PATENT CLAIM ANALYSIS

Application Number: 15760851
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["423", "172000"]

Abstract:
Provided is a method for producing phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum including: adding a phosphate rock powder and a part of dilute sulfuric acid into an extraction tank, carrying out an extraction reaction on same, separating a clear liquid from the obtained mixed slurry, sending the clear liquid, as a finished product phosphoric acid, into an acid storeroom, and transferring a separated solid, together with the rest mixed slurry, into a crystal transformation tank; and adding sulfuric acid and a crystal transformation agent into the crystal transformation tank, carrying out a crystal transformation reaction for 1.5-7.5 h at 60° C.-130° C., and solid-liquid separating the obtained mixed acid slurry, wherein the solid can be dried into a gypsum powder, or may be not subjected to a drying step and made into gypsum products such as gypsum boards, gypsum building blocks and gypsum members by directly adding water.

Claim (Index 10):
The method for producing wet-process phosphoric acid and at the same time obtaining alpha-hemihydrate gypsum as by-product according to  claim 8 , wherein the mass concentration of diluted sulfuric acid in steps (1) and (3) is from 20 to 40%, more preferably from 20 to 35%.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 90.0
- Lexical Diversity: 1.97647
- Patent Class: 423.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15760822', '10362845', '16312906', '13055891', '15300822']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8121540124678547
- 35 USC 102 Novelty (BERT): 0.5697820775739498
- Combined Prediction Score: 0.7879168189784642
- Mean Citation Score: 335.13012600000013
- Max Citation Score: 513.0573
- Similarity Product: 343.26886520351184

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