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 1):
A urea manufacturing method comprising:\n an ammonia introduction step of introducing an entire amount of raw material ammonia into a reactor; a synthesis step of reacting carbon dioxide and ammonia under a condition of excessive ammonia in the reactor, thereby providing a synthesis mixture containing urea, ammonium carbamate, water, unreacted ammonia, and unreacted carbon dioxide; a decomposition step of decomposing 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 step of separating an unreacted substances including ammonia, carbon dioxide, and water from the urea synthesis solution, thereby providing a purified urea solution and recovering the separated unreacted substances; a decomposed gas introduction step of introducing a portion of the decomposed gas into the reactor; a condensation step of condensing 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 step of introducing 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): 0.8226595069373132
- 35 USC 102 Novelty (BERT): 0.5637453024244627
- Combined Prediction Score: 0.7967680864860281
- Mean Citation Score: 356.802742
- Max Citation Score: 465.43744
- Similarity Product: 446.84481719604486

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

Dataset: test