CN114394991A - Method for catalytically synthesizing vinyl trichlorosilane - Google Patents

Method for catalytically synthesizing vinyl trichlorosilane Download PDF

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CN114394991A
CN114394991A CN202210096523.5A CN202210096523A CN114394991A CN 114394991 A CN114394991 A CN 114394991A CN 202210096523 A CN202210096523 A CN 202210096523A CN 114394991 A CN114394991 A CN 114394991A
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trichlorosilane
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tank
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catalyst
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CN114394991B (en
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段仲刚
周强
张军良
王雄
张则瑜
张敏
徐涛
赵文龙
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ZHEJIANG JINHUA NEW MATERIALS CO Ltd
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    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02Silicon compounds
    • C07F7/08Compounds having one or more C—Si linkages
    • C07F7/12Organo silicon halides
    • C07F7/14Preparation thereof from optionally substituted halogenated silanes and hydrocarbons hydrosilylation reactions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/06Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
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    • C08F212/00Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
    • C08F212/02Monomers containing only one unsaturated aliphatic radical
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Abstract

The invention relates to the technical field of fine chemical engineering, in particular to a method for catalytically synthesizing vinyl trichlorosilane; the method for catalytically synthesizing the vinyl trichlorosilane generates the cocatalyst through polymerization, has a plurality of cocatalyst centers, is favorable for quick hydrosilylation reaction, improves the selectivity of the vinyl trichlorosilane, can be recycled, and greatly reduces the production cost.

Description

Method for catalytically synthesizing vinyl trichlorosilane
Technical Field
The invention relates to the technical field of fine chemical engineering, in particular to a method for catalytically synthesizing vinyl trichlorosilane.
Background
The vinyl trichlorosilane is an important raw material for synthesizing various other vinyl organosilicon coupling agents, and can also be used for modifying chlorine-containing resins (such as polyvinyl chloride and the like) or copolymerizing chlorine-containing monomers.
CN103570756A discloses a method for preparing vinyltrichlorosilane, which comprises the following steps: adding a solvent with the liquid layer height of 400-1600 mm into a mesh plate type distribution reactor, then adding 30-50g/1000L of chloroplatinic acid into the solvent, and controlling the temperature in the mesh plate type distribution reactor to be 50-200 ℃ and the pressure to be 0.01-0.1 MPa; mixing the components in a molar ratio of 1.1-2.0: 1, adding the mixture into the solvent to react fully, recovering the vinyl trichlorosilane in a distillation mode, conveying the residual acetylene into a tail gas leaching tower, purifying and conveying the purified acetylene back to the reaction process. Compared with the prior art, the method for preparing the vinyl trichlorosilane compound has the characteristics of less process steps, less adverse side reactions, high product yield and the like, greatly reduces the usage amount of acetylene and a catalyst, reduces the production cost and ensures the product yield.
CN112007634A discloses a novel catalyst for vinyl trichlorosilane, a preparation method thereof and a method for preparing vinyl trichlorosilane through catalysis, wherein the preparation method of the catalyst comprises the following steps: 1) grafting amino on the porous carrier through an organic amine compound to obtain an amino modified porous carrier; 2) dispersing the amino modified porous carrier in water to obtain a first mixture, adding a chloroplatinic acid aqueous solution into the first mixture, mixing to obtain a second mixture, and drying the second mixture to obtain the novel vinyl trichlorosilane catalyst which is the amino modified porous carrier loaded with chloroplatinic acid. According to the preparation method of the catalyst, the chloroplatinic acid is loaded on the amino-modified porous carrier, so that the active component chloroplatinic acid is uniformly distributed on the surface of the porous carrier, and the product is separated from the catalyst by a filtering technology after catalytic reaction in the catalytic method, so that the purposes of recovering the catalyst and reducing the production cost are achieved.
However, the prior art generally has the technical problem that the selectivity of addition reaction vinyl trichlorosilane is low, so that measures need to be taken to improve the selectivity of products.
Disclosure of Invention
The invention discloses a method for catalytically synthesizing vinyl trichlorosilane, and belongs to the technical field of fine chemical engineering.
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1000-1500 portions of solvent are pumped into a solvent elevated tank through a solvent feed pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after uniform mixing, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 80-90 ℃, adjusting the temperature in the vaporization tank to 60-70 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 35-55%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
More preferably, the solvent in S1 is an inert solvent, including but not limited to: any one of cyclohexane, benzene, toluene, trichloroethane, xylene, trimethylbenzene, dichlorobenzene, chlorobenzene, tetrahydrofuran, acetone, chlorohexane and ethylcyclohexane, or a mixture of any two or more of the solvents;
more preferably, the catalyst in S1 comprises Speier catalyst and/or Karstedt catalyst;
more preferably, the Speier catalyst is an isopropanol solution of chloroplatinic acid and contains cyclohexanone with the same volume as the isopropanol;
more preferably, the Karstedt's catalyst is a complex of chloroplatinic acid and 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane;
more preferably, the preparation method of the cocatalyst in S1 comprises the following steps:
adding 200 parts by weight of deionized water and 300 parts by weight of dispersant into a reaction kettle, and uniformly stirring; then adding 100-110 parts of styrene and 10-20 parts of diallyl isopropylamine; 5-15 parts of vinyl triphenyl phosphonium bromide and 1-4 parts of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80-95 ℃ for 10-15h, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
more preferably, the dispersing agent is selected from one or more of polyvinyl alcohol, octadecyl alcohol polyoxyethylene ether and OP-10;
more preferably, the initiator is selected from one or more of potassium persulfate, sodium bisulfite and 2, 2-azobisisobutylamidine dihydrochloride;
more preferably, the mass ratio of trichlorosilane to catalyst in the S1 is 1: (20-150). times.10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
more preferably, the mass ratio of the trichlorosilane to the catalyst is 1: (30-105). times.10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
more preferably, the mass ratio of trichlorosilane to cocatalyst in S1 is 1: (30-100). times.10-3
More preferably, the reaction pressure in the S1 is 0.01-0.1MPa, and the reaction temperature is 105-110 ℃;
more preferably, the S1 is added into the reaction kettle according to the flow rates of 30-60 kg/h of acetylene and 500 kg/h of trichlorosilane 210-.
The reaction mechanism is as follows:
(1) reacting acetylene with trichlorosilane:
Figure DEST_PATH_IMAGE001
(2) styrene, diallylisopropylamine; the vinyl triphenyl phosphonium bromide generates a resin catalyst through polymerization, has a plurality of cocatalyst centers, is beneficial to the quick progress of hydrosilylation reaction, improves the selectivity, and the cocatalyst is remained in the reactor for continuing the next batch of reaction through filtration.
The invention has the beneficial effects that:
(1) the cocatalyst is generated by polymerization, has a plurality of cocatalyst centers, is beneficial to the quick proceeding of the hydrosilylation reaction, improves the selectivity,
(2) the cocatalyst can be recycled.
Drawings
FIG. 1 is a process flow diagram of example 1.
FIG. 2 is an infrared spectrum of vinyltrichlorosilane prepared in example 3.
The specific implementation mode is as follows:
the invention is further illustrated by the following specific examples:
example 1
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1000g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 80 ℃, adjusting the temperature in the vaporization tank to 60 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 35%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is cyclohexane which is an inert solvent;
the catalyst in the S1 is a Speier catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 200g of deionized water and 1.2g of dispersant into a reaction kettle, and uniformly stirring; then 100g of styrene and 10g of diallyl isopropylamine are added; 5g of vinyl triphenyl phosphonium bromide and 1g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80 ℃ for 10 hours, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersing agent is polyvinyl alcohol;
the initiator is potassium persulfate;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 20X 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 30 x 10-3
The reaction pressure in the S1 is 0.01MPa, and the reaction temperature is 105 ℃;
and adding 30 kg/h of acetylene and 210 kg/h of trichlorosilane into the reaction kettle in the S1.
Example 2
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1000g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 82 ℃, adjusting the temperature in the vaporization tank to 62 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to send acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 40%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is trichloroethane as an inert solvent;
the catalyst in the S1 is a Speier catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 200g of deionized water and 1.5g of dispersant into a reaction kettle, and uniformly stirring; then 100g of styrene and 12g of diallyl isopropylamine are added; 8g of vinyl triphenyl phosphonium bromide and 1g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80 ℃ for 12h, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersing agent is octadecanol polyoxyethylene ether;
the initiator is sodium bisulfite;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 30 x 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 50X 10-3
The reaction pressure in the S1 is 0.03MPa, and the reaction temperature is 105 ℃;
and adding 30 kg/h of acetylene and 280 kg/h of trichlorosilane into the reaction kettle in the S1.
Example 3
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1200g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 84 ℃, adjusting the temperature in the vaporization tank to 64 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to send acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 45%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is trichloroethane as an inert solvent;
the catalyst in the S1 is a Speier catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 250g of deionized water and 2.0g of dispersant into a reaction kettle, and uniformly stirring; then 105g of styrene and 14g of diallyl isopropylamine are added; 10g of vinyl triphenyl phosphonium bromide and 2g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80 ℃ for 15h, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersant is OP-10;
the initiator is 2, 2-azobisisobutylamidine dihydrochloride;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 50X 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 60X 10-3
The reaction pressure in the S1 is 0.05MPa, and the reaction temperature is 105 ℃;
and adding 40 kg/h of acetylene and 320 kg/h of trichlorosilane into the reaction kettle in the S1.
Example 4
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1200g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 86 ℃ and the temperature in the vaporization tank is adjusted to 66 ℃, trichlorosilane is pumped into the vaporization tank, the trichlorosilane enters the reaction kettle and a reaction tower section after being gasified, and simultaneously an acetylene air inlet valve is opened to send acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 50%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is tetrahydrofuran which is an inert solvent;
the catalyst in the S1 is Karstedt catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 250g of deionized water and 2.5g of dispersant into a reaction kettle, and uniformly stirring; then 105g of styrene and 16g of diallyl isopropylamine are added; 12g of vinyl triphenyl phosphonium bromide and 3g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 85 ℃ for 15 hours, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersing agent is polyvinyl alcohol;
the initiator is potassium persulfate;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 80X 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 75X 10-3
The reaction pressure in the S1 is 0.07MPa, and the reaction temperature is 105 ℃;
and adding 50 kg/h of acetylene and 400 kg/h of trichlorosilane into the reaction kettle in the S1.
Example 5
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1200g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 88 ℃, adjusting the temperature in the vaporization tank to 68 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to send acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 50%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is an inert solvent which is chlorohexane;
the catalyst in the S1 is Karstedt catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 300g of deionized water and 3.0g of dispersant into a reaction kettle, and uniformly stirring; then adding 110g of styrene and 18g of diallyl isopropylamine; 14g of vinyl triphenyl phosphonium bromide and 3g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 90 ℃ for 15h, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersing agent is octadecanol polyoxyethylene ether;
the initiator is sodium bisulfite;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 120 x 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 90X 10-3
The reaction pressure in the S1 is 0.09MPa, and the reaction temperature is 110 ℃;
and adding 55 kg/h of acetylene and 450 kg/h of trichlorosilane into the reaction kettle in the S1.
Example 6
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1500g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent and the cocatalyst are uniformly mixed, the solvent is placed into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 90 ℃, adjusting the temperature in the vaporization tank to 70 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 55%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is chlorobenzene which is an inert solvent;
the catalyst in the S1 is Karstedt catalyst;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 300g of deionized water and 3.5g of dispersing agent into a reaction kettle, and uniformly stirring; then adding 110g of styrene and 20g of diallyl isopropylamine; 15g of vinyl triphenyl phosphonium bromide and 4g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 95 ℃ for 15 hours, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersant is OP-10;
the initiator is 2, 2-azobisisobutylamidine dihydrochloride;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 150 x 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 105 is not used10-3
The reaction pressure in the S1 is 0.1MPa, and the reaction temperature is 110 ℃;
and adding 60 kg/h acetylene and 500 kg/h trichlorosilane into the reaction kettle in the S1.
Comparative example 1
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1000g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, a metered cocatalyst is pumped into the solvent elevated tank through a catalyst metering tank, a solvent elevated tank stirring device is started simultaneously, and after the solvent is uniformly mixed, the solvent is put into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 80 ℃, adjusting the temperature in the vaporization tank to 60 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 35%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is cyclohexane which is an inert solvent;
the preparation method of the cocatalyst in the S1 comprises the following steps: adding 200g of deionized water and 1.2g of dispersant into a reaction kettle, and uniformly stirring; then 100g of styrene and 10g of diallyl isopropylamine are added; 5g of vinyl triphenyl phosphonium bromide and 1g of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80 ℃ for 10 hours, discharging after the reaction is finished, washing with water, and drying to obtain a cocatalyst;
the dispersing agent is polyvinyl alcohol;
the initiator is potassium persulfate;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 20X 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 30 x 10-3
The reaction pressure in the S1 is 0.01MPa, and the reaction temperature is 105 ℃;
and adding 30 kg/h of acetylene and 210 kg/h of trichlorosilane into the reaction kettle in the S1.
Comparative example 2
A method for catalytically synthesizing vinyl trichlorosilane is characterized by comprising the following steps:
s1: according to the mass portion, 1000g of solvent is pumped into a solvent elevated tank through a solvent feeding pump, the metered catalyst is pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after the solvent is uniformly mixed, the solvent is put into a reaction kettle. And (3) heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced. When the temperature in the reaction kettle rises to 80 ℃, adjusting the temperature in the vaporization tank to 60 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 35%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping the reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
The solvent in the S1 is cyclohexane which is an inert solvent;
the catalyst in the S1 is a Speier catalyst;
the mass ratio of trichlorosilane to the catalyst in the S1 is 1: 20X 10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid;
the mass ratio of trichlorosilane to cocatalyst in S1 is 1: 30 x 10-3
The reaction pressure in the S1 is 0.01MPa, and the reaction temperature is 105 ℃;
and adding 30 kg/h of acetylene and 210 kg/h of trichlorosilane into the reaction kettle in the S1.
Test results of examples and comparative examples:
item Yield of vinyltrichlorosilane% Vinyl trichlorosilane Selectivity%
Example 1 92.2 95.3
Example 2 93.0 96.5
Example 3 93.2 96.8
Example 4 94.8 97.0
Example 5 95.5 97.2
Example 6 96.9 98.1
Comparative example 1 80.2 85.4
Comparative example 2 75.1 78.8

Claims (13)

1. A method for catalytically synthesizing vinyl trichlorosilane comprises the following operation steps:
s1: according to the mass portion, 1000-1500 portions of solvent are pumped into a solvent elevated tank through a solvent feed pump, the metered catalyst and cocatalyst are pumped into the solvent elevated tank through a catalyst metering tank, meanwhile, a solvent elevated tank stirring device is started, and after uniform mixing, the solvent is put into a reaction kettle; heating the reaction kettle and the flash tank by using steam, and opening a material circulating pump to circularly heat the material when the temperature in the reaction kettle is raised to 70 ℃ and the pressure in the reaction kettle and the atmospheric pressure tend to be balanced; when the temperature in the reaction kettle rises to 80-90 ℃, adjusting the temperature in the vaporization tank to 60-70 ℃, pumping trichlorosilane into the vaporization tank, gasifying the trichlorosilane, feeding the trichlorosilane into the reaction kettle and a reaction tower section, and simultaneously opening an acetylene air inlet valve to feed acetylene into a reaction system to perform addition reaction with the trichlorosilane;
s2: detecting the components of reactants on line, stopping feeding trichlorosilane when the mass component of the vinyltrichlorosilane reaches 35-55%, stopping heating, introducing cooling water into a reaction kettle for cooling, filtering when the temperature is reduced to below 40 ℃, and pumping reaction materials into a crude product storage tank;
s3: after the reaction is finished, pumping the material into a crude product tank, feeding the crude product tank into a separation and purification system, returning the separated trichlorosilane into the reaction system for use, feeding the product vinyltrichlorosilane into a tank area, returning the solvent chlorobenzene into the system, and feeding the double addition product into the tank area.
2. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the solvent in S1 is an inert solvent, including but not limited to: any one of cyclohexane, benzene, toluene, trichloroethane, xylene, trimethylbenzene, dichlorobenzene, chlorobenzene, tetrahydrofuran, acetone, chlorohexane and ethylcyclohexane, or a mixture of any two or more of the solvents.
3. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the catalyst in the S1 comprises a Speier catalyst and/or a Karstedt catalyst.
4. The method of claim 3, wherein the method comprises the steps of: the Speier catalyst is an isopropanol solution of chloroplatinic acid and contains cyclohexanone in equal volume to the isopropanol.
5. The method of claim 3, wherein the method comprises the steps of: the Karstedt catalyst is a complex of chloroplatinic acid with 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane.
6. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the preparation method of the cocatalyst in the S1 comprises the following steps:
adding 200 parts by weight of deionized water and 300 parts by weight of dispersant into a reaction kettle, and uniformly stirring; then adding 100-110 parts of styrene and 10-20 parts of diallyl isopropylamine; 5-15 parts of vinyl triphenyl phosphonium bromide and 1-4 parts of initiator are uniformly stirred; introducing nitrogen, stirring, reacting at 80-95 ℃ for 10-15h, discharging after the reaction is finished, washing with water, and drying to obtain the cocatalyst.
7. The method of claim 6, wherein the method comprises the steps of: the dispersing agent is selected from one or more of polyvinyl alcohol, octadecyl alcohol polyoxyethylene ether and OP-10.
8. The method of claim 6, wherein the method comprises the steps of: the initiator is selected from one or more of potassium persulfate, sodium bisulfite and 2, 2-azobisisobutylamidine dihydrochloride.
9. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the mass ratio of trichlorosilane to the catalyst in the S1 is 1: (20-150). times.10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid.
10. The method of claim 9, wherein the method comprises the steps of: the mass ratio of the trichlorosilane to the catalyst is 1: (30-105). times.10-6Wherein the mixed catalyst is calculated by the amount of chloroplatinic acid.
11. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the mass ratio of trichlorosilane to cocatalyst in S1 is 1: (30-100). times.10-3
12. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the reaction pressure in the S1 is 0.01-0.1MPa, and the reaction temperature is 105-110 ℃.
13. The method for catalytically synthesizing vinyltrichlorosilane according to claim 1, wherein: the S1 is added into the reaction kettle according to the flow rates of 30-60 kg/h of acetylene and 500 kg/h of trichlorosilane 210-5.
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