PATENT CLAIM ANALYSIS

Application Number: 15751959
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["562", "519000"]

Abstract:
A process for stably and safely producing acetic acid without increasing an internal pressure of a distillation column is provided. The process comprises ( 1 ) a carbonylation reaction step for allowing methanol to react with carbon monoxide; ( 2 ) a flash step for separating the reaction mixture into a volatile phase and a less-volatile phase; ( 3 ) a first distillation step for separating the volatile phase into a first overhead and a crude acetic acid stream rich in acetic acid; and ( 4 ) a separation step for separating at least acetaldehyde from the first overhead. The separation step ( 4 ) comprises ( 6 ) a second distillation step for distilling the first overhead while controlling an internal pressure of a distillation column provided with a pressure control unit  68  to form a second overhead rich in acetaldehyde and methyl iodide and a bottom or lower stream, and ( 7 ) an extraction step for extracting acetaldehyde from the second overhead to form an extract rich in acetaldehyde and a raffinate rich in methyl iodide.

Claim (Index 23):
A process for producing acetic acid, comprising:\n a carbonylation reaction step for allowing methanol to react with carbon monoxide in the presence of a catalyst system, acetic acid, methyl acetate, and water, wherein the catalyst system comprises a metal catalyst, an ionic metal iodide, and methyl iodide; a flash step for separating the reaction mixture into a volatile phase and a less-volatile phase; a first distillation step for separating the volatile phase into a first overhead and a crude acetic acid stream, wherein the first overhead is rich in at least one lower boiling point component selected from the group consisting of methyl iodide and acetaldehyde, and the crude acetic acid stream is rich in acetic acid; and a separation step for separating at least acetaldehyde from the first overhead, wherein the separation step comprises: a second distillation step for distilling the first overhead to separate the first overhead into a second overhead rich in acetaldehyde and methyl iodide and a bottom or lower stream, while controlling an internal pressure of a distillation column by the following method (1) and/or (2): (1) introducing at least one gas selected from the group consisting of a nitrogen gas, an off-gas, and an inert gas, (2) discharging or withdrawing a non-condensable gas, and\n an extraction step for extracting acetaldehyde from the second overhead to form an extract rich in acetaldehyde and a raffinate rich in methyl iodide.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 88.0
- Lexical Diversity: 2.35443
- Patent Class: 562.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15565604', '14440545', '15577524', '14488900', '11788455']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7563813386302891
- 35 USC 102 Novelty (BERT): 0.5354895592975436
- Combined Prediction Score: 0.7342921606970146
- Mean Citation Score: 362.925106
- Max Citation Score: 369.48203
- Similarity Product: 344.48281935191216

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