Umicore has been granted a patent for the use of a material containing palladium and platinum in a specific weight ratio to increase the low-temperature storage of nitrogen oxides. The material is used in conjunction with another material containing palladium and zeolite on a carrier substrate. The patent focuses on temperatures below 200°C. GlobalData’s report on Umicore gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Umicore, Hydrogen storage alloys was a key innovation area identified from patents. Umicore's grant share as of September 2023 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Use of material b to increase low-temperature storage of nitrogen oxides
A recently granted patent (Publication Number: US11772077B2) discloses the use of specific materials for increasing the low-temperature storage of nitrogen oxides (NOx) below 200°C. The invention involves the use of two different materials, material A and material B, both containing palladium and zeolite, on a carrier substrate of length L.
Claim 1 states that material B, which contains palladium and platinum in a weight ratio of 2:3 to 10:1, is used to enhance the low-temperature storage of NOx. Material A, on the other hand, contains palladium and zeolite. The use of these materials on the carrier substrate helps improve the storage of NOx at temperatures below 200°C.
Claim 2 specifies that the zeolite used in material A can be of various structure types, including ABW, AEI, AFX, BEA, CHA, ERI, ESV, FAU, FER, KFI, LEV, LTA, MWW, SOD, or STT. Claim 3 narrows down the zeolite options to AEI, AFX, BEA, CHA, FER, or LEV.
Claim 4 mentions that the palladium content in material A can range from 0.01 to 20% by weight, based on the sum of the weights of zeolite and palladium. Claim 5 adds that material A may also contain platinum in addition to palladium, while claim 6 specifies that the weight ratio of palladium to platinum can range from 20:1 to 1:1.
Claim 7 states that the carrier substrate can be a flow-through substrate or a wall flow filter. Claims 8 and 9 describe the presence of coatings (coating A and coating B) on the carrier substrate, with coating A directly on the substrate and coating B on top of coating A.
Claims 10, 11, and 12 provide further details on the composition of the coatings. Claim 10 specifies the presence of a zeolite coating with palladium directly on the carrier substrate, followed by a coating containing palladium and platinum in a specific weight ratio. Claims 11 and 12 describe different weight ratios for palladium and platinum in coating B.
Claim 13 mentions the use of a wall-flow filter as the carrier substrate with an in-wall coating of coating B. Claim 14 introduces the presence of an SCR catalyst in addition to the carrier substrate, material A, and material B. Claim 15 specifies the zeolite structure types for the SCR catalyst and the possible exchange metals. Finally, claim 16 mentions the location of an injection device for a reducing agent between the carrier substrate, material A, material B, and the SCR catalyst.
In summary, this granted patent discloses the use of specific materials and configurations to enhance the low-temperature storage of nitrogen oxides, providing potential advancements in emission control technologies.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
