CN114275786A - White carbon black preparation method and system - Google Patents
White carbon black preparation method and system Download PDFInfo
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- CN114275786A CN114275786A CN202111550998.9A CN202111550998A CN114275786A CN 114275786 A CN114275786 A CN 114275786A CN 202111550998 A CN202111550998 A CN 202111550998A CN 114275786 A CN114275786 A CN 114275786A
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- carbon black
- white carbon
- water
- tetraalkoxysilane
- gas
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000006229 carbon black Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 26
- 230000007062 hydrolysis Effects 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000006200 vaporizer Substances 0.000 claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 claims abstract description 15
- 239000012071 phase Substances 0.000 claims abstract description 5
- 239000007790 solid phase Substances 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims description 15
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 239000012159 carrier gas Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 230000008016 vaporization Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000012265 solid product Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910021485 fumed silica Inorganic materials 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000005049 silicon tetrachloride Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- -1 silicon halide compound Chemical class 0.000 description 2
- 239000005046 Chlorosilane Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003937 drug carrier Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
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Abstract
The invention relates to a preparation method and a preparation system of white carbon black, wherein tetraalkoxysilane is used as a raw material in the method and reacts with steam of water to generate the white carbon black, and the reaction temperature is not more than 300 ℃. The white carbon black preparation system comprises a tetraalkoxysilane vaporizer, a water vaporizer, a hydrolysis reactor, a gas-solid separator, a packaging machine and an alcohol recoverer; the outlet of the tetraalkoxysilane vaporizer and the outlet of the water vaporizer are respectively communicated with the nozzle and the air suction port of the hydrolysis reactor, the outlet of the hydrolysis reactor is communicated with the inlet of the gas-solid separator, the solid phase outlet of the gas-solid separator is communicated with the inlet of the packaging machine, and the gas phase outlet of the gas-solid separator is communicated with the inlet of the alcohol recoverer. By adopting the white carbon black preparation method and the white carbon black preparation system, silicon chloride raw materials can be avoided, the reaction condition is mild, the requirement on equipment materials is low, the equipment investment can be reduced, and meanwhile, the reaction efficiency is high, the product purity is high, so the production cost is low, and the product quality is high.
Description
Technical Field
The invention relates to the technical field of chemical production, in particular to a white carbon black preparation method and a white carbon black preparation system.
Background
The white carbon black can be classified into precipitated hydrated white carbon black and gas-phase white carbon black according to different production technologies. The fumed silica is also called fumed silica, has a series of excellent performances such as high purity, low density, small particle size, large specific surface area, strong water absorption capacity and the like, is widely applied to traditional industries such as organic silicon rubber, coating ink, adhesives and the like, and also has irreplaceable effects in emerging fields such as catalyst carriers, drug carriers and the like.
At present, the domestic industrialized production of the fumed silica mainly adopts a high-temperature combustion method, and the fumed silica is generated by the hydrolysis reaction of a silicon halide compound or an organic silicon halide compound with water vapor generated by the combustion of hydrogen and oxygen at high temperature, the primary particle size is 10-50nm, and the BET surface area is 100-400m2Between/g. However, the adopted raw material of the existing production process is chlorosilane, so that a series of defects of low safety, high reaction energy consumption, pollution of byproducts such as hydrogen chloride and the like exist. Moreover, the product is still acidic although being strictly dehydrochlorinated, and the pH value can only be controlled between 4 and 5, which is not beneficial to the downstream application of the product.
Patent CN102001670A discloses a method for producing fumed silica by using silicon tetrachloride as an inorganic silicon source, and patent CN203461824U discloses a method for producing fumed silica by using trichlorosilane as a main byproduct in the production process of organosilicon monomer trimethylchlorosilane as a raw material, wherein the reaction temperature is as high as 1000-1200 ℃, the energy consumption is high, and the problems of chlorine impurity pollution and corrosion are prominent. In order to reduce the reaction energy consumption, patent CN103224240A discloses a method for synthesizing fumed silica by hydrolyzing silicon tetrachloride at a low temperature, wherein water vapor is used to replace water generated by combustion of hydrogen and oxygen to react with silicon tetrachloride, so as to reduce the reaction temperature to 300 ℃, but the pollution problem of chlorine impurities still exists. In addition, CN102351150A also discloses a method for preparing fumed silica by reacting silicon tetrafluoride with water vapor at 200-800 ℃, which is a prominent problem of corrosion of hydrogen fluoride by-products to equipment. Therefore, the prior art has low conversion rate and high cost, and particularly, the problems of impurity pollution of halogen compounds, equipment corrosion and the like are not effectively overcome.
Disclosure of Invention
The invention aims to overcome the problems of low conversion rate, high cost, especially hydrogen chloride byproduct pollution and the like in the prior art, and provides a preparation system and a preparation system of chloridized white carbon black.
The purpose of the invention is realized by the following technical scheme:
a preparation method of white carbon black comprises the following steps: the method takes tetraalkoxysilane as a raw material, and reacts with steam of water to generate white carbon black, and the reaction temperature is not more than 300 ℃.
Preferably, the raw material tetraalkoxysilane is any one or a mixture of tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane.
Preferably, the water is deionized water, and the content of chloride ions in the water is less than 1.0 ppm.
Preferably, the feeding state of the tetraalkoxysilane raw material is gaseous and comprises an inert carrier gas, and the volume fraction of the inert carrier gas is 0-95% and is not 0.
Preferably, the feeding temperature of the tetraalkoxysilane raw material is 100-300 ℃, and the feeding temperature of the steam of the water is 120-300 ℃.
Preferably, the feed molar ratio of the tetraalkoxysilane raw material to steam of water is 1:2 to 1: 20.
The invention also provides a white carbon black preparation system, which comprises:
a tetraalkoxysilane vaporizer for vaporizing the introduced tetraalkoxysilane raw material;
the water vaporizer is used for vaporizing the introduced water;
the hydrolysis reactor is a Venturi type injection reactor and is provided with two feeding holes, one is connected with a nozzle, the other is an air suction port, and an outlet of the tetraalkoxysilane vaporizer and an outlet of the water vaporizer are respectively communicated with the nozzle and the air suction port of the hydrolysis reactor;
the gas-solid separator is used for separating gas-solid products, and an outlet of the hydrolysis reactor is communicated with an inlet of the gas-solid separator;
the packaging machine is used for collecting the white carbon black product, and a solid phase outlet of the gas-solid separator is communicated with an inlet of the packaging machine;
and the alcohol recoverer is used for collecting the product alcohol substances, and a gas phase outlet of the gas-solid separator is communicated with an inlet of the alcohol recoverer.
Preferably, the gas-solid separator is a bag filter.
Preferably, the alcohol recoverer is a rectifying tower, and can be a packed tower or a plate tower.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method adopts the chlorine-free silicon source tetraalkoxysilane to replace silicon chloride and the like as raw materials, does not generate byproducts such as hydrogen chloride and the like in the whole reaction process, and has high conversion rate, green and environment-friendly reaction and no pollution.
(2) The deionized water is used for replacing hydrogen and oxygen, so that the reaction temperature is reduced, and the reaction energy consumption is reduced.
(3) The gas phase reaction has simple operation, mild reaction condition, good quality of the obtained product, small grain diameter, high purity and large specific surface area.
Drawings
FIG. 1 is a schematic structural diagram of a white carbon black preparation system according to the present invention;
reference numerals: a 100-tetraalkoxysilane vaporizer; 200-a water vaporizer; 300-a hydrolysis reactor; 400-gas-solid separator; 500-packaging machine; 600-alcohol recoverer;
1-tetraalkoxysilane; 2-water; 3-alcohols; 4-white carbon black.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The ranges and any values disclosed herein are not limited to the precise range or value, which should be understood to encompass proximity to such ranges or values. The various ranges and values can be combined with one another to yield one or more new ranges and values, which should be considered as specifically disclosed herein.
The white carbon black method comprises the following steps: the method takes tetraalkoxysilane as a raw material, and reacts with steam of water to generate white carbon black, and the reaction temperature is not more than 300 ℃.
In the present invention, the tetraalkoxysilane as the raw material may be any one or a mixture of tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane.
In the invention, the raw material water is deionized water, and the content of chloride ions in the water is less than 1.0 ppm.
In the invention, the feeding state of the tetraalkoxysilane raw material is gaseous and contains inert carrier gas, and the volume fraction of the inert carrier gas is 0-95% and is not 0.
In the invention, the feeding temperature of the tetraalkoxysilane raw material is 100-300 ℃, and the feeding temperature of the steam of water is 120-300 ℃.
In the invention, the feeding molar ratio of the tetraalkoxysilane raw material to the steam of water is 1: 2-1: 20.
Referring to fig. 1, the present invention further provides a white carbon black preparation system, which includes a tetraalkoxysilane vaporizer 100, a water vaporizer 200, a hydrolysis reactor 300, a gas-solid separator 400, a packaging machine 500, and an alcohol recoverer 600; the hydrolysis reactor 300 is a venturi-type spray reactor comprising two feed inlets, one of which is connected to a nozzle and the other is an air suction port; the outlet of the tetraalkoxysilane vaporizer 100 and the outlet of the water vaporizer 200 are respectively communicated with the nozzle and the suction port of the hydrolysis reactor 300, the outlet of the hydrolysis reactor 300 is communicated with the inlet of the gas-solid separator 400, the solid phase outlet of the gas-solid separator 400 is communicated with the inlet of the packaging machine 500, and the gas phase outlet of the gas-solid separator 500 is communicated with the inlet of the alcohol recoverer 600.
In the present invention, the gas-solid separator 400 is a bag filter.
In the present invention, the alcohol recovery device 600 is a rectifying tower, which may be a packed tower or a plate tower.
In the invention, the particle size of the white carbon black product is not higher than 500 nm.
In the invention, the specific surface area of the white carbon black product is not less than 400m2/g。
The embodiments of the present invention are described in detail below, but the technical solution of the process of the present invention is not limited to the following embodiments, and includes any combination, change and modification of the embodiments, and all the improvements and modifications made without departing from the scope of the present invention are within the protection scope of the present invention.
Example 1
A certain chemical plant applies a white carbon black preparation method, tetraalkoxysilane is used as a raw material and reacts with steam of water to generate white carbon black, the reaction temperature does not exceed 300 ℃, and a white carbon black preparation system shown in figure 1 is applied. The tetraalkoxysilane feed is a mixture of tetramethoxysilane and inert gas nitrogen, and the water feed is deionized water having a chloride ion content of less than 1.0 ppm. The volume fraction of nitrogen in the mixture was 95%. The tetramethoxysilane feed temperature in the hydrolysis reactor was 150 ℃. The water feed temperature in the hydrolysis reactor was 150 ℃. The feed molar ratio of tetramethoxysilane to water is 1: 2. the reaction temperature in the hydrolysis reactor was 150 ℃.
In this example, the white carbon black product obtained from the outlet of the packaging machine by using the method and system of the present invention has an average particle size of 148.2nm and a BET specific surface area of 565m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
Example 2
A certain chemical plant applies a white carbon black preparation method, tetraalkoxysilane is used as a raw material and reacts with steam of water in a hydrolysis reactor, the reaction temperature does not exceed 300 ℃, and a white carbon black preparation system shown in figure 1 is applied. The tetraalkoxysilane feed was a mixture of tetraethoxysilane and inert gas nitrogen, and the water feed was deionized water having a chloride ion content of less than 1.0 ppm. The volume fraction of nitrogen in the mixture was 95%. The tetraethoxysilane feed temperature in the hydrolysis reactor was 200 ℃. The water feed temperature in the hydrolysis reactor was 200 ℃. The molar ratio of tetraethoxysilane to water fed is 1: 2. the reaction temperature in the hydrolysis reactor was 200 ℃.
In this example, the white carbon black product obtained from the outlet of the packaging machine by using the method and system of the present invention has an average particle size of 205.3nm and a BET specific surface area of 427m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
Example 3
White carbon black was prepared by using the method and system of example 1, except that the temperature of the hydrolysis reactor was 200 ℃.
In this example, the white carbon black product obtained from the outlet of the packaging machine by using the method and system of the present invention has an average particle size of 192.4nm and a BET specific surface area of 511m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
Example 4
White carbon black was prepared using the method and system of example 1, except that the volume fraction of nitrogen in the mixture of tetramethoxysilane and inert gas nitrogen was 20%.
In this example, the white carbon black product obtained from the outlet of the packaging machine by using the method and system of the present invention has an average particle size of 429.5nm and a BET specific surface area of 405m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
Example 5
White carbon black preparation was performed using the method and system of example 1, except that the molar ratio of tetramethoxysilane to water fed was 1: 20.
in this example, the white carbon black product obtained from the outlet of the packaging machine by using the method and system of the present invention has an average particle size of 152.6nm and a BET specific surface area of 472m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
Example 6
White carbon black was prepared by using the method and system of example 1, except that the tetramethoxysilane feed temperature in the hydrolysis reactor was 120 ℃ and the water feed temperature in the hydrolysis reactor was 100 ℃.
In the present embodiment, the invention is appliedAccording to the method and the system, the white carbon black product obtained from the outlet of the packaging machine has the average particle size of 182.1nm and the BET specific surface area of 489m2(ii)/g, the water content of the methanol obtained from the alcohol recovery unit is not more than 1%.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The preparation method of the white carbon black is characterized in that tetraalkoxysilane is used as a raw material and reacts with steam of water to generate the white carbon black, and the reaction temperature is not more than 300 ℃.
2. The method for preparing white carbon black according to claim 1, wherein the tetraalkoxysilane is one or a mixture of tetramethoxysilane, tetraethoxysilane and tetraisopropoxysilane.
3. The method for preparing white carbon black according to claim 1, wherein the water is deionized water, and the content of chloride ions in the water is less than 1.0 ppm.
4. The method for preparing white carbon black according to claim 1, wherein the tetraalkoxysilane raw material is in a gaseous state and contains an inert carrier gas, and the inert carrier gas has a volume fraction of 0-95% and is different from 0.
5. The method for preparing white carbon black according to claim 1, wherein the feeding temperature of the tetraalkoxysilane raw material is 100-300 ℃, and the feeding temperature of the steam of the water is 120-300 ℃.
6. The method for preparing white carbon black according to claim 1, wherein the feed molar ratio of the tetraalkoxysilane to the steam of water is 1:2 to 1: 20.
7. The system for preparing white carbon black according to any one of claims 1 to 6, wherein the system comprises:
a tetraalkoxysilane vaporizer (100) for vaporizing the introduced tetraalkoxysilane raw material;
a water vaporizer (200) for vaporizing the introduced water;
the hydrolysis reactor (300) is used for reacting gaseous tetraalkoxysilane with water vapor, the hydrolysis reactor (300) is a Venturi type injection reactor and is provided with two feeding holes, one feeding hole is connected with a nozzle, the other feeding hole is an air suction hole, and an outlet of the tetraalkoxysilane vaporizer (100) and an outlet of the water vaporizer (200) are respectively communicated with the nozzle and the air suction hole of the hydrolysis reactor (300);
the gas-solid separator (400) is used for separating gas-solid products, and an outlet of the hydrolysis reactor (300) is communicated with an inlet of the gas-solid separator (400);
the packaging machine (500) is used for collecting the white carbon black product, and a solid phase outlet of the gas-solid separator (400) is communicated with an inlet of the packaging machine (500);
and the alcohol recoverer (600) is used for collecting product alcohol substances, and a gas phase outlet of the gas-solid separator (400) is communicated with an inlet of the alcohol recoverer (600).
8. The system of claim 7, wherein the gas-solid separator (400) is a bag filter.
9. The system of claim 7, wherein the alcohol recycler (600) is a rectification column.
10. The system of claim 9, wherein the rectification column is a packed column or a tray column.
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| CN110167879A (en) * | 2016-10-28 | 2019-08-23 | 株式会社德山 | Fumed silica and preparation method thereof |
| CN113454024A (en) * | 2019-02-21 | 2021-09-28 | 三菱化学株式会社 | Silica particles and method for producing same, silica sol, polishing composition, polishing method, method for producing semiconductor wafer, and method for producing semiconductor device |
| CN113544091A (en) * | 2019-03-06 | 2021-10-22 | 扶桑化学工业株式会社 | Hydrophobic silica powder and toner resin particles |
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