
08-08-2023 дата публикации

Method for generating discrete element model of jointed rock mass containing crossed closed cracks

Номер: CN116562048A
Автор: MENG QINGXIANG, ZHANG QIANG, DING YU, YANG WEIMIN, SHI PENGCHENG, CHEN JIAMIN, SONG HANGTIAN, XUE HAOYU, ZHU CHUN
Принадлежит:

The invention discloses a method for generating a discrete element model of jointed rock mass containing crossed closed fractures, which comprises the following steps of: generating two groups of closed fractures with different inclination angles according to set parameters, and superposing the two groups of closed fractures into a group of crossed closed fractures; dividing grids by taking a frame and a closed crack as boundary conditions; and finally, finding out grid units on two sides of the crossed and closed crack through geometric position information of the crossed and closed crack, a grid model file and a running script, grouping the grid units, endowing the grid units with weak contact parameters, and obtaining a jointed rock mass numerical simulation model with the crossed and closed crack. The numerical simulation model for the jointed rock mass with the crossed and closed cracks is more practical, the length, the angle and the number of the closed cracks, the included angle ...

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Номер записи: 24
23-06-2004 дата публикации

吡啶和甲基吡啶的制备方法

Номер: CN0001506353A
Автор: YANG WEIMIN, SUN HONGMIN, WEIMIN YANG, HONGMIN SUN, 杨为民
Принадлежит:

The present invention is the preparation process of pyridine and methyl pyridine and aims at providing production process superior to available technology, which has low selectivity and low yield of products pyridine and methyl pyridine. The technological scheme of the present invention adopts ammonia, formaldehyde and acetaldehyde under gas phase as material and molecular sieve modified with organic solution of silicon compound and/or germanium compound as catalyst. The present invention may be used in the industrial production of pyridine and methyl pyridine.

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Номер записи: 25
25-04-2023 дата публикации

Preparation method of p-xylene

Номер: CN116003200A
Автор: YANG WEIMIN, LEE SANG-JUNG, WANG ZHENDONG, HAN XIAO, MA DUOZHENG
Принадлежит:

The present invention relates to the field of catalysis, particularly to a p-xylene preparation method, which comprises that 2, 5-dimethylfuran and/or 2, 5-hexanedione is adopted as a raw material, the catalyst contains an SCM-36 molecular sieve, and the raw material and ethylene are subjected to a contact reaction in the presence of an optional organic solvent to prepare p-xylene. According to the method, the SCM-36 molecular sieve is adopted as the catalyst, 2, 5-dimethylfuran and/or 2, 5-hexanedione can be efficiently converted into p-xylene under mild reaction conditions, and the conversion rate and the selectivity of the product p-xylene are very high. Meanwhile, the content of key impurities (such as polyalkyl ethylbenzene, 2, 5-hexanedione and 2-cyclopentenone) in the obtained product is extremely low, and the separation energy consumption is greatly reduced. In addition, the SCM-36 molecular sieve is adopted as the catalyst and has very high stability, and the performance of the ...

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Номер записи: 26
28-04-2023 дата публикации

Catalyst for producing cyclohexylbenzene as well as preparation method and application of catalyst

Номер: CN116020541A
Автор: LAN DAWEI, YANG WEIMIN, WANG ZHENDONG, LIANG JUN, LEE SANG-JUNG, WANG WENNIAN
Принадлежит:

The invention discloses a catalyst for producing cyclohexylbenzene, a preparation method of the catalyst, and application of the catalyst in production of cyclohexylbenzene through benzene hydroalkylation. Wherein the catalyst has a schematic chemical composition as shown in the formula of'xM * ySiO2.zAl2O3 ', and the formula of the catalyst is shown in the description. Wherein M is a metal element and is selected from one or more of ruthenium, platinum, palladium, copper and nickel; in the chemical composition, x/y is more than or equal to 0.001 and less than or equal to 0.02, and y/z is more than or equal to 8 and less than or equal to 80. The catalyst provided by the invention is used for producing cyclohexylbenzene through benzene hydroalkylation, and has the characteristics of high benzene conversion rate, good product selectivity and the like.

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Номер записи: 27
14-04-2023 дата публикации

Whole crystal MWW structure titanium silicalite molecular sieve catalyst and preparation method and application thereof

Номер: CN115957808A
Автор: JIN SHAOQING, YANG WEIMIN, TANG ZHIMOU, SUN HONGMIN, FAN XUEYAN
Принадлежит:

The invention discloses a titanium silicalite molecular sieve catalyst with a total crystallization MWW structure as well as a preparation method and application of the titanium silicalite molecular sieve catalyst. The ultraviolet Raman spectrum of the total crystal MWW structure titanium silicalite molecular sieve catalyst has spectrum peaks at the positions of 343 +/-6 cm <-1 >, 485 +/-6 cm <-1 >, 529 +/-6 cm <-1 > and 1094 +/-6 cm <-1 >. The molecular sieve catalyst is used in olefin epoxidation reaction, and has the characteristics of high catalytic activity, high selectivity and good stability.

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Номер записи: 28
16-05-2023 дата публикации

Artificial source electromagnetic exploration signal processing method and system for urban power frequency interference

Номер: CN116125545A
Автор: SUN HUAIFENG, ZHANG HENG, YANG YANG, JOO YU-JIN, LIU SHANGBIN, YANG WEIMIN
Принадлежит:

The invention relates to the technical field of geophysical electromagnetic exploration, and discloses a personnel source electromagnetic exploration signal processing method and system for urban power frequency interference. The method comprises the following steps: acquiring a to-be-processed signal comprising an exploration signal and a power frequency signal; fourier transform is carried out, a frequency spectrum only containing noise is obtained based on the characteristic that frequency spectrum leakage is in conjugate symmetry with respect to the frequency of the power frequency signal, inverse Fourier transform is carried out, and then envelope processing is carried out; carrying out normalization processing on a power frequency signal part in the to-be-processed signal based on the envelope line, and then carrying out Fourier transform; the normalized frequency spectrum is processed, power frequency signals are removed, and processed time domain signals are obtained through Fourier ...

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Номер записи: 29
14-04-2023 дата публикации

SCM-36 molecular sieves, methods of manufacture and uses thereof

Номер: CN115959681A
Автор: YANG WEIMIN, WANG ZHENDONG, MA DUOZHENG, LIU SONGLIN, LEE SANG-JUNG, YUAN ZHIQING, LIU CHUANG
Принадлежит:

The invention discloses an SCM-36 molecular sieve as well as a preparation method and application thereof. The molecular sieve has a schematic chemical composition "mSiO2.nAl2O3", wherein m/n > = 5. The molecular sieve has unique XRD diffraction data, is a novel molecular sieve, and can be used as an adsorbent or a catalyst for conversion of organic compounds.

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Номер записи: 30
04-04-2023 дата публикации

Limestone similar material with seepage-chemical-vibration coupling characteristic and preparation method thereof

Номер: CN115893938A
Автор: ZHENG ZHI, YE XIN, SU GUOSHAO, FAN QIUYAN, HUANG XIAOHUA, YANG WEIMIN, WANG ZHECHAO, ZHANG QIANG, WANG YUJIE, XU WEIYA
Принадлежит:

The invention belongs to the technical field of engineering geologic model tests, and discloses a limestone similar material with seepage-chemical-vibration coupling characteristics and a preparation method, the similar material comprises the following components: aggregate: calcite sand, clay powder and dolomite powder; cementing agents: cement and gypsum; the additives comprise borax, a water reducing agent, nano aluminum oxide and water. According to the invention, a seepage-chemical-vibration coupling similarity theory is provided, similar material aggregate types are determined by considering limestone component information, aggregate grain composition is determined according to limestone mineral grain composition, and the similarity ratio of sample forming pressure to permeability coefficients is determined by considering limestone occurrence ground stress and a sedimentary water environment. The formation environment of limestone is restored to the maximum extent, and the similarity ...

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Номер записи: 31
14-04-2023 дата публикации

Supported transition metal phosphide catalyst as well as preparation method and application thereof

Номер: CN115957784A
Автор: WANG JIAN, YANG WEIMIN, ZHU JUNHUA, CHEN LIANGFENG, WANG LIMIN
Принадлежит:

The invention discloses a supported transition metal phosphide catalyst as well as a preparation method and application thereof. The supported transition metal phosphide catalyst comprises: (1) a carrier; (2) the active component is transition metal phosphide; wherein the particle size of the nanoparticles of the transition metal phosphide is 5-30 nm. The catalyst provided by the invention is used in the hydrodesulfurization reaction of pyrolysis gasoline, and has the characteristics of high activity and long service life.

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Номер записи: 32