CN106748678A - The process unit and method of a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production - Google Patents
The process unit and method of a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production Download PDFInfo
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- CN106748678A CN106748678A CN201710009657.8A CN201710009657A CN106748678A CN 106748678 A CN106748678 A CN 106748678A CN 201710009657 A CN201710009657 A CN 201710009657A CN 106748678 A CN106748678 A CN 106748678A
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- Prior art keywords
- formaldehyde
- dimethyl ether
- polymethoxy dimethyl
- production
- gaseous
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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
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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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
Abstract
The invention discloses a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether joint production, including the methyl alcohol oxidation unit, formaldehyde absorption unit, formaldehyde extraction cells, formaldehyde resolution unit and the polymethoxy dimethyl ether reaction member that are sequentially connected, wherein：Absorbent pipeline is provided with the formaldehyde absorption unit, the formaldehyde resolution unit is provided with absorbent outlet and formaldehyde outlet, and the absorbent outlet accesses absorbent pipeline, and the formaldehyde outlet is connected with polymethoxy dimethyl ether reaction member.The present invention gets up concentrated formaldehyde technique high is produced with polymethoxy dimethyl ether process matching, and used isooctanol as absorbent and extractant, and the absorption efficiency of formaldehyde is improve, reduce industrial water amount, the wastewater flow rate for producing whole system declines to a great extent, to more environment-friendly.
Description
Technical field
The invention belongs to chemical production technology and equipment technical field, formaldehyde and gaseous formaldehyde method polymethoxy are related generally to
The technique and device of dimethyl ether Joint 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, the invention provides a kind of highly concentrated Formaldehyde Production and gas phase
The process unit and method of formaldehyde method polymethoxy dimethyl ether Joint Production, are introduced into isooctanol as absorbent in absorption tower,
Because isooctanol and formaldehyde react into hemiacetal, oxymethylene polymerization is solved the problems, such as, and the absorption effect of formaldehyde greatly improved
Rate.In polymethoxy dimethyl ether production process, isooctanol is recycled but also as the extractant of formaldehyde, improves resource profit
With rate, production cost is reduced, reduce the waste water yield of whole system, it is environmentally friendly.
Technical scheme：For achieving the above object, the present invention uses following technical scheme：A kind of highly concentrated Formaldehyde Production with
Gaseous formaldehyde method polymethoxy dimethyl ether joint production, including be sequentially connected methyl alcohol oxidation unit, formaldehyde absorption unit,
Formaldehyde extraction cells, formaldehyde resolution unit and polymethoxy dimethyl ether reaction member, wherein：
Absorbent pipeline is provided with the formaldehyde absorption unit, the formaldehyde resolution unit is provided with absorbent outlet and formaldehyde
Outlet, the absorbent outlet accesses absorbent pipeline, and the formaldehyde outlet is connected with polymethoxy dimethyl ether reaction member.
Preferably, the absorbent that the absorption tower is selected is isooctanol.
Preferably, the formaldehyde absorption unit is two absorption towers of series operation.
Preferably, also including being connected to the DMMn refining plants after polymethoxy dimethyl ether reaction member.
Present invention also offers a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether combined producing process
Method, mainly includes the following steps that：
Step one, with fresh methanol as raw material, generation formaldehyde gas is reacted in methyl alcohol oxidation unit, and by formaldehyde gas
Formaldehyde absorption unit is passed through, absorption obtains formaldehyde mixed solution；
The formaldehyde mixed solution feeding formaldehyde extraction cells obtained in step 2, step one are layered, and upper strata is formaldehyde
With the extraction phase of isooctanol, lower floor is dilute formalin, and the extraction phase of the formaldehyde and isooctanol is sent into formaldehyde resolution unit,
Parse gaseous formaldehyde and isooctanol；
Step 3, by step 2 gaseous formaldehyde introduce polymethoxy dimethyl ether reaction member, and introduce dimethoxym ethane with
Gaseous formaldehyde reaction generation polymethoxy dimethyl ether.
Preferably, the formaldehyde gas concentration that generation is reacted in step one is 37~55%.
Preferably, the dilute formalin concentration described in step 2 is 10~40%.
Beneficial effect：Compared with prior art, the present invention has advantages below：It is high during using isooctanol as absorbent
The absorption efficiency of formaldehyde, solves the problems, such as oxymethylene polymerization in the case of anhydrous, reduces the water consumption of whole technique, reduces
Wastewater treatment difficulty, whole process structure is simple, and production efficiency is high, energy-conserving and environment-protective.
Brief description of the drawings
Fig. 1 is that highly concentrated Formaldehyde Production of the present invention is filled with the technique of gaseous formaldehyde method polymethoxy dimethyl ether Joint Production
The structural representation put.
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, a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether joint production, including
Methyl alcohol oxidation unit, formaldehyde absorption unit, formaldehyde extraction cells, formaldehyde resolution unit and the polymethoxy dimethyl ether being sequentially connected
Reaction member, wherein：
Absorbent pipeline is provided with the formaldehyde absorption unit, the formaldehyde resolution unit is provided with absorbent outlet and formaldehyde
Outlet, the absorbent outlet accesses absorbent pipeline, and the formaldehyde outlet is connected with polymethoxy dimethyl ether reaction member.Its
Production process is：With fresh methanol as raw material, generation formaldehyde gas (concentration is 50%) is reacted in methyl alcohol oxidation unit, and will
Formaldehyde gas is passed through formaldehyde absorption unit, and absorption obtains formaldehyde mixed solution, and formaldehyde and isooctanol are now contained in mixed solution；
The formaldehyde mixed solution feeding formaldehyde extraction cells that will be obtained are layered, and upper strata is the extraction phase of formaldehyde and isooctanol, lower floor
It is dilute formalin, the extraction phase of the formaldehyde and isooctanol is sent into formaldehyde resolution unit, parses gaseous formaldehyde and different pungent
Alcohol, now the concentration of gaseous formaldehyde is 90%；The gaseous formaldehyde that will be obtained introduces polymethoxy dimethyl ether reaction member, and introduces
Dimethoxym ethane and gaseous formaldehyde reaction generation polymethoxy dimethyl ether.The concentration of each material of the present invention uses mass percent.
In this implementation, the formaldehyde absorption unit is two absorption towers of series operation, and in actual production, one individually
Absorption tower absorption efficiency it is not high, two absorption towers can make full use of absorbent, improve the absorption efficiency of formaldehyde so that
Improve product quality.
The dilute formaldehyde of a small amount of accessory substance is also created in formaldehyde extraction cells, can as production dimethoxym ethane raw material or
As being sold outside formaldehyde or be fabricated to other products, due to using isooctanol to replace soft water as absorbent so that dilute formaldehyde contains
Water is relatively low, and distilling consumed quantity of steam when making other products as raw material using dilute formaldehyde can significantly reduce, and reduce production
Required energy consumption.
For improve product quality, the present embodiment has installed the refined dresses of DMMn additional after polymethoxy dimethyl ether reaction member
Put, can need to carry out deep processing to polymethoxy dimethyl ether according to production.
In polymethoxy dimethyl ether production process of the invention, concentrated formaldehyde technique high and polymethoxy two will be mainly produced
Methyl ether process matching gets up so that the concentration for once producing formaldehyde is greatly improved, and has used isooctanol as absorbent and extraction
Agent is taken, the absorption efficiency of formaldehyde is improve, industrial water amount is reduced, the yield of dilute formaldehyde is reduced.It is original using methyl alcohol
The technical maturity of material production concentrated formaldehyde high, product quality stabilization, with the production of polymethoxy dimethyl ether process matching, the larger reduction of energy
The cost of polymethoxy dimethyl ether, while isooctanol is recycled, it is to avoid water resource waste, the wastewater flow rate that system is produced is big
Width declines, to more environment-friendly.
Claims (7)
1. a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether joint production, it is characterised in that：Including
Methyl alcohol oxidation unit, formaldehyde absorption unit, formaldehyde extraction cells, formaldehyde resolution unit and the polymethoxy dimethyl ether being sequentially connected
Reaction member, wherein：
Absorbent pipeline is provided with the formaldehyde absorption unit, the formaldehyde resolution unit is provided with absorbent outlet and formaldehyde goes out
Mouthful, the absorbent outlet accesses absorbent pipeline, and the formaldehyde outlet is connected with polymethoxy dimethyl ether reaction member.
2. a kind of highly concentrated Formaldehyde Production according to claim 1 is filled with gaseous formaldehyde method polymethoxy dimethyl ether Joint Production
Put, it is characterised in that：The absorbent that the formaldehyde absorption unit is selected is isooctanol.
3. a kind of highly concentrated Formaldehyde Production according to claim 1 is filled with gaseous formaldehyde method polymethoxy dimethyl ether Joint Production
Put, it is characterised in that：The formaldehyde absorption unit is two absorption towers of series operation.
4. a kind of highly concentrated Formaldehyde Production according to claim 1 is filled with gaseous formaldehyde method polymethoxy dimethyl ether Joint Production
Put, it is characterised in that：Also include being connected to the DMMn refining plants after polymethoxy dimethyl ether reaction member.
5. a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether combined producing process method, it is characterised in that bag
Include following steps：
Step one, with fresh methanol as raw material, generation formaldehyde gas is reacted in methyl alcohol oxidation unit, and formaldehyde gas is passed through
Formaldehyde absorption unit, absorption obtains formaldehyde mixed solution；
Obtained in step 2, step one formaldehyde mixed solution feeding formaldehyde extraction cells be layered, upper strata be formaldehyde with it is different
The extraction phase of octanol, lower floor is dilute formalin, and the extraction phase of the formaldehyde and isooctanol is sent into formaldehyde resolution unit, parsing
Go out gaseous formaldehyde and isooctanol；
Step 3, the gaseous formaldehyde in step 2 is introduced into polymethoxy dimethyl ether reaction member, and introduce dimethoxym ethane and gaseous state
Formaldehyde reaction generation polymethoxy dimethyl ether.
6. a kind of highly concentrated Formaldehyde Production according to claim 5 and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production work
Process, it is characterised in that：The formaldehyde gas concentration that generation is reacted in step one is 37~55%.
7. a kind of highly concentrated Formaldehyde Production according to claim 5 and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production work
Process, it is characterised in that：Dilute formalin concentration described in step 2 is 10~40%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710009657.8A CN106748678A (en) | 2017-01-06 | 2017-01-06 | The process unit and method of a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production |
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| CN201710009657.8A CN106748678A (en) | 2017-01-06 | 2017-01-06 | The process unit and method of a kind of highly concentrated Formaldehyde Production and gaseous formaldehyde method polymethoxy dimethyl ether Joint Production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107266296A (en) * | 2017-07-13 | 2017-10-20 | 湖北三里枫香科技有限公司 | A kind of alkyl polyoxyether PODEn production technology device and method |
| CN107337600A (en) * | 2017-07-04 | 2017-11-10 | 湖北三里枫香科技有限公司 | A kind of method and process unit of methanol and methyl acetate production methyl methacrylate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058940A (en) * | 2014-06-30 | 2014-09-24 | 西安市尚华科技开发有限责任公司 | Method for synthesizing PODE through condensation, oxidation, polycondensation and etherification of methyl alcohol |
| CN104817440A (en) * | 2015-05-14 | 2015-08-05 | 江苏凯茂石化科技有限公司 | Process unit and method for absorbing formaldehyde in polymethoxy dimethyl ether synthesis |
-
2017
- 2017-01-06 CN CN201710009657.8A patent/CN106748678A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058940A (en) * | 2014-06-30 | 2014-09-24 | 西安市尚华科技开发有限责任公司 | Method for synthesizing PODE through condensation, oxidation, polycondensation and etherification of methyl alcohol |
| CN104817440A (en) * | 2015-05-14 | 2015-08-05 | 江苏凯茂石化科技有限公司 | Process unit and method for absorbing formaldehyde in polymethoxy dimethyl ether synthesis |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337600A (en) * | 2017-07-04 | 2017-11-10 | 湖北三里枫香科技有限公司 | A kind of method and process unit of methanol and methyl acetate production methyl methacrylate |
| CN107266296A (en) * | 2017-07-13 | 2017-10-20 | 湖北三里枫香科技有限公司 | A kind of alkyl polyoxyether PODEn production technology device and method |
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Effective date of registration: 20190319 Address after: 214000 Xiuxi Road, Binhu District, Wuxi City, Jiangsu Province, 58-50 Applicant after: Wuxi Yimao International Trade Co.,Ltd. Address before: Building 50, Henghua Science Park, 58 Xiuxi Road, Binhu District, Wuxi City, Jiangsu Province, 214000 Applicant before: JIANGSU KAIMAO CHEMICAL TECHNOLOGY Co.,Ltd. |
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Application publication date: 20170531 |