Ether ester preparation and separation system

Abstract

The utility model relates to the technical field of fine chemical engineering, in particular to an ether ester preparation and separation system which comprises a multi-phase reaction kettle, a melting tank, a settling tank, an evaporator, a crude product separation tower, an oligomer separation tower, a medium polymer separation tower, a high polymer separation tower and the like. The ether ester preparation and separation system disclosed by the utility model can be used for separating prepared ether ester products according to requirements so as to obtain products with high content of effective substances, and meanwhile, refluxing substandard products to react again or repeatedly separate the substandard products, so that the quality of the products is improved, and the comprehensive cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fine chemical industry, in particular to an ether ester preparation and separation system. Background Art

[0002] In the prior art, surfactants obtained by using alkoxylation technology and esterification technology are widely used in industries such as daily chemicals, medicine, new energy, textile, printing and dyeing, papermaking, coatings, etc. Traditional preparation technologies have problems such as low content of effective substances in products, scattered process equipment, and high comprehensive energy consumption. Summary of the Utility Model

[0003] The utility model provides an ether ester preparation and separation system to solve the above technical deficiencies, which can separate ester and ether products according to requirements to achieve the required content of effective substances.

[0004] The utility model discloses an ether-ester preparation and separation system, comprising a multiphase reaction kettle, a melting tank, a No. 1 pipeline at the lower end of the melting tank, the No. 1 pipeline is connected to the multiphase reaction kettle, and a discharge pump is arranged on the No. 1 pipeline; a No. 2 pipeline is arranged at the bottom end of the multiphase reaction kettle, the No. 2 pipeline is connected to the top of the multiphase reaction kettle, a circulation pump and a loop heat exchanger are arranged on the No. 2 pipeline in sequence, a No. 3 pipeline is arranged on the No. 2 pipeline between the circulation pump and the loop heat exchanger, the No. 3 pipeline is connected to a sedimentation tank, a No. 4 pipeline is arranged at the bottom end of the sedimentation tank, the No. 4 pipeline is connected to a crude product separation tower, and the No. 4 pipeline is connected to a crude product separation tower. A slurry delivery pump and an evaporator are arranged in sequence on the pipeline; a No. 5 pipeline is arranged at the bottom of the crude product separation tower, the No. 5 pipeline is connected to the oligomer separation tower, and a crude product separation tower delivery pump is arranged on the No. 5 pipeline; a No. 6 pipeline is arranged at the top of the oligomer separation tower, the No. 6 pipeline is connected to the oligomer finished product tank, a No. 7 pipeline is arranged at the bottom of the oligomer separation tower, the No. 7 pipeline is connected to the medium polymer separation tower, and a delivery pump for the oligomer separation tower is arranged on the No. 7 pipeline; a No. 8 pipeline is arranged at the top of the medium polymer separation tower, the No. 8 pipeline is connected to the medium polymer finished product tank, a No. 9 pipeline is arranged at the bottom of the medium polymer separation tower, and the No. 9 pipeline A No. 10 pipeline is connected to the polymer separation tower, and a medium polymer separation tower delivery pump is arranged on the No. 9 pipeline. A No. 10 pipeline is arranged on the top of the polymer separation tower, and the No. 10 pipeline is connected to the polymer finished product tank. A No. 11 pipeline is arranged at the bottom of the polymer separation tower, and the No. 11 pipeline is connected to the polymer collection tank; a primary light component tank is also arranged, and a No. 12 pipeline is arranged at the bottom of the primary light component tank, and the No. 12 pipeline is respectively connected to the top of the melting tank and the top of the multiphase reactor, and a No. 13 pipeline is arranged on the upper end of the primary light component tank, and the No. 13 pipeline is connected to the primary light component separation tower, and a No. 11 pipeline is arranged at the bottom of the primary light component separation tower. There is a No. 14 pipeline, which is connected to the multiphase reactor. A No. 15 pipeline is arranged on the top of the primary light component separation tower, which is connected to the phase separator. The phase separator is provided with a No. 16 pipeline, which extends to the inside of the primary light component separation tower, and the No. 16 pipeline is provided with a light component pump; a No. 17 pipeline is arranged on the phase separator, which is connected to the light component enrichment tank. A No. 18 pipeline is arranged on the top of the crude product separation tower, which is connected to the light component enrichment tank. The light component enrichment tank is provided with a No. 19 pipeline, and the No. 19 pipeline is connected to the multiphase reactor.

[0005] In the above scheme, the melting tank is used to melt the solid raw materials and then transport them to the multiphase reactor through the discharge pump. A stirring device, i.e., a stirring shaft and stirring blades, can be set in the melting tank. The stirring shaft is driven by an external motor to rotate. The No. 12 pipe at the bottom of the primary light component tank is connected to the top of the melting tank. The No. 12 pipe at the top of the melting tank is inclined at 45 degrees. The melting tank can melt the solid materials with high freezing points and premix them with catalysts.

[0006] The multiphase reactor is used for ether and ester reactions.

[0007] The melting tank and the multiphase reactor are both connected to the bottom of the primary light component tank through Pipeline No. 12. The primary light component tank is a dome-bottomed conical container with an internal coil. Steam or compressed air can pass through the coil. When sublimation occurs to the molten material in the melting tank, steam can be introduced into the internal coil so that the sublimated material returns to the melting tank after contacting the lower edge of the coil; when the boiling point of the molten material in the melting tank is relatively low, compressed air can be introduced into the internal coil to form droplets of the volatile material whose flow rate and pressure are reduced when entering the primary light component tank, and then fall back into the melting tank.

[0008] The multiphase reactor, the circulation pump, and the circuit heat exchanger form a reaction circuit for raw material reaction. The circuit heat exchanger can heat or cool the raw materials during the reaction according to actual needs.

[0009] The primary light component tank, the primary light component separation tower, the phase separator, and the light component pump form a primary light component recovery circuit. A condenser can be set on Pipeline No. 15 between the primary light component separation tower and the phase separator. The primary light component recovery circuit is only enabled when the reaction raw materials are low-boiling and volatile substances, and U-shaped seal pipes are provided at the lower parts of the primary light component separation tower and the phase separator. A flow stabilizer plate is provided at the bottom of the phase separator to weaken the turbulent flow of the polar and non-polar liquid phases and improve the separation effect. The primary light component separation tower and the phase separator with this structure are known structures of existing commercially available products and will not be specifically described.

[0010] The settling tank and the slurry transfer pump form a crude product temporary storage system. The settling tank has a conical bottom structure, which can be one or in a parallel form. It is mainly used for temporarily storing the crude product and can also desalt and remove impurities from the ester surfactant product. Filtering equipment can also be provided at the bottom of the settling tank and the inlet of the slurry transfer pump to filter out the salt-forming particles or impurity particles in the crude product. Among them, the slurry transfer pump, the filtering equipment, etc. are all existing commercially available products, and their specific structures will not be elaborated.

[0011] A condenser is set at the upper end of the crude product separation tower, and a reboiler is set at the lower end of the crude product separation tower. This structural form is a known existing structure. The evaporator, the crude product separation tower, and the light component enrichment tank form a raw material recovery system for separating and recovering the raw materials or additives remaining in the crude product. When separating ether products, it mainly realizes the separation of the product from the solvent, additives, and water; when separating ester products, it mainly realizes the separation of the product from water and additives.

[0012] A condenser is set at the upper end of the oligomer separation tower, and a reboiler is set at the lower end of the oligomer separation tower. This structural form is a known existing structure. The oligomer separation tower is used to separate oligomers, and the remaining product is transported into the middle polymer separation tower.

[0013] A condenser is provided at the upper end of the middle polymer separation column, and a reboiler is provided at the lower end of the middle polymer separation column. This structural form is a known structure in the art. The middle polymer separation column is used to separate middle polymers, and the remaining products are transported into the high polymer separation column.

[0014] A condenser is provided at the upper end of the high polymer separation column, and a reboiler is provided at the lower end of the high polymer separation column. This structural form is a known structure in the art. The high polymer separation column is used to separate oligomers, and the remaining products are transported into the middle and high polymer collection tank.

[0015] The polymer collection tank is used to collect highly viscous, ultra-high molecular weight aggregates, residual catalysts, salt-forming particles, impurities, etc.

[0016] A No. 20 pipeline is provided at the top of the oligomer separation column. The No. 20 pipeline is connected to the oligomer fine separator. A No. 21 pipeline is provided at the bottom of the oligomer fine separator. The No. 21 pipeline is connected to the raw material tank. A No. 22 pipeline is provided at the bottom of the oligomer fine separator. The No. 22 pipeline is connected to the No. 6 pipeline.

[0017] The oligomer fine separator is a molecular distillation column, which is a known product in the art. The oligomers separated by the oligomer separation column have a relatively wide range. When the requirements for oligomers are relatively low, the separated substances of the oligomer separation column can be directly collected and stored as oligomers. When the requirements for the residual rates of raw materials and additives are relatively high, the oligomers can be separated again or multiple times through the oligomer fine separator. When separating ether products, the raw material residues can be refluxed to the raw material collection tank for reuse. When separating ester products, the free alcohol or free acid can be recovered and utilized.

[0018] A No. 23 pipeline is provided at the top of the middle polymer separation column. The No. 23 pipeline is connected to the middle polymer fine separator. A No. 24 pipeline is provided at the bottom of the middle polymer fine separator. The No. 24 pipeline is connected to the oligomer finished product tank. A No. 25 pipeline is provided at the bottom of the middle polymer fine separator. The No. 25 pipeline is connected to the No. 8 pipeline.

[0019] The middle polymer fine separator is a molecular distillation column, which is a known product in the art. The middle polymers separated by the middle polymer separation column have a relatively wide range. When the requirements for middle polymers are relatively low, the separated substances of the middle polymer separation column can be directly collected and stored as middle polymers. If the requirements for product purity and some indicators are harsh, the middle polymer fine separator can be activated to separate the middle polymers again or multiple times. Some of the separated products are collected as oligomers, and some of the products that meet the requirements are collected as middle polymers. When separating ether products, it is used for the separation of mono-addition products, di-addition products and multi-addition products; when separating ester products, it is used for the separation of mono-esters and di-esters.

[0020] The top of the polymer separation tower is provided with a No. 26 pipeline, the No. 26 pipeline is connected to the polymer fine separator, the bottom of the polymer fine separator is provided with a No. 27 pipeline, the No. 27 pipeline is connected to the medium polymer finished product tank, the bottom of the polymer fine separator is provided with a No. 28 pipeline, and the No. 28 pipeline is connected to the No. 10 pipeline.

[0021] The polymer fine separator is a molecular distillation tower, which is a known product in the prior art. The polymers separated by the polymer separation tower have a relatively wide range. When the requirements for polymers are relatively low, the separated substances of the polymer separation tower can be directly collected and stored as polymers. When strict requirements are imposed on product purity and some indicators, the polymer fine separator can be activated to separate the polymers again or multiple times. Some of the separated products are collected as medium polymers, and some products that meet the requirements are collected as polymers. When separating ether products, it is used for the refined separation of products with a polymerization degree of 5-25; when separating ester products, it is used for the separation of diesters and triesters.

[0022] Among them, the discharge pump and the circulation pump can be commercially available rotor pumps, which can withstand high-viscosity materials.

[0023] An ether-ester preparation and separation system obtained by the present utility model can separate the prepared ether-ester products according to requirements to obtain products with a high content of effective substances. At the same time, the unqualified products are refluxed for re-reaction or repeated separation, improving product quality and reducing the comprehensive cost. Description of the Drawings

[0024] Figure 1 It is a schematic connection diagram of the equipment system of the present utility model. Detailed Embodiments

[0025] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific embodiments, structures, features, and their effects of the present utility model as follows.

[0026] Example 1:

[0027] As Figure 1As shown in the figure, the present utility model discloses an ether ester preparation and separation system, which includes a multiphase reaction kettle 31, and also a melting tank 29. A first pipeline 1 is provided at the lower end of the melting tank 29, and the first pipeline 1 is connected to the multiphase reaction kettle 31. A discharging pump 30 is provided on the first pipeline 1; a second pipeline 2 is provided at the bottom end of the multiphase reaction kettle 31, and the second pipeline 2 is connected to the top end of the multiphase reaction kettle 31. A circulating pump 32 and a loop heat exchanger 56 are successively provided on the second pipeline 2. A third pipeline 3 is provided on the second pipeline 2 between the circulating pump 32 and the loop heat exchanger 56, and the third pipeline 3 is connected to a settling tank 33. A fourth pipeline 4 is provided at the bottom end of the settling tank 33, and the fourth pipeline 4 is connected to a crude product separation tower 36. A slurry delivery pump 34 and an evaporator 35 are successively provided on the fourth pipeline 4; a fifth pipeline 5 is provided at the bottom end of the crude product separation tower 36, and the fifth pipeline 5 is connected to an oligomer separation tower 38. A crude product separation tower delivery pump 37 is provided on the fifth pipeline 5; a sixth pipeline 6 is provided at the top end of the oligomer separation tower 38, and the sixth pipeline 6 is connected to an oligomer finished product tank 44. A seventh pipeline 7 is provided at the bottom end of the oligomer separation tower 38, and the seventh pipeline 7 is connected to a middle polymer separation tower 40. An oligomer separation tower delivery pump 39 is provided on the seventh pipeline 7. An eighth pipeline 8 is provided at the top end of the middle polymer separation tower 40, and the eighth pipeline 8 is connected to a middle polymer finished product tank 45. A ninth pipeline 9 is provided at the bottom end of the middle polymer separation tower 40, and the ninth pipeline 9 is connected to a high polymer separation tower 42. A middle polymer separation tower delivery pump 41 is provided on the ninth pipeline 9. A tenth pipeline 10 is provided at the top end of the high polymer separation tower 42, and the tenth pipeline 10 is connected to a high polymer finished product tank 46. An eleventh pipeline 11 is provided at the bottom end of the high polymer separation tower 42, and the eleventh pipeline 11 is connected to a polymer collection tank 43; there is also a primary light component tank 51. A twelfth pipeline 12 is provided at the bottom end of the primary light component tank 51, and the twelfth pipeline 12 is respectively connected to the top end of the melting tank 29 and the top end of the multiphase reaction kettle 31. A thirteenth pipeline 13 is provided at the upper end of the primary light component tank 51, and the thirteenth pipeline 13 is connected to a primary light component separation tower 52. A fourteenth pipeline 14 is provided at the bottom end of the primary light component separation tower 52, and the fourteenth pipeline 14 is connected to the multiphase reaction kettle 31. A fifteenth pipeline 15 is provided at the top end of the primary light component separation tower 52, and the fifteenth pipeline 15 is connected to a phase separator 53. The phase separator 53 is provided with a sixteenth pipeline 16, and the sixteenth pipeline 16 extends into the primary light component separation tower 52. A light component pump 54 is provided on the sixteenth pipeline 16; a seventeenth pipeline 17 is provided on the phase separator 53, and the seventeenth pipeline 17 is connected to a light component enrichment tank 55. An eighteenth pipeline 18 is provided at the top end of the crude product separation tower 36, and the eighteenth pipeline 18 is connected to the light component enrichment tank 55. The light component enrichment tank 55 is provided with a nineteenth pipeline 19, and the nineteenth pipeline 19 is connected to the multiphase reaction kettle 31.

[0028] At the top of the oligomer separation column 38, there is a 20th pipeline 20, and the 20th pipeline 20 is connected to the oligomer fine separator 48. At the bottom of the oligomer fine separator 48, there is a 21st pipeline 21, and the 21st pipeline 21 is connected to the raw material tank 47. At the bottom of the oligomer fine separator 48, there is a 22nd pipeline 22, and the 22nd pipeline 22 is connected to the 6th pipeline 6.

[0029] At the top of the middle polymer separation column 40, there is a 23rd pipeline 23, and the 23rd pipeline 23 is connected to the middle polymer fine separator 49. At the bottom of the middle polymer fine separator 49, there is a 24th pipeline 24, and the 24th pipeline 24 is connected to the oligomer finished product tank 44. At the bottom of the middle polymer fine separator 49, there is a 25th pipeline 25, and the 25th pipeline 25 is connected to the 8th pipeline 8.

[0030] At the top of the high polymer separation column 52, there is a 26th pipeline 26, and the 26th pipeline 26 is connected to the high polymer fine separator 50. At the bottom of the high polymer fine separator 50, there is a 27th pipeline 27, and the 27th pipeline 27 is connected to the middle polymer finished product tank. At the bottom of the high polymer fine separator 50, there is a 28th pipeline 28, and the 28th pipeline 28 is connected to the 10th pipeline 10.

[0031] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In this application, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0034] The above are only the preferred embodiments of the present utility model, and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the technical content disclosed above within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simplified modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An ether-ester preparation and separation system, comprising a multiphase reaction kettle, characterized in that: A melting tank is provided, a No. 1 pipeline is provided at the lower end of the melting tank, the No. 1 pipeline is connected to the multiphase reactor, and a discharge pump is provided on the No. 1 pipeline; a No. 2 pipeline is provided at the bottom of the multiphase reactor, the No. 2 pipeline is connected to the top of the multiphase reactor, a circulation pump and a loop heat exchanger are provided on the No. 2 pipeline in sequence, a No. 3 pipeline is provided on the No. 2 pipeline between the circulation pump and the loop heat exchanger, the No. 3 pipeline is connected to the settling tank, a No. 4 pipeline is provided at the bottom of the settling tank, the No. 4 pipeline is connected to the crude product separation tower, and a slurry delivery pump and an evaporator are provided on the No. 4 pipeline in sequence; the crude product A No. 5 pipeline is provided at the bottom of the separation tower, and the No. 5 pipeline is connected to the oligomer separation tower, and a crude product separation tower delivery pump is arranged on the No. 5 pipeline; a No. 6 pipeline is provided at the top of the oligomer separation tower, and the No. 6 pipeline is connected to the oligomer finished product tank; a No. 7 pipeline is provided at the bottom of the oligomer separation tower, and the No. 7 pipeline is connected to the medium polymer separation tower, and a delivery pump for the oligomer separation tower is arranged on the No. 7 pipeline; a No. 8 pipeline is provided at the top of the medium polymer separation tower, and the No. 8 pipeline is connected to the medium polymer finished product tank; a No. 9 pipeline is provided at the bottom of the medium polymer separation tower, and the No. 9 pipeline is connected to the high polymer separation tower. The No. 9 pipeline is provided with a medium polymer separation tower delivery pump, the top of the high polymer separation tower is provided with a No. 10 pipeline, the No. 10 pipeline is connected to the high polymer finished product tank, the bottom of the high polymer separation tower is provided with a No. 11 pipeline, the No. 11 pipeline is connected to the polymer collection tank; a primary light component tank is also provided, the bottom of the primary light component tank is provided with a No. 12 pipeline, the No. 12 pipeline is respectively connected to the top of the melting tank and the top of the multiphase reactor, the upper end of the primary light component tank is provided with a No. 13 pipeline, the No. 13 pipeline is connected to the primary light component separation tower, the bottom of the primary light component separation tower is provided with a No. 14 pipeline, The No. 14 pipeline is connected to the multiphase reaction kettle, the No. 15 pipeline is provided at the top of the primary light component separation tower, the No. 15 pipeline is connected to the phase separator, the phase separator is provided with a No. 16 pipeline, the No. 16 pipeline extends to the inside of the primary light component separation tower, and the No. 16 pipeline is provided with a light component pump; the phase separator is provided with a No. 17 pipeline, the No. 17 pipeline is connected to the light component enrichment tank, the top of the crude product separation tower is provided with a No. 18 pipeline, the No. 18 pipeline is connected to the light component enrichment tank, the light component enrichment tank is provided with a No. 19 pipeline, and the No. 19 pipeline is connected to the multiphase reaction kettle.

2. The ether-ester preparation and separation system according to claim 1, characterized in that: A No. 20 pipeline is provided at the top of the oligomer separation tower, and the No. 20 pipeline is connected to the oligomer fine separator. A No. 21 pipeline is provided at the bottom of the oligomer fine separator, and the No. 21 pipeline is connected to the raw material tank. A No. 22 pipeline is provided at the bottom of the oligomer fine separator, and the No. 22 pipeline is connected to the No. 6 pipeline.

3. The ether-ester preparation and separation system according to claim 1, characterized in that: A No. 23 pipeline is provided at the top of the medium polymer separation tower, and the No. 23 pipeline is connected to the medium polymer fine separator. A No. 24 pipeline is provided at the bottom of the medium polymer fine separator, and the No. 24 pipeline is connected to the oligomer finished product tank. A No. 25 pipeline is provided at the bottom of the medium polymer fine separator, and the No. 25 pipeline is connected to the No. 8 pipeline.

4. The ether-ester preparation and separation system according to claim 1, characterized in that: A No. 26 pipeline is provided at the top of the polymer separation tower, and the No. 26 pipeline is connected to the polymer fine separator. A No. 27 pipeline is provided at the bottom of the polymer fine separator, and the No. 27 pipeline is connected to the finished polymer tank. A No. 28 pipeline is provided at the bottom of the polymer fine separator, and the No. 28 pipeline is connected to the No. 10 pipeline.

Images