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公开(公告)号：US20200347192A1
公开(公告)日：2020-11-05
申请号：US16962659
申请日：2019-01-28
Applicant: BASF SE
Inventor： Stephan Bauer , Katrin Baumann , Markus Toennessen , Thomas Daniel , Hanno Rüdiger Wolf
Abstract: A method of pneumatically conveying superabsorbent particles, wherein the superabsorbent particles have been admixed with an aqueous wax dispersion prior to the pneumatic conveying, the wax has a glass transition temperature of at least 65° C. and, based on the untreated super-absorbent particles, from 0.020% to 0.20% by weight of wax has been used.
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公开(公告)号：US20200231711A1
公开(公告)日：2020-07-23
申请号：US16488659
申请日：2018-02-26
Applicant: BASF SE
Inventor： Stephan Bauer , Markus Toennessen , Christophe Bauduin , Katrin Baumann , Marco Krüger , Andreas Daiss , Markus Muehl
Abstract: An apparatus for production of pulverulent polymers having a reactor for droplet polymerization with an apparatus for dropletization of a monomer solution for the preparation of the polymer. The apparatus for dropletization has holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point at the periphery of the reactor and a fluidized bed, wherein at least one of the following is fulfilled: an apparatus for increasing turbulence in the gas flow is disposed in the region of the apparatus for dropletization of the monomer solution, an apparatus for increasing turbulence in the gas flow is disposed in the region of the addition point for the gas, the addition point for gas is configured such that elevated turbulence is generated. A process for producing pulverulent polymers, in which an increase in flow turbulence in the gas flow in the region of the apparatus for dropletization also is disclosed.
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公开(公告)号：US12196660B2
公开(公告)日：2025-01-14
申请号：US16968225
申请日：2019-02-18
Applicant: BASF SE
Inventor： Markus Toennessen , Marc Haefner , Karsten Kraemer , Christophe Bauduin , Thomas Daniel
IPC: G01N15/08
Abstract: A method of measuring indices in superabsorbents, by initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing a component A in the aqueous solution or dispersion, measuring the enrichment of component A in the aqueous solution or dispersion during the swelling of the superabsorbent, using the enrichment of component A in the aqueous solution or dispersion to measure the time-dependent swelling characteristics and using these to determine the swelling constant k or the characteristic swell time τ, the index being dependent on the permeability of the superabsorbent, and ascertaining the index by means of a correlation measured beforehand between swelling constant k and index or characteristic swell time τ and index.
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公开(公告)号：US11332550B2
公开(公告)日：2022-05-17
申请号：US16488659
申请日：2018-02-26
Applicant: BASF SE
Inventor： Stephan Bauer , Markus Toennessen , Christophe Bauduin , Katrin Baumann , Marco Krüger , Andreas Daiss , Markus Muehl
Abstract: An apparatus for production of pulverulent polymers having a reactor for droplet polymerization with an apparatus for dropletization of a monomer solution for the preparation of the polymer. The apparatus for dropletization has holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point at the periphery of the reactor and a fluidized bed, wherein at least one of the following is fulfilled: an apparatus for increasing turbulence in the gas flow is disposed in the region of the apparatus for dropletization of the monomer solution, an apparatus for increasing turbulence in the gas flow is disposed in the region of the addition point for the gas, the addition point for gas is configured such that elevated turbulence is generated. A process for producing pulverulent polymers, in which an increase in flow turbulence in the gas flow in the region of the apparatus for dropletization also is disclosed.
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公开(公告)号：US11846645B2
公开(公告)日：2023-12-19
申请号：US17616705
申请日：2020-06-24
Applicant: BASF SE
Inventor： Thomas Daniel , Markus Toennessen , Christophe Bauduin
CPC classification number: G01N5/02 , G01N15/08 , G01N2015/0866
Abstract: In a method of measuring parameters of superabsorbents, the absorption capacity of superabsorbents is determined under pressure, by reducing the pressure applied to a sample of the superabsorbent stepwise and determining the absorption capacity at each pressure. In addition, the rise in absorption capacity after a reduction in pressure is measured as a function of time and this is used to calculate the swelling constant k or the characteristic swelling time τ. Swelling constant or characteristic swelling time or the magnitude of the difference in absorption capacity at two different pressures are used to determine further parameters of the superabsorbent.
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Patent Agency Ranking
公开(公告)号：US11491463B2
公开(公告)日：2022-11-08
申请号：US16958793
申请日：2019-01-02
Applicant: BASF SE
Inventor： Stephan Bauer , Katrin Baumann , Markus Toennessen , Christophe Bauduin , Markus Christian Biel , Thomas Daniel
Abstract: Superabsorbent mixtures M comprising at least 70% by weight of superabsorbent A having a liquid absorption of 20 g/g (T20) of less than 300 s and/or a volumetric liquid absorption under pressure 0.3 psi (2.07 kPa) (VAUL) with a τ value of less than 400 s, and at least 5% by weight of superabsorbent B having a centrifuge retention capacity (CRC) of at least 30 g/g.
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公开(公告)号：US11859059B2
公开(公告)日：2024-01-02
申请号：US16962659
申请日：2019-01-28
Applicant: BASF SE
Inventor： Stephan Bauer , Katrin Baumann , Markus Toennessen , Thomas Daniel , Hanno Rüdiger Wolf
CPC classification number: C08J3/124 , A61L15/60 , B65G53/10 , C08J2391/06 , C08L23/0869
Abstract: A method of pneumatically conveying superabsorbent particles, wherein the superabsorbent particles have been admixed with an aqueous wax dispersion prior to the pneumatic conveying, the wax has a glass transition temperature of at least 65° C. and, based on the untreated superabsorbent particles, from 0.020% to 0.20% by weight of wax has been used.
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公开(公告)号：US20220317006A1
公开(公告)日：2022-10-06
申请号：US17616705
申请日：2020-06-24
Applicant: BASF SE
Inventor： Thomas Daniel , Markus Toennessen , Christophe Bauduin
Abstract: In a method of measuring parameters of superabsorbents, the absorption capacity of superabsorbents is determined under pressure, by reducing the pressure applied to a sample of the superabsorbent stepwise and determining the absorption capacity at each pressure. In addition, the rise in absorption capacity after a reduction in pressure is measured as a function of time and this is used to calculate the swelling constant k or the characteristic swelling time τ. Swelling constant or characteristic swelling time or the magnitude of the difference in absorption capacity at two different pressures are used to determine further parameters of the superabsorbent.
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公开(公告)号：US20210362126A1
公开(公告)日：2021-11-25
申请号：US16958793
申请日：2019-01-02
Applicant: BASF SE
Inventor： Stephan Bauer , Katrin Baumann , Markus Toennessen , Christophe Bauduin , Markus Christian Biel , Thomas Daniel
Abstract: Superabsorbent mixtures M comprising at least 70% by weight of superabsorbent A having a liquid absorption of 20 g/g (T20) of less than 300 s and/or a volumetric liquid absorption under pressure 0.3 psi (2.07 kPa) (VAUL) with a τ value of less than 400 s, and at least 5% by weight of superabsorbent B having a centrifuge retention capacity (CRC) of at least 30 g/g.
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公开(公告)号：US20210033516A1
公开(公告)日：2021-02-04
申请号：US16968225
申请日：2019-02-18
Applicant: BASF SE
Inventor： Markus Toennessen , Marc Haefner , Karsten Kraemer , Christophe Bauduin , Thomas Daniel
IPC: G01N15/08
Abstract: A method of measuring indices in superabsorbents, by initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing a component A in the aqueous solution or dispersion, measuring the enrichment of component A in the aqueous solution or dispersion during the swelling of the superabsorbent, using the enrichment of component A in the aqueous solution or dispersion to measure the time-dependent swelling characteristics and using these to determine the swelling constant k or the characteristic swell time T, the index being dependent on the permeability of the superabsorbent, and ascertaining the index by means of a correlation measured beforehand between swelling constant k and index or characteristic swell time T and index.
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