CN210506159U - Reaction device for continuously preparing 6-aminocapronitrile - Google Patents
Reaction device for continuously preparing 6-aminocapronitrile Download PDFInfo
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- CN210506159U CN210506159U CN201921367869.4U CN201921367869U CN210506159U CN 210506159 U CN210506159 U CN 210506159U CN 201921367869 U CN201921367869 U CN 201921367869U CN 210506159 U CN210506159 U CN 210506159U
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Abstract
The utility model discloses a reaction device for continuously preparing 6-aminocapronitrile, which mainly comprises a liquid ammonia tank, an ammonia buffer tank, an ammonia and caprolactam preheater, a reactor, a condenser, a gas-liquid separator, a caprolactam and 6-aminocapronitrile liquid receiving tank, a caprolactam and 6-aminocapronitrile rectifying tower and a 6-aminocapronitrile product tank which are connected in sequence; the ammonia and the inlet of the caprolactam preheater are connected with a caprolactam raw material tank; the top of the gas-liquid separator is sequentially connected with an ammonia refining tower, an ammonia compressor, a liquid ammonia tank or a liquid ammonia recovery tank. Compared with a batch device, the device can continuously prepare the 6-aminocapronitrile and has the characteristics of low cost and high reactant utilization rate.
Description
Technical Field
The utility model relates to a continuous preparation 6-aminocapronitrile's reaction unit belongs to the chemical plant field.
Background
The melting point of caprolactam is 68-71 ℃, and the boiling point is 270 ℃. The melting point of the 6-aminocapronitrile is-31.3 ℃, and the boiling point is 200.13 ℃. The prior preparation of 6-aminocapronitrile mainly comprises partial hydrogenation of 1, 6-adiponitrile, and the preparation of 6-aminocapronitrile from caprolactam is rare. 6-aminocapronitrile is an important chemical intermediate, and hydrogenation thereof can prepare 1, 6-hexanediamine. 1, 6-hexamethylenediamine is used for the most part for the synthesis of nylon 66 and 610 resins, and also for the synthesis of polyurethane resins, ion exchange resins and hexamethylene diisocyanate, and is used as a curing agent for urea resins, epoxy resins and the like, an organic crosslinking agent and the like, and also as a stabilizer, a bleaching agent for textile and paper industries, an anticorrosive agent for aluminum alloys, an emulsifier for chloroprene rubber and the like.
Patent CN 107739318A introduces a device for preparing 6-aminocapronitrile by a caprolactam liquid phase method, which is a batch reaction device and has low raw material utilization rate and low production efficiency. The continuous reaction has the characteristics of high utilization rate of raw materials and high production efficiency, so the invention of the reaction device for continuously preparing the 6-aminocapronitrile is particularly important.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reaction unit for continuously preparing 6-aminocapronitrile. The device aims to solve a series of problems of low production efficiency and the like caused by the current batch reaction for preparing 6-aminocapronitrile, and can better solve the problems.
A reaction device for continuously preparing 6-aminocapronitrile mainly comprises a liquid ammonia tank, an ammonia buffer tank, an ammonia and caprolactam preheater, a reactor, a condenser, a gas-liquid separator, a caprolactam and 6-aminocapronitrile liquid receiving tank, a caprolactam and 6-aminocapronitrile rectifying tower and a 6-aminocapronitrile product tank which are connected in sequence;
the ammonia and the inlet of the caprolactam preheater are connected with a caprolactam raw material tank;
the top of the gas-liquid separator is sequentially connected with an ammonia refining tower, an ammonia compressor, a liquid ammonia tank or a liquid ammonia recovery tank. At least one device is arranged in each unit, and the ammonia refining tower removes water possibly contained in the ammonia and entrained liquid feed liquid.
Caprolactam in the caprolactam raw material tank is liquid, and an outlet of the caprolactam raw material tank is connected with an inlet of an ammonia gas and a caprolactam preheater; the outlet of the liquid ammonia tank is connected with the inlet of the ammonia buffer tank; an outlet of the ammonia buffer tank is connected with an inlet of the ammonia gas and caprolactam preheater; the outlet of the ammonia gas and caprolactam preheater is connected with the inlet of the reactor; the outlet of the reactor is connected with the inlet of the condenser; the outlet of the condenser is connected with the inlet of the gas-liquid separator; a liquid outlet of the gas-liquid separator is connected with an inlet of a caprolactam and 6-aminocapronitrile liquid receiving tank; the outlet of a caprolactam and 6-aminocapronitrile liquid receiving tank is connected with the inlet of a caprolactam and 6-aminocapronitrile rectifying tower, the bottom of the caprolactam and 6-aminocapronitrile rectifying tower is connected with a caprolactam raw material tank, the top of the caprolactam and 6-aminocapronitrile rectifying tower is connected with a 6-aminocapronitrile product tank, 6-aminocapronitrile and caprolactam which does not participate in the reaction are respectively obtained after the rectification of the caprolactam and 6-aminocapronitrile rectifying tower, and the caprolactam is recovered to the caprolactam raw material tank to continuously participate in the reaction; the gas outlet of the gas-liquid separator is connected with the inlet of the ammonia refining tower; the outlet of the ammonia refining tower is connected with the inlet of an ammonia compressor; the outlet of the ammonia compressor is connected with the liquid ammonia tank, and the liquid ammonia is recycled.
The device can achieve the effect of continuous feeding and continuous discharging in the process of preparing 6-aminocapronitrile, and improves the production efficiency.
The utility model discloses a have following effect:
(1) compared with the batch reaction for preparing 6-aminocapronitrile, the device has continuous operation and improves the production efficiency;
(2) in the operation process of the device, the utilization rate of caprolactam and ammonia gas is high, and the production cost can be reduced.
Drawings
FIG. 1: a reaction device for continuously preparing 6-aminocapronitrile.
In fig. 1, the structures represented by the respective reference numerals are as follows:
1. a caprolactam raw material tank, a is a caprolactam raw material pipeline; 2. a liquid ammonia tank, b is an ammonia pipeline; 3. the ammonia buffer tank is a mixing pipeline before caprolactam and ammonia are preheated; 4. ammonia and caprolactam preheater, d is a mixing tube after preheating caprolactam and ammonia; 5. the reactor e is a mixed material liquid pipeline after reaction; 6. f is a condensed mixture liquid pipeline 7 and a gas-liquid separator, and g is a caprolactam and 6-aminocapronitrile mixing pipeline; 8. a caprolactam and 6-aminocapronitrile liquid receiving tank; 9. a caprolactam and 6-aminocapronitrile rectifying tower, wherein h is a 6-aminocapronitrile pipeline, i is an unreacted caprolactam pipeline, and caprolactam is recycled; 10. a 6-aminocapronitrile product tank; j is an ammonia pipeline after gas-liquid separation; 11. an ammonia refining tower, wherein k is a refined ammonia pipeline; 12. and an ammonia gas compressor, wherein m is a liquid ammonia pipeline.
Detailed Description
The principles and features of the present invention will be described with reference to the accompanying drawings, which are provided for illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in figure 1, a reaction device for continuously preparing 6-aminocapronitrile mainly comprises a liquid ammonia tank 2, an ammonia buffer tank 3, an ammonia and caprolactam preheater 4, a reactor 5, a condenser 6, a gas-liquid separator 7, a caprolactam and 6-aminocapronitrile liquid receiving tank 8, a caprolactam and 6-aminocapronitrile rectifying tower and a 6-aminocapronitrile product tank 10 which are connected in sequence;
the ammonia gas and the inlet of a caprolactam preheater 4 are connected with a caprolactam raw material tank 1;
the top of the gas-liquid separator 7 is sequentially connected with an ammonia refining tower 11, an ammonia compressor 12, a liquid ammonia tank 2 or a liquid ammonia recovery tank. At least one device contained in each unit, namely an ammonia refining tower 11, removes water possibly contained in the ammonia and entrained liquid feed liquid.
Caprolactam in the caprolactam raw material tank 1 is liquid, and an outlet of the caprolactam raw material tank 1 is connected with an inlet of an ammonia gas and caprolactam preheater 4; the outlet of the liquid ammonia tank 2 is connected with the inlet of the ammonia buffer tank 3; an outlet of the ammonia buffer tank 3 is connected with an inlet of an ammonia preheater 4 for caprolactam; the outlet of the ammonia gas and caprolactam preheater 4 is connected with the inlet of the reactor 5; the outlet of the reactor 5 is connected with the inlet of the condenser 6; the outlet of the condenser 6 is connected with the inlet of the gas-liquid separator 7; a liquid outlet of the gas-liquid separator 7 is connected with an inlet of a caprolactam and 6-aminocapronitrile liquid receiving tank 8; the outlet of a caprolactam and 6-aminocapronitrile liquid receiving tank 8 is connected with the inlet of a caprolactam and 6-aminocapronitrile rectifying tower 9, the bottom of the caprolactam and 6-aminocapronitrile rectifying tower 9 is connected with a caprolactam raw material tank 1, the top of the caprolactam and 6-aminocapronitrile rectifying tower 9 is connected with a 6-aminocapronitrile product tank 10, 6-aminocapronitrile and caprolactam which does not participate in the reaction are respectively obtained after the rectification of the caprolactam and 6-aminocapronitrile rectifying tower 9, and the caprolactam is recovered to the caprolactam raw material tank 1 to continuously participate in the reaction; a gas outlet of the gas-liquid separator 7 is connected with an inlet of the ammonia refining tower 11; the outlet of the ammonia refining tower 11 is connected with the inlet of an ammonia compressor 12; the outlet of the ammonia gas compressor 12 is connected with the liquid ammonia tank 2, and the liquid ammonia is recycled. The caprolactam raw material tank 1 is provided with a feed inlet, and caprolactam which does not participate in the reaction is connected with the feed inlet; the ammonia refining tower 11 removes water possibly contained in the ammonia and entrained liquid feed liquid.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (3)
1. A reaction device for continuously preparing 6-aminocapronitrile mainly comprises a liquid ammonia tank, an ammonia buffer tank, an ammonia and caprolactam preheater, a reactor, a condenser, a gas-liquid separator, a caprolactam and 6-aminocapronitrile liquid receiving tank, a caprolactam and 6-aminocapronitrile rectifying tower and a 6-aminocapronitrile product tank which are connected in sequence;
the ammonia and the inlet of the caprolactam preheater are connected with a caprolactam raw material tank;
the top of the gas-liquid separator is sequentially connected with an ammonia refining tower, an ammonia compressor, a liquid ammonia tank or a liquid ammonia recovery tank.
2. The reactor apparatus of claim 1, wherein: the ammonia liquid tank, the ammonia gas buffer tank, the ammonia gas and caprolactam preheater, the reactor, the condenser, the gas-liquid separator, the caprolactam and 6-aminocapronitrile liquid receiving tank, the caprolactam and 6-aminocapronitrile rectifying tower, the 6-aminocapronitrile product tank, the caprolactam raw material tank, the ammonia refining tower, the ammonia compressor, the ammonia liquid tank or the liquid ammonia recovery tank respectively contain at least one.
3. The reactor apparatus of claim 1, wherein: the outlet of the caprolactam raw material tank is connected with the inlet of the ammonia gas and the caprolactam preheater; the outlet of the liquid ammonia tank is connected with the inlet of the ammonia buffer tank; an outlet of the ammonia buffer tank is connected with an inlet of the ammonia gas and caprolactam preheater; the outlet of the ammonia gas and caprolactam preheater is connected with the inlet of the reactor; the outlet of the reactor is connected with the inlet of the condenser; the outlet of the condenser is connected with the inlet of the gas-liquid separator; a liquid outlet of the gas-liquid separator is connected with an inlet of a caprolactam and 6-aminocapronitrile liquid receiving tank; the outlet of the caprolactam and 6-aminocapronitrile liquid receiving tank is connected with the inlet of a caprolactam and 6-aminocapronitrile rectifying tower, the bottom of the caprolactam and 6-aminocapronitrile rectifying tower is connected with a caprolactam raw material tank, the top of the caprolactam and 6-aminocapronitrile rectifying tower is connected with a 6-aminocapronitrile product tank, and the gas outlet of the gas-liquid separator is connected with the inlet of an ammonia refining tower; the outlet of the ammonia refining tower is connected with the inlet of an ammonia compressor; the outlet of the ammonia compressor is connected with a liquid ammonia recovery tank of the liquid ammonia tank.
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| CN201921367869.4U CN210506159U (en) | 2019-08-21 | 2019-08-21 | Reaction device for continuously preparing 6-aminocapronitrile |
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| CN201921367869.4U CN210506159U (en) | 2019-08-21 | 2019-08-21 | Reaction device for continuously preparing 6-aminocapronitrile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115260058A (en) * | 2022-09-26 | 2022-11-01 | 中国天辰工程有限公司 | Method for preparing 6-aminocapronitrile from caprolactam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115260058A (en) * | 2022-09-26 | 2022-11-01 | 中国天辰工程有限公司 | Method for preparing 6-aminocapronitrile from caprolactam |
| CN115260058B (en) * | 2022-09-26 | 2023-01-10 | 中国天辰工程有限公司 | Method for preparing 6-aminocapronitrile from caprolactam |
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Effective date of registration: 20220208 Address after: 210046 Room 501, C4 building, No. 2, Zidong Road, Maqun street, Qixia District, Nanjing, Jiangsu Province Patentee after: JIANGSU KAIMEI PURUI ENGINEERING TECHNOLOGY Co.,Ltd. Address before: 116000 Dalian, Liaoning province Pu Bay New Area Pine Island chemical industrial park through nine road. Patentee before: CHINA CATALYST HOLDING Co.,Ltd. |
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