PATENT CLAIM ANALYSIS

Application Number: 15970004
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["210", "639000"]

Abstract:
A method is disclosed for use in reducing chemical oxygen demand (COD) of alkaline wastewater generated from an aldol condensation reaction during a process for preparing 2-ethylhexanol, which teaches both high-boiling-point aldol mixtures and low-boiling-point aldol mixtures are used to serve as an extractant for reducing COD in the wastewater, and further to perform a stripping treatment, thereby a removal rate of COD in the wastewater of 89-93% is then achieved.

Claim (Index 1):
A method for reducing chemical oxygen demand of wastewater from preparation of 2-ethylhexanol, comprising steps of:\n 1) taking a high-boiling-point aldol mixture by-produced in the preparation of 2-ethylhexanol as a first extractant containing the following components with a total weight percent of 100%:\n a) an alcohol or an aldehyde having 4 carbon atoms, 0-5 wt %; \n b) an alcohol or an aldehyde having 8 carbon atoms, 20-25 wt %; \n c) an alcohol or an aldehyde having at least 9 carbon atoms, 70-80 wt %; and \n d) water, 0-1 wt %; \n 2) taking a low-boiling-point aldol mixture by-produced in the preparation of 2-ethylhexanol as a second extractant containing the following components with a total weight percent of 100%:\n a) n-butanol, 60-70 wt %; \n b) an alcohol or an aldehyde having 4 carbon atoms, 0-5 wt %; \n c) an alcohol or an aldehyde having 8 carbon atoms, 10-20 wt %; \n d) an alcohol or an aldehyde having at least 9 carbon atoms, 0-5wt %; and \n e) water, 5-15wt %; \n 3) adding an inorganic acid to alkaline wastewaters produced from process for preparing of 2-ethylhexanol, to make the wastewater having a pH value of 0-4, wherein the inorganic acid is one or more selected from hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid; 4) extracting the wastewater acidized in Step 3) with the first extractant of Step 1), wherein a weight ratio of the first extractant to the wastewater ranges from 1:1 to 1:12; 5) extracting the acidized wastewater extracted in Step 4) with the second extractant of Step 2), wherein a weight ratio of the second extractant to the wastewater ranges from 1:1 to 1:45; and 6) introducing the acidified wastewater after extracted in Step 5) to a distillation column from top entering therein to meet a stripping medium entering the distillation column from bottom such that stripping happens at an operation temperature of 80-180\u00b0 C. and a pressure of 0.5-4.5 kg/cm 2 , thereby achieving a removal rate of COD in the wastewater of 89-93%, wherein the stripping medium for the stripping is steam or an inert gas.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 1.41818
- Patent Class: 210.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12088777', '11401429', '11144590', '15538922', '12889065']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7727063929155606
- 35 USC 102 Novelty (BERT): 0.495202016536347
- Combined Prediction Score: 0.7449559552776392
- Mean Citation Score: 193.25393
- Max Citation Score: 242.25215
- Similarity Product: 170.2021448532939

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