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公开(公告)号：US20230150904A1
公开(公告)日：2023-05-18
申请号：US18155597
申请日：2023-01-17
Inventor： Yi Yuan
Abstract: The invention provides a process for refining bio-based propylene glycol, wherein impurities having boiling points close to that of propylene glycol are separated. In this process, C5-C20 oleophilic alcohol compounds, C5-C20 alkanes and/or C4-C20 oleophilic ketone compounds are subjected to azeotropism as an azeotropic solvent together with the bio-based propylene glycol to obtain an azeotrope containing propylene glycol. Then the azeotropic solvent in the azeotrope is separated to obtain a crude propylene glycol which is further purified to obtain propylene glycol.
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公开(公告)号：US11352463B2
公开(公告)日：2022-06-07
申请号：US16348408
申请日：2017-11-09
Inventor： Haiyu Ren , Marlon Salvador Morales , Yi Yuan , Jing Liu , Hongbin Qi
Abstract: Disclosed are bio-based mono-ethylene glycol (MEG) compositions containing from about 1 ppm to about 5000 ppm of at least one C3-C12 1,2-diol, bio-based polyester compositions made therefrom, and methods of making the same are disclosed. Preforms and blow-molded polyester containers prepared from the bio-based MEG and polyester are described.
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公开(公告)号：US11104629B2
公开(公告)日：2021-08-31
申请号：US16534352
申请日：2019-08-07
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren , Indra Prakash , Yu Shi
IPC: C07C29/00 , B01J25/02 , B01J27/188 , B01J35/00 , C07C29/132 , C07C29/60 , B01J37/04 , B01J23/835 , B01J23/888 , B01J27/19 , C07C31/20 , B01J23/30 , B01J37/00
Abstract: Provided is a method for preparing a diol. In the method, a saccharide and hydrogen as raw materials are contacted with a catalyst in water to prepare the diol. The employed catalyst is a composite catalyst comprised of a main catalyst and a cocatalyst, wherein the main catalyst is a water-insoluble acid-resistant alloy; and the cocatalyst is a soluble tungstate and/or soluble tungsten compound. The method uses an acid-resistant, inexpensive and stable alloy needless of a support as a main catalyst, and can guarantee a high yield of the diol in the case where the production cost is relatively low.
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公开(公告)号：US20220055974A1
公开(公告)日：2022-02-24
申请号：US17387123
申请日：2021-07-28
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren , Indra Prakash , Yu Shi
IPC: C07C29/00 , B01J25/02 , B01J27/188 , B01J35/00 , C07C29/132 , C07C29/60 , B01J37/04 , B01J23/835 , B01J23/888 , B01J27/19 , C07C31/20
Abstract: Provided is a method for preparing a diol. In the method, a saccharide and hydrogen as raw materials are contacted with a catalyst in water to prepare the diol. The employed catalyst is a composite catalyst comprised of a main catalyst and a cocatalyst, wherein the main catalyst is a water-insoluble acid-resistant alloy; and the cocatalyst is a soluble tungstate and/or soluble tungsten compound. The method uses an acid-resistant, inexpensive and stable alloy needless of a support as a main catalyst, and can guarantee a high yield of the diol in the case where the production cost is relatively low.
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公开(公告)号：US20210371363A1
公开(公告)日：2021-12-02
申请号：US17280595
申请日：2019-09-19
Inventor： Yi Yuan
Abstract: The invention provides a process for refining bio-based propylene glycol, wherein impurities having boiling points close to that of propylene glycol are separated. In this process, C5-C20 oleophilic alcohol compounds, C5-C20 alkanes and/or C4-C20 oleophilic ketone compounds are subjected to azeotropism as an azeotropic solvent together with the bio-based propylene glycol to obtain an azeotrope containing propylene glycol. Then the azeotropic solvent in the azeotrope is separated to obtain a crude propylene glycol which is further purified to obtain propylene glycol.
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Patent Agency Ranking
公开(公告)号：US10940465B2
公开(公告)日：2021-03-09
申请号：US16742479
申请日：2020-01-14
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren , Indra Prakash , Yu Shi
Abstract: Disclosed is an acid-resistant alloy catalyst comprising nickel, one or more rare earth elements, stannum and aluminum. The acid-resistant alloy catalyst is low-cost and stable, and does not need a carrier, and can be stably used in continuous industrial production, thus achieving a low production cost.
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公开(公告)号：US20200215519A1
公开(公告)日：2020-07-09
申请号：US16625057
申请日：2018-06-22
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren
IPC: B01J23/887 , B01J35/00
Abstract: An acid-resistant alloy catalyst, comprising nickel, one or more rare earth element, tin, aluminum and molybdenum. The catalyst is cheap and stable, does not need a carrier, can be stably applied in industrial continuous production, and can lower the production cost.
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公开(公告)号：US10464870B2
公开(公告)日：2019-11-05
申请号：US15514980
申请日：2015-09-23
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren , Indra Prakash , Yu Shi
IPC: C07C29/00 , B01J25/02 , B01J23/835 , B01J23/888 , B01J27/19 , C07C31/20 , B01J37/04 , B01J35/00 , B01J27/188 , C07C29/132 , C07C29/60 , B01J23/30 , B01J37/00
Abstract: Provided is a method for preparing a diol. In the method, a saccharide and hydrogen as raw materials are contacted with a catalyst in water to prepare the diol. The employed catalyst is a composite catalyst comprised of a main catalyst and a cocatalyst, wherein the main catalyst is a water-insoluble acid-resistant alloy; and the cocatalyst is a soluble tungstate and/or soluble tungsten compound. The method uses an acid-resistant, inexpensive and stable alloy needless of a support as a main catalyst, and can guarantee a high yield of the diol in the case where the production cost is relatively low.
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公开(公告)号：US20190112248A1
公开(公告)日：2019-04-18
申请号：US16090345
申请日：2017-03-30
IPC: C07C29/90 , C07C29/80 , B01J23/888 , B01J23/887
Abstract: The present invention provides a method for increasing the UV transmittance of ethylene glycol. The method uses an ethylene glycol solution and hydrogen as raw materials, and uses an alloy catalyst comprising nickel, one or more rare-earth elements, tin, and aluminum, the contents thereof in parts by weight being 10-90, 1-5, 1-60, and 5-9, respectively. The method of the present invention uses an inexpensive, stable-in-aqueous-phase, carrier-free alloy as a catalyst, and continuously adds hydrogen to reduce unsaturated impurities in ethylene glycol. In application of the method of the present invention in continuous industrial-scale production, the use of this type of alloy catalyst could be especially significant for the achievement of long-term system stability and control of production costs.
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公开(公告)号：US20170210687A1
公开(公告)日：2017-07-27
申请号：US15514980
申请日：2015-09-23
Inventor： Jing Liu , Hongbin Qi , Haiyu Ren , Indra Prakash , Yu Shi
IPC: C07C29/00 , B01J27/19 , B01J23/888 , C07C31/20 , B01J23/835
Abstract: Provided is a method for preparing a diol. In the method, a saccharide and hydrogen as raw materials are contacted with a catalyst in water to prepare the diol. The employed catalyst is a composite catalyst comprised of a main catalyst and a cocatalyst, wherein the main catalyst is a water-insoluble acid-resistant alloy; and the cocatalyst is a soluble tungstate and/or soluble tungsten compound. The method uses an acid-resistant, inexpensive and stable alloy needless of a support as a main catalyst, and can guarantee a high yield of the diol in the case where the production cost is relatively low.
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