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公开(公告)号：US11739037B1
公开(公告)日：2023-08-29
申请号：US17991816
申请日：2022-11-21
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Jung-Tsu Wu
CPC分类号： C07C29/20 , B01J8/10 , B01J23/464 , C07C29/20 , C07C35/08
摘要： A method for manufacturing nonylcyclohexanol is provided. The method includes steps as follows: adding a liquid phase reactant into a reactor, and the liquid phase reactant includes a molten nonylphenol and a catalyst; introducing a gas phase reactant to maintain a pressure of the gas phase reactant to be from 36.5 bar to 70 bar, and the gas phase reactant consists of hydrogen; rotating a hollow stirring shaft of the reactor at a temperature of from 100° C. to 130° C. so that the gas phase reactant is transported through a channel formed in the hollow stirring shaft into the liquid phase reactant for carrying out a reaction; obtaining a product that contains nonylcyclohexanol. A conversion rate of the nonylcyclohexanol is higher than or equal to 99.0%.
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公开(公告)号：US12116340B2
公开(公告)日：2024-10-15
申请号：US18069943
申请日：2022-12-21
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Jung-Tsu Wu
IPC分类号： C07C51/56 , C07D307/89
CPC分类号： C07C51/56 , C07D307/89
摘要： A method for manufacturing methyltetrahydrophthalic anhydride is provided, which includes steps as follows. Maleic anhydride is added into a reactor. Piperylene is added into the reactor, so that the piperylene and the maleic anhydride undergo a first addition reaction. When a conversion rate of the maleic anhydride is more than 25%, the first addition reaction is completed. Isoprene is added into the reactor, so that the isoprene and the maleic anhydride undergo a second addition reaction to obtain a methyltetrahydrophthalic anhydride product. The methyltetrahydrophthalic anhydride product contains 3-methyltetrahydrophthalic anhydride and 4-methyltetrahydrophthalic anhydride.
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3.发明授权公开(公告)号：US10781159B2
公开(公告)日：2020-09-22
申请号：US16656883
申请日：2019-10-18
IPC分类号： C07C67/303 , B01J23/46 , B01J21/04 , B01J8/10 , B01J8/08
摘要： A hydrogenation method for increasing the yield of cyclohexane-1,4-dicarboxylic acid diisooctyl ester is provided. The hydrogenation method uses a hydrogenating reaction tank, which is equipped with a hollow-shaft gas-introducing mixer having air-extracting, air-exhausting and mixing functions, to allow hydrogen gas to be uniformly dispersed in a reaction solution. A ruthenium-on-alumina (Ru/Al2O3) hydrogenation catalyst can be used for carrying out a hydrogenation reaction under gentle conditions. Therefore, the hydrogenation catalyst can be used in a reduced amount, the risk of side reaction(s) can be reduced, and the yield of cyclohexane-1,4-dicarboxylic acid diisooctyl ester can reach at least 99% with a cis isomer proportion of at least 85.0%. The hydrogenation method shows extremely high economic benefit.
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4.发明授权公开(公告)号：US09688838B1
公开(公告)日：2017-06-27
申请号：US15155104
申请日：2016-05-16
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Hsun-Min Lin
CPC分类号： C08K5/12 , C07C67/08 , C08K2201/014 , C07C69/82 , C08L27/06
摘要： A diisononyl terephthalate (DINT) plasticizer is synthesized by esterifying an isononanol mixture composed of multiple alcohols with pure terephthalic acid in the presence of an esterification catalyst, and the DINT plasticizer due to featuring a low plasticizer migration below 1.4% and a low glass transition temperature below −75° C. is so suitable for making those soft plastic products, such as hoses, wires, cables, exercise mats, table mats, playing balls or disposable gloves, required for having a high content of plasticizers more than 70 PHR.
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公开(公告)号：US10179758B2
公开(公告)日：2019-01-15
申请号：US15615890
申请日：2017-06-07
摘要： A method for crystallizing succinic acid includes agitating a succinic acid reaction solution with a jet-flow agitator that is rotated at low speed and has a low volume power density; compared with the conventional agitators, the jet-flow agitator helps increase the uniformity of succinic acid particles, shorten the time required for crystallizing succinic acid, and raise the yield of the crystallized succinic acid as well as purity of crystallized succinic acid having a purity of 99.8-99.9%.
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公开(公告)号：US11180436B2
公开(公告)日：2021-11-23
申请号：US16892359
申请日：2020-06-04
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Chiou-Nan Lai
摘要： A method for purifying by-product ethylene glycol of polyester in converting plasticizer includes: inputting a reaction liquid waste stream including ethylene glycol and 2-ethylhexanol into an ethylene glycol dehydration tower; inputting a hot water stream into the ethylene glycol dehydration tower to mix with the reaction liquid waste stream and to remove the 2-ethylhexanol from the reaction liquid waste stream; dehydrating the ethylene glycol via the ethylene glycol dehydration tower to collect a crude ethylene glycol stream including dehydrated ethylene glycol from a tower bottom of the ethylene glycol dehydration tower and to collect an organic liquid waste stream including the 2-ethylhexanol from a tower top of the ethylene glycol dehydration tower; and inputting the crude ethylene glycol stream into an ethylene glycol distillation tower to collect a ethylene glycol solution from a tower top of the ethylene glycol distillation tower.
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公开(公告)号：US11873278B2
公开(公告)日：2024-01-16
申请号：US17398003
申请日：2021-08-10
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Hsun-Min Lin
摘要： A method for preparing a low migration plasticizer of di-2-ethylhexyl terephthalate is provided. The method includes a step of adding a short chain alcohol component having 4 to 6 carbon atoms and a long chain alcohol component having 9 to 13 carbon atoms in an esterification reaction between terephthalic acid and 2-ethylhexanol, so as to obtain a modified di-2-ethylhexyl terephthalate including residues derived from the short chain alcohol component and the long chain alcohol component. The esterification reaction is carried out under a temperature from 30° C. to 225° C. and a pressure from 80 mbar to 1033 mbar.
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公开(公告)号：US11117853B2
公开(公告)日：2021-09-14
申请号：US17002930
申请日：2020-08-26
发明人： Te-Chao Liao , Jung-Jen Chuang , Chung-Yu Chen , Che-Jung Hsu
摘要： A method for manufacturing and a method for decolorizing dioctyl terephthalate are provided. The decolorizing dioctyl terephthalate includes: providing an unpurified dioctyl terephthalate; mixing the unpurified dioctyl terephthalate with a reducing agent and an adsorption medium to obtain a first decolorizing product; and mixing the first decolorizing product with a decolorizing adsorbent material to obtain a second decolorizing product. The method for manufacturing dioctyl terephthalate includes: a transesterification step, an alkaline washing and neutralization step, a redox step, a decolorization step and a stripping step; the decolorizing adsorbent material has an acid value between 0.1 and 2 mg KOH/g, a relative humidity between 2 and 10%, and a fineness between 80 and 100 cm2/g.
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9.发明申请公开(公告)号：US20200172463A1
公开(公告)日：2020-06-04
申请号：US16656883
申请日：2019-10-18
IPC分类号： C07C67/303 , B01J23/46 , B01J21/04 , B01J8/10 , B01J8/08
摘要： A hydrogenation method for increasing the yield of cyclohexane-1,4-dicarboxylic acid diisooctyl ester is provided. The hydrogenation method uses a hydrogenating reaction tank, which is equipped with a hollow-shaft gas-introducing mixer having air-extracting, air-exhausting and mixing functions, to allow hydrogen gas to be uniformly dispersed in a reaction solution. A ruthenium-on-alumina (Ru/Al2O3) hydrogenation catalyst can be used for carrying out a hydrogenation reaction under gentle conditions. Therefore, the hydrogenation catalyst can be used in a reduced amount, the risk of side reaction(s) can be reduced, and the yield of cyclohexane-1,4-dicarboxylic acid diisooctyl ester can reach at least 99% with a cis isomer proportion of at least 85.0%. The hydrogenation method shows extremely high economic benefit.
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公开(公告)号：US10189766B2
公开(公告)日：2019-01-29
申请号：US15687608
申请日：2017-08-28
IPC分类号： C07C45/62 , B01J21/00 , B01J23/00 , B01J21/18 , B01J23/44 , B01J35/00 , B01J35/02 , C07C45/79
摘要： A process for producing 2-ethylhexanal involves performing reaction using a reaction tank equipped with a gas-introducing mixer having extracting, exhausting, and stirring functions in the presence of a palladium on carbon catalyst having a carbon carrier with lower impurity content and higher specific surface area for hydrogenation, and introducing hydrogen gas evenly into reaction liquid; resulted in that the process minimizes operational pressure for hydrogenation and increases a yield of 2-ethylhexanal at least up to 98.0%.
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