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Production process for preparing sodium silicate from sodium sulfate

A production process, sodium sulfate technology, applied in the directions of silicate, alkali metal silicate, silicon compound, etc., can solve the problems of slow crystallization speed of sodium silicate, slow down the production efficiency of sodium silicate, etc. The effect of improving crystallization yield and high purity

Inactive Publication Date: 2020-12-08
江苏康祥实业集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sodium sulfate method: raw materials include sodium sulfate (anhydrous Glauber’s salt), carbon powder, and quartz sand. The production process is similar to the sodium carbonate method. my country’s sodium sulfate resources are relatively abundant, so most companies will choose the sodium sulfate method to produce sodium silicate. However, The crystallization speed of sodium silicate prepared by the existing sodium sulfate method is slow, which slows down the production efficiency of sodium silicate. Therefore, a production process for preparing sodium silicate by using sodium sulfate is proposed

Method used

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  • Production process for preparing sodium silicate from sodium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Sodium sulfate, limestone, and anthracite are mixed and crushed, passed through a 20-mesh sieve, and calcined in a high-temperature furnace at a calcining temperature of 1000°C, and the mixed powder is calcined to a molten state;

[0019] Step 2: Pour the molten material in step 1 into water to prepare a sodium carbonate solution, add milk of lime to the sodium carbonate solution, react at a temperature of 75°C, filter out the calcium carbonate precipitate, and prepare a sodium hydroxide solution ;

[0020] Step 3: Evaporate and crystallize the sodium hydroxide solution prepared in step 2 to obtain solid sodium hydroxide;

[0021] Step 4: prepare the raw material sodium hydroxide solution, add the solid sodium hydroxide prepared in step 3 into deionized water, wherein 60 g of solid sodium hydroxide is added to every 100 ml of water;

[0022] Step 5: the raw material sodium hydroxide solution prepared in step 4 is mixed with the water glass solution, the volume ...

Embodiment 2

[0025] Step 1: Sodium sulfate, limestone, and anthracite are mixed and crushed, passed through a 25-mesh sieve, and calcined in a high-temperature furnace at a calcination temperature of 1020°C, and the mixed powder is calcined to a molten state;

[0026] Step 2: Pour the molten material in step 1 into water to prepare a sodium carbonate solution, add milk of lime to the sodium carbonate solution, react at a temperature of 77°C, filter out the calcium carbonate precipitate, and prepare a sodium hydroxide solution ;

[0027] Step 3: Evaporate and crystallize the sodium hydroxide solution prepared in step 2 to obtain solid sodium hydroxide;

[0028] Step 4: prepare the raw material sodium hydroxide solution, add the solid sodium hydroxide prepared in step 3 into deionized water, wherein 60 g of solid sodium hydroxide is added to every 100 ml of water;

[0029] Step 5: the raw material sodium hydroxide solution prepared in step 4 is mixed with the water glass solution, the volum...

Embodiment 3

[0032] Step 1: Sodium sulfate, limestone, and anthracite are mixed and crushed, passed through a 30-mesh sieve, and calcined in a high-temperature furnace at a calcining temperature of 1050°C, and the mixed powder is calcined to a molten state;

[0033] Step 2: Pour the molten material in step 1 into water to prepare a sodium carbonate solution, add milk of lime to the sodium carbonate solution, react at a temperature of 80°C, filter out the calcium carbonate precipitate, and prepare a sodium hydroxide solution ;

[0034] Step 3: Evaporate and crystallize the sodium hydroxide solution prepared in step 2 to obtain solid sodium hydroxide;

[0035] Step 4: prepare the raw material sodium hydroxide solution, add the solid sodium hydroxide prepared in step 3 into deionized water, wherein 60 g of solid sodium hydroxide is added to every 100 ml of water;

[0036] Step 5: the raw material sodium hydroxide solution prepared in step 4 is mixed with the water glass solution, the volume ...

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Abstract

The invention discloses the technical field of sodium silicate production processes, and particularly relates to a production process for preparing sodium silicate from sodium sulfate. The productionprocess comprises the following steps: mixing sodium sulfate, limestone and anthracite, crushing, sieving, calcining in a high-temperature furnace to convert sodium sulfate into sodium sulfide under the reduction action of pulverized coal, reacting the sodium sulfide with calcium carbonate to generate sodium carbonate and calcium sulfide, preparing a sodium carbonate solution, then reacting the sodium carbonate solution with lime milk to generate a sodium hydroxide solution and calcium carbonate precipitate in order to complete preparation of sodium hydroxide in the earlier stage. The purity of the sodium hydroxide product finally obtained by adopting a sodium hydroxide preparation method is high, accurate proportioning is provided for subsequent preparation of the sodium hydroxide solution, favorable conditions beneficial to crystallization are provided for reaction through reaction of the sodium hydroxide solution with fixed mass fraction and water glass, the crystallization rate ofsodium silicate is effectively increased, and the crystallization yield of sodium silicate is increased.

Description

technical field [0001] The invention relates to the technical field of sodium silicate production technology, and the specific field is a production technology for preparing sodium silicate by using sodium sulfate. Background technique [0002] Sodium silicate, commonly known as sodium silicate, and its aqueous solution commonly known as water glass, is a mineral binder. Sodium silicate is a soluble inorganic silicate with a wide range of uses. Sodium silicate is the most valuable filler in the soap industry. Adding sodium silicate to laundry soap can buffer the alkalinity of laundry soap, Reduce the loss of laundry soap in water, enhance the washing ability and prevent soap rancidity; sodium silicate plays a role in washing, anti-corrosion, and foam stabilization in synthetic detergents; it can be used as a filler in papermaking; it is used to make silicone gel , Silica gel; used as a binder in the foundry industry, bonding sand and clay, and making various molds and cores...

Claims

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Application Information

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IPC IPC(8): C01B33/32
CPCC01B33/32C01B33/325
Inventor 朱雪松季成平刘仕通孙明于海洋
Owner 江苏康祥实业集团有限公司
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