PATENT CLAIM ANALYSIS

Application Number: 15769871
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["585", "638000"]

Abstract:
A process for preparing C2 and C3 olefins comprises contacting a feedstream including hydrogen, carbon monoxide, and a bifunctional catalyst in a reaction under certain specified conditions. The catalyst includes as components (1) chromium oxide and zinc oxide mixed metal oxides, and (2) a SAPO-34 molecular sieve. The resulting product of the reaction is relatively high in the target lower olefins and relatively low in less desirable products, including C2 and C3 paraffins, C4+ hydrocarbons, oxygenates, and methane, thereby reducing or eliminating the need for certain previously common and costly separations. The bifunctional catalyst as used in the inventive process also offers improvements in catalyst life in comparison with some methanol-to-olefins catalysts. The process may be carried out as a single unit operation.

Claim (Index 1):
A process for preparing a mixture of lower hydrocarbons, comprising\n (A) introducing a feedstream into a reactor,\n the feedstream comprising hydrogen gas and carbon monoxide gas, such that the volumetric ratio of hydrogen to carbon monoxide ranges from greater than 0.5:1 to less than 3:1; and \n (B) contacting the feedstream and a bifunctional catalyst in the reactor,\n the bifunctional catalyst having not been reduced prior to the contacting, \n the bifunctional catalyst comprising as components\n (1) chromium oxide/zinc oxide mixed metal oxides and \n (2) a SAPO-34 silicoaluminophosphate molecular sieve;\n under reaction conditions sufficient to form a product mixture, \n the reaction conditions comprising \n \u2003(a) a reactor temperature ranging from greater than 300 degrees Celsius to less than 450 degrees Celsius; \n \u2003(b) a pressure ranging from greater than 0.2 megapascal to less than 5.0 megapascals; \n the product mixture comprising, as calculated on a hydrogen-free, carbon monoxide-free, and carbon dioxide-free basis, \n \u2003(c) a combined ethylene and propylene content greater than 30 percent by weight; \n \u2003(d) a combined ethane and propane content less than 50 weight percent; \n \u2003(e) a methane content less than 15 weight percent; \n \u2003(f) a combined saturated and unsaturated C4 and higher hydrocarbon content less than 20 weight percent; and \n \u2003(g) an oxygenates content less than 5 weight percent; \n each weight percentage being based upon total product mixture weight and, \n when taken together, equaling 100 weight percent.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 91.0
- Lexical Diversity: 1.59091
- Patent Class: 585.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13882946', '13813168', '13813115', '14857068', '14694282']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6709434372771139
- 35 USC 102 Novelty (BERT): 0.5030953028513934
- Combined Prediction Score: 0.6541586238345418
- Mean Citation Score: 219.00536
- Max Citation Score: 249.505
- Similarity Product: 174.19736843705178

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

Dataset: test