PATENT CLAIM ANALYSIS

Application Number: 15762868
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["562", "534000"]

Abstract:
The present invention relates to a method for preparing acrylic acid from glycerin. More specifically, the present invention provides a method which can improve the selectivity of acrolein by applying a specific catalyst composition and process conditions to minimize the generation of coke carbon of the catalyst, and can prepare acrylic acid with higher productivity for a longer duration of time because a dehydration reaction can be performed for a longer working period while maintaining catalyst activity at a high level during the reaction.

Claim (Index 1):
A method for preparing acrylic acid comprising the steps of:\n subjecting glycerin to a dehydration reaction in the presence of a catalyst represented by Chemical Formula 1 below and oxygen or air; and carrying out a partial oxidation reaction of acrolein from a product obtained from the dehydration reaction, wherein in the dehydration reaction, a content of oxygen in a gaseous reactant is 3.5 to 12 mol %, and a molar ratio of oxygen to glycerin (oxygen/glycerin) is 1 to 1.75:\n Zr a (M 1 ) b (M 2 ) c W a P e H x O y \u2003\u2003[Chemical Formula 1] \n in Chemical Formula 1, M 1  and M 2  are the same or different, and each independently represent V, Fe, Nb, Zn, or a combination thereof, a, b, c, d, and e represent a composition ratio of the respective atoms, wherein a is 0.1 to 6, b/a is 0 to 1, c/a is 0 to 1, d/a is 0 to 1, and e/a is 0 to 10, among which at least one of b and c is not 0, and x and y are values of 0 to 10 which are determined according to the bonding state of crystallization water.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 1.51724
- Patent Class: 562.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15749472', '15520382', '12988355', '14491433', '14234661']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7542702188021709
- 35 USC 102 Novelty (BERT): 0.5447460023583306
- Combined Prediction Score: 0.7333177971577869
- Mean Citation Score: 329.757746
- Max Citation Score: 395.77475
- Similarity Product: 294.2737163289785

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

Dataset: test