PATENT CLAIM ANALYSIS

Application Number: 16206750
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-03
Patent Classification: ["405", "128500"]

Abstract:
Disclosed is a biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium site and soil remediation agent. The method is applied to chromium-containing soil by formulating biogas residue, a carbon source and a sulfate into said soil remediation agent. Special construction and maintenance methods are adopted to achieve effective reduction of hexavalent chromium in deep contaminated soil. Therefore, the biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium-containing sites cannot only be used to remediate chromium-containing sites deep in depth at a low cost and high efficiency, but also achieve recycled utilization of waste by treating waste with one another, thereby possessing significant value in promotion and practice.

Claim (Index 1):
A biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium-containing site, comprising:\n (1) mixing sulfate with the biogas residue or a carbon source solution at such a ratio, that contents of dry biogas residue, solid and organic carbon are respectively 0.1-20%, 0.5-25% and 0.5-25% to obtain a mixed solution; wherein a mass ratio of sulfate (SO 4 2 ) to the organic carbon is (0-1):1; reacting the mixed solution for 0-5 days to obtain a chromium-containing soil remediation agent; (2) excavating 1-10 m soil from a surface of the chromium-containing site, laying a geomembrane with mesh at a bottom of the excavated site, and laying an impervious material around the excavated site to build a semi-closed stockyard; (3) breaking the soil of step (2) to less than 10 mm, tiling the broken soil on the semi-closed stockyard, mixing the tiled soil with the chromium-containing soil remediation agent and ferrous sulfate by spraying; wherein a mixing ratio between the ferrous sulfate, the tiled soil and the chromium-containing soil remediation agent is (0-0.1):1:(0.1-0.8); entering a stockpiling period; and (4) maintaining a moisture content of the soil in a range of 5-60% in initial 5-100 days during the stockpiling period, and injecting the chromium-containing soil remediation agent or the carbon source solution into the site every 1-200 days, such that a ratio of cumulative organic carbon from the repeatedly injected chromium-containing soil remediation agent or the carbon source solution to a total Cr (VI) content in the entire site is not less than 0.5:1; wherein the site has an average annual rainfall of more than 200 mm, otherwise spraying the surface of the site with water or organic solution to allow the chromium-containing soil remediation agent to continuously seep into a lower layer of the site.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 98.0
- Lexical Diversity: 1.64
- Patent Class: 405.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16206759', '10844864', '11756387', '11395453', '13005705']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7558647415971362
- 35 USC 102 Novelty (BERT): 0.5438685102182536
- Combined Prediction Score: 0.734665118459248
- Mean Citation Score: 261.69570400000003
- Max Citation Score: 395.97836
- Similarity Product: 367.9955099558592

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