CN106748703A - Process unit and method that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde - Google Patents
Process unit and method that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde Download PDFInfo
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- CN106748703A CN106748703A CN201710009011.XA CN201710009011A CN106748703A CN 106748703 A CN106748703 A CN 106748703A CN 201710009011 A CN201710009011 A CN 201710009011A CN 106748703 A CN106748703 A CN 106748703A
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- formaldehyde
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- pure state
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- absorption
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/29—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/48—Preparation of compounds having groups
- C07C41/50—Preparation of compounds having groups by reactions producing groups
- C07C41/56—Preparation of compounds having groups by reactions producing groups by condensation of aldehydes, paraformaldehyde, or ketones
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/87—Preparation of ketenes or dimeric ketenes
- C07C45/90—Separation; Purification; Stabilisation; Use of additives
Abstract
The invention discloses a kind of highly concentrated Formaldehyde Production and the coproduction process units and method of pure state formaldehyde, including oxidation unit, absorption synthesis unit, extraction cells, resolution unit and the subsequent production unit being sequentially connected, wherein：Absorbent pipeline is provided with the absorption synthesis unit, the resolution unit is provided with absorbent loop exit and formaldehyde outlet, and the absorbent loop exit accesses absorbent pipeline, and the formaldehyde outlet is connected with subsequent production unit.Production concentrated formaldehyde technique high is matched somebody with somebody and set up by the present invention with pure state formaldehyde joint production process, and using the alcohols that carbon molecular number is 3~15 as absorbent and extractant, the reaction of formaldehyde is set to be completed with a step is absorbed, improve the absorption efficiency of formaldehyde, reduce industrial water amount, the wastewater flow rate that system is produced declines to a great extent, to more environment-friendly.
Description
Technical field
The invention belongs to chemical production technology and equipment technical field, highly concentrated Formaldehyde Production is related generally to pure state formaldehyde
The process unit and method of coproduction production.
Background technology
During current industrial production formaldehyde, soft water is added in absorption tower in order to improve absorption efficiency, due to formaldehyde
Excessive concentration meeting autohemagglutination in water, so that adding a large amount of soft water, the efficiency that profit absorbs formaldehyde in this way is relatively low, and
And the later stage needs to process substantial amounts of waste water.Formaldehyde meeting by-product after extraction step goes out substantial amounts of dilute formaldehyde, and existing process treatment is dilute
During formaldehyde, because water content is higher, being made when other products distill of dilute formaldehyde can consume more steam, considerably increase place
Reason cost, is unfavorable for continuous production.
The content of the invention
Goal of the invention：For above-mentioned problem and defect, gather the invention provides a kind of formaldehyde and gaseous formaldehyde method
The process unit and method of methoxyl group dimethyl ether Joint Production, are introduced into isooctanol as absorbent in absorption tower, due to different pungent
Alcohol reacts into hemiacetal with formaldehyde, solves the problems, such as oxymethylene polymerization, and the absorption efficiency of formaldehyde greatly improved.In poly- first
In epoxide dimethyl ether production process, isooctanol is recycled but also as the extractant of formaldehyde, improves resource utilization, is reduced
Production cost, reduces the waste water yield of whole system, environmentally friendly.
Technical scheme：For achieving the above object, the present invention uses following technical scheme：A kind of highly concentrated Formaldehyde Production with
The coproduction process units of pure state formaldehyde, including oxidation unit, absorption synthesis unit, extraction cells, the resolution unit being sequentially connected
With subsequent production unit, wherein：
Absorbent pipeline is provided with the absorption synthesis unit, the resolution unit is provided with absorbent loop exit and formaldehyde
Outlet, the absorbent loop exit accesses absorbent pipeline, and the formaldehyde outlet is connected with subsequent production unit.
Preferably, the absorbent that the absorption synthesis unit is selected is the alcohols that carbon molecular number is 3~15.
Preferably, the absorption synthesis unit is two absorption towers of series operation.
Present invention also offers a kind of coproduction technology method of highly concentrated Formaldehyde Production and pure state formaldehyde, it is main include with
Lower step：
Step one, with fresh methanol as raw material, in oxidation unit react generation formaldehyde gas；
Formaldehyde gas is simultaneously passed through formaldehyde absorption unit by step 2, and the mixed of acetal, hemiacetal and dilute formaldehyde is obtained after absorption
Close solution；
The mixed solution feeding extraction cells obtained in step 3, step 2 are layered, and upper strata is acetal and hemiacetal
Solution, lower floor is dilute formalin, and the acetal and hemiacetal solution are sent into resolution unit, parses pure state formaldehyde and alcohol
Class；
Step 4, by step 3 pure state formaldehyde introduce subsequent production unit, participate in other productions.
Preferably, the formaldehyde gas concentration that generation is reacted in step one is 55~70%.
Preferably, the dilute formalin concentration described in step 3 is 10~30%.
Beneficial effect：Compared with prior art, the present invention has advantages below：Unlike the prior art, carbon is used
Molecular number be 3~15 alcohols as absorbent, complete the preparation work of acetal and hemiacetal in absorption tower, formaldehyde high
Absorption efficiency, solves the problems, such as oxymethylene polymerization in the case of anhydrous, reduces the water consumption of whole technique, reduces at waste water
Reason difficulty, whole process structure is simple, and number of devices is few, and flow is short, and production efficiency is high, energy-conserving and environment-protective.
Brief description of the drawings
Fig. 1 is the structural representation of the process unit that highly concentrated Formaldehyde Production of the present invention is produced with the coproduction of pure state formaldehyde
Figure.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification for planting the equivalent form of value falls within the application appended claims limited range.
As shown in figure 1, the coproduction process units of a kind of highly concentrated Formaldehyde Production and pure state formaldehyde, including the oxidation being sequentially connected
Unit, absorption synthesis unit, extraction cells, resolution unit and subsequent production unit, wherein：
Absorbent pipeline is provided with the absorption synthesis unit, the resolution unit is provided with absorbent loop exit and formaldehyde
Outlet, the absorbent loop exit accesses absorbent pipeline, and the formaldehyde outlet is connected with subsequent production unit.
Its production process is：With fresh methanol as raw material, generation formaldehyde gas is reacted in oxidation unit；And by formaldehyde gas
Body is passed through formaldehyde absorption unit, and the mixed solution of acetal, hemiacetal and dilute formaldehyde is obtained after absorption；The mixed solution that will be obtained send
Enter extraction cells to be layered, upper strata is acetal and hemiacetal solution, and lower floor is dilute formalin, by the acetal and hemiacetal
Solution sends into resolution unit, parses pure state formaldehyde and alcohols；Pure state formaldehyde in step 3 is introduced into subsequent production unit, ginseng
With other productions.
The concentration of each material of the present invention uses mass percent.
In the present embodiment, the formaldehyde absorption unit is two absorption towers of series operation, in actual production, a list
The absorption efficiency on only absorption tower is not high, and two absorption towers can make full use of absorbent, improves the absorption efficiency of formaldehyde, from
And improve product quality.In conventional production process, absorbent is used water as, absorb and control the concentration of formaldehyde, prevented
Formaldehyde is polymerized because of excessive concentration, and such way needs to consume substantial amounts of water, and formaldehyde absorption is inefficient.The present embodiment with
Carbon molecular number be 3~15 alcohols as absorbent, absorption tower is improved to synthesize the synthetic tower of acetal and hemiacetal, no
The absorption work of formaldehyde is only completed, while completing the synthetic work of raw materials for production, has been needed at separation in whole reaction system
Reason water consumption is greatly decreased, and oxymethylene polymerization is solved the problems, such as again, reduces the risk of transport high-concentration formaldehyde.
The dilute formaldehyde of a small amount of accessory substance is also created in extraction cells, can be as the raw material of production dimethoxym ethane or conduct
Other products are sold or are fabricated to outside formaldehyde, due to the present embodiment in dilute formaldehyde water content it is relatively low, using dilute formaldehyde as raw material
The consumed quantity of steam of distillation can significantly reduce when making other products, reduce energy consumption needed for production.
To mainly produce concentrated formaldehyde technique high and match somebody with somebody with the coproduction production of pure state formaldehyde in the present invention and set up so that once
The concentration for producing formaldehyde is greatly improved, and is improve as absorbent and extractant using the alcohols that carbon molecular number is 3~15
The absorption efficiency of formaldehyde, reduces industrial water amount, reduces the yield of dilute formaldehyde.It is that raw material produces highly concentrated first using methyl alcohol
The technical maturity (such as silver-colored catalysis method or iron molybdenum catalysis method) of aldehyde, product quality stabilization is given birth to polymethoxy dimethyl ether process matching
Produce, can the larger cost for reducing polymethoxy dimethyl ether, while isooctanol is recycled, it is to avoid water resource waste, system
The wastewater flow rate of generation declines to a great extent, to more environment-friendly.
Claims (6)
1. the coproduction process units of a kind of highly concentrated Formaldehyde Production and pure state formaldehyde, it is characterised in that：Including the oxidation being sequentially connected
Unit, absorption synthesis unit, extraction cells, resolution unit and subsequent production unit, wherein：
Absorbent pipeline is provided with the absorption synthesis unit, the resolution unit is provided with absorbent loop exit and formaldehyde goes out
Mouthful, the absorbent loop exit accesses absorbent pipeline, and the formaldehyde outlet is connected with subsequent production unit.
2. the coproduction process units of a kind of highly concentrated Formaldehyde Production according to claim 1 and pure state formaldehyde, it is characterised in that：
The absorbent that the absorption synthesis unit is selected is the alcohols that carbon molecular number is 3~15.
3. the coproduction process units of a kind of highly concentrated Formaldehyde Production according to claim 1 and pure state formaldehyde, it is characterised in that：
The absorption synthesis unit is two absorption towers of series operation.
4. the process that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde, it is characterised in that comprise the following steps：
Step one, with fresh methanol as raw material, in oxidation unit react generation formaldehyde gas；
Formaldehyde gas is simultaneously passed through formaldehyde absorption unit by step 2, and the mixing that acetal, hemiacetal and dilute formaldehyde are obtained after absorption is molten
Liquid；
The mixed solution feeding extraction cells obtained in step 3, step 2 are layered, and upper strata is acetal and hemiacetal solution,
Lower floor is dilute formalin, and the acetal and hemiacetal solution are sent into resolution unit, parses pure state formaldehyde and alcohols；
Step 4, by step 3 pure state formaldehyde introduce subsequent production unit, participate in other productions.
5. the coproduction technology method of a kind of highly concentrated Formaldehyde Production according to claim 4 and pure state formaldehyde, its feature
It is：The formaldehyde gas concentration that generation is reacted in step one is 55~70%.
6. the coproduction technology method of a kind of highly concentrated Formaldehyde Production according to claim 4 and pure state formaldehyde, its feature
It is：Dilute formalin concentration described in step 3 is 10~30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009011.XA CN106748703A (en) | 2017-01-06 | 2017-01-06 | Process unit and method that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009011.XA CN106748703A (en) | 2017-01-06 | 2017-01-06 | Process unit and method that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde |
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| CN106748703A true CN106748703A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710009011.XA Pending CN106748703A (en) | 2017-01-06 | 2017-01-06 | Process unit and method that a kind of highly concentrated Formaldehyde Production is produced with the coproduction of pure state formaldehyde |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967014A (en) * | 1988-02-03 | 1990-10-30 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for producing formaldehyde and derivatives thereof |
| CN106256822A (en) * | 2016-09-19 | 2016-12-28 | 江苏永大化工设备有限公司 | Methanol is through condensation, oxidation, polycondensation, the method for process synthesizing triformol |
-
2017
- 2017-01-06 CN CN201710009011.XA patent/CN106748703A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967014A (en) * | 1988-02-03 | 1990-10-30 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for producing formaldehyde and derivatives thereof |
| CN106256822A (en) * | 2016-09-19 | 2016-12-28 | 江苏永大化工设备有限公司 | Methanol is through condensation, oxidation, polycondensation, the method for process synthesizing triformol |
Non-Patent Citations (1)
| Title |
|---|
| 汪多仁: "聚甲醛合成新工艺及其应用", 《沈阳化工》 * |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180828 Address after: 214000 Jinxi Road, Wuxi City, Jiangsu Province, No. 100 Applicant after: WUXI ZHIGUI TECHNOLOGY Co.,Ltd. Address before: 214000 building 50, Heng Hua Science and Technology Park, 58 embroidery Road, Binhu District, Wuxi, Wuxi, Jiangsu Applicant before: JIANGSU KAIMAO CHEMICAL TECHNOLOGY Co.,Ltd. |
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Application publication date: 20170531 |
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