PATENT CLAIM ANALYSIS

Application Number: 15758295
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["422", "234000"]

Abstract:
Provided are urea manufacturing method and apparatus, which can increase the conversion ratio into urea and to reduce the consumption of steam. The temperature of the reactor is increased by introducing the entire amount of raw material ammonia and introducing a portion of the decomposed gas from the stripper into the reactor. The raw material ammonia is preferably heated using the steam condensate generated in the purification step, and/or the steam generated by the heat of condensation of the decomposed gas and the unreacted substances in the condensation step. The heating temperature is preferably between 70 and 140° C.

Claim (Index 6):
A urea manufacturing apparatus comprising:\n a reactor in which carbon dioxide and ammonia are reacted under a condition of excessive ammonia, thereby providing a synthesis mixture containing urea, ammonium carbamate, water, unreacted ammonia, and unreacted carbon dioxide; an ammonia introduction line that is used to introduce an entire amount of raw material ammonia into the reactor; a stripper that decomposes the ammonium carbamate by heating the synthesis mixture and stripping using at least a portion of raw material carbon dioxide as an auxiliary agent, thereby providing a decomposed gas containing ammonia and carbon dioxide, and a urea synthesis solution containing ammonia, carbon dioxide, water, and urea; a purification system that purifies urea by separating the unreacted substances including ammonia, carbon dioxide, and water from the urea synthesis solution, and recovers the separated unreacted substances; a decomposed gas introduction line that is used to introduce a portion of the decomposed gas into the reactor; a condenser that condenses the rest of the decomposed gas and at least a portion of the unreacted substances recovered in the purification step in a condenser, thereby providing a condensate; and a condensate introduction line that is used to introduce the condensate to the reactor using an ejector which uses at least a portion of the raw material ammonia as a driving fluid.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 1.84211
- Patent Class: 422.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15758285', '11909744', '11909765', '14950325', '11421002']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.822642479943236
- 35 USC 102 Novelty (BERT): 0.563807738097555
- Combined Prediction Score: 0.7967590057586679
- Mean Citation Score: 356.802742
- Max Citation Score: 465.43744
- Similarity Product: 447.2512131713103

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

Dataset: test