PATENT CLAIM ANALYSIS

Application Number: 15913944
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["562", "599000"]

Abstract:
A method of making acrylic acid in liquid phase by contacting a feed stream containing lactic acid, lactide, or mixtures thereof with a molten salt catalyst comprising a protic ionic liquid (PIL), which contains a bromide anion (Br − ), is provided.

Claim (Index 33):
A method of making acrylic acid comprising the steps:\n a. contacting a feed stream comprising lactic acid, lactide, or mixtures thereof with a first molten salt catalyst in a first reactor at a reaction temperature of about 120\u00b0 C. and a reaction time of about 5 h to produce a first stream comprising 2-bromopropionic acid (2-BrPA) at a yield of about 60 mol % and with a selectivity of more than 95 mol %; b. contacting said 2-BrPA with a second molten salt catalyst in a second reactor at a reaction temperature of about 180\u00b0 C. and a second reaction time of about 3 h to produce a second stream comprising 3-bromopropionic acid (3-BrPA) at a yield of about 52 mol % and with a selectivity of about 54 mol %, and said acrylic acid at a yield of about 45 mol %; and c. contacting said 3-BrPA with a trioctylamine (TOA) in a third reactor at a third reaction temperature of about 180\u00b0 C. and a third reaction time of about 0.5 h to produce a third stream comprising said acrylic acid at a yield of about 90 mol % and with a selectivity of more than about 90 mol %; wherein said first molten salt catalyst comprises 3-methyl-1-(4-butane sulfonic acid) imidazolium bromide ([MIMBS]Br); wherein said [MIMBS]Br has a molar ratio to said lactic acid, lactide, or mixtures thereof of about 3:1; wherein said molten salt catalyst further comprises a 20 mmol HBr aqueous solution; wherein said second molten salt catalyst comprises tetrabutylphosphonium bromide ([PBu 4 ]Br); wherein said [PBu 4 ]Br and said 2-BrPA have a molar ratio of about 9:1; wherein said acrylic acid of said second stream is combined with said acrylic acid of said third stream into a production stream of said acrylic acid; and wherein said acrylic acid in said production stream has an overall acrylic acid yield of about 55 mol % and an overall acrylic acid selectivity of about 83 mol %.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 90.0
- Lexical Diversity: 1.25
- Patent Class: 562.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15868002', '15661016', '16063435', '15342428', '13760472']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7466580268572431
- 35 USC 102 Novelty (BERT): 0.5742174939901324
- Combined Prediction Score: 0.7294139735705321
- Mean Citation Score: 348.350646
- Max Citation Score: 484.91544000000016
- Similarity Product: 377.3390124467183

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

Dataset: test