Novel production process of polyferric chloride

A technique for polymerizing ferric chloride and ferrous chloride, applied in ferric halides, chemical instruments and methods, separation methods, etc., can solve the problems of violent reaction, high production cost, high cost of chlorate direct oxidation method, etc., and achieve high quality High, long storage time effect

Active Publication Date: 2010-11-24
BEIJING ZIGUANG YINGLI CHEM TECH CO LTD
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method for preparing polyferric chloride mainly adopts direct oxidation method and catalytic oxidation method. There are many patents and documents in its preparation, but there are certain disadvantages in various methods: the cost of direct oxidation method of chlorate is too high; sodium nitrite Catalytic oxidation emits toxic NO x Gas, t

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
  • Novel production process of polyferric chloride
  • Novel production process of polyferric chloride
  • Novel production process of polyferric chloride

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] Take 40ml of the pickling waste liquid from the pickling section of the steel plant (the pickling waste liquid is taken from a steel plant, and the appearance is a yellow-green clear liquid with a sour taste, [H + ]=9.8mol / L, total iron content is 154.9g / L, of which ferric ion content is 149.1g / L, HCl acidity is 12.07%) added to a three-necked flask for reaction. Inject continuously stable HCl gas into the pickling waste liquid. The other mouth of the three-necked bottle is connected to a buffer bottle to prevent back suction. After the buffer bottle, use the pickling waste liquid for circular absorption.

[0030] In order to prevent the reaction from being too rapid, HCl gas was introduced slowly and stably while stirring the waste pickling liquid for full absorption. Depending on the aeration rate, about 20 to 60 minutes, yellow-green crystals were continuously precipitated in the waste pickling liquid. HCl gas is continuously introduced and cooled to 1...

Example Embodiment

[0032] Example 2

[0033] Take 40ml of the pickling waste liquid from the pickling section of the steel plant (the pickling waste liquid is taken from a steel plant, the appearance is a yellow-green clear liquid with a sour taste, and the total iron content is 154.9g / L) and add it to a three-necked bottle. In the same way as in Example 1, HCl gas was introduced for pretreatment. After treatment, 16.33g of ferrous chloride crystals (not dried) are added to 100ml of water to stir and dissolve, firstly add 0.64g of iron filings to adjust Fe total / Cl - Then add 0.86g sodium dihydrogen phosphate stabilizer to adjust P / Fe total Continue to stir and mix, and then add 0.7g of sodium nitrite solid at one time, and pass in air or oxygen; start heating, keep it at 50°C for reaction. At the same time, open the forced gas circulation system centered on the gas buffer tank, and the system is full of red-brown NO 2 Gas, polymerization reaction occurs, the reaction lasts for about 1.5 to 2 hour...

Example Embodiment

[0034] Example 3

[0035] Take 40ml of the pickling waste liquid from the pickling section of the steel plant (the pickling waste liquid is taken from a steel plant, the appearance is a yellow-green clear liquid with a sour taste, and the total iron content is 154.9g / L) and add it to a three-necked bottle. In the same way as in Example 1, HCl gas was introduced for pretreatment. After treatment, 16.33g of ferrous chloride crystals (not dried) are added to 100ml of water to stir and dissolve, firstly add 0.64g of iron filings to adjust Fe total / Cl - Then add 0.86g sodium dihydrogen phosphate stabilizer to adjust P / Fe total Continue to stir and mix well, then add 0.7g of sodium nitrite solid in two batches, 0.35g for each batch, with an interval of 0.5 hours, pass in air or oxygen; start heating, and keep at 50℃ for reaction. At the same time, open the forced gas circulation system in the system centered on the gas buffer tank, and the system is full of red-brown NO 2 Gas, polymer...

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 relates to a production process of polyferric chloride, which takes ferrous chloride as a raw material and adopts a catalytic oxidation method of sodium nitrite to produce the polyferric chloride. The process is characterized in that a gas forced circulation system which takes a gas buffer tank as a center is added in the process; and the sodium nitrite catalytic oxidation method is used to produce the polyferric chloride. The process well solves the problem of the processes and projects for producing the polyferric chloride in traditional methods. The prepared polyferric chloride has good flocculation property, is easy to be stored for a long time, and can be widely applied to the treatment of waste water.

Description

technical field [0001] The invention relates to a new process for preparing polyferric chloride by using ferrous chloride as a raw material and adopting a sodium nitrite circular catalytic oxidation method. Background technique [0002] In the steel processing industry, it is often necessary to clean the surface of steel parts with hydrochloric acid to remove rust on the surface. During the pickling process, the hydrochloric acid in the hydrochloric acid washing solution is continuously consumed, and the ferrous ions in it are also continuously increasing with the consumption of hydrochloric acid until the hydrochloric acid washing solution no longer has a cleaning effect on the steel. The washing waste liquid is the pickling waste liquid. The composition of pickling waste liquid is mainly water, ferrous chloride, hydrogen chloride and a small amount of impurities. Its content varies with the pickling process, operating temperature, steel species and specifications, and ge...

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): C01G49/10C02F1/52B01D53/56
Inventor 田莹莹尹应武罗伟
Owner BEIJING ZIGUANG YINGLI CHEM TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap