PATENT CLAIM ANALYSIS

Application Number: 15762224
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["422", "110000"]

Abstract:
The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production plant is not closed while one or more parts of the plant is taken out of operation, rather the input materials and/or reaction products available in the production plant are recirculated through at least one part of the plant that has not been taken out of operation. The invention further relates to a plant for producing isocyanates and to a method for operating a plant for producing isocyanates.

Claim (Index 11):
A process for operating a plant for preparation of isocyanates in the liquid phase, comprising the following plant sections:\n I) a reaction zone comprising\n I.6) a unit for providing an amine, in the form of an amine solution in a solvent, \n I.7) a unit for providing phosgene, in the form of a phosgene solution in a solvent, \n I.8) a unit for providing a solvent, \n I.9) a mixing unit for mixing the amine solution with the phosgene solution and optionally further solvent and \n I.10) a reaction space arranged downstream of the mixing, for conducting the phosgenation, with a separator unit optionally connected downstream, wherein the reaction space or the separator apparatus have optionally been provided with outlet conduits for a liquid stream and a gaseous stream; \n II) a distillation apparatus configured to separate the liquid stream from I) into a liquid stream and a gaseous stream; III) a distillation apparatus configured to separate the liquid stream from II) into a gaseous stream and a liquid stream; IV) a distillation apparatus configured to separate the gaseous stream from III), into a liquid stream and a gaseous stream; V) a distillation apparatus configured to obtain a liquid isocyanate stream from the liquid stream from III), resulting in a gaseous stream comprising secondary components and optionally solvent, and which optionally comprises an upstream unit for polymer removal configured to remove polymeric isocyanate fractions; VI) an absorption apparatus configured to absorb the gaseous streams from I), II) and IV), and solvent to obtain a liquid stream and a gaseous stream; VII) optionally, an absorption apparatus configured to absorb the gaseous stream from VI) in water; VIII) optionally, a workup apparatus for offgas streams, configured to workup offgas streams at least from VII); IX) optionally, an apparatus configured to prepare phosgene, and which is connected to the unit for providing phosgene in I);\n wherein \n in the event of a production stoppage the following steps are run: \n (i) stopping the feed of amine into the mixing unit; \n (ii) if present, switching off the apparatus which is configured to prepare phosgene; \n (iii) reducing the phosgene feed into the mixing unit; \n (iv) reducing the solvent feed into the mixing unit; \n (v) running at least one plant section such that the output stream from the respective plant section\n (v)(i) is recycled into the respective plant section \n or \n (v)(ii) is conducted into a plant section which is upstream or downstream and thence, optionally via further plant sections that have not been shut down, is recycled into the original plant section.

Metadata:
- Claim Count in Document: 30.0
- Percentile: 90.0
- Lexical Diversity: 1.82759
- Patent Class: 422.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15128813', '16325809', '16327443', '15127826', '15762227']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8069378535697889
- 35 USC 102 Novelty (BERT): 0.52253769031737
- Combined Prediction Score: 0.7784978372445469
- Mean Citation Score: 352.980354
- Max Citation Score: 358.66257
- Similarity Product: 264.31844754276403

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

Dataset: test