Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for separating and recovering phosphonic acid from acetic acid-nitric acid-phosphonic acid waiste liquid

A technology of separation and recovery, phosphoric acid, applied in ammonium orthophosphate fertilizers, chemical instruments and methods, alkaline orthophosphate fertilizers, etc. Effect

Inactive Publication Date: 2011-01-12
芝田 隼次 +2
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, when the mixed acid waste liquid formed by mixing acetic acid, nitric acid, and phosphoric acid is neutralized and then discharged, since the neutralization process produces salts such as acetate and nitrate in the wastewater, it will inevitably cause serious environmental pollution. From the viewpoint of environmental protection, it cannot be said that this kind of neutralization treatment is an ideal means
In addition, the importance of recycling has been called for in recent years in view of the requirements of global environmental protection. However, the conventional neutralization treatment discharge method is a method of discarding waste acid without completely recycling it, so it cannot fully meet the requirements of modern society.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for separating and recovering phosphonic acid from acetic acid-nitric acid-phosphonic acid waiste liquid
  • Method for separating and recovering phosphonic acid from acetic acid-nitric acid-phosphonic acid waiste liquid
  • Method for separating and recovering phosphonic acid from acetic acid-nitric acid-phosphonic acid waiste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] According to the separation and recovery method of the embodiment enumerated in the previous item (with reference to figure 1 ), separating and recovering phosphoric acid from mixed acid wastewater containing acetic acid, nitric acid and phosphoric acid. The mixed-acid wastewater used in this embodiment is the mixed-acid wastewater from the liquid crystal manufacturing plant, and is composed as shown in table 1 (certainly, the mixed-acid wastewater produced from the liquid crystal manufacturing plant is not completely such composition, and various factories etc. different places). Detailed conditions such as the flow rate of each part, the number of stages in each process, and comparison are shown in figure 1 middle. In addition, as an extraction solvent, an extraction solvent having a composition of tris(2-ethylhexyl)phosphate (TOP) / kerosene=50 / 50 (volume ratio) was used. As the kerosene, "Solvessol 150" (trade name) manufactured by Showa Shiel Oil Co., Ltd. was use...

Embodiment 2

[0060] Except using the water that contains 2000ppm NaCl as stripping water, others are separated and recovered phosphoric acid from mixed acid wastewater containing acetic acid, nitric acid and phosphoric acid in the same manner as in Example 1. In addition, the flow rate of each part, the number of stages in each process, and the detailed conditions such as comparison are the same as in Example 1 (refer to figure 1 ).

Embodiment 3

[0062] Except using the water that contains 2000ppm KCl as stripping water, other are separated and recovered phosphoric acid from the mixed acid wastewater containing acetic acid, nitric acid and phosphoric acid in the same manner as in Example 1. In addition, detailed conditions such as the flow rate of each part, the number of stages in each process, and comparison are the same as in Example 1 (see figure 1 ).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A separating and recovering method of the invention comprises an extraction process for selectively dissolving acetic and nitric acids in the extractant solution to extract by mixing the waste liquid containing acetic, nitric and phosphoric acids with the extractant solution containing trialkyl phosphate, a recovery process for recovering phosphoric acid from a residual liquid left by the above extraction process, and a separation process for bringing the obtained acetic / nitric acids-containing extractant solution into contact with a salt-containing water for separation to dissolve and transfer the acetic and nitric acids into above water for separation. The extractant solution can circularly be used by feeding back the oil-phase solution obtained from the separation process to the extraction process. With the method, phosphoric acid can be separated and recovered highly efficiently and selectively from a mixed acid waste liquid containing acetic, nitric and phosphoric acids even in apractical large scale device.

Description

[0001] This application claims the priority of Japanese Patent Application Japanese Patent Application No. 2004-350135 filed on December 2, 2004, and the disclosure thereof constitutes a part of the present application. technical field [0002] The present invention relates to a method for efficiently and selectively separating and recovering phosphoric acid from the acetic acid-nitric acid-phosphoric acid mixed acid waste liquid discharged from the liquid crystal manufacturing process or the semiconductor manufacturing process, etc. A method of recycling the extract by supplying it to the extraction process. Background technique [0003] In the liquid crystal manufacturing and semiconductor manufacturing industries that have developed rapidly in recent years, a variety of waste water flows out during the manufacturing process, but it is discharged after appropriate treatment according to the type and nature of each waste water. For example, mixed acid waste liquid formed by...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/46C02F1/26B01D11/04
CPCB01D11/04C01B25/234C02F1/26C05B7/00
Inventor 芝田隼次山本秀树井上兴一郎小津毅石川香
Owner 芝田 隼次
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com