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

Preparation method of ferrous sulfate tetrahydrate

A technology of ferrous sulfate and crystal transformation, which is applied in the direction of ferric sulfate, can solve the problem of ferrous sulfate losing its reducing ability, and achieve the effect of improving utilization value, good economic benefits, and convenient transportation

Pending Publication Date: 2021-10-29
LOMON BILLIONS GRP CO LTD
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of granulation is that ferrous sulfate loses its reducing power if the granules become too hard

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
  • Preparation method of ferrous sulfate tetrahydrate
  • Preparation method of ferrous sulfate tetrahydrate
  • Preparation method of ferrous sulfate tetrahydrate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] According to one aspect of the present invention, the present invention relates to a kind of preparation method of ferrous sulfate tetrahydrate, comprises the following steps:

[0038] The artificial rutile mother liquor is subjected to concentration treatment and crystal transformation treatment, and then solid-liquid separation is carried out to obtain ferrous sulfate tetrahydrate and a liquid phase system containing ferrous sulfate;

[0039] The temperature of the concentration treatment is 60-80° C.; the mass percentage of iron in the mixed solution after the concentration treatment is 14%-18%;

[0040] The temperature of the crystal transformation treatment is 60-80°C.

[0041] In order to avoid the waste of resources caused by direct crystallization and neutralization, the high processing cost, and the situation of secondary pollution, the present invention is based on the green vitriol, yellow ferrous and the mixture of green vitriol and yellow ferrous However, ...

Embodiment 1

[0082] A preparation method for ferrous sulfate tetrahydrate, comprising the following steps:

[0083] At 25°C, add iron powder to the artificial rutile mother liquor, react until the sulfuric acid content in the artificial rutile mother liquor drops to 0.1%, settle and filter to obtain a saturated solution of ferrous sulfate with low acidity; Concentrate until the iron ion content in the solution is 14%, then carry out crystal transformation, keep the crystal transformation temperature at 60°C, stir at 150rpm, centrifuge after 3 hours of crystal transformation to obtain iron content of 24.65% ferrous sulfate tetrahydrate, other indicators and The yield of one-time crystal transformation is shown in Table 2 below; the liquid phase system after centrifugation is heated and hydrolyzed to obtain solid phase metatitanic acid. The heating temperature is 90°C, and then pressure filtration is performed. Return for concentrated processing.

Embodiment 2

[0085] A preparation method for ferrous sulfate tetrahydrate, comprising the following steps:

[0086] At 50°C, add reduced ilmenite to the artificial rutile mother liquor, react until the sulfuric acid content in the artificial rutile mother liquor drops to 0.08%, then settle and filter to obtain a low-acidity ferrous sulfate saturated solution; Concentrate the iron solution at 80°C until the content of iron ions in the solution is 18%, then conduct crystal transformation, keep the crystal transformation temperature at 70°C, stir at 200rpm, centrifuge after 4 hours to obtain iron content of 25.74% tetrahydrate Ferrous sulfate, other indicators and the yield of one-time crystal transformation are shown in Table 2 below; the liquid phase system after centrifugation is heated and hydrolyzed to obtain solid phase metatitanic acid. The liquid phase obtained after filtration is returned for concentration treatment.

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 the technical field of preparation of ferrous sulfate tetrahydrate, and concretely relates to a preparation method of ferrous sulfate tetrahydrate. The preparation method of ferrous sulfate tetrahydrate comprises the following steps: carrying out concentration treatment and crystal transformation treatment on artificial rutile mother liquor, and then carrying out solid-liquid separation to obtain ferrous sulfate tetrahydrate and a ferrous sulfate-containing liquid phase system. The temperature of the concentration treatment is 60-80 DEG C; the concentration treatment is performed until the mass percentage content of iron in the mixed solution is 14-18%; and the temperature of the crystal transformation treatment is 60-80 DEG C. According to the method, the treatment cost of the artificial rutile mother liquor is greatly reduced, the artificial rutile mother liquor is scientifically and effectively utilized, and meanwhile, ferrous sulfate tetrahydrate with high added value is produced and used for environmental protection, cement chromium removal and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of ferrous sulfate tetrahydrate, in particular to a preparation method of ferrous sulfate tetrahydrate. Background technique [0002] The production process of titanium dioxide by the chloride method is short, the production capacity is easy to expand, the degree of continuous automation is high, the product quality control is more stable than the sulfuric acid method, the "three wastes" are less, and there are fewer environmental problems. It has become the mainstream production technology of titanium dioxide. With the gradual expansion of the production capacity of the chlorination process, the demand for raw materials is also gradually increasing. At present, there are many methods for the preparation of artificial rutile, but the process is relatively complicated. At present, the main methods that can realize industrialization are reduction corrosion method and acid leaching method. The h...

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): C01G49/14
CPCC01G49/14
Inventor 豆君李珍珍文军娄晓杰崔灿灿刘琪琪许菲菲
Owner LOMON BILLIONS GRP CO LTD
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