Continuous discharging and continuous supplementing system for ethylene carbonate catalyst
By introducing small catalyst pumps and small tanks into the vinyl carbonate catalyst circulation system, the continuous addition of catalyst metering and discharging the waste catalyst through the catalyst recovery pump, the problems of reduced catalyst activity and impurity accumulation are solved, and the catalyst connection is achieved Replenishment operation and active maintenance.
Patent Information
- Application Number
- CN202421188586.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The activity of vinyl carbonate catalysts decreases after reaction, resulting in a long period of catalyst activity, inactivity and increasing impurities in the catalyst circulation system, which requires continuous supplementation of new catalysts.
A vinyl carbonate catalyst continuous replenishment system was designed. By introducing small catalyst pumps and small tanks into the system, the metering and continuous addition of the catalyst is realized, and the waste catalyst is thrown out through the catalyst recovery pump to maintain the activity of the catalyst.
Through this system, the activity of the catalyst can be effectively maintained, the catalyst usage cycle can be extended, impurities accumulation can be reduced, and the catalyst replenishment and discharge operation can be realized.
Smart Images
Figure CN222489968U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of a continuous row and continuous replenishment system, in particular to a continuous row and continuous replenishment system for ethylene carbonate catalysts. Background Art
[0002] Ethylene carbonate (EC) is an organic solvent with excellent performance. It can dissolve a variety of polymers. It can also be used as an organic intermediate to replace ethylene oxide in dioxygenation reactions. It is also the main raw material for producing dimethyl carbonate by transesterification. It can also be used as a raw material for synthesizing furazolidone, water glass slurry, fiber finishing agent, etc. In addition, it is also used in lithium battery electrolytes.
[0003] In actual use, the activity of ethylene carbonate catalyst decreases after entering the reactor to participate in the reaction, so a small amount of new catalyst continuously enters the catalyst circulation system, the catalyst after the reaction and some heavy components enter the catalyst recovery tank, and the unqualified catalyst is sent out through the waste catalyst pump in proportion.
[0004] Therefore, a continuous discharge and replenishment system for ethylene carbonate catalyst is proposed. Utility Model Content
[0005] The main technical problem solved by the utility model is to provide a continuous discharge and replenishment system for ethylene carbonate catalyst, which can solve the problem that the activity of ethylene carbonate catalyst decreases after entering the reactor to participate in the reaction, so a small amount of new catalyst continuously enters the catalyst circulation system, the catalyst after the reaction and part of the heavy components enter the catalyst recovery tank, and the unqualified catalyst is sent out through the waste catalyst pump in proportion.
[0006] To solve the above technical problems, according to one aspect of the utility model, more specifically, a continuous row and continuous replenishment system for ethylene carbonate catalyst, comprising a catalyst preparation kettle, wherein the number of the catalyst preparation kettles is two, and the output ends of the two catalyst preparation kettles are respectively fixedly connected to a catalyst tank one and a catalyst tank two, the output end of the catalyst tank one is fixedly connected to a catalyst pump one, the output end of the catalyst tank two is fixedly connected to a catalyst pump two, the output end of the catalyst pump one is fixedly connected to a reactor one, the output end of the catalyst pump two is fixedly connected to a reactor two, the input ends of the catalyst tank one and the catalyst tank two are fixedly connected to a catalyst recovery pump, and the input end of the catalyst recovery pump is fixedly connected to the catalyst recovery tank one.
[0007] Furthermore, the input ends of the catalyst tank 1 and the catalyst tank 2 are both fixedly connected to a small catalyst pump, and the input end of the small catalyst pump is fixedly connected to a small catalyst tank.
[0008] Furthermore, the output end of the catalyst recovery pump is fixedly connected to the catalyst recovery tank 2, and a flow meter is fixedly connected between the catalyst recovery pump and the catalyst recovery tank 2.
[0009] The beneficial effects of the ethylene carbonate catalyst continuous row and continuous replenishment system of the utility model are:
[0010] The catalyst solution enters two catalyst preparation kettles, and after the catalyst concentration is adjusted, it enters the inside of catalyst tank 1 and catalyst tank 2, and is pumped into reactor 1 and reactor 2 respectively through catalyst pump 1 and catalyst pump 2. The catalyst product produced from the reactor is taken out to catalyst recovery tank 1, and is pumped back to catalyst tank 1 and catalyst tank 2 or to the waste catalyst tank through the catalyst recovery pump;
[0011] Since the original catalyst system had no flow meter from the preparation kettle to the catalyst tank, only the amount of catalyst in one kettle could be added to the system, which resulted in a long period of catalyst in the system, loss of activity and an increase in impurities. A newly added continuous replenishment system with a small catalyst pump is a small catalyst pump. The small catalyst pump is a metering pump that measures the amount of catalyst continuously added to the system, and the catalyst recovery pump throws out an equal amount of waste catalyst to maintain the catalyst in the system at a relatively good activity. With the process of the small catalyst pump, the operation of continuous replenishment and discharge of catalyst can be realized. Continuous replenishment is achieved by the small catalyst tank and the small catalyst pump, and continuous discharge is achieved by the catalyst recovery pump twice to the waste catalyst tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0013] Figure 1 The utility model is a schematic diagram of the overall structure of a continuous row and continuous replenishment system for ethylene carbonate catalyst.
[0014] In the figure: 1. Catalyst preparation kettle; 2. Catalyst tank 1; 3. Catalyst tank 2; 4. Catalyst pump 1; 5. Catalyst pump 2; 6. Reactor 1; 7. Reactor 2; 8. Catalyst recovery pump; 9. Catalyst recovery tank 1; 10. Catalyst small pump; 11. Catalyst small tank; 12. Catalyst recovery tank 2; 13. Flow meter. DETAILED DESCRIPTION
[0015] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.
[0016] According to one aspect of the present invention, Figure 1As shown, a ethylene carbonate catalyst continuous row and continuous replenishment system is provided, including a catalyst preparation kettle 1, the number of catalyst preparation kettles 1 is two, the output ends of the two catalyst preparation kettles 1 are fixedly connected with a catalyst tank 1 2 and a catalyst tank 2 3 respectively, the output end of the catalyst tank 1 2 is fixedly connected with a catalyst pump 1 4, the output end of the catalyst tank 2 3 is fixedly connected with a catalyst pump 2 5, the output end of the catalyst pump 1 4 is fixedly connected with a reactor 1 6, the output end of the catalyst pump 2 5 is fixedly connected with a reactor 2 7, the input ends of the catalyst tank 1 2 and the catalyst tank 2 3 are fixedly connected with a catalyst recovery pump 8, and the input end of the catalyst recovery pump 8 is fixedly connected with a catalyst recovery tank 9;
[0017] The catalyst solution enters two catalyst preparation kettles, and after the catalyst concentration is adjusted, it enters the catalyst tank 1 2 and the catalyst tank 2 3, and is pumped into the reactor 1 6 and the reactor 2 7 respectively through the catalyst pump 1 4 and the catalyst pump 2 5. The catalyst product produced from the reactor is taken out to the catalyst recovery tank 1 9, and is pumped back to the catalyst tank 1 2 and the catalyst tank 2 3 or to the waste catalyst tank through the catalyst recovery pump 8.
[0018] In this embodiment, the input ends of the catalyst tank 1 2 and the catalyst tank 2 3 are both fixedly connected to a catalyst small pump 10, and the input end of the catalyst small pump 10 is fixedly connected to a catalyst small tank 11;
[0019] Since the original catalyst system has no flow meter from the preparation kettle to the catalyst tank, only the amount of catalyst in one kettle can be added to the system, which results in a long period of catalyst in the system, loss of activity and increased impurities. A newly added small continuous replenishment system with a small catalyst pump 10 is a small catalyst pump. The small catalyst pump 10 is a metering pump that measures the amount of catalyst continuously added to the system, and the catalyst recovery pump throws out an equal amount of waste catalyst to maintain the catalyst in the system at a relatively good activity at all times. With the process of the small catalyst pump 10, the operation of continuous replenishment and discharge of the catalyst can be realized.
[0020] In this embodiment, the output end of the catalyst recovery pump 8 is fixedly connected to the catalyst recovery tank 2 12, and a flow meter 13 is fixedly connected between the catalyst recovery pump 8 and the catalyst recovery tank 2 12;
[0021] The flow meter 13 can realize the function of observing the flow rate at the output end when the catalyst continuous replenishment and discharge system is working.
[0022] The working principle of this device is as follows: the catalyst solution enters two catalyst preparation kettles, and after the catalyst concentration is adjusted, it enters the inside of catalyst tank 1 2 and catalyst tank 2 3, and is pumped into reactor 1 6 and reactor 2 7 respectively through catalyst pump 1 4 and catalyst pump 2 5. The catalyst product produced from the reactor is taken out to catalyst recovery tank 1 9, and is pumped back to catalyst tank 1 2 and catalyst tank 2 3 or to the waste catalyst tank through catalyst recovery pump 8;
[0023] Since the original catalyst system had no flow meter from the preparation kettle to the catalyst tank, only the amount of catalyst for one kettle could be added to the system, which resulted in a long period of catalyst in the system, loss of activity and an increase in impurities. A newly added small continuous replenishment system with a small catalyst pump 10 is a small catalyst pump. The small catalyst pump 10 is a metering pump that measures the amount of catalyst continuously added to the system, and the catalyst recovery pump throws out an equal amount of waste catalyst to maintain the catalyst in the system at a relatively good activity. With the process of the small catalyst pump 10, the operation of continuous replenishment and discharge of the catalyst can be realized. The continuous replenishment is achieved by the catalyst tank and the small catalyst pump 10, and the continuous discharge is achieved by the catalyst recovery pump 8 to the waste catalyst tank.
[0024] The electrical components that appear in this article are all electrical components that exist in reality.
[0025] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.
Claims
1. A continuous production and replenishment system for ethylene carbonate catalyst, comprising a catalyst preparation kettle (1), characterized in that: The number of the catalyst preparation kettles (1) is two, and the output ends of the two catalyst preparation kettles (1) are fixedly connected to a catalyst tank one (2) and a catalyst tank two (3), respectively; the output end of the catalyst tank one (2) is fixedly connected to a catalyst pump one (4), the output end of the catalyst tank two (3) is fixedly connected to a catalyst pump two (5), the output end of the catalyst pump one (4) is fixedly connected to a reactor one (6), the output end of the catalyst pump two (5) is fixedly connected to a reactor two (7), the input ends of the catalyst tank one (2) and the catalyst tank two (3) are fixedly connected to a catalyst recovery pump (8), and the input end of the catalyst recovery pump (8) is fixedly connected to a catalyst recovery tank one (9).
2. The ethylene carbonate catalyst continuous row and replenishment system according to claim 1, characterized in that: The input ends of the catalyst tank 1 (2) and the catalyst tank 2 (3) are both fixedly connected to a small catalyst pump (10), and the input end of the small catalyst pump (10) is fixedly connected to a small catalyst tank (11).
3. The ethylene carbonate catalyst continuous row and replenishment system according to claim 1, characterized in that: The output end of the catalyst recovery pump (8) is fixedly connected to the second catalyst recovery tank (12), and a flow meter (13) is fixedly connected between the catalyst recovery pump (8) and the second catalyst recovery tank (12).