PATENT CLAIM ANALYSIS

Application Number: 15958986
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-10
Patent Classification: ["210", "639000"]

Abstract:
The present invention relates to the waste water treatment field, and discloses apparatus and method for treating waste water containing ammonium salts, which contains NH 4 + , SO 4 2− , Cl − , and Na + . In the method of the present invention, the pH value of the waste water to be treated is adjusted to a specific range in advance; sodium sulfate crystal and relatively concentrated ammonia are obtained by first evaporation, and then sodium chloride crystal and relatively dilute ammonia is obtained by second evaporation; alternatively, sodium chloride crystal and relatively concentrated ammonia is obtained by third evaporation, and then sodium sulfate crystal and relatively dilute ammonia are obtained by fourth evaporation. The method of the present invention can recover ammonia, sodium sulfate, and sodium chloride from the waste water respectively, so that the resources in the waste water can be reused as far as possible.

Claim (Index 18):
A method for treating waste water containing ammonium salts that contains NH 4 + , SO 4 2\u2212 , Cl \u2212  and Na + , comprising the following steps:\n 1) treating waste water to be treated by third evaporation, to obtain third ammonia-containing vapor and third concentrated solution that contains sodium chloride crystal, wherein the waste water to be treated contains the waste water containing ammonium salts; 2) treating the third concentrated solution that contains sodium chloride crystal by third solid-liquid separation, and treating the liquid phase obtained in the third solid-liquid separation by fourth evaporation, to obtain fourth ammonia-containing vapor and fourth concentrated solution that contains sodium sulfate crystal; 3) treating the fourth concentrated solution that contains sodium sulfate crystal by fourth solid-liquid separation; wherein the pH of the waste water to be treated is adjusted to a value greater than 9, before the waste water to be treated is treated by the third evaporation; the fourth evaporation ensures that the sodium chloride doesn't crystalize and precipitate; in relation to 1 mol SO 4 2\u2212  contained in the waste water to be treated, the Cl \u2212  contained in the waste water to be treated is 7.15 mol or more.

Metadata:
- Claim Count in Document: 62.0
- Percentile: 91.0
- Lexical Diversity: 2.21622
- Patent Class: 210.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15807252', '16060446', '10346896', '13876445', '14083200']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8158190453912852
- 35 USC 102 Novelty (BERT): 0.5045499331572021
- Combined Prediction Score: 0.784692134167877
- Mean Citation Score: 263.593112
- Max Citation Score: 304.83612
- Similarity Product: 253.43149486876487

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