Production device for removing formaldehyde from alkylation reaction liquid
By designing a formaldehyde removal device including a reactor, a pretreatment kettle, a dealdehyde removal reactor, a distillation tower and a condenser, the harm of formaldehyde to product quality and the environment is solved, and a low-cost and efficient formaldehyde removal is achieved. The removal effect ensures the corrosion resistance and environmental protection of the equipment.
Patent Information
- Application Number
- CN202323460884.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-18
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-18
AI Technical Summary
In the prior art, formaldehyde, as a by-product in organic synthesis, has a great impact on product quality and a great harm to the environment and human health. Moreover, its removal technology has not yet been industrialized, which has problems of environmental protection and cost-effectiveness.
A production device for removing formaldehyde by alkylation reaction liquid is designed, including a reactor, a pretreatment kettle, a dealdehyde reaction kettle, a distillation tower, a condenser and a reflux tank. Through continuous inlet and discharge of materials and recirculation of reflux, the Hot and circulating water control temperature, and enamel materials are used to build corrosion-resistant equipment to achieve effective removal of formaldehyde.
It achieves a formaldehyde removal effect with reasonable structure, simple operation, environmental protection and low production cost, ensures the corrosion resistance and long life of the equipment, and effectively reduces the harm of formaldehyde to the environment and the human body.
Smart Images
Figure CN222267083U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an organic chemical synthesis device, in particular to a production device for removing formaldehyde from alkylation reaction liquid. Background Art
[0002] Formaldehyde is a colorless aqueous solution or gas with a pungent odor. It can be miscible with organic solvents such as water, ethanol, and acetone in any proportion. The liquid is easy to become turbid when stored for a long time in a relatively cold environment. At low temperatures, it forms trioxymethylene precipitation. Some formaldehyde escapes during evaporation, but most of it becomes trioxymethylene. This product is a strong reducing agent, and its reducing properties are stronger when it is alkaline in trace amounts. It can be slowly oxidized into formic acid in the air. The main harm of formaldehyde is its irritation to the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable. A formaldehyde concentration greater than 0.08m3 can cause red eyes, itchy eyes, throat discomfort or pain, hoarseness, sneezing, chest tightness, asthma, dermatitis, etc. The formaldehyde content in newly renovated rooms is high, which is the main cause of many diseases.
[0003] Formaldehyde is a by-product of organic synthesis, which has a great impact on product quality and causes great harm to environmental pollution and human health. The industrialization of formaldehyde removal has good market prospects and environmental benefits. Utility Model Content
[0004] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a production device for removing formaldehyde from alkylation reaction liquid.
[0005] According to the technical solution provided in the embodiments of this application,
[0006] The invention discloses a production device for removing formaldehyde from alkylation reaction liquid. The outlet of a reactor is connected to the inlet of an intermediate tank through a pipeline. The outlet of the intermediate tank is connected to a pretreatment feed pump. The outlet of the pretreatment feed pump is connected to the inlet of a pretreatment reactor. The outlet of the pretreatment reactor is connected to the inlet of one side of a dealdehyde reactor. The outlet of the dealdehyde reactor is connected to the inlet of one side of an upper part of a distillation tower. The top of the distillation tower is connected to the inlet of a tower top condenser. The outlet of the tower top condenser is connected to the inlet of a reflux tank. The outlet of the reflux tank is connected to the inlet of a reflux pump. The outlet of the reflux pump is connected to the inlet of the other side of the upper part of the distillation tower. The outlet of the distillation tower reactor is connected to the inlet of a reactor liquid pump. The outlet of the reactor liquid pump is respectively connected to the inlet of a dealdehyde condenser and a dilution reactor. The outlet of the dealdehyde condenser is connected to the inlet of the other side of the dealdehyde reactor.
[0007] In the utility model, the jacket inside the reaction kettle is equipped with hot water and circulating water.
[0008] In the utility model, the pretreatment kettle and the dealdehyde reaction kettle can be continuously loaded and unloaded.
[0009] In the utility model, the liquid in the bottom of the rectification tower is refluxed and circulated to remove the aldehydes to meet the requirements.
[0010] In the utility model, the pretreatment kettle is an enamel kettle, and the internal accessories and the stirrer are also enamel.
[0011] In summary, the beneficial effects of this application are:
[0012] 1. Reasonable structure, simple operation, environmental protection and low production cost.
[0013] 2. The jacket of the reactor is equipped with hot water and circulating water, which is convenient for controlling the temperature of the reactor; the decatalytic neutralization reactor and the dealdehyde reactor can be continuously loaded and unloaded, which is easy to operate and avoids material leakage.
[0014] 3. The distillation tower bottom liquid is refluxed to remove formaldehyde to meet the requirements. If the indicators are not met, it can be kept until it is qualified. The decatalytic neutralization kettle is an enameled kettle, and the internal accessories and agitator are also enameled. In the acidic system, it has good corrosion resistance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0016] Figure 1 It is a schematic diagram of the structure of the utility model.
[0017] Numbers in the figure: reactor-1, intermediate tank-2, pretreatment feed pump-3, pretreatment reactor-4, dealdehyde reaction reactor-5, distillation tower-6, top condenser-7, reflux tank-8, reflux pump-9, bottom liquid pump-10, dealdehyde condenser-11, dilution tank-12. DETAILED DESCRIPTION
[0018] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.
[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0020] like Figure 1 As shown, a production device for removing formaldehyde from alkylation reaction liquid,
[0021] The outlet of the reactor 1 is connected to the inlet of the intermediate tank 2 through a pipeline, the outlet of the intermediate tank 2 is connected to the pretreatment feed pump 3, the outlet of the pretreatment feed pump 3 is connected to the inlet of the pretreatment reactor 4, the outlet of the pretreatment reactor 4 is connected to the inlet of one side of the dealdehyde reactor 5, the outlet of the dealdehyde reactor 5 is connected to the inlet of one side of the upper part of the distillation tower 6, the top of the distillation tower 6 is connected to the inlet of the top condenser 7, the outlet of the top condenser 7 is connected to the inlet of the reflux tank 8, the outlet of the reflux tank 8 is connected to the inlet of the reflux pump 9, the outlet of the reflux pump 9 is connected to the inlet on the other side of the upper part of the distillation tower 6, the outlet of the distillation tower 6 is connected to the inlet of the tower bottom liquid pump 10, the outlet of the tower bottom liquid pump 10 is respectively connected to the inlet of the dealdehyde condenser 11 and the dilution kettle 12, and the outlet of the dealdehyde condenser 11 is connected to the inlet on the other side of the dealdehyde reactor 5.
[0022] Embodiment 1:
[0023] like Figure 1 As shown, during the reaction, after the formaldehyde material body reacts qualified in the reactor 1, it is cooled to 20-25°C and placed in the reaction liquid intermediate tank 2, and enters the neutralization reactor 4 through the pretreatment feed pump 3 for neutralization reaction until the pH value reaches 7 for extraction, and flows into the dealdehyde reactor 5 equipped with a catalyst by gravity, and the catalytic reaction is carried out to convert the formaldehyde into methylal, the reaction temperature is 20-25°C, and then enters the upper part of the distillation tower 6 for distillation, and the methylal evaporated from the top of the tower passes through the top condenser 7 into the reflux tank 8, and is refluxed and extracted at a certain reflux ratio by the reflux pump 9. A portion of the bottom liquid of the distillation tower 6 passes through the bottom liquid pump 10 at a certain reflux ratio and is refluxed through the formaldehyde removal condenser 11 into the formaldehyde removal reactor 5 for further reaction, and a portion is extracted and enters the dilution reactor 12 for subsequent use as raw materials. The device has a reasonable structure, simple operation, and low production cost. The reactor jacket is equipped with hot water and circulating water, which is convenient for controlling the temperature of the reactor. The pretreatment reactor 4 and the formaldehyde removal reactor 5 can be continuously fed and discharged. The operation is simple and material leakage can be avoided. The bottom liquid of the distillation tower 6 is refluxed and circulated for formaldehyde removal to meet the requirements. If the indicators are not met, it can be stopped from being extracted until it is qualified.
[0024] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the utility model involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also includes other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical scheme.
Claims
1. A production device for removing formaldehyde from an alkylation reaction liquid, comprising a reaction kettle (1), characterized in that: The outlet of the reactor is connected to the inlet of the intermediate tank (2) via a pipeline, the outlet of the intermediate tank (2) is connected to the pretreatment feed pump (3), the outlet of the pretreatment feed pump (3) is connected to the inlet of the pretreatment reactor (4), the outlet of the pretreatment reactor (4) is connected to the inlet of one side of the dealdehyde reactor (5), the outlet of the dealdehyde reactor (5) is connected to the inlet of one side of the upper part of the distillation tower (6), the top of the distillation tower (6) is connected to the inlet of the tower top condenser (7), and the tower top condenser The outlet of the device (7) is connected to the inlet of the reflux tank (8), the outlet of the reflux tank (8) is connected to the inlet of the reflux pump (9), the outlet of the reflux pump (9) is connected to the inlet of the other side of the upper part of the distillation tower (6), the outlet of the distillation tower (6) is connected to the inlet of the tower bottom liquid pump (10), the outlet of the tower bottom liquid pump (10) is respectively connected to the inlet of the dealdehyde condenser (11) and the dilution tank (12), and the outlet of the dealdehyde condenser (11) is connected to the inlet of the other side of the dealdehyde reaction tank (5).
2. The production device for removing formaldehyde from alkylation reaction liquid according to claim 1, characterized in that: The inner jacket of the reactor (1) is provided with hot water and circulating water.
3. The production device for removing formaldehyde from alkylation reaction liquid according to claim 1, characterized in that: The pretreatment kettle (4) and the dealdehyde reaction kettle (5) can continuously load and discharge materials.
4. The production device for removing formaldehyde from alkylation reaction liquid according to claim 1, characterized in that: The pretreatment kettle (4) is an enameled kettle, and its internal accessories and agitator are also enameled.