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 9):
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 fineness of the phosphate rock powder in step (1) is from 80 to 100 meshes and the phosphorus pentoxide content in the phosphate rock powder is from 10 to 40% by mass fraction.

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): 0.8123417367672743
- 35 USC 102 Novelty (BERT): 0.5690533532076127
- Combined Prediction Score: 0.7880128984113082
- Mean Citation Score: 335.13012600000013
- Max Citation Score: 513.0573
- Similarity Product: 339.79249339029195

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