CN104445068B - The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process - Google Patents
The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process Download PDFInfo
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Abstract
The invention discloses the recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process, produce isopropyl methoxalamine and need two-step process: dehydrogenating technology and hydrogenation technique, it is characterized in that, in dehydrogenating technology, propylene glycol monomethyl ether is through dehydrogenation tower, condenser and gas-liquid separator are mainly had hydrogen, other impurity have propylene glycol monomethyl ether, methoxy acetone, methane, carbon dioxide, water, carbon monoxide, the product buffered tank a obtained, compressor, water scrubber, lyophilization tower, adsorption tower, surge tank b obtains high-purity hydrogen, again the hydrogen obtained is passed through in hydrogenation reaction kettle, hydrogenation process in producing for isopropyl methoxalamine.The present invention is the by-product hydrogen in the dehydrogenating technology utilizing isopropyl methoxalamine, treated is passed through in hydrogenation technique again, this not only reduces the pollution of the environment that the discharge of hydrogen causes, reduces the cost of hydrogenation in hydrogenation technique simultaneously.
Description
Technical field
The present invention relates to hydrogen and reclaim field, the recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process.
Background technology
In the production process of existing stage isopropyl methoxalamine, need, through dehydrogenation and hydrogenation two-step process, the hydrogen produced in dehydration processes, often to process according to waste gas, enter in air, cause the pollution to environment；But in hydrogenation process, need again to add hydrogen, add again the cost producing isopropyl methoxalamine.
The most how to provide a kind of method, reducing hydrogen discharge in the production process of isopropyl methoxalamine and reducing production cost is the problem that those skilled in the art need solution badly.
Summary of the invention
In view of this, the invention provides the recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process, it is possible to reduce the pollution of environment can also be reduced production cost by the discharge of hydrogen.
For achieving the above object, the present invention provides following technical scheme:
The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process, produce isopropyl methoxalamine and need two-step process: dehydrogenating technology and hydrogenation technique, it is characterized in that, in dehydrogenating technology, propylene glycol monomethyl ether is through dehydrogenation tower, condenser and gas-liquid separator are mainly had hydrogen, other impurity have propylene glycol monomethyl ether, methoxy acetone, methane, carbon dioxide, water, carbon monoxide, the product buffered tank a obtained, compressor, water scrubber, lyophilization tower, adsorption tower, surge tank b obtains high-purity hydrogen, again the hydrogen obtained is passed through in hydrogenation reaction kettle, hydrogenation process in producing for isopropyl methoxalamine.
Preferably, in above-mentioned a kind of isopropyl methoxalamine production process in the recovery method of by-product hydrogen, the method using molecular sieve or molecular film in described adsorption tower.
Preferably, in above-mentioned a kind of isopropyl methoxalamine production process in the recovery method of by-product hydrogen, the treated hydrogen obtained can reach 0.8MPa.
The present invention is the by-product hydrogen in the dehydrogenating technology utilizing isopropyl methoxalamine, treated is passed in hydrogenation technique, this not only reduces the pollution of the environment that the discharge of hydrogen causes, reduces the cost of hydrogenation in hydrogenation technique simultaneously, have industrial value.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments of the invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 accompanying drawing is the structural representation of present invention process flow process.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
The embodiment of the invention discloses the pollution of the environment that a kind of discharge being possible not only to reduce hydrogen causes, it is also possible to reduce the method producing isopropyl methoxalamine of the cost of hydrogenation in hydrogenation technique, specifically include:
Produce isopropyl methoxalamine and need two-step process: dehydrogenating technology and hydrogenation technique, it is characterized in that, in dehydrogenating technology, propylene glycol monomethyl ether is mainly had hydrogen through dehydrogenation tower, condenser and gas-liquid separator, other impurity have propylene glycol monomethyl ether, methoxy acetone, methane, carbon dioxide, water, carbon monoxide, the product buffered tank a that obtains, compressor, water scrubber, lyophilization tower, adsorption tower, surge tank b obtain high-purity hydrogen, again the hydrogen obtained is passed through in hydrogenation reaction kettle, hydrogenation process in producing for isopropyl methoxalamine.
The present invention utilizes the by-product hydrogen in the dehydrogenating technology being isopropyl methoxalamine, treated is passed in hydrogenation technique, this not only reduces the pollution of the environment that the discharge of hydrogen causes, reduces the cost of hydrogenation in hydrogenation technique simultaneously, have industrial value.
In order to optimize technique scheme further, the method using molecular sieve or molecular film in adsorption tower, so can meet the consumption of hydrogen in hydrogenation technique.
In order to optimize technique scheme further, the treated hydrogen obtained can reach 0.8MPa, can reach the quality standard of High Purity Hydrogen, meets pressure and the requirement of purity in hydrogenation technique.
In order to optimize technique scheme further, prepare the production method that example is following:
In hydrogenation reaction kettle, add ethanolamine 500kg, methoxy acetone 600kg, catalyst 30kg, be passed through recovery hydrogen continuously, make pressure be maintained at 0.5MPa, room temperature reaction 4h, conversion ratio 99.1%.As added ethanolamine 500kg, methoxy acetone 600kg, catalyst 30kg in hydrogenation reaction kettle, being passed through raw hydrogen continuously, make pressure be maintained at 0.5MPa, room temperature reaction 4h, now conversion ratio is 99.2%.Two kinds of method gained conversion ratio approximation equivalents, the method utilizing by-product hydrogen to be recycled decreases the cost adding raw hydrogen in hydrogenation technique, decreases the discharge in an atmosphere of by-product hydrogen equally.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so describe is fairly simple, relevant part sees method part and illustrates.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.Multiple amendment to these embodiments will be apparent from for those skilled in the art, and generic principles defined herein can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (3)
1. a recovery method for by-product hydrogen in isopropyl methoxalamine production process, producing isopropyl methoxalamine needs two
Step process: dehydrogenating technology and hydrogenation technique, it is characterised in that propylene glycol monomethyl ether is through de-in dehydrogenating technology
Hydrogen tower, condenser and gas-liquid separator are mainly had hydrogen, and other impurity have propylene glycol monomethyl ether, methoxyl group
Acetone, methane, carbon dioxide, water, carbon monoxide, the product buffered tank a obtained, compressor, water
Wash tower, lyophilization tower, adsorption tower, surge tank b obtain high-purity hydrogen, then are passed through by the hydrogen obtained
In hydrogenation reaction kettle, hydrogenation process in producing for isopropyl methoxalamine.
The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process the most according to claim 1,
It is characterized in that, the method using molecular sieve or molecular film in described adsorption tower.
The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process the most according to claim 1,
It is characterized in that, the treated hydrogen obtained can reach 0.8MPa.
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| CN201410673443.7A CN104445068B (en) | 2014-11-21 | 2014-11-21 | The recovery method of by-product hydrogen in a kind of isopropyl methoxalamine production process |
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| CN104445068A CN104445068A (en) | 2015-03-25 |
| CN104445068B true CN104445068B (en) | 2016-09-28 |
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| CN109280013A (en) * | 2017-07-19 | 2019-01-29 | 山东侨昌化学有限公司 | A method of automatically switching hydrogenation source |
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| FR2250734A1 (en) * | 1973-11-09 | 1975-06-06 | Inst Francais Du Petrole | Sec alcohol dehydrogenation to ketones - in liq. phase using metallic catalysts and organo reducing agents |
| US4200451A (en) * | 1972-06-06 | 1980-04-29 | Ciba-Geigy Corporation | Plant growth regulating agent |
| CS275182B2 (en) * | 1989-01-26 | 1992-02-19 | Univ Slovenska Tech | Method of 1-methoxy-2-propanone preparation |
| CN1093700A (en) * | 1992-12-29 | 1994-10-19 | 希巴-盖吉股份公司 | The preparation method of 2-alkyl-6-methyl-N-(1 ＇-methoxyl group-2 ＇-propyl group)-aniline and their N-chloroacetanilide |
| CN101121650A (en) * | 2007-09-13 | 2008-02-13 | 复旦大学 | Method for synthesizing methoxyacetone by 1-methoxy-2-propanol gas phase oxidation dehydrogenation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006930B (en) * | 2008-04-17 | 2013-09-25 | 联合磷业有限公司 | Hydrogenation of imines |
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- 2014-11-21 CN CN201410673443.7A patent/CN104445068B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4200451A (en) * | 1972-06-06 | 1980-04-29 | Ciba-Geigy Corporation | Plant growth regulating agent |
| FR2250734A1 (en) * | 1973-11-09 | 1975-06-06 | Inst Francais Du Petrole | Sec alcohol dehydrogenation to ketones - in liq. phase using metallic catalysts and organo reducing agents |
| CS275182B2 (en) * | 1989-01-26 | 1992-02-19 | Univ Slovenska Tech | Method of 1-methoxy-2-propanone preparation |
| CN1093700A (en) * | 1992-12-29 | 1994-10-19 | 希巴-盖吉股份公司 | The preparation method of 2-alkyl-6-methyl-N-(1 ＇-methoxyl group-2 ＇-propyl group)-aniline and their N-chloroacetanilide |
| CN101121650A (en) * | 2007-09-13 | 2008-02-13 | 复旦大学 | Method for synthesizing methoxyacetone by 1-methoxy-2-propanol gas phase oxidation dehydrogenation |
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Effective date of registration: 20180103 Address after: 256600 Shandong province Binzhou City foreshore City Qin Yong Xin Road south southeast of Taiwan Patentee after: Shandong Qiao Chang Modern Agriculture Co., Ltd. Address before: 256600 Binzhou City, Shandong Province, the south side of xinyongxin Road, Binbei Office Patentee before: Qiaochang Chemical Co., Ltd., Shandong |
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