Vaporizer, white carbon black production apparatus and white carbon black production method

Abstract

The invention provides a vaporizer, a white carbon black production apparatus and a white carbon black production method. The vaporizer comprises a tube array vertically arranged at the lower portion of the vaporizer, a material gas phase outlet arranged at the top of the vaporizer, a material liquid phase inlet arranged at the bottom of the vaporizer, and a liquidometer arranged in the vaporizer and used for controlling the liquid level in the vaporizer 30-60mm higher than the upper surface of the tube array. The vaporizer can be used as a methyltrichlorosilane vaporizer, the liquidometer is arranged in the vaporizer and controls the liquid level in the vaporizer 30-60mm higher than the surface of the tube array, and the upper portion of the vaporizer is provided with a certain vaporization buffering space, so methyltrichlorosilane can be stably vaporized, the vaporization pressure is stable, and the fluctuation of the methyltrichlorosilane gas phase flow is reduced, thereby the fluctuation of the specific surface area of obtained white carbon black is small, and the quality of the white carbon black is improved.

Description

technical field

[0001] The invention relates to the technical field of inorganic fine chemicals, in particular to a vaporizer, equipment and method for producing white carbon black. Background technique

[0002] White carbon black is the general term for white powdery X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel and aerogel, including powdered Synthesis of aluminum silicate and calcium silicate, etc. Silica is a porous substance whose composition can be SiO 2 ·nH 2 O represents, where nH 2 O exists in the form of surface hydroxyl, high temperature resistance, non-flammable, tasteless, odorless, and has good electrical insulation. As an environmentally friendly additive with excellent performance, silica is mainly used in the fields of rubber products (including high-temperature vulcanized silicone rubber), textiles, papermaking, pesticides, and food additives.

[0003] According to the pr...

Examples

Embodiment 1

[0118] The molar ratio is methyltrichlorosilane: air: hydrogen = 1:10:1 ratio, methyltrichlorosilane is vaporized through vaporizer 1, and the liquid level of the vaporizer is controlled by a regulating valve to keep it stable so that the liquid level is higher than that of the tube The upper surface is 30mm; the vaporized methyltrichlorosilane gas phase is mixed with the air from the air heater 2, and then mixed with the hydrogen from the hydrogen heater 3 in the first reactor 4 and the second reactor 5 and injected into the The high temperature hydrolysis reaction is carried out in the corresponding first synthesis furnace 6 and the second synthesis furnace 7 . The gas-solid mixture discharged from the first synthesis furnace 6 and the second synthesis furnace 7 is cooled through the first vertical pipe 8 and the second vertical pipe 9, the first horizontal pipe 10 and the second horizontal pipe 11, and the cooled material is respectively The agglomerated white carbon black ...

Embodiment 2

[0125] The technical solution of Example 1 was used to produce white carbon black. The difference was that in this example, the molar ratio of methyltrichlorosilane:air:hydrogen was 1:25:4.

[0126] The present invention detects the obtained white carbon black, and the results show that the acid value of the white carbon black obtained in this example is relatively high, kept between 4.4 and 4.6, and the specific surface area is stable, and the specific surface area is 50m 2 / g~60m 2 / g, the fluctuation is small, and the average particle size is 15 μm to 16 μm.

Embodiment 3

[0128] Adopt the technical scheme of embodiment 1 to produce white carbon black, the difference is that in the present embodiment, methyltrichlorosilane: air: the mol ratio of hydrogen is 1:20:3, and the water yield of synthesis furnace section is 11m 3 / h, the water volume of the standpipe section is 9m 3 / h, the water volume of the horizontal pipe section is 7m 3 / h, the water volume of the first and second sections of the concentrator is 4m respectively 3 / h and 2m 3 / h.

[0129] The present invention detects the obtained white carbon black, and the results show that the acid value of the white carbon black obtained in this example is relatively high, kept between 4.4 and 4.6, and the specific surface area is stable, with a specific surface area of ​​175m 2 / g~185m 2 / g, the fluctuation is small, and the average particle size is 7 μm to 8 μm.

technical field

[0001] The invention relates to the technical field of inorganic fine chemicals, in particular to a vaporizer, equipment and method for producing white carbon black. Background technique

[0002] White carbon black is the general term for white powdery X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel and aerogel, including powdered Synthesis of aluminum silicate and calcium silicate, etc. Silica is a porous substance whose composition can be SiO 2 ·nH 2 O represents, where nH 2 O exists in the form of surface hydroxyl, high temperature resistance, non-flammable, tasteless, odorless, and has good electrical insulation. As an environmentally friendly additive with excellent performance, silica is mainly used in the fields of rubber products (including high-temperature vulcanized silicone rubber), textiles, papermaking, pesticides, and food additives.

[0003] According to the pr...

Examples

Embodiment 1

[0118] The molar ratio is methyltrichlorosilane: air: hydrogen = 1:10:1 ratio, methyltrichlorosilane is vaporized through vaporizer 1, and the liquid level of the vaporizer is controlled by a regulating valve to keep it stable so that the liquid level is higher than that of the tube The upper surface is 30mm; the vaporized methyltrichlorosilane gas phase is mixed with the air from the air heater 2, and then mixed with the hydrogen from the hydrogen heater 3 in the first reactor 4 and the second reactor 5 and injected into the The high temperature hydrolysis reaction is carried out in the corresponding first synthesis furnace 6 and the second synthesis furnace 7 . The gas-solid mixture discharged from the first synthesis furnace 6 and the second synthesis furnace 7 is cooled through the first vertical pipe 8 and the second vertical pipe 9, the first horizontal pipe 10 and the second horizontal pipe 11, and the cooled material is respectively The agglomerated white carbon black ...

Embodiment 2

[0125] The technical solution of Example 1 was used to produce white carbon black. The difference was that in this example, the molar ratio of methyltrichlorosilane:air:hydrogen was 1:25:4.

[0126] The present invention detects the obtained white carbon black, and the results show that the acid value of the white carbon black obtained in this example is relatively high, kept between 4.4 and 4.6, and the specific surface area is stable, and the specific surface area is 50m 2 / g~60m 2 / g, the fluctuation is small, and the average particle size is 15 μm to 16 μm.

Embodiment 3

[0128] Adopt the technical scheme of embodiment 1 to produce white carbon black, the difference is that in the present embodiment, methyltrichlorosilane: air: the mol ratio of hydrogen is 1:20:3, and the water yield of synthesis furnace section is 11m 3 / h, the water volume of the standpipe section is 9m 3 / h, the water volume of the horizontal pipe section is 7m 3 / h, the water volume of the first and second sections of the concentrator is 4m respectively 3 / h and 2m 3 / h.

[0129] The present invention detects the obtained white carbon black, and the results show that the acid value of the white carbon black obtained in this example is relatively high, kept between 4.4 and 4.6, and the specific surface area is stable, with a specific surface area of ​​175m 2 / g~185m 2 / g, the fluctuation is small, and the average particle size is 7 μm to 8 μm.

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