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

Method for manufacturing sodium metasilicate nonahydrate with fly ashes

A technology of sodium metasilicate nonahydrate and fly ash, which is applied in the field of resource utilization of fly ash, can solve the problems of large non-renewable mineral resources, destruction of ecological balance, difficult industrialization promotion, etc., and achieve the protection of ecological balance , low cost, scientific and reasonable method

Active Publication Date: 2011-09-21
INNER MONGOLIA DATANG INT RENEWABLE RESOURCES DEV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the selection of raw materials is not only limited but also consumes a large amount of non-renewable mineral resources, seriously destroying the ecological balance
[0007] 2. A small number of research materials disclose that fly ash and sodium hydroxide are used as raw materials to produce sodium metasilicate nonahydrate or sodium metasilicate pentahydrate, but the raw material for preparing sodium silicate - desiliconization solution or modulus is too low ( Generally not more than 0.5), or desiliconization solution SiO 2 The concentration is too low, the production process of qualified sodium silicate products prepared from this desiliconization solution is complex, the energy consumption and alkali consumption are high, and it is difficult to promote industrialization

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 manufacturing sodium metasilicate nonahydrate with fly ashes
  • Method for manufacturing sodium metasilicate nonahydrate with fly ashes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] figure 1 It is a production process flow chart of the present invention. Such as figure 1 Visible, the method disclosed in the present embodiment utilizes fly ash to produce nonahydrate sodium metasilicate, comprises the steps:

[0031] 1) Dissolve 15g of NaOH in 85ml of water and raise the temperature to 120°C to prepare a sodium hydroxide solution, take 30g of fly ash and slowly add it to the sodium hydroxide solution, stirring while adding, when the fly ash and lye are mixed evenly, Insulate and react for 1.5 hours, then filter and separate the slurry, the obtained solid desiliconization slag is used to produce alumina, and the obtained filtrate is primary desiliconization liquid.

[0032] 2) Raise the temperature of the primary desiliconization solution to 125°C, then take 35g of fly ash and slowly put it into the primary desiliconization solution, stir while adding, after mixing evenly, keep it warm for 1.5h, then filter and separate the slurry, the obtained soli...

Embodiment 2

[0037] The disclosed method of utilizing fly ash to produce sodium metasilicate nonahydrate comprises the steps:

[0038] 1) Dissolve 12g of NaOH in 88ml of water and heat up to 110°C, then take 20g of fly ash and slowly add it to the sodium hydroxide solution, stirring while adding, when the fly ash and lye are mixed evenly, keep the temperature for 2 hours, and then The slurry is separated by filtration, and the obtained solid desiliconization slag is used to produce alumina, and the obtained filtrate is primary desiliconization liquid.

[0039] 2) Raise the temperature of the primary desiliconization solution to 115°C, then take 30g of fly ash and slowly put it into the primary desilication solution, stir while adding, after mixing evenly, keep it warm for 2 hours, then filter and separate the slurry to obtain solid desiliconization The slag is used to produce alumina, and the obtained filtrate is the secondary desiliconization liquid.

[0040] 3) Keep the secondary desili...

Embodiment 3

[0043] The disclosed method of utilizing fly ash to produce sodium metasilicate nonahydrate comprises the steps:

[0044] 1) Dissolve 18g of NaOH in 82ml of water and heat up to 130°C, then slowly add 40g of fly ash into the alkali solution, stirring while adding, when the fly ash and alkali are mixed evenly, keep the temperature for 1 hour, and then put The slurry is separated by filtration, and the obtained solid desiliconization slag is used to produce alumina, and the obtained filtrate is primary desiliconization liquid.

[0045] 2) Raise the temperature of the primary desiliconization solution to 135°C, then take 40g of fly ash and slowly put it into the primary desilication solution, stir while adding, after mixing evenly, keep it warm for 1 hour, then filter and separate the slurry to obtain solid desiliconization The slag is used to produce alumina, and the obtained filtrate is the secondary desiliconization liquid.

[0046] 3) Keep the secondary desiliconization solu...

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for manufacturing sodium metasilicate nonahydrate with fly ashes, comprising the steps of: adding fly ashes into a sodium hydroxide solution for desilication, then performing a solid-liquid separation, thus obtaining a first desiliconized liquid; adding fly ashes into the first desiliconized liquid for a second desilication, then performing a solid-liquid separation, thus obtaining a second desiliconized liquid; evaporating and thickening the second desiliconized liquid, and when the content of SiO2 accounts for 120-150g / L, stopping evaporating and thickening and starting cooling, then adding sodium metasilicate nonahydrate crystals into the second desiliconized liquid as a seed crystal, then precipitating crystals; performing a solid-liquid separation to the second desiliconized liquid from which the crystals are precipitated, so that a solid product can be obtained, then drying the solid product so as to obtain the product of sodium metasilicate nonahydrate. Adoption of the method provided in the invention overcomes lots of disadvantages of the prior art, and enjoys the advantages of easily available raw material, low cost, good product quality, improved production efficiency as well as easy industrialization promotion.

Description

technical field [0001] The invention relates to resource utilization of fly ash, in particular to a method for producing sodium metasilicate nonahydrate by using fly ash. Background technique [0002] Sodium metasilicate nonahydrate is a white crystalline powder with a relative density of 0.7-0.9 and a melting point of 40-48°C. Soluble in water and dilute alkali solution, insoluble in alcohol and acid, the aqueous solution is alkaline, easy to absorb moisture and deliquescence when exposed to air. Sodium metasilicate nonahydrate is mainly used as a high-efficiency additive in washing powder, metal cleaning agent, and tableware washing. It is also used in cotton yarn cooking, old paper ink removal, printing decontamination, vegetable oil recovery, and can be used as a peroxide. Stabilizer for bleach. In addition, sodium metasilicate nonahydrate has a large number of applications in industrial fields such as detergent, ceramics, electroplating, textile, printing and dyeing, ...

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): C01B33/32B09B3/00
Inventor 张战军陈刚徐鹏李畅张晓云张先奇武利成孙汝祥
Owner INNER MONGOLIA DATANG INT RENEWABLE RESOURCES DEV
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