PATENT CLAIM ANALYSIS

Application Number: 15749426
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["548", "552000"]

Abstract:
This invention relates to an improved process for the selective production of N-methyl pyrrolidone (NMP) from gamma-butyrolactone and monomethyl amine preferably in aqueous form in the presence of a catalyst under comparatively milder conditions than the processes well known in the prior art of literature. The process is economically viable as it provides higher yield and selectivity for NMP which reduces the cost of separation of NMP from GBL. The catalyst shows good recyclability without significant loss in catalytic activity and no frequent regeneration is required.

Claim (Index 11):
A process for the selective production of N-methyl-2-pyrrolidone (NMP) comprising:\n a) reacting feedstock monomethyl amine (MMA) and gamma-butyrolactone (GBL) in a single step in a continuously stirred tank reactor (CSTR) at a molar ratio of MMA to GBL in the range of 1 to 2, in the presence of catalyst consisting of a bronsted acidic support which is a class of zeolitic material with Si0 2  to Al 2 0 3  molar ratio of 70 to 100 having specific surface area of 400 to 500 m 2 /g and modified by oxide of one or metals selected from Al, Zr, W to the percentage of metal loading of 1 to 30 parts by weight of the support with catalyst content between 1 to 10% of total feedstock, at operating condition of temperature 130 to 250\u00b0 C. and pressure 5 to 70 at 500 to 1000 agitator speed, for a period of 30 to 180 minutes to obtain a reaction mixture; b) cooling the reaction mixture to a temperature in the range of 20 to 25\u00b0 C.; c) separating the catalyst from the reaction mixture of step b) by known methods; d) separating the product from reaction mixture of step c) by evaporation or distillation to obtain NMP at selectivity to \u226599% at a conversion of GBL to \u226598%; and e) recycling the catalyst to reactor after repeating the steps a) to d) several times.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 86.0
- Lexical Diversity: 1.33824
- Patent Class: 548.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10495358', '10111452', '14358863', '14650468', '10505706']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7203732966593516
- 35 USC 102 Novelty (BERT): 0.4746010687718586
- Combined Prediction Score: 0.6957960738706023
- Mean Citation Score: 168.13075600000005
- Max Citation Score: 209.80406
- Similarity Product: 176.51396037651062

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

Dataset: test