PATENT CLAIM ANALYSIS

Application Number: 16315240
Application Type: Utility
Filing Date: 2019-01
Publication Date: 2019-05
Patent Classification: ["560", "096000"]

Abstract:
A subject-matter of the invention is a process for the depolymerization of a polyester feedstock comprising opaque PET, the said process comprising at least the stages of conditioning, of depolymerization and of separation of the diol and of separation of the liquid effluent rich in monomers, followed by a decolouration stage.

Claim (Index 1):
Process for the depolymerization of a polyester feedstock comprising opaque PET, the said feedstock comprising from 0.1% to 10% by weight of pigment, the said process comprising at least the following stages:\n a) a conditioning stage fed by the said polyester feedstock; b) a stage of depolymerization by glycolysis fed at least by the effluent from stage a) and by a contribution of diol, carried out at a temperature of between 200 and 400\u00b0 C., with from 1 to 20 mol of diol per mole of diester in the said polyester feedstock and a residence time of the polyester of between 0.1 and 5 h, converting the PET into BHET monomer and BHET oligomers; c) a stage of separation of the diol fed at least by the effluent from stage b), carried out at a temperature of between 100 and 250\u00b0 C., at a lower pressure than that of stage b) and producing a diol effluent and a liquid effluent rich in monomers, carried out in 1 to 5 successive gas/liquid separation sections, the liquid effluent from the preceding section feeding the subsequent section, all of the gas effluents being condensed to form the diol effluent, the liquid effluent resulting from the final gas/liquid separation section constituting the liquid effluent rich in monomers; d) a stage of separation of the liquid effluent rich in monomers resulting from stage c) into a heavy impurities effluent and a prepurified monomers effluent carried out at a temperature of less than 250\u00b0 C. and a pressure of less than 0.001 MPa with a liquid residence time of less than 10 min; and e) a stage of decolouration of the prepurified monomers effluent, carried out at a temperature of between 100 and 250\u00b0 C. and at a pressure of between 0.1 and 1.0 MPa in the presence of an adsorbent and producing a purified monomers effluent.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 99.0
- Lexical Diversity: 1.61765
- Patent Class: 560.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14054425', '14932864', '10868878', '10955297', '14787870']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7012217653286299
- 35 USC 102 Novelty (BERT): 0.5177284544969075
- Combined Prediction Score: 0.6828724342454576
- Mean Citation Score: 194.500478
- Max Citation Score: 206.9556
- Similarity Product: 147.52665358650685

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