PATENT CLAIM ANALYSIS

Application Number: 15938272
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["423", "243110"]

Abstract:
Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.

Claim (Index 54):
An apparatus for using ammonia to treat fluid catalytic cracking tail-gas, the apparatus comprising:\n a flow-through heat-exchanger in thermal communication with a flow that includes the tail-gas, the heat exchanger including a first liquid coolant that is materially isolated from the flow; downstream, along the flow, from the heat-exchanger, a dust-removal vessel that includes a washing-liquid spray layer configured to spray washing liquid against the flow to remove dust from the flow; downstream from the dust-removal vessel, a sulfur dioxide absorption vessel that supports a liquid circuit configured to:\n provide an ammonia-bearing liquid to a sprayer that is directed against the flow; and \n recirculate the liquid, after passing through the sprayer, to the sprayer; \n a denitrification system configured to remove nitrogen oxides from the flow, the denitrification system disposed downstream along the flow, from the heat exchanger, and upstream from the dust-removal vessel; the dust-removal vessel further comprising, transverse to the flow:\n a demister, \n first sprayers in a first washing-liquid spray layer; and, \n below the first layer, second sprayers in a second washing-liquid spray layer; \n wherein the sprayers are configured to direct washing-liquid against the flow; and \n a waste-heat recovery system that is:\n disposed downstream from the denitrification system and upstream from the dust-removal vessel; \n configured to remove heat from the flow; and \n includes a second liquid coolant that is materially isolated from the flow.

Metadata:
- Claim Count in Document: 28.0
- Percentile: 90.0
- Lexical Diversity: 2.56604
- Patent Class: 423.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15618975', '15923031', '14829905', '15481736', '13166115']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7359334459435064
- 35 USC 102 Novelty (BERT): 0.5984279578289182
- Combined Prediction Score: 0.7221828971320476
- Mean Citation Score: 284.43908
- Max Citation Score: 493.0444
- Similarity Product: 483.4162135002612

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

Dataset: test