PATENT CLAIM ANALYSIS

Application Number: 15861702
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["562", "600000"]

Abstract:
Processes for the purification of bio-based acrylic acid to crude and glacial acrylic acid are provided. The bio-based acrylic acid is produced from hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof. The purification includes some or all of the following processes: extraction, drying, distillation, and melt crystallization. The produced glacial or crude acrylic acid contains hydroxypropionic, hydroxypropionic acid derivatives, or mixtures thereof as an impurity.

Claim (Index 23):
A glacial acrylic acid composition comprising about 99 wt % acrylic acid, wherein a portion of the remaining impurities in said glacial acrylic acid composition is lactic acid; and wherein said glacial acrylic acid composition has a bio-based content greater than about 3%; and wherein said glacial acrylic acid composition is produced by the steps comprising:\n a. Providing an aqueous solution of acrylic acid comprising: 1) from about 8 wt % to about 16 wt % acrylic acid; and 2) from about 0.1 wt % to about 10 wt % lactic acid, lactic acid derivatives, or mixtures thereof, and wherein said aqueous solution of acrylic acid is essentially free of maleic anhydride, furfural, and formic acid; b. Extracting said aqueous solution of acrylic acid, with ethyl acetate to produce an extract; c. Drying said extract with sodium sulfate to produce a dried extract; d. Vacuum distilling said dried extract at about 70 mm Hg and 40\u00b0 C. to produce a distilled crude acrylic acid composition; e. Fractionally distilling said distilled crude acrylic acid composition at about 40 mm Hg and collecting fractions from 59\u00b0 C. to 62\u00b0 C. to produce a distilled acrylic acid composition; f. Cooling said distilled acrylic acid composition to a temperature from about 0\u00b0 C. to about 5\u00b0 C. to produce crystals of acrylic acid; g. Partially melting said crystals of acrylic acid to produce a liquid/solid mixture; h. Decanting said liquid/solid mixture to produce a purified acrylic acid solid composition; i. Fully melting said purified acrylic acid composition to produce a purified acrylic acid liquid composition; and j. Determining the acrylic acid purity of said purified acrylic acid liquid composition, and if the purity is less than about 99 wt % acrylic acid, repeating said cooling, partially melting, decanting, and fully melting steps on the purified acrylic acid liquid composition until a purity of about 99 wt % acrylic acid is achieved and said glacial acrylic acid composition is produced.

Metadata:
- Claim Count in Document: 59.0
- Percentile: 86.0
- Lexical Diversity: 1.925
- Patent Class: 562.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15707177', '13760527', '13760483', '13838692', '14511192']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7170317879863899
- 35 USC 102 Novelty (BERT): 0.516581647503839
- Combined Prediction Score: 0.6969867739381348
- Mean Citation Score: 274.67566600000004
- Max Citation Score: 287.36047
- Similarity Product: 214.5916884521073

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

Dataset: test