PATENT CLAIM ANALYSIS

Application Number: 15744239
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["560", "347000"]

Abstract:
The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in a stoichiometric excess in the gas phase, wherein the excess phosgene is subsequently recovered and recirculated back into the reaction. The present invention relates in particular to a method for the feedback-controlled recirculation of the recovered phosgene, particularly when the phosgene stream that should be recovered is distributed between multiple gas-phase reactors operated in parallel.

Claim (Index 1):
A continuous process for preparing an isocyanate by gas phase phosgenation of the corresponding primary amine, comprising:\n reacting the primary amine with an excess of phosgene to obtain a process product; (ii) treating the process product with a solvent at a temperature which is below the boiling point of the isocyanate and above the decomposition temperature of the corresponding carbamoyl chloride to give a gaseous stream (ii-1) containing hydrogen chloride and unreacted phosgene and a liquid stream (ii-2) containing solvent and isocyanate; (iii) separating the hydrogen chloride and phosgene present in the stream (ii-1) to give a liquid phosgene-containing stream (iii-1) and a gaseous stream (iii-2) containing hydrogen chloride; (iv) partially vaporizing the liquid phosgene-containing stream (iii-1) to give a two-phase process product; (v) introduction of introducing the two-phase process product at the top of a distillation column, from which a gaseous phosgene-containing stream is taken off at the top; (vi) recirculating the gaseous phosgene-containing stream to step (i); and (vii) working up the liquid stream (ii-2) containing solvent and isocyanate to isolate the isocyanate.

Metadata:
- Claim Count in Document: 19.0
- Percentile: 86.0
- Lexical Diversity: 1.5
- Patent Class: 560.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16327443', '16325809', '14058765', '15762224', '12378508']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7275862950383797
- 35 USC 102 Novelty (BERT): 0.5320265992108949
- Combined Prediction Score: 0.7080303254556313
- Mean Citation Score: 270.884234
- Max Citation Score: 290.9804
- Similarity Product: 262.38703981502056

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