Unlock instant, AI-driven research and patent intelligence for your innovation.

Sodium percarbonate continuous preparation method

A technology of sodium percarbonate and solid sodium carbonate, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc., can solve the problem of unstable product quality , low degree of automation, lack of thermal stability and other problems, to achieve the effect of qualified active oxygen content, increased degree of automated production, and reduced labor intensity

Inactive Publication Date: 2018-11-02
SHANGYU JIEHUA CHEM
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods are to add sodium carbonate first in the reactor, then spray the hydrogen peroxide solution, discharge the material in a single kettle, and dry to obtain the product, the production efficiency is low, and the product quality is unstable, the thermal stability is lacking, and there is a low degree of automation at the same time. , high labor intensity and other disadvantages

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
  • Sodium percarbonate continuous preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Embodiment 1, step 1, first weigh 200kg35% hydrogen peroxide solution, and add chelating agent 1.2kg sodium hexametaphosphate and inorganic stabilizer 0.7kg sodium sulfate, stir and mix to obtain hydrogen peroxide mixed solution (standby, recyclable preparation); Add 36kg of powdered sodium percarbonate to a 50L reactor with a double-armed helix; step 2, start the double-armed helix stirring, and simultaneously add 98% pure light sodium carbonate, hydrogen peroxide mixed solution and silicic acid with a modulus of 1.0 Sodium, the feed rate of control sodium carbonate is 17.3kg / h, the spray rate of hydrogen peroxide mixed solution is 26.2kg / h, the spray rate of sodium silicate is 0.13kg / h, adjusts the bottom compressed air flow control reaction temperature to be At about 35°C, sodium carbonate and hydrogen peroxide fully react to obtain a wet product of sodium percarbonate, which is wrapped with sodium silicate; step 3, the wrapped sodium percarbonate overflows from the re...

Embodiment 2

[0032] Embodiment 2, step 1, weigh 100kg70% hydrogen peroxide solution, and add chelating agent 2.8kg diethylene triamine pentamethylene phosphonic acid and inorganic stabilizer 2.1kg magnesium sulfate and mix evenly to obtain hydrogen peroxide mixed solution (standby, recyclable preparation); add 36kg granular sodium percarbonate in 50L reactor with double-armed spiral; step 2, open double-armed spiral stirring, and add 95% purity heavy sodium carbonate and hydrogen peroxide mixed solution simultaneously, control the progress of sodium carbonate The material speed is 11.5kg / h, the spray speed of hydrogen peroxide mixed solution is 7.51kg / h, the spray speed of PEG400 is 0.69kg / h, adjust the flow rate of compressed air at the bottom to control the reaction temperature to about 54℃, and the sodium carbonate and hydrogen peroxide are fully React to obtain a wet product of sodium percarbonate, which is generated by wrapping with PEG400; step 3, the wrapped sodium percarbonate overf...

Embodiment 3

[0033] Embodiment 3, step 1, take by weighing 1000kg50% hydrogen peroxide solution, and add chelating agent 2kg sodium tripolyphosphate, 3kg1-hydroxyethane-1,1-sodium diphosphonate, 3kg diethylenetriamine pentamethylene Sodium phosphonate and inorganic stabilizer 2kg sodium metasilicate pentahydrate, 4kg magnesium chloride stir and mix uniformly, obtain hydrogen peroxide mixed solution (standby, recyclable preparation); Add 700kg powdery percarbonic acid in 1000L reactor with double-armed helix Sodium; step 2, open double-arm spiral stirring, and add 99% purity light sodium carbonate and hydrogen peroxide mixed solution simultaneously, the feed rate of control sodium carbonate is 169kg / h, and the spray speed of hydrogen peroxide mixed solution is 167kg / h, product, the wet product generated by wrapping sodium carboxymethyl cellulose; step 3, the wrapped sodium percarbonate overflows from the reactor overflow to the fluidized boiling machine for drying, and the drying temperature...

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
purityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a sodium percarbonate continuous preparation method which comprises the following steps of adding a chelating agent and an organic stabilizer into a hydrogen peroxide solution,perform uniform stirring and mixing to obtain a hydrogen peroxide mixed solution, and adding sodium percarbonate into a reactor; then continuously adding solid sodium carbonate, the hydrogen peroxidemixed solution and a coating material into the reactor at the same time, controlling a feeding speed and a reaction temperature to enable the sodium carbonate and hydrogen peroxide to be fully reacted, and coating a generated wet sodium percarbonate product with the coating material; and enabling the coated wet sodium percarbonate product to overflow to a fluidized ebulating bed for drying from an overflowing hole of the reactor, and controlling a drying temperature to obtain a sodium percarbonate product. In the sodium percarbonate continuous preparation method provided by the invention, thetwo of the sodium carbonate and the hydrogen peroxide solution to be stirred for reaction, and the wrapping material wraps a reaction wet product without separating reactive synthesis from a coating,so that reaction and coating integration continuous production of the sodium percarbonate is realized, the production efficiency is high, the thermal stability of the sodium percarbonate product is improved, the content of active oxygen of the product is qualified, and the quality of the product is stable.

Description

technical field [0001] The present invention relates to peroxide preparation technical field, be specifically related to a kind of continuous preparation method of sodium percarbonate. Background technique [0002] Sodium percarbonate, commonly known as solid hydrogen peroxide, is a compound formed by sodium carbonate and hydrogen peroxide by hydrogen bonding. It is a white crystalline powder or granular solid with a molecular formula of 2Na 2 CO 3 ·3H 2 o 2 . Since Japan successfully developed and put into production at the end of the 1970s, countries such as Europe and the United States have also competed to develop and research this product. my country just began to research and produce this product in the early 1980s, and has formed a certain production scale so far. Sodium percarbonate is a new type of multi-purpose washing, bleaching and sterilizing agent. It has the characteristics of odorless, non-toxic, non-polluting, and good water solubility. It has been widel...

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): C01B15/10
CPCC01B15/103
Inventor 严朝阳罗力军陶卓奇
Owner SHANGYU JIEHUA CHEM