PATENT CLAIM ANALYSIS

Application Number: 16179994
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-05
Patent Classification: ["424", "049000"]

Abstract:
An abrasive type silica with low refractive index and high transparency, a preparation method and an application thereof are disclosed. The preparation method of the present invention includes the following steps: S1, a sodium sulfate solution is added into a reaction tank, the solution is heated to 80-95° C., a sodium silicate solution and a sulfuric acid solution are added at the same time while stirring, the dropping rate of the sodium silicate solution is controlled at 13-15 m 3 /h, the dropping rate of the sulfuric acid solution is controlled to ensure that the pH value of the reaction process is 3.0-4.5, and stirring is continued for 10-15 min after the adding is finished; and S2, the formed silica is filter pressed, washed, spray-dried and airflow crushed to prepare the abrasive type silica with low refractive index and high transparency.

Claim (Index 1):
A method of preparing an abrasive type silica with a low refractive index and a high transparency, comprising the following steps:\n S1, adding 11-13 m 3  sodium sulfate solution to a reaction kettle, heating the sodium sulfate solution to 80-95\u00b0 C., stirring and titrated with 8.5-12 m 3  sodium silicate solution and a sulfuric acid solution to obtain a mixed solution, controlling a dropping rate of the sodium silicate solution as 13-15 m  3  /h, controlling a dropping rate of the sulfuric acid solution to ensure that a pH value of a reaction process is 3.0-4.5, stirring the mixed solution for 10-15 min after an addition of the sodium silicate solution and an addition of the sulfuric acid solution were completed to obtain a silica; S2, filtering, washing the silica to obtain a washed silica, spray-drying, and jet-milling the washed silica to obtain the abrasive type silica with the low refractive index and the high transparency; a modulus of the sodium silicate solution is 2.5-3.0, a concentration of the sodium silicate solution 1.5-3.0.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 98.0
- Lexical Diversity: 1.91358
- Patent Class: 424.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10292986', '10996541', '10997377', '10997376', '10520466']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7066080221035601
- 35 USC 102 Novelty (BERT): 0.5039566910646845
- Combined Prediction Score: 0.6863428889996726
- Mean Citation Score: 197.00539
- Max Citation Score: 226.65086
- Similarity Product: 141.56819256625892

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

Dataset: test