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

Method of simultaneously measuring the contents of OH- and sulfides in sulfur-bearing wastewater

A technology for hydroxide and sulfide, applied in the field of analysis and detection, can solve the problem of simultaneous determination of hydroxide and sulfide, and achieve the effects of high accuracy, low analysis cost, and simple and easy operation

Inactive Publication Date: 2019-03-01
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for simultaneous determination of hydroxide and sulfide content in sulfur-containing wastewater to solve the problem that the existing sulfur-containing wastewater cannot simultaneously measure hydroxide and sulfide

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 of simultaneously measuring the contents of OH- and sulfides in sulfur-bearing wastewater
  • Method of simultaneously measuring the contents of OH- and sulfides in sulfur-bearing wastewater
  • Method of simultaneously measuring the contents of OH- and sulfides in sulfur-bearing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 of the present invention provides a method for simultaneously measuring hydroxide and sulfide content in sulfur-containing wastewater. Get a 5ml wastewater sample, and the anion in the wastewater sample has OH - , S 2- , SO 3 2- , S 2 o 3 2- , add the BaCl that concentration is 5% (mass to volume ratio) in the waste water sample 2 10ml of the solution, let stand at room temperature for 10min, filter the supernatant to obtain the wastewater clear solution;

[0026] Add deionized water to 100ml in the waste water clear liquid to obtain the waste water dilution;

[0027] Add 4-6 drops of thymolphthalein indicator with a concentration of 0.1% (mass to volume ratio) dropwise in the wastewater dilution, and then titrate with a 0.1mol / L HCl standard solution until the color of the wastewater dilution changes from blue to If it is colorless, record the volume V of the HCl standard solution consumed for the first time 1 24ml;

[0028] Add 4-6 drops of methy...

Embodiment 2

[0038] Embodiment 2 of the present invention provides a method for simultaneously measuring hydroxide and sulfide content in sulfur-containing wastewater. Get a 10ml wastewater sample, and the anion in the wastewater sample has OH - , S 2- , S 2 o 3 2- , SO 4 2- , CO 3 2- , add the BaCl that concentration is 10% (mass to volume ratio) in the waste water sample 2 10ml of the solution, let stand at room temperature for 10min, filter the supernatant to obtain the wastewater clear solution;

[0039] Add deionized water to 100ml in the waste water clear liquid to obtain the waste water dilution;

[0040] Add 4-6 drops of thymolphthalein indicator with a concentration of 0.1% (mass to volume ratio) dropwise in the wastewater dilution, and then titrate with a 0.05mol / L HCl standard solution until the color of the wastewater dilution changes from blue to If it is colorless, record the volume V of the HCl standard solution consumed for the first time 1 17ml;

[0041] Add 4-6...

Embodiment 3

[0051] Embodiment 3 of the present invention provides a method for simultaneously measuring hydroxide and sulfide content in sulfur-containing wastewater. Get a 20ml wastewater sample, and the anion in the wastewater sample has OH - , S 2- , S 2 o 3 2- , SO 4 2- , add the BaCl that concentration is 10% (mass to volume ratio) in the waste water sample 2 20ml of the solution, let stand at room temperature for 10min, filter the supernatant to obtain the wastewater clear solution;

[0052] Add deionized water to 100ml in the waste water clear liquid to obtain the waste water dilution;

[0053] Add 4-6 drops of thymolphthalein indicator with a concentration of 0.1% (mass to volume ratio) dropwise in the wastewater dilution, and then titrate with a 0.05mol / L HCl standard solution until the color of the wastewater dilution changes from blue to If it is colorless, record the volume V of the HCl standard solution consumed for the first time 1 6.4ml;

[0054] Add 4-6 drops of m...

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 a method of simultaneously measuring the contents of OH- and sulfides in sulfur-bearing wastewater, which particularly includes: 1) adding a BaCl2 solution to a wastewater sample and allowing the solution to stand for 5-10 min, and filtering the solution to obtain a supernatant; 2) adding deionized water to the supernatant to 100 ml in volume, thus preparing a wastewater diluent; 3) dropwise adding 4-6 drops of a thymolphthalein indicator to the wastewater diluent and performing titration by using a HCl standard solution until the color of the wastewater diluent turns from blue to colorlessness, and recording the volume (V1) of the HCl standard solution consumed in the first time; 4) dropwise adding 4-6 drops of a methyl orange indicator, and performing titration byusing a HCl standard solution until the color of the wastewater diluent turns from yellow into red, and recording the volume (V2) of the HCl standard solution consumed in the second time; 5) according to an equation, respectively calculating the contents of OH- and sulfides in the wastewater. In the invention, for the first time, the sulfides in sulfur-bearing wastewater are measured by means ofthe acid titration method; the method is simple and has high analysis speed.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for simultaneously measuring the contents of hydroxide and sulfide in sulfur-containing wastewater. Background technique [0002] In the process of petroleum processing, NaOH is often used to absorb the H produced in catalytic cracking, hydrofining, ethylene production and other reactions. 2 S gas produces a large amount of sulfur-containing wastewater; these wastewater contains higher concentrations of sulfide and sodium hydroxide, its pH value is about 12-13, and its COD is also higher. Therefore, if the sulfur-containing wastewater is not properly treated and is directly discharged into the sewage treatment system, it will have a great impact on the sewage treatment system and seriously affect the normal operation of the sewage treatment system. In the process of sewage treatment, the indicators in the water quality must be analyzed to facilitate the o...

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 Applications(China)
IPC IPC(8): G01N21/78G01N1/38
CPCG01N1/38G01N21/78
Inventor 吴素芳沈寒晰张金峰张丽娜刘彦婷
Owner SHAANXI RES DESIGN INST OF PETROLEUM 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