PATENT CLAIM ANALYSIS

Application Number: 15765496
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-03
Patent Classification: ["562", "600000"]

Abstract:
A process for the recovery of polymer-grade (meth)acrylic acid, in the absence of organic solvent, from a gaseous reaction mixture comprising (meth)acrylic acid obtained by gas-phase oxidation of a precursor of the (meth)acrylic acid, the process carried out in a plant comprising at least one dehydration column and one finishing column, being characterized by the presence of at least one chemical treatment agent targeted at reducing the content of residual aldehydes. (Meth)acrylic acid obtained according to the invention meets criteria of high quality allowing it to be used in the manufacture of acrylic polymers, in particular for superabsorbents. This grade is also known as glacial acrylic acid GAA.

Claim (Index 1):
A process for the recovery of polymer-grade (meth)acrylic acid, in the absence of organic solvent, from a gaseous reaction mixture comprising (meth)acrylic acid obtained by gas-phase oxidation of a precursor of the (meth)acrylic acid, comprising at least the following stages:\n i) subjecting the gaseous reaction mixture to dehydration without using azeotropic solvent in a first distillation column, referred to as dehydration column, resulting in a top stream, at least a portion of which is condensed and sent back to the dehydration column in the form of reflux, and in a bottom stream; ii) subjecting the dehydration column bottom stream at least in part, to distillation in a second column, referred to as finishing column, resulting in a top stream and in a bottom stream comprising heavy compounds; iii) recovering a purified (meth)acrylic acid stream by drawing off a sidestream from the finishing column; wherein said process is carried out in the presence of at least one agent for the chemical treatment of the aldehydes for reducing content of residual aldehydes.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 91.0
- Lexical Diversity: 1.72973
- Patent Class: 562.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15556308', '15118126', '12439620', '15658677', '13469215']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.733989024987735
- 35 USC 102 Novelty (BERT): 0.5368212214536318
- Combined Prediction Score: 0.7142722446343247
- Mean Citation Score: 314.6904760000001
- Max Citation Score: 370.35394
- Similarity Product: 334.2991004539228

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

Dataset: test