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Apparatus and method of synthesizing acidic material on SiO2 surface by eliminating gas phase method

An acidic substance and deacidification technology, applied in the direction of silicon oxide, etc., can solve the problems of product yield decline, expensive equipment, high energy consumption, etc., and achieve the effects of increasing yield and PH value, reducing energy consumption, and improving quality

Active Publication Date: 2007-03-07
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current deacidification is generally carried out in a fluidized bed, and a significant defect of this method is high energy consumption and low yield, such as the technology disclosed in the 03116947.3 patent
For fluidized bed deacidification, in order to achieve a fluidized deacidification temperature of 300°C to 500°C and to fluidize the material, it is necessary to provide high-temperature gas to fluidize the material. Generally, the mixed gas after combustion of hydrogen and air is used as the high-temperature flow. oxide gas, while SiO 2 The initial fluidization velocity is 2 ~ 5cm / s, and the material can be desorbed on SiO only when it is fluidized and boiled in the equipment. 2 HCl on the surface, and the fluidization gas volume must be greater than the gas volume of the above-mentioned fluidization velocity, so it is difficult to separate the gas-solid two phases in the deacidification tower, which greatly causes the SiO in the deacidification tail gas 2 Entrainment reduces the product yield. To increase the yield, it must be collected by a bag filter made of special materials, and this equipment is expensive
Unbearable for general domestic enterprises

Method used

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  • Apparatus and method of synthesizing acidic material on SiO2 surface by eliminating gas phase method
  • Apparatus and method of synthesizing acidic material on SiO2 surface by eliminating gas phase method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Adopt the device of Fig. 1, Fig. 2 and Fig. 3, wherein, structural parameters are as follows:

[0038] The internal diameter D=0.3 meter of deacidification furnace, length=3 meters, be provided with 6 lifting plates 9, evenly distributed, the width of lifting plate 9 is 0.05 meters;

[0039] Raw material: white carbon black crude product, the pH of 4% aqueous solution is 2.

[0040] Send the mixture of 5 kg / h of white carbon black crude product and 6 m / h of nitrogen and 8 m / h of water vapor into the deacidification furnace 2 through the feeding device, and start the motor at the same time to drive the deacidification furnace to rotate through the rotating shaft , use hydrogen combustion to heat, control the temperature in the deacidification furnace to 400°C, the product after deacidification is sent to the subsequent section for processing by the discharge collector;

[0041] The residence time of white carbon black coarse product in the deacidification furnace is 30 ...

Embodiment 2

[0045] Adopt the device of Fig. 1, Fig. 2 and Fig. 3, wherein, structural parameters are as follows:

[0046] The internal diameter D=0.6 meter of deacidification furnace, length=6 meters, be provided with 4 lifting plates 9, evenly distributed, the width of lifting plate 9 is 0.10 meters;

[0047] Raw material: white carbon black crude product, pH of 4% aqueous solution is 2.5.

[0048] Send the mixture of 10 kg / h of white carbon black crude product, 6 m / h of nitrogen and 8 m / h of water vapor into the deacidification furnace 2 through the feeding device, and start the motor at the same time to drive the deacidification furnace to rotate through the rotating shaft , using electric heating to control the temperature in the deacidification furnace to 450°C, the product after deacidification is sent to the subsequent section for processing through the discharge collector;

[0049] The residence time of white carbon black coarse product in the deacidification furnace is 30 minute...

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Abstract

The invention discloses an acid material removing device and method on the SiO2 surface, which is characterized by the following: the bar-shaped copy board (9) is set along normal direction on the inner wall of deacidifying furnace (2), whose one end connects inner wall of deacidifying furnace (2); the material baffle board is set in the inlet end, which is fixed on the inner wall of deacidifying furnace through connecting part; the flow channel is set between material baffle board and inner wall of deacidifying furnace.

Description

technical field [0001] The invention relates to a gas-phase method for synthesizing SiO 2 Deacidification production device and method, especially related to the removal of SiO 2 Apparatus and method for acidic substances on surfaces. Background technique [0002] SiO 2 There are two production methods of water phase method and gas phase method. The present invention is a gas phase method of combustion synthesis based on SiCl 4 and H 2 O is prepared by burning raw materials, such as the technology disclosed in the 98114270.2 document and the 03116946.5 patent, the surface of the crude product has HCl adsorbed, therefore, the pH value of the 4% aqueous solution of the crude product is about 2, and deacidification treatment must be carried out , otherwise, it will affect the performance of its use. [0003] The current deacidification is generally carried out in a fluidized bed. A significant defect of this method is high energy consumption and low yield, such as the tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/113
Inventor 岳群江雄旺胡伟敏马鸿春钱学林
Owner SHANGHAI CHLOR ALKALI CHEM
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