CN116589498A - Synthesis method of gamma-chloropropyl alkoxy silane - Google Patents
Synthesis method of gamma-chloropropyl alkoxy silane Download PDFInfo
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- CN116589498A CN116589498A CN202310507674.XA CN202310507674A CN116589498A CN 116589498 A CN116589498 A CN 116589498A CN 202310507674 A CN202310507674 A CN 202310507674A CN 116589498 A CN116589498 A CN 116589498A
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- Prior art keywords
- chloropropyl
- gamma
- esterification
- chloropropene
- alkoxysilane
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- -1 alkoxy silane Chemical compound 0.000 title claims abstract description 19
- 229910000077 silane Inorganic materials 0.000 title claims abstract description 19
- 238000001308 synthesis method Methods 0.000 title claims abstract description 9
- 238000005886 esterification reaction Methods 0.000 claims abstract description 35
- 230000032050 esterification Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000012043 crude product Substances 0.000 claims abstract description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 57
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 29
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 238000007259 addition reaction Methods 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 22
- 238000004321 preservation Methods 0.000 claims description 21
- OWXJKYNZGFSVRC-NSCUHMNNSA-N (e)-1-chloroprop-1-ene Chemical compound C\C=C\Cl OWXJKYNZGFSVRC-NSCUHMNNSA-N 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 125000003545 alkoxy group Chemical group 0.000 claims description 15
- 239000012752 auxiliary agent Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 12
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 claims description 11
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 claims description 11
- 239000005052 trichlorosilane Substances 0.000 claims description 11
- 230000002194 synthesizing effect Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 4
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 4
- 230000008016 vaporization Effects 0.000 claims description 3
- 229910021638 Iridium(III) chloride Inorganic materials 0.000 claims description 2
- 229910021604 Rhodium(III) chloride Inorganic materials 0.000 claims description 2
- VMESOKCXSYNAKD-UHFFFAOYSA-N n,n-dimethylhydroxylamine Chemical compound CN(C)O VMESOKCXSYNAKD-UHFFFAOYSA-N 0.000 claims description 2
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 claims description 2
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 claims description 2
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 6
- 239000006227 byproduct Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- OSDWBNJEKMUWAV-UHFFFAOYSA-N Allyl chloride Chemical compound ClCC=C OSDWBNJEKMUWAV-UHFFFAOYSA-N 0.000 description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- OOXSLJBUMMHDKW-UHFFFAOYSA-N trichloro(3-chloropropyl)silane Chemical compound ClCCC[Si](Cl)(Cl)Cl OOXSLJBUMMHDKW-UHFFFAOYSA-N 0.000 description 3
- 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 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005053 propyltrichlorosilane Substances 0.000 description 2
- 239000005049 silicon tetrachloride Substances 0.000 description 2
- DOEHJNBEOVLHGL-UHFFFAOYSA-N trichloro(propyl)silane Chemical compound CCC[Si](Cl)(Cl)Cl DOEHJNBEOVLHGL-UHFFFAOYSA-N 0.000 description 2
- KSCAZPYHLGGNPZ-UHFFFAOYSA-N 3-chloropropyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)CCCCl KSCAZPYHLGGNPZ-UHFFFAOYSA-N 0.000 description 1
- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
- C07F7/1872—Preparation; Treatments not provided for in C07F7/20
- C07F7/1876—Preparation; Treatments not provided for in C07F7/20 by reactions involving the formation of Si-C linkages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The invention discloses a synthesis method of gamma-chloropropyl alkoxysilane, and relates to the technical field of gamma-chloropropyl alkoxysilane preparation. The synthesis method provided by the invention changes the traditional process sequence, the esterification is carried out before the addition, the content of the esterified addition crude product is about 80%, the byproduct is alkoxy silane, and the product can be directly sold after rectification under the same condition, so that the secondary treatment link is reduced.
Description
Technical Field
The invention relates to the technical field of preparation of gamma-chloropropyl alkoxysilane, in particular to a method for synthesizing gamma-chloropropyl alkoxysilane.
Background
At present, the production process of gamma-chloropropyl alkoxy silane (gamma-chloropropyl trimethoxy silane and gamma-chloropropyl triethoxy silane) (such as China patent of CN104610335A and CN 104086582A) adopts a traditional process route, namely, chloropropene is used for reacting with trichlorosilane to prepare gamma-chloropropyl trichlorosilane, silicon tetrachloride and propyl trichlorosilane are simultaneously byproducts, and the gamma-chloropropyl trichlorosilane is esterified with methanol or ethanol to generate gamma-chloropropyl alkoxy silane, and the silicon tetrachloride and the propyl trichlorosilane are reacted with methanol or ethanol to prepare methyl silicate or ethyl silicate and propyl trimethoxy silane or propyl triethoxy silane for end customers; in the process, the yield and the conversion rate are basically stable at a certain level in the addition process of gamma-chloropropyl trichlorosilane, and the prior yield and conversion rate are difficult to break through by using the traditional route.
Disclosure of Invention
The traditional process route is that the addition is carried out before the esterification, in the mass production, the product content in the crude product of the addition reaction is about 70 percent, the yield of 75 percent is difficult to break through, the addition byproducts are more, the chlorine-containing byproducts are difficult to store, and in order to solve the technical problems, the invention provides a synthesis method of gamma-chloropropyl alkoxy silane, and the product content is improved.
In order to achieve the technical purpose, the invention adopts the following scheme:
the synthesis method of the gamma-chloropropyl alkoxysilane comprises the following steps:
s1, continuously feeding trichlorosilane and methanol or ethanol raw materials into an esterification system to prepare alkoxy hydrosilane;
s2, under the condition of a catalyst and an auxiliary agent, carrying out an addition reaction on alkoxy hydrosilane and chloropropene to prepare gamma-chloropropyl alkoxy silane.
Compared with the prior art, the invention has the beneficial effects that: the synthesis method provided by the invention changes the traditional process sequence, esterification is carried out before addition, the product yield is about 80% of the addition crude product after esterification, the byproduct is alkoxy silane, and the product can be directly sold after rectification under the same condition, so that the secondary treatment link is reduced.
The preferable scheme of the invention is as follows:
pre-esterifying trichlorosilane and methanol or ethanol in a reaction kettle, and allowing the pre-esterified liquid to enter an esterification tower and vaporized methanol or vaporized ethanol for esterification.
In the S1, the mol ratio of trichlorosilane to methanol or ethanol is 1:1-3, the ratio of pre-esterified liquid to vaporized methanol or vaporized ethanol is adjusted along with the pH value of the crude product, and the mol ratio of esterified liquid to vaporized methanol or vaporized ethanol is less than or equal to 1:3.
The pH value of the system after esterification in S1 is between 5 and 6.
1 at 60-120 deg.c and at 0.1-0.5 MPa.
And S2, continuously dropwise adding chloropropene into alkoxy hydrosilane for addition reaction.
The initial dripping temperature of chloropropene is 80-83 ℃, the dripping completion temperature is 85-105 ℃, the dripping time is 65-280 min, and the heat preservation temperature fluctuates up and down by 5 ℃ under the dripping completion temperature after dripping is completed, and the heat preservation time is 2-4 h.
The molar ratio of the alkoxy hydrosilane to the chloropropene in the S2 is 1:1-3.
The catalyst is any one of ruthenium trichloride, rhodium trichloride and iridium trichloride.
The auxiliary agent is any one or more than two of tri-N-butylamine, 2, 4-pentanedione, resorcinol, N-dimethylformamide and N, N-dimethylhydroxylamine.
Drawings
FIG. 1 is a schematic diagram of a synthesis system of gamma-chloropropyl alkoxysilane provided in an embodiment of the present invention;
marked in the figure as: 1. a pre-esterification kettle; 2. a reaction kettle; 3. an esterification tower; 4. a circulation pump; 5. a first-stage condenser; 6. a secondary condenser.
Detailed Description
The present invention will be described in detail with reference to the following embodiments for a full understanding of the objects, features and effects of the present invention, but the present invention is not limited thereto.
Example 1
The synthesis method of the gamma-chloropropyl alkoxysilane comprises the following steps:
s1, continuously feeding raw materials of trichlorosilane and methanol into an esterification system according to a molar ratio of 1:1.
The esterification system comprises a pre-esterification kettle 1, an esterification tower 3, a reaction kettle 2, a circulating pump 4, a primary condenser 5, a secondary condenser 6 and the like, wherein an inlet of the pre-esterification kettle 1 is respectively connected with a trichlorosilane pipeline and a methanol pipeline, an outlet at the bottom of the pre-esterification kettle 1 is communicated with a feeding spray head of the esterification tower 3, the lower part of the esterification tower 3 is communicated with a vaporization methanol pipeline, the bottom of the esterification tower 3 is communicated with the reaction kettle 2 to form a tower kettle structure, the inlet and the outlet of the reaction kettle 2 are circularly communicated through the circulating pump 4, and a crude product rectifying pipeline is connected to the circulating pipeline. The top of the esterification tower 3 and the outlet of the upper end of the pre-esterification kettle are both communicated with a first-stage condenser 5, the first-stage condenser 5 is communicated with a second-stage condenser 6, and the second-stage condenser 6 is connected with an output pipeline; and the outlet of the first-stage condenser 5 and the outlet of the second-stage condenser 6 are respectively communicated with the upper inlet of the esterification tower to realize circulation.
Pre-esterifying trichlorosilane and methanol in a pre-esterifying kettle to esterify one or two chloride ions in the trichlorosilane to form pre-esterified liquid; the pre-esterification liquid enters an esterification tower, the pre-esterification liquid and the vaporized methanol are further reacted to complete the reaction, the ratio of the pre-esterification liquid to the vaporized methanol is adjusted along with the pH value of the crude product, and the molar ratio is not more than 1:3, ensuring the pH value of the crude product to be 5-6, and finally obtaining trimethoxy hydrosilane.
S2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 1000ppm, the catalyst content is 40ppm, the initial dripping temperature of the 3-chloropropene is 82 ℃, the dripping completion temperature is 85 ℃, the dripping time is 280min, the heat preservation temperature is 85-90 ℃, and the heat preservation time is 2h and 4h respectively.
Example 2
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 1000ppm, the catalyst content is 80ppm, the initial dripping temperature of the 3-chloropropene is 81 ℃, the dripping completion temperature is 91 ℃, the dripping time is 81min, the heat preservation temperature is 90-95 ℃, and the heat preservation time is 2h and 4h respectively.
Example 3
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 1000ppm, the catalyst content is 130ppm, the initial dripping temperature of the 3-chloropropene is 81 ℃, the dripping completion temperature is 105 ℃, the dripping time is 86min, the heat preservation temperature is 100-105 ℃, and the heat preservation time is 2h and 4h respectively.
Example 4
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 100ppm, the catalyst content is 40ppm, the initial dropwise adding temperature of 3-chloropropene is 81 ℃, the dropwise adding completion temperature is 90 ℃, the dropwise adding time is 67min, the heat preservation temperature is 85-90 ℃, and the heat preservation time is 2h and 4h respectively.
Example 5
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 100ppm, the catalyst content is 80ppm, the initial dripping temperature of 3-chloropropene is 81 ℃, the dripping completion temperature is 96 ℃, the dripping time is 84min, the heat preservation temperature is 90-95 ℃, and the heat preservation time is 2h and 4h respectively.
Example 6
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 100ppm, the catalyst content is 130ppm, the initial dropwise adding temperature of 3-chloropropene is 81 ℃, the dropwise adding completion temperature is 103 ℃, the dropwise adding time is 65min, the heat preservation temperature is 100-105 ℃, and the heat preservation time is 2h and 4h respectively.
Example 7
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 418ppm, the catalyst content is 40ppm, the dripping temperature of the 3-chloropropene is 80 ℃, the dripping completion temperature is 98 ℃, the dripping time is 81min, the heat preservation temperature is 100-105 ℃, and the heat preservation time is 2h and 4h respectively.
Example 8
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 418ppm, the catalyst content is 80ppm, the initial dripping temperature of the 3-chloropropene is 83 ℃, the dripping completion temperature is 88 ℃, the dripping time is 88min, the heat preservation temperature is 85-90 ℃, and the heat preservation time is 2h and 4h respectively.
Example 9
The same as in step S1 of example 1, except that:
s2, under the condition of a catalyst ruthenium trichloride and an auxiliary agent N, N-dimethylformamide, carrying out an addition reaction on trimethoxy hydrosilane and 3-chloropropene according to a molar ratio of 1:1; in the reaction, chloropropene is continuously dripped into alkoxy hydrosilane to complete the addition reaction, thus preparing gamma-chloropropyl alkoxy silane.
The water content in the raw material 3-chloropropene is 418ppm, the catalyst content is 130ppm, the initial dripping temperature of the 3-chloropropene is 81 ℃, the dripping completion temperature is 95 ℃, the dripping time is 79min, the heat preservation temperature is 90-95 ℃, and the heat preservation time is 2h and 4h respectively.
The results of calculation of the gamma-chloropropylalkoxysilane yield, the 3-chloropropene content and the trimethoxysilane content were carried out on the products obtained in the above examples 1 to 9, respectively, for two time periods, and are shown in the following table.
Finally, it should be noted that: the above list is only a preferred embodiment of the present invention, and it is understood that those skilled in the art can make modifications and variations thereto, and it is intended that the present invention be construed as the scope of the appended claims and their equivalents.
Claims (10)
1. The synthesis method of gamma-chloropropyl alkoxy silane is characterized by comprising the following steps:
s1, continuously feeding trichlorosilane and methanol or ethanol raw materials into an esterification system to prepare alkoxy hydrosilane;
s2, under the condition of a catalyst and an auxiliary agent, carrying out an addition reaction on alkoxy hydrosilane and chloropropene to prepare gamma-chloropropyl alkoxy silane.
2. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 1, wherein the pre-esterification is carried out on trichlorosilane and methanol or ethanol in a reaction kettle, and the pre-esterification liquid obtained by pre-esterification enters an esterification tower and is subjected to esterification reaction by vaporizing methanol or vaporizing ethanol.
3. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 2, wherein the molar ratio of trichlorosilane to methanol or ethanol in S1 is 1:1-3, and the molar ratio of pre-esterified liquid to vaporized methanol or vaporized ethanol is less than or equal to 1:3 along with the adjustment of the pH value of the crude product.
4. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 3, wherein the pH value of the system after esterification in S1 is between 5 and 6.
5. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 1, wherein the esterification temperature of S1 is 60-120 ℃ and the esterification pressure is 0.1-0.5 mpa.
6. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 1, wherein in S2, chloropropene is continuously added dropwise to alkoxysilane for addition reaction.
7. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 6, wherein the initial dropwise addition temperature of chloropropene is 80-83 ℃, the dropwise addition completion temperature is 85-105 ℃, the dropwise addition time is 65-280 min, and the heat preservation temperature after the dropwise addition is up and down fluctuated by 5 ℃ at the dropwise addition completion temperature for 2-4 h.
8. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 6, wherein the molar ratio of alkoxysilane to chloropropene in S2 is 1:1-3.
9. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 1, wherein the catalyst is any one of ruthenium trichloride, rhodium trichloride, and iridium trichloride.
10. The method for synthesizing gamma-chloropropyl alkoxysilane according to claim 1, wherein the auxiliary agent is any one or more of tri-N-butylamine, 2, 4-pentanedione, resorcinol, N-dimethylformamide, and N, N-dimethylhydroxylamine.
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