CN112552176A - Synthesis process of methyl chloroformate - Google Patents
Synthesis process of methyl chloroformate Download PDFInfo
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- CN112552176A CN112552176A CN202011449258.1A CN202011449258A CN112552176A CN 112552176 A CN112552176 A CN 112552176A CN 202011449258 A CN202011449258 A CN 202011449258A CN 112552176 A CN112552176 A CN 112552176A
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
- C07C68/02—Preparation of esters of carbonic or haloformic acids from phosgene or haloformates
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Abstract
The invention discloses a synthesis process of methyl chloroformate, which adopts a two-stage series reaction tower for synthesis, and firstly, the insides of the first-stage reaction tower and the second-stage reaction tower are pumped into a vacuum state through two gas guide pipes. According to the synthesis process of methyl chloroformate, phosgene is introduced through a distribution ring, the unit consumption of phosgene can be effectively reduced, the cost is saved, a new synthesis process is adopted, half of methanol is firstly added into a primary reaction tower, then methanol and phosgene with a certain proportion are simultaneously introduced from the bottom of the primary reaction tower, the reaction temperature is controlled to be 20-30 ℃, methyl chloroformate produced by reaction flows into the middle part of a secondary reaction tower from the top of the primary reaction tower, phosgene with a certain flow rate is introduced from the bottom of the secondary reaction tower to react substances generated by side reactions, and the generated high-content methyl chloroformate flows into a receiving box from the top of the secondary reaction tower, so that the quality of the methyl chloroformate can be effectively improved, the consumption of raw materials and the pressure load of tail gas damage are reduced, and the effects of energy conservation and consumption reduction are.
Description
Technical Field
The invention relates to the technical field of material synthesis processes, in particular to a synthesis process of methyl chloroformate.
Background
Methyl chloroformate, also known as methylcarbonate, of the formula C2H3ClO2The molecular weight is 94.5, the boiling point is 70-72 ℃, the melting point is 61 ℃, the relative density is 1.22, the methyl chloroformate is colorless and transparent liquid with pungent taste, is dissolved in water and is gradually decomposed by the water, the mass production of the methyl chloroformate generally adopts a glass-lined reaction tower, methanol is firstly added into the reaction tower, the reaction temperature is controlled to be 20-30 ℃, and then methanol and phosgene are introduced from the bottom of the tower in the same direction to obtain the methyl chloroformate. The reaction tail gas of the method is frozen and trapped by a condenser, and the reaction formula of the process is as follows2+CH3OH＝C2H3ClO2+ HCl. The process has the advantages of low production capacity, high raw material consumption and poor product quality, the content of the obtained methyl chloroformate is 90 percent, and the yield is 90 percent. The prior art has the following problems
1. The reaction of phosgene and methanol is insufficient, and the feed ratio of phosgene is increased for the quality and yield of methyl chloroformate;
2. the molar ratio of phosgene to methanol is increased, the amount of light-containing tail gas is large, the pressure of a tail gas system is high, and the amounts of liquid caustic soda and wastewater are large;
3. the content of methyl chloroformate in the prior art is 90 percent, and the quality is lower;
in combination with the above problems, one skilled in the art proposes a process for synthesizing methyl chloroformate.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a synthesis process of methyl chloroformate, which solves the following problems:
1. the reaction of phosgene and methanol is insufficient, and the feed ratio of phosgene is increased for the quality and yield of methyl chloroformate;
2. the molar ratio of phosgene to methanol is increased, the amount of light-containing tail gas is large, the pressure of a tail gas system is high, and the amounts of liquid caustic soda and wastewater are large;
3. the content of methyl chloroformate in the prior art is 90 percent, and the quality is lower.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a synthesis process of methyl chloroformate specifically comprises the following steps:
firstly, vacuumizing the interiors of a primary reaction tower and a secondary reaction tower through two gas guide pipes, adjusting the temperature of the interior of the primary reaction tower to be 20-30 ℃ by using a heating rod, introducing methanol into the interior of the primary reaction tower through a feeding pipe on the primary reaction tower, and introducing a mixture of methanol and phosgene into the interior of the primary reaction tower through a feeding assembly at the right end of the primary reaction tower;
secondly, the mixture of methanol and phosgene enters a distribution ring through a material guide pipe, finally the mixture is sprayed out through a feeding hole on the distribution ring, and the sprayed mixture is mixed and reacted with the methanol in the first-stage reaction tower to obtain primary methyl chloroformate;
and step three, connecting a waste discharge pipe with a collecting and purifying device while the mixture and the methanol are subjected to synthesis reaction, collecting and processing waste gas generated in the reaction process, simultaneously leading methyl chloroformate synthesized in the first-stage reaction tower to flow into the middle part of a second-stage reaction tower through a discharge pipe, then leading phosgene into the second-stage reaction tower through a feeding assembly at the right end of the second-stage reaction tower, completely reacting substances generated by side reaction by the phosgene to obtain high-content methyl chloroformate, and finally leading the high-content methyl chloroformate to flow into a receiving box through the discharge pipe to complete the synthesis of the methyl chloroformate.
Preferably, second grade serial-type reaction tower includes mount, one-level reaction tower, second grade reaction tower and receiving box, one-level reaction tower and second grade reaction tower are all fixed at the top of mount, and one-level reaction tower and second grade reaction tower set up side by side, the right-hand member of one-level reaction tower and second grade reaction tower all communicates there is the feeding subassembly, and the one-level reaction tower all communicates with the global left side of second grade reaction tower has the inlet pipe, the left end intercommunication of one-level reaction tower has discharging pipe one, and the inside that the middle part of second grade reaction tower was run through and extend to second grade reaction tower to the one end of discharging pipe one, the inside of one-level reaction tower and second grade reaction tower all rotates and is connected with the synthesis subassembly.
Preferably, the left end of the secondary reaction tower is communicated with a second discharge pipe, and one end of the second discharge pipe penetrates through the receiving box and extends to the inside of the receiving box.
Preferably, the first-stage reaction tower and the second-stage reaction tower are all communicated with a waste discharge pipe on the left side of the periphery, and the first-stage reaction tower and the second-stage reaction tower are all communicated with an air guide pipe on the right side of the periphery.
Preferably, the feeding assembly comprises a material guide pipe, a control valve and a distribution ring, one end of the material guide pipe penetrates through the first-stage reaction tower and extends to the inside of the first-stage reaction tower, the control valve is arranged at the bottom end of the material guide pipe, the distribution ring is located inside the first-stage reaction tower, one end of the material guide pipe extending to the inside of the first-stage reaction tower is communicated with the inside of the distribution ring, and the surface of the distribution ring is equidistantly provided with feeding holes.
Preferably, the synthesis subassembly includes pivot, mixing frame, spacing and heating rod, the one end of pivot is used to go out the one-level reaction tower and extends to the inside of one-level reaction tower, and the pivot extends to the inside fixed surface of one-level reaction tower and is connected with the mixing frame, spacing is located the inside of one-level reaction tower, and the top fixed connection of the top of spacing and one-level reaction tower inner wall, the surface of heating rod and the top fixed connection of one-level reaction tower inner wall, and the top of heating rod runs through the one-level reaction tower and extends to the outside of one-level reaction tower.
Preferably, the working method of the two-stage series reaction tower is as follows:
firstly, vacuumizing the interiors of a primary reaction tower and a secondary reaction tower into a vacuum state through two gas guide pipes, adjusting the temperature inside the primary reaction tower to be 20-30 ℃ by using a heating rod, introducing methanol into the interior of the primary reaction tower through a feeding pipe on the primary reaction tower, and introducing a mixture of methanol and phosgene into the interior of the primary reaction tower by using a feeding assembly at the right end of the primary reaction tower;
the mixture of methanol and phosgene enters the distribution ring through the material guide pipe, and finally the mixture is sprayed out through the material inlet holes on the distribution ring, and the sprayed mixture is mixed and reacted with the methanol in the first-stage reaction tower to obtain preliminary methyl chloroformate;
when the mixture and methanol are subjected to synthesis reaction, a waste discharge pipe is connected with a collection purification device, waste gas generated in the reaction process is collected and treated, methyl chloroformate synthesized in the first-stage reaction tower flows into the middle of a second-stage reaction tower through a discharge pipe, phosgene is introduced into the second-stage reaction tower through a feeding assembly at the right end of the second-stage reaction tower, substances generated by side reaction are completely reacted by the phosgene to obtain high-content methyl chloroformate, and finally the high-content methyl chloroformate flows into a receiving box through the discharge pipe to complete the synthesis of the methyl chloroformate.
(III) advantageous effects
The invention provides a synthesis process of methyl chloroformate. Compared with the prior art, the method has the following beneficial effects:
the synthesis process of methyl chloroformate comprises the steps of arranging a feeding assembly on one side of a first-stage reaction tower and one side of a second-stage reaction tower, wherein the feeding assembly comprises a material guide pipe, a control valve and a distribution ring, one end of the material guide pipe penetrates through the first-stage reaction tower and extends into the first-stage reaction tower, the control valve is arranged at the bottom end of the material guide pipe, the distribution ring is positioned in the first-stage reaction tower, one end of the material guide pipe extending into the first-stage reaction tower is communicated with the distribution ring, feeding holes are formed in the surface of the distribution ring at equal intervals, phosgene is introduced into the first-stage reaction tower and the second-stage reaction tower by utilizing the distribution ring, unit consumption of phosgene can be effectively reduced, cost is saved, a new synthesis process is adopted, half of methanol is firstly added into the first-stage reaction tower, then methanol and phosgene with a certain proportion are introduced from the bottom of, methyl chloroformate produced by the reaction flows into the middle part of the second-stage reaction tower from the top of the first-stage reaction tower, phosgene with a certain flow rate is introduced from the bottom of the second-stage reaction tower to react substances generated by side reactions, and the generated high-content methyl chloroformate flows into the receiving box from the top of the second-stage reaction tower, so that the quality of the methyl chloroformate can be effectively improved, the consumption of raw materials and the pressure load of tail gas destruction are reduced, and the effects of energy conservation and consumption reduction are achieved.
Drawings
FIG. 1 is a schematic diagram of a two-stage series reactor configuration according to the present invention;
FIG. 2 is a schematic diagram of a two-stage reaction column structure according to the present invention;
FIG. 3 is a schematic diagram of the structure of the synthesis module of the present invention.
In the figure, 1, a fixed frame; 2. a first-stage reaction tower; 3. a secondary reaction tower; 4. a receiving box; 5. a feed assembly; 51. a material guide pipe; 52. a control valve; 53. a distribution ring; 6. a feed pipe; 7. a first discharge pipe; 8. a synthesis component; 81. a rotating shaft; 82. a mixing frame; 83. a limiting frame; 84. a heating rod; 9. a discharge pipe II; 10. a waste discharge pipe; 11. an air duct.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a process for synthesizing methyl chloroformate comprises the following steps:
firstly, a second-stage series reaction tower is adopted for synthesis, the interiors of a first-stage reaction tower 2 and a second-stage reaction tower 3 are pumped into a vacuum state through two gas guide pipes 11, the temperature in the first-stage reaction tower 2 is adjusted to be 20 ℃ through a heating rod 84, then methanol is introduced into the first-stage reaction tower 2 through a feeding pipe 6 on the first-stage reaction tower 2, and a mixture of methanol and phosgene is introduced into the first-stage reaction tower 2 through a feeding assembly 5 at the right end of the first-stage reaction tower 2;
secondly, the mixture of methanol and phosgene enters a distribution ring 53 through a material guide pipe 51, finally the mixture is sprayed out through feed holes on the distribution ring 53, and the sprayed mixture is mixed and reacted with methanol in a first-stage reaction tower 2 to obtain primary methyl chloroformate;
step three, connecting a waste discharge pipe 10 with a collecting and purifying device while the mixture and the methanol are subjected to synthesis reaction, collecting and processing waste gas generated in the reaction process, simultaneously, allowing the methyl chloroformate synthesized in the first-stage reaction tower 2 to flow into the middle of a second-stage reaction tower 3 through a discharge pipe I7, introducing phosgene into the second-stage reaction tower 3 through a feeding assembly 5 at the right end of the second-stage reaction tower 3, allowing the phosgene to completely react substances generated by side reaction to obtain high-content methyl chloroformate, and finally allowing the high-content methyl chloroformate to flow into a receiving box 4 through a discharge pipe II 9 to complete synthesis of the methyl chloroformate.
Example 2
Referring to fig. 1-3, a process for synthesizing methyl chloroformate comprises the following steps:
firstly, a second-stage series reaction tower is adopted for synthesis, the interiors of a first-stage reaction tower 2 and a second-stage reaction tower 3 are pumped into a vacuum state through two gas guide pipes 11, the temperature in the first-stage reaction tower 2 is adjusted to be 30 ℃ through a heating rod 84, then methanol is introduced into the first-stage reaction tower 2 through a feeding pipe 6 on the first-stage reaction tower 2, and a mixture of methanol and phosgene is introduced into the first-stage reaction tower 2 through a feeding assembly 5 at the right end of the first-stage reaction tower 2;
secondly, the mixture of methanol and phosgene enters a distribution ring 53 through a material guide pipe 51, finally the mixture is sprayed out through feed holes on the distribution ring 53, and the sprayed mixture is mixed and reacted with methanol in a first-stage reaction tower 2 to obtain primary methyl chloroformate;
step three, connecting a waste discharge pipe 10 with a collecting and purifying device while the mixture and the methanol are subjected to synthesis reaction, collecting and processing waste gas generated in the reaction process, simultaneously, allowing the methyl chloroformate synthesized in the first-stage reaction tower 2 to flow into the middle of a second-stage reaction tower 3 through a discharge pipe I7, introducing phosgene into the second-stage reaction tower 3 through a feeding assembly 5 at the right end of the second-stage reaction tower 3, allowing the phosgene to completely react substances generated by side reaction to obtain high-content methyl chloroformate, and finally allowing the high-content methyl chloroformate to flow into a receiving box 4 through a discharge pipe II 9 to complete synthesis of the methyl chloroformate.
Example 3
Please refer to fig. 1-3, the second-stage tandem reaction tower includes a fixed frame 1, a first-stage reaction tower 2, a second-stage reaction tower 3 and a receiving box 4, the first-stage reaction tower 2 and the second-stage reaction tower 3 are both fixed on the top of the fixed frame 1, and the first-stage reaction tower 2 and the second-stage reaction tower 3 are arranged side by side, the right ends of the first-stage reaction tower 2 and the second-stage reaction tower 3 are both communicated with a feeding component 5, the left sides of the first-stage reaction tower 2 and the second-stage reaction tower 3 are both communicated with a feeding pipe 6, the left end of the first-stage reaction tower 2 is communicated with a discharging pipe one 7, one end of the discharging pipe one 7 penetrates through the middle of the second-stage reaction tower 3 and extends to the inside of the second-stage reaction tower 3.
The left end intercommunication of second grade reaction tower 3 has two 9 discharging pipes, and the inside that receiving box 4 and extension to receiving box 4 are run through to the one end of two 9 discharging pipes, and the one-level reaction tower 2 all communicates with the left side that second grade reaction tower 3 was global has the escape pipe 10, and the one-level reaction tower 2 all communicates with the right side that second grade reaction tower 3 was global has air duct 11.
The feeding assembly 5 comprises a material guide pipe 51, a control valve 52 and a distribution ring 53, one end of the material guide pipe 51 penetrates through the first-stage reaction tower 2 and extends to the inside of the first-stage reaction tower 2, the control valve 52 is arranged at the bottom end of the material guide pipe 51, the distribution ring 53 is located inside the first-stage reaction tower 2, the material guide pipe 51 extends to one end inside the first-stage reaction tower 2 and is communicated with the inside of the distribution ring 53, and feeding holes are formed in the surface of the distribution ring 53 at equal intervals.
And those not described in detail in this specification are well within the skill of those in the art.
The working method of the two-stage series reaction tower is as follows:
firstly, vacuumizing the interiors of a primary reaction tower 2 and a secondary reaction tower 3 into a vacuum state through two gas guide pipes 11, adjusting the temperature inside the primary reaction tower 2 to be 20-30 ℃ by using a heating rod 84, then introducing methanol into the interior of the primary reaction tower 2 through a feeding pipe 6 on the primary reaction tower 2, and simultaneously introducing a mixture of methanol and phosgene into the interior of the primary reaction tower 2 by using a feeding assembly 5 at the right end of the primary reaction tower 2;
the mixture of methanol and phosgene enters a distribution ring 53 through a material guide pipe 51, the mixture is finally sprayed out through feed holes on the distribution ring 53, and the sprayed mixture is mixed and reacted with the methanol in the first-stage reaction tower 2 to obtain preliminary methyl chloroformate;
when the mixture and methanol are subjected to synthesis reaction, a waste discharge pipe 10 is connected with a collection purification device, waste gas generated in the reaction process is collected and treated, methyl chloroformate synthesized in the first-stage reaction tower 2 flows into the middle of a second-stage reaction tower 3 through a discharge pipe I7, phosgene is introduced into the second-stage reaction tower 3 through a feeding assembly 5 at the right end of the second-stage reaction tower 3, substances generated by side reaction are completely reacted by the phosgene to obtain high-content methyl chloroformate, and finally the high-content methyl chloroformate flows into a receiving box 4 through a discharge pipe II 9 to complete the synthesis of the methyl chloroformate.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A synthesis process of methyl chloroformate is characterized in that: the method specifically comprises the following steps:
firstly, a second-stage series reaction tower is adopted for synthesis, the interiors of a first-stage reaction tower (2) and a second-stage reaction tower (3) are pumped into a vacuum state through two gas guide pipes (11), the temperature inside the first-stage reaction tower (2) is adjusted to be 20-30 ℃ by using a heating rod (84), then methanol is introduced into the interior of the first-stage reaction tower (2) through a feeding pipe (6) on the first-stage reaction tower (2), and a mixture of methanol and phosgene is introduced into the interior of the first-stage reaction tower (2) through a feeding assembly (5) at the right end of the first-stage reaction tower (2);
secondly, the mixture of methanol and phosgene enters a distribution ring (53) through a material guide pipe (51), and finally the mixture is sprayed out through feed holes on the distribution ring (53), and the sprayed mixture is mixed and reacted with methanol in a first-stage reaction tower (2) to obtain primary methyl chloroformate;
and step three, connecting a waste discharge pipe (10) with a collecting and purifying device while the mixture and the methanol are subjected to synthesis reaction, collecting and treating waste gas generated in the reaction process, simultaneously, allowing methyl chloroformate synthesized in the first-stage reaction tower (2) to flow into the middle part of the second-stage reaction tower (3) through a discharge pipe I (7), introducing phosgene into the second-stage reaction tower (3) through a feeding assembly (5) at the right end of the second-stage reaction tower (3), allowing the phosgene to completely react substances generated by side reaction to obtain high-content methyl chloroformate, and finally allowing the high-content methyl chloroformate to flow into a receiving box (4) through a discharge pipe II (9) to complete synthesis of the methyl chloroformate.
2. The process of synthesizing methyl chloroformate according to claim 1, wherein: the second-stage serial reaction tower comprises a fixed frame (1), a first-stage reaction tower (2), a second-stage reaction tower (3) and a receiving box (4), the first-stage reaction tower (2) and the second-stage reaction tower (3) are both fixed on the top of the fixing frame (1), the first-stage reaction tower (2) and the second-stage reaction tower (3) are arranged side by side, the right ends of the first-stage reaction tower (2) and the second-stage reaction tower (3) are both communicated with a feeding component (5), the left sides of the circumferential surfaces of the first-stage reaction tower (2) and the second-stage reaction tower (3) are communicated with a feeding pipe (6), the left end of the first-stage reaction tower (2) is communicated with a first discharge pipe (7), one end of the discharge pipe I (7) penetrates through the middle part of the secondary reaction tower (3) and extends to the inside of the secondary reaction tower (3), the insides of the first-stage reaction tower (2) and the second-stage reaction tower (3) are rotatably connected with a synthesis assembly (8).
3. The process of synthesizing methyl chloroformate according to claim 2, wherein: the left end of the secondary reaction tower (3) is communicated with a second discharging pipe (9), and one end of the second discharging pipe (9) penetrates through the receiving box (4) and extends to the inside of the receiving box (4).
4. The process of synthesizing methyl chloroformate according to claim 2, wherein: the left sides of the first-stage reaction tower (2) and the peripheral surface of the second-stage reaction tower (3) are communicated with a waste discharge pipe (10), and the right sides of the first-stage reaction tower (2) and the peripheral surface of the second-stage reaction tower (3) are communicated with an air guide pipe (11).
5. The process of synthesizing methyl chloroformate according to claim 2, wherein: the feeding assembly (5) comprises a material guide pipe (51), a control valve (52) and a distribution ring (53), one end of the material guide pipe (51) penetrates through the first-stage reaction tower (2) and extends to the inside of the first-stage reaction tower (2), the bottom end of the material guide pipe (51) is provided with the control valve (52), the distribution ring (53) is located inside the first-stage reaction tower (2), the material guide pipe (51) extends to the inside of the first-stage reaction tower (2) and is communicated with the inside of the distribution ring (53), and the surface of the distribution ring (53) is equidistantly provided with feeding holes.
6. The process of synthesizing methyl chloroformate according to claim 2, wherein: synthesize subassembly (8) including pivot (81), mixing frame (82), spacing (83) and heating rod (84), the one end of pivot (81) is used to out one-level reaction tower (2) and extends to the inside of one-level reaction tower (2), and pivot (81) extend to the fixed surface of one-level reaction tower (2) inside and be connected with mixing frame (82), spacing (83) are located the inside of one-level reaction tower (2), and the top fixed connection of the top of spacing (83) and one-level reaction tower (2) inner wall, the top fixed connection of the surface of heating rod (84) and one-level reaction tower (2) inner wall, and the top of heating rod (84) runs through one-level reaction tower (2) and extends to the outside of one-level reaction tower (2).
7. The process of synthesizing methyl chloroformate according to claim 1, wherein: the working method of the two-stage series reaction tower is as follows:
firstly, vacuumizing the interiors of a primary reaction tower (2) and a secondary reaction tower (3) into a vacuum state through two gas guide pipes (11), adjusting the temperature of the interior of the primary reaction tower (2) to be 20-30 ℃ by using a heating rod (84), then introducing methanol into the interior of the primary reaction tower (2) through a feeding pipe (6) on the primary reaction tower (2), and simultaneously introducing a mixture of methanol and phosgene into the interior of the primary reaction tower (2) through a feeding assembly (5) at the right end of the primary reaction tower (2);
the mixture of methanol and phosgene enters a distribution ring (53) through a material guide pipe (51), and finally the mixture is sprayed out through feed holes on the distribution ring (53), and the sprayed mixture is mixed and reacted with the methanol in the first-stage reaction tower (2) to obtain primary methyl chloroformate;
when the mixture and methanol are subjected to synthesis reaction, a waste discharge pipe (10) is connected with a collection and purification device, waste gas generated in the reaction process is collected and treated, methyl chloroformate synthesized in the first-stage reaction tower (2) flows into the middle of a second-stage reaction tower (3) through a discharge pipe I (7), phosgene is introduced into the second-stage reaction tower (3) through a feeding assembly (5) at the right end of the second-stage reaction tower (3), substances generated by side reaction are completely reacted by the phosgene to obtain high-content methyl chloroformate, and finally the high-content methyl chloroformate flows into a receiving box (4) through a discharge pipe II (9) to complete the synthesis of the methyl chloroformate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113527102A (en) * | 2021-07-20 | 2021-10-22 | 安徽东至广信农化有限公司 | Synthetic method of methyl chloroformate |
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| GB624604A (en) * | 1943-04-14 | 1949-06-14 | Pittsburg Plate Glass Company | Improvements in or relating to esters of chloroformic acid and the preparation thereof |
| GB1379977A (en) * | 1972-02-04 | 1975-01-08 | Eszakmagyar Vegyimuevek | Method and apparatus for producing chloroformates |
| US4039569A (en) * | 1976-05-11 | 1977-08-02 | Minerec Corporation | Methyl chloroformate process |
| EP0010710A1 (en) * | 1978-11-02 | 1980-05-14 | Bayer Ag | Process for the production of methyl chloroformate |
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| CN113527102A (en) * | 2021-07-20 | 2021-10-22 | 安徽东至广信农化有限公司 | Synthetic method of methyl chloroformate |
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