PATENT CLAIM ANALYSIS

Application Number: 15910295
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["252", "373000"]

Abstract:
A shift conversion catalyst layer is divided into at least two front and back stages. A first catalyst and a second catalyst are provided on the upstream side and the downstream side, respectively. The first catalyst has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas at a constant carbon monoxide concentration in the supplied reaction gas and a constant reaction temperature. The first catalyst is combined with the second catalyst such that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas in the second catalyst is lower than that in the first catalyst. Whereby, the conversion rate of a carbon monoxide concentration of a carbon monoxide shift conversion apparatus can be improved without increasing the used amount of a shift conversion catalyst.

Claim (Index 1):
A method of carbon monoxide shift conversion for reacting carbon monoxide and water vapor contained in a reaction gas and converting them into carbon dioxide and hydrogen, comprising:\n a shift reaction step divided into at least two continuous shift reaction steps, where a first catalyst stage is used upstream in a first shift conversion step, whereas a second catalyst stage is used downstream in a second shift reaction step, each of the first and second catalyst stages having an upstream end and a downstream end, wherein the first catalyst stage has a property that a carbon monoxide conversion rate decreases with an increase in carbon dioxide concentration in a supplied reaction gas from 1 vol % to 14 vol % at the upstream end of the first catalyst stage due to carbon dioxide poisoning in the case of a constant carbon monoxide concentration in the supplied reaction gas at the upstream end of the first catalyst stage and a constant reaction temperature, and the second catalyst stage has a property that the degree of decrease in carbon monoxide conversion rate with respect to an increase in carbon dioxide concentration in the supplied reaction gas from 1 vol % to 14 vol % at the upstream end of the second catalyst stage due to carbon oxide poisoning is lower than that of the first catalyst stage in the case that (1) the constant carbon monoxide concentration in the supplied reaction gas (2) at the upstream end of the second catalyst stage (3) is equal to the carbon monoxide concentration in a reaction gas supplied to the upstream end of the first catalyst stage.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 90.0
- Lexical Diversity: 2.4
- Patent Class: 252.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11509257', '11063724', '09942881', '10168854', '10407269']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7916912783348531
- 35 USC 102 Novelty (BERT): 0.5018823612739731
- Combined Prediction Score: 0.7627103866287651
- Mean Citation Score: 256.709916
- Max Citation Score: 268.01022
- Similarity Product: 203.2430302778292

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test