Preparation method of silicon dioxide with high oil absorption value and high water absorption capacity for washing powder

A silicon dioxide and water absorption technology, applied in the direction of silicon dioxide, silicon oxide, chemical instruments and methods, etc., can solve the problems of insufficient water absorption and oil absorption value, and is conducive to popularization and application. The method is simple and the conditions are controllable Effect

Active Publication Date: 2016-08-17
GUANGZHOU FEIXUE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oil absorption value of silica for washing powder on the market is about 300g/100g, and the water absorption is about 46ml/20gH 2 O, while the water absorption and oil absorption value of silica prepared by traditional methods are not high enough, as Chinese patent application CN105236415 A discloses a preparation method of core-shell type precipitated silica, the method mainly uses sodium silicate and sulfuric acid as The raw material adopts two-step hydrothermal precipitation reaction, and strictly controls the raw material con

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  • Preparation method of silicon dioxide with high oil absorption value and high water absorption capacity for washing powder

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Effect test

Embodiment 1

[0022] Embodiment 1, the preparation method of silicon dioxide for washing powder with high oil absorption value and high water absorption capacity of the present invention

[0023] S1, the SiO 2 :Na 2 The solid sodium silicate with O=3.3~3.45 is pressurized and heated to be liquefied, and then added with water to prepare a sodium silicate solution with a concentration of 2.0M, and prepare a saturated sodium bicarbonate solution for subsequent use;

[0024] S2, add 7m in reaction tank 3 water, warming up to 40°C, then adding 3.0m of saturated sodium bicarbonate solution dropwise at the same time 3 and 2.0M sodium silicate solution 3.5m 3 , controlled to finish dripping within 25 minutes, forming sol-like silica;

[0025] S3, heat up to 75°C, continue to add 5.2m of 2.0M sodium silicate solution to the reaction tank 3 , and then dropwise added saturated sodium bicarbonate solution 4.5m 3 , after the dropwise addition, titrate with 4M sulfuric acid until the end point pH i...

Embodiment 2

[0028] Embodiment 2, the preparation method of silicon dioxide for washing powder with high oil absorption value and high water absorption capacity of the present invention

[0029] S1, the SiO 2 :Na 2 The solid sodium silicate with O=3.3~3.45 is pressurized and heated to be liquefied, and then added with water to prepare a sodium silicate solution with a concentration of 0.8M, and prepare a saturated sodium bicarbonate solution for subsequent use;

[0030] S2, add 5m in reaction tank 3 water, warm up to 45°C, then add 2.2m of saturated sodium bicarbonate solution dropwise at the same time 3 and 0.8M sodium silicate solution 2.8m 3 , controlled to finish dripping within 35 minutes, forming sol-like silica;

[0031] S3, heat up to 65°C, continue to add 4.4m of 0.8M sodium silicate solution to the reaction tank 3 , and then dropwise add saturated sodium bicarbonate solution 3.5m 3 , after the dropwise addition, titrate with 4M sulfuric acid until the end point pH is 3, and...

Embodiment 3

[0034] Embodiment 3, the preparation method of silicon dioxide for washing powder with high oil absorption value and high water absorption capacity of the present invention

[0035] S1, the SiO 2 :Na 2 The solid sodium silicate with O=3.3~3.45 is pressurized and heated to be liquefied, and then added with water to prepare a sodium silicate solution with a concentration of 1.0M, and prepare a saturated sodium bicarbonate solution for subsequent use;

[0036] S2, add 6m in reaction tank 3 water, warming up to 40°C, then adding 2.7m saturated sodium bicarbonate solution dropwise at the same time 3 and 1.0M sodium silicate solution 3.2m 3 , controlled to finish dripping within 30 minutes, forming sol-like silica;

[0037] S3, heat up to 70°C, continue to add 4.8m of 1.0M sodium silicate solution to the reaction tank 3 , then dropwise add saturated sodium bicarbonate solution 4.0m 3 After the dropwise addition, titrate with 4M sulfuric acid until the end point pH is 6, and ag...

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Abstract

The invention belongs to the technical field of silicon dioxide, and in particular relates to a preparation method of silicon dioxide with high oil absorption value and high water absorption capacity for washing powder. The method comprises: S1, preparing S into a sodium silicate solution and a sodium hydrogen carbonate solution; S2, adding water into a reaction tank, performing heating, and simultaneously, dropwise adding the sodium silicate solution and the sodium hydrogen carbonate solution; S3, performing heating, continuously adding the sodium silicate solution, then dropwise adding the sodium hydrogen carbonate solution, performing titration of sulfuric acid until the end point, and performing aging to obtain a head product; S4, performing pressure filtration on the head product, then putting the head product into an agitator tank, adding a mixed solution of hydrogen peroxide and sulfuric acid, and performing agitation to obtain silicon dioxide; and S5, performing pressure filtration washing on the obtained silicon dioxide, and performing crushing to obtain a product. The silicon dioxide prepared by the method has high oil absorption value and high water absorption capacity, and can be used as a detergent assistant to enable the washing powder to have better solubility, dispersity, adsorbability and decontamination ability.

Description

technical field [0001] The invention belongs to the technical field of silicon dioxide, and in particular relates to a method for preparing silicon dioxide for washing powder with high oil absorption value and high water absorption. Background technique [0002] Washing powder is difficult to dissolve in water when the temperature is low, which greatly reduces its decontamination ability. Many manufacturers will increase the decontamination ability of washing powder by adding enzymes and surfactants, but enzymes cannot be fully utilized at low temperatures. It will be inactivated under high temperature conditions, and the use of enzymes and surfactants will also increase the cost of laundry detergent. [0003] Precipitated silica is an amorphous substance with high water absorption and oil absorption value, rich microscopic network structure, good diffusibility, thickening and adsorption. Polyhydroxy silica has a large water absorption capacity, a large number of silicon-ox...

Claims

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Application Information

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IPC IPC(8): C01B33/12C11D3/12
CPCC01B33/12C01P2006/19C01P2006/90C11D3/124
Inventor 任振雪周美琪张梦梅林英光赵国法
Owner GUANGZHOU FEIXUE MATERIAL TECH
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