PATENT CLAIM ANALYSIS

Application Number: 15743132
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-04
Patent Classification: ["562", "515000"]

Abstract:
A process for the isolation of levulinic acid including the following steps: a. performing acid catalyzed hydrolysis of a C6 carbohydrate-containing feedstock to obtain reaction product X, b. purifying of reaction product X to provide a composition  1,  comprising at least 75 wt. % levulinic acid, at most 15 wt. % solvent and at most 10 wt. % impurities, based on the total weight of composition  1,  c. feeding composition  1  to a melt crystallization cycle, d. repeating the melt crystallization cycle as many times as necessary to obtain as composition 2 a levulinic acid with a predetermined purity, and e. isolating the levulinic acid with a predetermined purity.

Claim (Index 3):
The process according to  claim 1 , wherein the melt crystallization cycle comprises the following steps:\n i. Feeding composition  1  to a melt crystallizer wherein composition  1  is cooled to at least one temperature Tc, wherein Tc (\u00b0 C.)=1.23.(W1)\u2212(a value between 94.5 and 109.5) to crystallize the levulinic acid, wherein W1 is the weight % of levulinic acid in composition  1 , ii. Draining a liquid  1 , wherein liquid  1  is 30-80 wt. % of composition  1 , based on the total weight of composition  1 , iii. Treating the crystals obtained in step i, after draining liquid  1 , at at least one temperature Tw (\u00b0 C.)=1.23.(W1)\u2212(a value between 84.5 and 101.5) to partly melt the crystals and to obtain a liquid  2 , wherein W1 is the weight % of levulinic acid in composition  1 , iv. Draining liquid  2 , wherein liquid  2  is 5-50 wt % of composition  1 , based on the total weight of composition  1 , v. Melting the crystals obtained according to step iii, after draining of liquid  2 , at at least one temperature Tm (\u00b0 C.)=1.23.(W1)\u2212(a value lower than 84.5) to obtain a composition  2 , wherein W1 is the weight % of levulinic acid in composition  1 .

Metadata:
- Claim Count in Document: 23.0
- Percentile: 86.0
- Lexical Diversity: 1.86154
- Patent Class: 562.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15767465', '15743093', '13147643', '15525415', '15774722']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.732753539849799
- 35 USC 102 Novelty (BERT): 0.5586786384349104
- Combined Prediction Score: 0.7153460497083102
- Mean Citation Score: 281.079046
- Max Citation Score: 422.9488
- Similarity Product: 341.6279885243416

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