Isopropylhydroxylamine rectification system
Through the isopropyl hydroxylamine distillation system under vacuum conditions, multiple distillation and reflux pipeline connections are used to solve the problem of difficult control of the boiling point in the preparation of isopropyl hydroxylamine, and the production of high-purity isopropyl hydroxylamine is achieved.
Patent Information
- Application Number
- CN202422468130.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In the prior art, during the preparation of isopropyl hydroxylamine, the boiling point is difficult to accurately control, resulting in more impurities in the prepared isopropyl hydroxylamine, which reduces the preparation effect.
The isopropyl hydroxylamine distillation system under vacuum conditions is adopted, including a reactor, the first and second distillation columns, a condenser and a collection storage tank. The refined preparation of isopropyl hydroxylamine is achieved through multiple distillation and reflux pipelines.
The preparation accuracy of isopropyl hydroxylamine is improved, and the production of isopropyl hydroxylamine is achieved.
Smart Images
Figure CN223263436U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isopropylhydroxylamine preparation, in particular to an isopropylhydroxylamine distillation system. Background Art
[0002] N-isopropylhydroxylamine, with the molecular formula (CH3)2CHNH(OH), abbreviated as IPHA, is a secondary alkylhydroxylamine derivative and a medium-strength organic reducing agent. With its excellent physical and chemical properties, it is widely used as a polymerization inhibitor and end-polymerization inhibitor for olefin monomers. In addition, N-isopropylhydroxylamine can also be used as a high-efficiency antioxidant, a stabilizer for photographic emulsions, a color regulator for color photography, and an intermediate in organic synthesis, with promising market applications.
[0003] In the prior art, when preparing N-isopropylhydroxylamine, a single distillation tower is generally used to distill an aqueous solution of isopropylhydroxylamine. The boiling point of the isopropylhydroxylamine is controlled to vaporize the isopropylhydroxylamine, and then the isopropylhydroxylamine is liquefied and collected using a condenser. Due to the different components in the aqueous solution of isopropylhydroxylamine, its boiling point is difficult to accurately control, which easily results in the prepared isopropylhydroxylamine containing a high level of impurities, thereby reducing the preparation effect. Utility Model Content
[0004] The utility model aims to provide an isopropylhydroxylamine distillation system to overcome the above problems or at least partially solve the above problems.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is specifically implemented as follows:
[0006] The utility model provides an isopropylhydroxylamine distillation system, comprising a distillation system under vacuum conditions, wherein the vacuum system controls the vacuum degree between -0.07 MPa and -0.090 MPa, and comprises a reactor, a first distillation tower, a second condenser, the second distillation tower, the second condenser, and a collection storage tank, wherein the liquid outlet of the reactor is connected to the liquid inlet of the first distillation tower through a pipeline, the gas outlet of the first distillation tower is connected to the gas inlet of the first condenser through a pipeline, the liquid outlet of the first condenser is connected to the liquid inlet of the second distillation tower through a pipeline, the gas outlet of the second distillation tower is connected to the gas inlet of the second condenser through a pipeline, and the liquid outlet of the second condenser is connected to the collection storage tank through a pipeline.
[0007] As a further solution of the present invention, the liquid outlet of the second distillation tower is connected to the liquid inlet of the first distillation tower through a second reflux pipe.
[0008] As a further solution of the present invention, the liquid outlet of the first distillation tower is connected to the liquid inlet of the reactor through a first reflux pipe.
[0009] The utility model provides an isopropylhydroxylamine distillation system, which has the beneficial effects of achieving the purpose of fine preparation of isopropylhydroxylamine by performing multiple distillations on isopropylhydroxylamine, with high preparation precision of the isopropylhydroxylamine, and also achieving the purpose of cyclic preparation through a first reflux pipe and a second reflux pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0011] Figure 1 It is a structural diagram of the present utility model.
[0012] In the figure: 1. Reactor; 2. First distillation tower; 3. First condenser; 4. Second distillation tower; 5. Second condenser; 6. Collection tank; 7. First reflux pipe; 8. Second reflux pipe. DETAILED DESCRIPTION
[0013] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0014] See also Figure 1 An isopropylhydroxylamine distillation system provided by an embodiment of the present invention includes a distillation system under vacuum conditions, wherein the vacuum system controls the vacuum degree between -0.07 MPa and -0.090 MPa, and includes a reactor 1, a first distillation tower 2, a second condenser 5, a second distillation tower 4, a second condenser 5, and a collection storage tank 6. The liquid outlet of the reactor 1 is connected to the liquid inlet of the first distillation tower 2 through a pipeline, the gas outlet of the first distillation tower 2 is connected to the gas inlet of the first condenser 3 through a pipeline, the liquid outlet of the first condenser 3 is connected to the liquid inlet of the second distillation tower 4 through a pipeline, the gas outlet of the second distillation tower 4 is connected to the gas inlet of the second condenser 5 through a pipeline, and the liquid outlet of the second condenser 5 is connected to the collection storage tank 6 through a pipeline.
[0015] The liquid outlet end of the second distillation tower 4 is connected to the liquid inlet end of the first distillation tower 2 through a second reflux pipe 8 for easy connection.
[0016] The liquid outlet end of the first distillation tower 2 is connected to the liquid inlet end of the reactor 1 through a first reflux pipe 7 .
[0017] During use, the utility model pours raw materials into the reactor 1, and a mixed aqueous solution of isopropylhydroxylamine is prepared in the reactor 1, and then the mixed aqueous solution of isopropylhydroxylamine is injected into the first distillation tower 2 through a pipeline, and contacts with the hot steam moving from bottom to top in the first distillation tower 2. The temperature of the hot steam at this time is controlled at 60-100° C., and is used to perform preliminary gasification treatment on the isopropylhydroxylamine. Then, the gasified isopropylhydroxylamine enters the first condenser 3 through a pipeline and is liquefied in the first condenser 3. Subsequently, the liquefied isopropylhydroxylamine liquid enters the second distillation tower 4 through a pipeline and is subjected to secondary evaporation and gasification in the second distillation tower 4. At this time, The temperature of the hot steam is controlled at 40-80° C., and the vaporized isopropylhydroxylamine is then sent to the second condenser 5 through a pipeline for secondary liquefaction. Finally, the liquefied isopropylhydroxylamine is sent to the collection tank 6 for collection. At the same time, in the preparation process, the isopropylhydroxylamine liquid produced in the second distillation tower 4 is refluxed to the first distillation tower 2 through the second reflux pipe 8 for circulation evaporation and degassing, while the isopropylhydroxylamine liquid produced in the first distillation tower 2 is returned to the reactor 1 through the first reflux pipe 7 for remixing, thereby achieving the purpose of cyclic preparation of isopropylhydroxylamine, and by finely vaporizing the isopropylhydroxylamine, the preparation accuracy of the isopropylhydroxylamine is improved.
[0018] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.
Claims
1. An isopropylhydroxylamine distillation system, comprising a distillation system under vacuum conditions, characterized in that: The invention comprises a reactor (1), a first distillation tower (2), a second condenser (5), a second distillation tower (4), a second condenser (5) and a collection storage tank (6), wherein the liquid outlet of the reactor (1) is connected to the liquid inlet of the first distillation tower (2) through a pipeline, the gas outlet of the first distillation tower (2) is connected to the gas inlet of the first condenser (3) through a pipeline, the liquid outlet of the first condenser (3) is connected to the liquid inlet of the second distillation tower (4) through a pipeline, the gas outlet of the second distillation tower (4) is connected to the gas inlet of the second condenser (5) through a pipeline, and the liquid outlet of the second condenser (5) is connected to the collection storage tank (6) through a pipeline.
2. An isopropylhydroxylamine distillation system according to claim 1, characterized in that, The liquid outlet end of the second distillation tower (4) is connected to the liquid inlet end of the first distillation tower (2) through a second reflux pipe (8).
3. An isopropylhydroxylamine distillation system according to claim 1, characterized in that: The liquid outlet of the first distillation tower (2) is connected to the liquid inlet of the reaction kettle (1) via a first reflux pipe (7).