PATENT CLAIM ANALYSIS

Application Number: 15780725
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["585", "621000"]

Abstract:
A) provision of a feed gas stream a comprising n-butenes; B) introduction of the feed gas stream a comprising n-butenes and an oxygen-comprising gas into a dehydrogenation reactor and oxidative dehydrogenation of n-butenes to butadiene; C) cooling and compression of the product gas stream b in at least one cooling stage comprising a quenching column and in a compression stage comprising a compressor, with the product gas stream b being brought into contact with at least one circulated coolant; D) separation of incondensable and low-boiling gas constituents as gas stream d2 from the gas stream c2 by absorption of the C 4 -hydrocarbons in at least one circulated absorption medium; E) separation of the C 4  product stream d1 by extractive distillation using a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation of the stream e 1  comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a stream f2 comprising butadiene; wherein the measures (i) to (iii) below are carried out (i) avoidance of formation of explosive gas mixtures by monitoring of the oxygen concentration in the oxygen-comprising gas streams fed into the dehydrogenation zone and control of the mass flows of oxygen-comprising gas streams and gas streams comprising hydrocarbons in such a way that no explosive gas mixtures can be formed; (ii) interruption of the introduction of the oxygen-comprising gas mixture into the dehydrogenation zone when a limit value for the oxygen concentration in the dehydrogenation gas mixture is exceeded; (iii) carrying out of the steps A) to F) in apparatuses which are configured so as to be explosion-protected, where liquid-conveying pipes are configured so as to be explosion-protected and gas conduits are configured so as to be detonation-protected.

Claim (Index 29):
An apparatus for carrying out the process for preparing butadiene from n-butenes according to  claim 16 , which comprises:\n A) feed line for providing a feed gas stream a comprising n-butenes; B) feed lines for introducing the feed gas stream a comprising n-butenes and an oxygen-comprising gas into at least one dehydrogenation zone, dehydrogenation zone comprising a dehydrogenation reactor for the oxidative dehydrogenation of n-butenes to butadiene, giving a product gas stream b comprising butadiene, unreacted n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; C) feed line for introducing the product gas stream b into a cooling stage and at least one cooling stage comprising at least one quenching column and at least one compression stage comprising at least one compressor and optionally one or more intermediate coolers between the compressors, where the product gas stream b is brought into contact with at least one circulated coolant to give at least one condensate stream c1 comprising water and a gas stream c2 comprising butadiene, n-butenes, water vapor, oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases; D) facility for separating off incondensable and low-boiling gas constituents comprising oxygen, low-boiling hydrocarbons, possibly carbon oxides and possibly inert gases as gas stream d2 from the gas stream c2 by absorption of the C 4 -hydrocarbons comprising butadiene and n-butenes in at least one circulated absorption medium, giving at least one absorption medium stream loaded with C 4 -hydrocarbons and the gas stream d2, and facility for subsequent desorption of the C 4 -hydrocarbons from the loaded absorption medium stream to give a C 4  product gas stream d1; E) extractive distillation column for separating the C 4  product stream d1 by extractive distillation using a solvent which is selective for butadiene into a stream e1 comprising butadiene and the selective solvent and a stream e2 comprising n-butenes; F) distillation column for distillation of the stream e1 comprising butadiene and the selective solvent to give a stream f1 consisting essentially of the selective solvent and a butadiene-comprising stream f2; wherein one or more of the apparatuses used for carrying out steps A) to F) are configured so as to be explosion-protected, liquid-conveying pipes are configured so as to be explosion-protected and gas conduits are configured so as to be detonation-protected.

Metadata:
- Claim Count in Document: 56.0
- Percentile: 94.0
- Lexical Diversity: 2.65079
- Patent Class: 585.0
- Transitional Phrase Type: half
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15033203', '13752516', '16074454', '15503189', '15523862']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7679076050008499
- 35 USC 102 Novelty (BERT): 0.5209148785111112
- Combined Prediction Score: 0.7432083323518761
- Mean Citation Score: 319.313448
- Max Citation Score: 326.25632
- Similarity Product: 272.72849235977174

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