PATENT CLAIM ANALYSIS

Application Number: 15991388
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-05
Patent Classification: ["423", "179500"]

Abstract:
Disclosed is a method of producing high-purity lithium carbonate and barium sulfate from discarded lithium secondary batteries, including: a first process for producing high-purity lithium phosphate from a discarded battery; and a second process for producing lithium sulfate from the lithium phosphate and producing lithium carbonate and barium sulfate from the lithium sulfate. The second process has steps of (a) producing a liquid mixture of lithium phosphate and sulfuric acid, (b) obtaining lithium sulfate by condensing the liquid mixture, (c) dissolving the lithium sulfate in water or a sodium hydroxide aqueous solution, depositing phosphoric acid as lithium phosphate, and performing solid-liquid separation (d) depositing lithium carbonate and performing solid-liquid separation to obtain lithium carbonate, (e) finely grinding the lithium carbonate and classifying the particles, (f) controlling a particle size and shape by dissloving edges of particles or minute particles, (g) performing solid-liquid separation, and (h) depositing barium sulfate.

Claim (Index 4):
The method according to  claim 1 , wherein step (d) is performed at a temperature of 30\u00b0 C. or higher for 20 minutes to 2 hours, concentration of lithium sulfate of the lithium sulfate aqueous solution is 0.3 to 2.4 M and adding sodium carbonate or sodium hydroxide and a carbonic acid gas at an equivalent weight to the lithium sulfate.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 93.0
- Lexical Diversity: 2.39189
- Patent Class: 423.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15991590', '15240792', '15240828', '14045297', '13029908']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7808999872527518
- 35 USC 102 Novelty (BERT): 0.5909874804902499
- Combined Prediction Score: 0.7619087365765016
- Mean Citation Score: 344.19859
- Max Citation Score: 479.6088
- Similarity Product: 455.9280880565642

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test