PATENT CLAIM ANALYSIS

Application Number: 16343679
Application Type: Utility
Filing Date: 2019-04
Publication Date: 2019-08
Patent Classification: ["208", "211000"]

Abstract:
The present invention provides a catalytic gasoline desulfurization method having also an olefin selective removal function, which comprises: when a catalytic gasoline is pre-hydrotreated, cutting into a light fraction, a middle fraction and a heavy fraction; performing liquid-liquid extraction desulfurization treatment on the middle fraction to produce a sulfur-poor oil and a rich solvent containing sulfur-rich oil; the light fraction back-extracting the rich solvent, using C5 olefin therein to replace a macromolecular acyclic olefin in the sulfur-rich oil, so as to gather together C5 iso-olefins, cycloolefins, aromatic hydrocarbons and sulfides in the sulfur-rich oil; performing hydrogenation, olefin-reduction and desulfurization treatment on the heavy fraction together with the sulfur-rich oil removed from the back-extracted rich solvent to saturate the olefin therein; and finally, preparing together with the sulfur-poor oil to produce a full range gasoline. The sulfur-content of the catalytic gasoline produced by the method of the present invention can be reduced to 10 ppm or less, the olefin content of the catalytic gasoline can be reduced to 22%, the olefin is saturated by up to 8 percentage, and the RON loss of the full range gasoline is 1.5 or less, so that while reducing the olefin content of the catalytic gasoline, it ensures the less octane number loss, thereby satisfying the olefin-reduction requirements upgraded in the gasoline National VI Standard for ethanol-gasoline supply area enterprises.

Claim (Index 5):
The method according to  claim 4  wherein, the back-extraction stated in the step 3) is carried out in said extracting desulfurization tower, said light fraction is fed from the lower part of the extracting desulfurization tower, and the feed ratio of the light fraction to the middle fraction is controlled to be 0.1-0.5.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 100.0
- Lexical Diversity: 2.17544
- Patent Class: 208.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14684196', '14940027', '14929247', '10095295', '14931690']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7350789029434887
- 35 USC 102 Novelty (BERT): 0.570745840599197
- Combined Prediction Score: 0.7186455967090595
- Mean Citation Score: 329.010632
- Max Citation Score: 426.90808
- Similarity Product: 298.2414173746013

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