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

On-line analysis equipment for alkalinity of working solution in preparation of hydrogen peroxide by anthraquinone process and use method thereof

An analytical equipment, hydrogen peroxide technology, applied in chemical instruments and methods, program control in sequence/logic controllers, analytical materials, etc., can solve problems that cannot reflect the true pH of the working fluid, production has no guiding significance, and discrete to achieve continuous online analysis, reduce labor intensity, and achieve accurate and reliable results

Pending Publication Date: 2021-06-04
LIMING RES INST OF CHEM IND
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual operation process, due to the complex composition of the working fluid, the pH value measured by this method cannot better reflect the real pH of the working fluid, and the dispersion is very large, which has no guiding significance for production

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
  • On-line analysis equipment for alkalinity of working solution in preparation of hydrogen peroxide by anthraquinone process and use method thereof
  • On-line analysis equipment for alkalinity of working solution in preparation of hydrogen peroxide by anthraquinone process and use method thereof
  • On-line analysis equipment for alkalinity of working solution in preparation of hydrogen peroxide by anthraquinone process and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, an online analysis device for preparing the alkalinity of working fluid in hydrogen peroxide by anthraquinone method includes a mixing chamber 4, which is provided with a stirring device and has a conical bottom; the upper part of the mixing chamber 4 is quantitatively fed by working fluid The control valve 2 is connected to the working fluid pipeline 1, and the pure water quantitative control valve 3 is connected to the water source through the mixing chamber; the liquid discharge pipe at the bottom of the mixing chamber 4 is provided with a two-position three-way solenoid valve 5, and one of the three-way solenoid valves drains to waste Pipeline, one discharges liquid to the measurement chamber 9; the upper part of the measurement chamber 9 is provided with a measurement chamber pure water quantitative control valve 6, which is connected in parallel to the buffer liquid tank 14 through the buffer liquid quantitative control valve 7; the inter...

Embodiment 2

[0037] A certain 100,000 tons / year (27.5%) hydrogen peroxide plant is installed with an online analyzer for the alkalinity of the working fluid, and the alkalinity of the working fluid is measured on-line every 2 hours. Among them, 200mL of working solution and 100mL of pure water were taken each time, stirred for 1min, allowed to stand for 3min to stratify, and the pH value of the aqueous phase after stratification was tested online.

[0038] At the same time, the operator goes to the site to take samples at the same time as the online analyzer every 2 hours. The alkalinity of the samples is measured by the offline method in the laboratory, and the pH value is measured by the on-site alkalinity online analyzer, and the linear fitting curve is used Calculate its alkalinity. The experimental results are shown in Table 1.

[0039] Table 1 Comparison of offline test alkalinity value and linear fitting curve alkalinity calculation value.

[0040] Table 1 Comparison of offline test...

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

The invention discloses on-line analysis equipment for alkalinity of a working solution in preparation of hydrogen peroxide by an anthraquinone process and a use method thereof. The on-line analysis equipment comprises a mixing chamber, the bottom of the mixing chamber is conical, and the upper part of the mixing chamber is connected with a working solution pipeline through a working solution quantitative feeding control valve and is connected with a water source through a mixing chamber pure water quantitative control valve; a two-position three-way electromagnetic valve is arranged on a liquid discharge pipe at the bottom of the mixing chamber, one branch of the three-way electromagnetic valve discharges liquid to a waste liquid pipeline, and the other branch of the three-way electromagnetic valve discharges liquid to a measuring chamber; the upper part of the measuring chamber is provided with a measuring chamber pure water quantitative control valve and is connected with a buffer solution tank through a buffer solution quantitative control valve in parallel; a feeding pipe in the measuring chamber is provided with a high-pressure rotary nozzle, and the bottom of the measuring chamber is connected to a waste liquid pipeline through a two-position blow-down valve; and the lower part of the measuring chamber is sequentially connected with an alkalinity detection device, a signal acquisition, processing and transmission device and a DCS data control center. The pH value of the extracted water phase of the working solution is measured by a pH meter, the real alkalinity of the working solution is reflected, and the result is accurate and reliable and is not influenced by human factors.

Description

technical field [0001] The invention belongs to the technical field of preparing hydrogen peroxide by anthraquinone method. Background technique [0002] The anthraquinone method for producing hydrogen peroxide uses anthraquinone compounds as the carrier of the working fluid to react hydrogen and oxygen under certain conditions to form hydrogen peroxide. The main production processes include hydrogenation process, oxidation process, extraction process and post-treatment process. In order to reduce the content of hydrogen peroxide in the working fluid of the hydrogenation system and ensure the regeneration effect of anthraquinone degradation products in the working fluid, the working fluid after the post-treatment process needs to reach a certain weak alkalinity. [0003] The alkalinity analysis of the working solution in the traditional anthraquinone method to prepare hydrogen peroxide is an acid-base titration method, and the analysis frequency is once an hour. Manual on-s...

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
IPC IPC(8): C01B15/023G01N33/00G05B19/05
CPCC01B15/023G01N33/00G05B19/054
Inventor 张晓斌黄晓宇赵晓东王波曹国平
Owner LIMING RES INST OF CHEM IND
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