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公开(公告)号：US20240318009A1
公开(公告)日：2024-09-26
申请号：US18574490
申请日：2021-08-31
发明人： Jie YANG , Guanjun LOU
IPC分类号： C09D5/03 , B29B7/00 , B29B7/36 , B29K21/00 , B29K23/00 , B29K25/00 , B29K33/00 , B29K69/00 , B29K77/00 , B29K105/16 , B29K505/02 , B29K507/00 , B33Y70/00 , C08J3/20 , C08K3/22 , C08K3/34 , C08K3/36
CPC分类号： C09D5/033 , B29B7/007 , B29B7/36 , C08J3/203 , C08K3/22 , C08K3/34 , C08K3/346 , C08K3/36 , B29K2021/003 , B29K2023/00 , B29K2025/06 , B29K2033/08 , B29K2069/00 , B29K2077/00 , B29K2105/162 , B29K2505/02 , B29K2507/00 , B33Y70/00 , C08J2300/22 , C08J2323/12 , C08J2375/04 , C08K2003/2227 , C08K2003/2241 , C08K2201/011
摘要： Disclosed herein are a polymer composite, a preparation method therefor and an application thereof. The polymer composite comprises the following components in parts by weight: 100 parts polymer powder, 0.1-3 parts nanoparticle A, and 0.05-1.5 parts nanoparticle B. The particle size of nanoparticle A is smaller than that of nanoparticle B, and the mass ratio of nanoparticle A to nanoparticle B is (1-9):1. The small-particle size and large-particle size nanoparticles used in the present application are compounded in a specific ratio, and the two act synergistically as flow agents for the polymer powder, so that the polymer composite has excellent fluidity, permeability and high temperature stability.
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公开(公告)号：US12076702B2
公开(公告)日：2024-09-03
申请号：US17288708
申请日：2019-05-10
发明人： Peng Liu , Xican Sun , Faming Zhu , Zhenxia Cong , Xiaofei Qiao
IPC分类号： B01J19/24 , B01J19/00 , C07C407/00
CPC分类号： B01J19/245 , B01J19/0053 , B01J19/006 , C07C407/00 , B01J2219/0004 , C07C407/00 , C07C409/08
摘要： Disclosed are a device and method for oxidizing an organic substance, particularly a method for preparing ethylbenzene hydroperoxide by reacting ethylbenzene with an oxygen-containing gas. The device comprises a vertical bubbling reactor (1) and a horizontal bubbling reactor (11) connected to a reaction product outlet of the vertical bubbling reactor (1), wherein the horizontal bubbling reactor (11) is internally provided with a plurality of reaction compartments (21) which are arranged along the axial direction thereof, and a liquid phase channel (22) is provided between adjacent reaction compartments (21).
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公开(公告)号：US11939280B2
公开(公告)日：2024-03-26
申请号：US17295369
申请日：2018-12-25
发明人： Yong Yu , Yonghua Shang , Lei Zhao , Wenbin Li , Ye Sun , Wei He , Xuelei Cui , Jingxu Wang , Degang Liu , Yuan Li
IPC分类号： C07D263/10 , B01J25/00 , C07C209/48 , C07C253/10 , C07C263/10
CPC分类号： C07C263/10 , B01J25/00 , C07C209/48 , C07C253/10 , C07C2601/16
摘要： A method for preparing isophorone diisocyanate by (1) reacting isophorone with hydrogen cyanide in the presence of a catalyst to obtain isophorone nitrile; (2) reacting the isophorone nitrile obtained in step (1) with ammonia gas and hydrogen in the presence of a catalyst to obtain isophorone diamine; and (3) subjecting the isophorone diamine to a phosgenation reaction to obtain the isophorone diisocyanate, wherein the content of impurities containing a secondary amine group in the isophorone diamine that undergoes the phosgenation reaction in step (3) is ≤0.5 wt. The method reduces the content of hydrolyzed chlorine in the isophorone diisocyanate product, improves the yellowing resistance of the product, and the harm due to presence of hydrolyzed chlorine in the product is reduced.
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公开(公告)号：US11814339B2
公开(公告)日：2023-11-14
申请号：US17295806
申请日：2018-12-26
发明人： Weiqi Hua , Tonghe Li , Yonghua Shang , Shuchang Sun , Jingxu Wang , Jinping Han , Qiang Li , Wenbin Li , Jing Li , Pengfei Wang , Yuan Li
IPC分类号： C07C263/10 , C07C265/06
CPC分类号： C07C263/10 , C07C265/06
摘要： A method for preparing an isocyanate in a gaseous phase by feeding, in the presence or absence of an inert gas, an amine-containing gas stream and a phosgene-containing gas stream into a reaction region, allowing the amine and the phosgene to contact in gaseous forms and undergo a phosgenation reaction in the reaction region, thus preparing the target isocyanate in a gaseous form in the reaction region. The phosgene-containing stream is subjected to preheating and warming before being fed into the reaction region, and the phosgene-containing stream comprises a substance A at a mass fraction of
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公开(公告)号：US11780954B2
公开(公告)日：2023-10-10
申请号：US17288834
申请日：2018-12-26
发明人： Fuguo Li , Yang Liu , Changxun Ju , Naihua Jiang , Bin Liu , Chengqun Qin , Lunpeng Wang
IPC分类号： C08F212/08 , C08F283/06 , C08F290/06 , C08G18/16 , C08G18/18 , C08G18/22 , C08G18/32 , C08G18/40 , C08G18/48 , C08G18/63 , C08G18/66 , C08G18/76 , C08G65/332 , C08J9/12
CPC分类号： C08G18/632 , C08F283/06 , C08G18/3275 , C08G18/4072 , C08G18/485 , C08G18/636 , C08G18/6688 , C08G18/7671 , C08J9/125 , C08G2110/0083 , C08J2203/10 , C08J2375/12
摘要： Provided are a modified polyether polyol and the use thereof in polyurethane foam materials. The method for preparing a modified polyether polyol comprises the following steps: 1) reacting a compound A with a polyether polyol, wherein the compound A is an anhydride and/or dicarboxylic acid compound containing a polymerizable double bond, preferably selected from one or two of maleic anhydride and itaconic anhydride, preferably maleic anhydride; and 2) reacting the product obtained in step 1) with an epoxy compound containing a polymerizable double bond in the presence of a catalyst, in order to prepare the modified polyether polyol. The modified polyether polyol obtained by means of the preparation method has more active sites, uses the polymerizable double bond for blocking, is used as a dispersion stabilizer for the synthesis of copolymer polyols, and has the characteristics of a better dispersion stability, filterability and a low viscosity.
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公开(公告)号：US20230151134A1
公开(公告)日：2023-05-18
申请号：US17995384
申请日：2020-04-03
发明人： Fuguo LI , Yang LIU , Ming JIANG , Chengqun QIN , Shiqiang FANG
IPC分类号： C08F283/06 , B01J19/24 , C08G18/65
CPC分类号： C08F283/06 , B01J19/2465 , C08G18/65 , B01J2219/00105
摘要： A reaction system for preparing polymer polyol and a method for preparing polymer polyol. The reaction system comprises a reactor, a first circulation unit, a second circulation unit, and a flow direction switching unit, wherein the reaction cavity of the reactor is divided into a first reaction chamber and a second reaction chamber by a partition plate, and the top of the partition plate is provided with an overflow port to communicate the first reaction chamber and the second reaction chamber with each other; the first circulation unit enables the material in the first reaction chamber to circulate between the discharge port of the first reaction chamber and the feed port of the first reaction chamber; the second circulation unit enables the material in the second reaction chamber to circulate between the discharge port of the second reaction chamber and the feed port of the second reaction chamber. The polymer polyol prepared by the reaction system has a low-viscosity effect, and by using the polymer polyol prepared by the method, a polyurethane foam having excellent mechanical properties and high hardness can be obtained.
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公开(公告)号：US20230043867A1
公开(公告)日：2023-02-09
申请号：US17784015
申请日：2019-12-09
发明人： Jing Dong , Lei Yu , Yongzhen Zhang , Yuan Li
摘要： A preparation method for optically active citronellal, which can obviously enhance the catalytic stability of an optically active transition metal catalyst for asymmetric hydrogenation of homogeneous catalysis and thereby achieve higher turnover numbers. In the preparation method for optically active citronellal, a substrate is subjected to an asymmetric hydrogenation reaction in the presence of the transition metal catalyst to generate the optically active citronellal, wherein the transition metal catalyst is obtained by reacting a transition metal compound with an optically active ligand containing two phosphorus atoms, and the raw material of the substrate is one of neral and geranial or a combination thereof to control the hydroxyl value to be less than or equal to 6 mgKOH/g and/or the iron content to be less than or equal to 50 ppm in the raw material of the substrate for the asymmetric hydrogenation reaction.
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公开(公告)号：US20230018924A1
公开(公告)日：2023-01-19
申请号：US17784879
申请日：2019-12-23
发明人： Qiang HAN , Qinhua ZHANG , Ning MA , Yibing ZHAO , Shuangyi SUN , Bo LIU , Yifeng SUN
摘要： Disclosed in the present invention are ABS rubber powder with a low impurity content, a preparation method therefor, and an ABS resin. The ABS rubber powder is treated by using the following steps: washing the ABS rubber powder with a washing solution I, and monitoring the content of soluble organic carbon in the ABS rubber powder until the content of soluble organic carbon in the ABS rubber powder is less than or equal to 9000 ppm, so as to obtain the ABS rubber powder with the low impurity content. In the present invention, by controlling the content of soluble organic carbon or the contents of soluble organic carbon and iron ions in the ABS powder, the ABS resin with a low yellow index of less than or equal to 18 is obtained.
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公开(公告)号：US20220305479A1
公开(公告)日：2022-09-29
申请号：US17291250
申请日：2020-01-14
发明人： Lei WANG , Tongji WANG , Fei YE , Kang SUN , Naibo CHU , Qiankun JIAO , Yuan LI
摘要： Provided are a preparation method for a propylene epoxidation catalyst, and a use thereof. During the preparation, an alkoxide solution of a prepared active component and a silica gel support are mixed, then a rotary evaporation treatment is performed on the mixture to remove a low-carbon alcohol to obtain a catalyst precursor, and then the obtained catalyst precursor is subjected to calcination and silylation treatments to obtain the propylene epoxidation catalyst. The catalyst is prepared in a simple process, can be applied to the chemical process of preparing propylene oxide by propylene epoxidation, has high average selectivity to propylene oxide, and has industrial application prospect.
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公开(公告)号：US20220227915A1
公开(公告)日：2022-07-21
申请号：US17608393
申请日：2020-07-20
发明人： Jianfeng LI , Yonghua SHANG , Qian WU , Fulin ZHU , Peng WANG , Hao CHEN , Peimeng SHI , Weiqi HUA , Yuan LI
摘要： Preparation method for a polyurethane optical resin and applications thereof. The preparation method for the polyurethane optical resin comprises: a raw material composition comprising isocyanate and a polythiol compound undergoes a polymerization to produce the polyurethane optical resin. The turbidity value of the isocyanate used in the raw material composition is controlled at ≤2 NTU. The polyurethane optical resin produced is applicable in manufacturing optical products.
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