PATENT CLAIM ANALYSIS

Application Number: 16095785
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-05
Patent Classification: ["210", "638000"]

Abstract:
The present application discloses a method for producing acrylate with low pollutant discharge. The method has the advantages of high raw material utilization efficiency, low concentration, low salinity and low toxicity of wastewater pollutant, easy treatment of wastewater and etc.

Claim (Index 11):
A method for producing acrylates with low pollutant discharge comprising the following steps:\n (1) subjecting an acrylic acid, a catalyst and an alcohol to an esterification reaction in an esterification reactor to produce an esterified product; (2) washing the esterified product of step (1) with water to recover the catalyst and the unreacted acrylic acid, and recycling the recovered catalyst and the unreacted acrylic acid back to the esterification reactor; (3) washing the esterified product with an alkali after water washing to further remove the organic acid in the product; (4) rectifying the esterified product after the alkali washing, and removing the light components and the heavy components to obtain a product; wherein the method further comprises: (5) collecting a wastewater phase containing wastewater produced by alkali washing, and recovering alcohols and esters in the wastewater phase; (6) treating the wastewater produced after recovering the alcohols and the esters in step (5) by a multi-stage bipolar membrane electrodialysis system to recover the organic acid solution and the alkali solution therein, wherein the multistage bipolar membrane electrodialysis systems are multiple bipolar membrane electrodialysis devices using the same type of the membrane stack structure, wherein the bipolar membrane electrodialysis membrane stacks employ a structure in which a bipolar membrane-an anion exchange membrane-a cation exchange membrane are alternately arranged, the initial solution in the feed chamber of each stage device is the pretreated acrylate wastewater; the initial solution in the acid chamber of the first stage device is desalted water or a solution containing the corresponding catalyst, and the initial solution in the alkali chamber is desalted water or sodium hydroxide solution; the initial solution in the acid chamber of the subsequent device is organic acid solution recovered in the device of the previous stage, and the initial solution in the alkali chamber is the alkali solution recovered in the device of the previous stage; or wherein the bipolar membrane electrodialysis membrane stacks employ a structure in which an anion exchange membrane and a bipolar membrane are alternately arranged, the initial solution in the feed chamber of each stage device is the pretreated acrylate wastewater; the initial solution in the acid chamber of the first stage device is desalted water or a solution containing the corresponding catalyst; the initial solution in the acid chamber of the subsequent device is organic acid solution recovered in the device of the previous stage; (7) subjecting the recovered organic acid solution to an acidification treatment, followed by a dehydration treatment, and then recycling back to the esterification reactor of step (1) for esterification reaction.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 97.0
- Lexical Diversity: 1.40625
- Patent Class: 210.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15139895', '14760635', '10794231', '12084118', '15490549']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7603365702259267
- 35 USC 102 Novelty (BERT): 0.5099612135372151
- Combined Prediction Score: 0.7352990345570556
- Mean Citation Score: 241.61594800000003
- Max Citation Score: 289.6567
- Similarity Product: 224.10245070148707

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