CN202201846U - Tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production - Google Patents
Tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production Download PDFInfo
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- CN202201846U CN202201846U CN2011202552906U CN201120255290U CN202201846U CN 202201846 U CN202201846 U CN 202201846U CN 2011202552906 U CN2011202552906 U CN 2011202552906U CN 201120255290 U CN201120255290 U CN 201120255290U CN 202201846 U CN202201846 U CN 202201846U
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Abstract
A tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production relates to a compound production device, in particular to a production device for producing 1,8-dinitronaphthalene-3,6-disulfonic acid from naphthtalene-2,7-disulfonic acid through a continuous nitration reaction in a tubular reactor in the presence of mixed acids containing nitric acid and sulfuric acid; with this device, the channelized continuous production of the nitration reaction of naphthtalene-2,7-disulfonic acid is realized; the reaction temperature ranges from 35 to 120 degrees centigrade; and the reaction time is 120 minutes. The device of the utility model is high in production process safety, low in raw material consumption, good in quality of product, and high in production capacity.
Description
Technical field
The utility model relates to a kind of production equipment of compound, and what be specifically related to is the naphthalene-2 in the H acid preparation process, and the 7-disulfonic acid makes 1 through nitration reaction, 8-schneiderite-3, the production equipment of 6-disulfonic acid.
Background technology
The main method that conventional dyes midbody H acid is produced be sulfonation reaction make carry out after three sulfonation mixture nitrated; With the ammoniacal liquor neutralization, use iron powder reducing nitre level T sour that amino T is sour, the acid out after-filtration after the denitration; Filter cake making beating neutralization; Add the dehydration of sheet alkali, the intensification alkali fusion, acid out is emitted sulfurous gas and is separated out H acid again; Someone proposes new H acid synthetic route: naphthalene and sulfuric acid are carried out sulfonation reaction make naphthalene-2,7-disulfonic acid, naphthalene-2; The 7-disulfonic acid carries out nitration reaction, nitration product 1,8-schneiderite-3; The 6-disulfonic acid neutralizes again with alkali, and shortening gets 1; 8-schneiderite-3,6-sodium disulfonate salts solution, the acid hydrolysis acid out gets the single sodium salt of H acid again.
In above-mentioned two kinds of methods, first method produces a large amount of sulfurous gas and inorganic salt and iron mud waste residue.Second method does not have three sulfonation, no alkali fusion, and the sulphur trioxide and the inorganic salt of generation are few, the secondary environmental pollution that hydrogenating reduction iron-free mud waste residue causes.
Two kinds of methods all have nitration reaction; Used technology is the still formula and drips rhythmic reaction, and the still formula is nitration reaction technology long reaction time intermittently, and production efficiency is low; Material is at temperature in the kettle skewness, uneven, the residence time skewness of concentration distribution; Local superheating causes by product many in the still, and poor product quality, yield is low, production cost is high, the production process poor stability.
It is thus clear that it is very significant that a kind of nitrated production equipment novel, efficient, production process safety is provided.
Summary of the invention
The utility model provides the naphthalene-2 in a kind of H acid production, and the 7-disulfonic acid makes 1 through nitration reaction, 8-schneiderite-3; The production equipment of 6-disulfonic acid; This device makes naphthalene-2, and 7-disulfonic acid production process has realized the canalization continuous production, and production efficiency is high; Good product quality has been realized the purpose that production process is safe and reliable.
The technical scheme of the utility model is:
Naphthalene-2 during H acid is produced; 7-disulfonic acid tubular type continuous nitrification device; This device comprises molten naphthalene still, nitration mixture jar, tubular type continuous nitrification reactor drum, connection line and the annex that matches with it; It is characterized in that, be connected with pipeline between said molten naphthalene still, nitration mixture jar and the tubular type continuous nitrification reactor drum, constitute the space that supplies Flow of Goods and Materials in it.Tubular type continuous nitrification reactor drum separate unit or multi-platform combined use, but series, parallel is installed setting.
Naphthalene-2 during described H acid is produced, 7-disulfonic acid tubular type continuous nitrification device, said tubular type continuous nitrification reactor drum are blank pipe, chemical filler are set in pipe or in pipe, the hybrid element that convection cell plays perturbation action are set; Tubular type continuous nitrification reactor drum peripheral hardware heat exchange jacket.
The utlity model has following advantage:
1. the utility model makes naphthalene-2, and the 7-disulfonic acid produces 1 through nitration reaction, 8-schneiderite-3, and the 6-disulfonic acid has been realized the canalization continuous production.
2. the material of participating in reaction gets into tubular reactor in proportion; Can realize rapidly radially mixing and do not have axial backmixing; The residence time is evenly distributed in tubular reactor, has overcome uneven, uneven, the temperature distributing disproportionation of concentration distribution of traditional still formula dropwise reaction material residence time in reactor drum, drips the shortcoming of position local superheating; Good product quality, by product is few.
3. the tubular reactor heat transfer area is big, and heat transfer efficiency is high, can in time shift out reaction heat.
4. traditional still formula drips intermittently nitrated compared with techniques, and tubular type continuous nitrification technology speed of response is fast, and throughput is big.
5. the naphthalene-2 that proposes of the utility model, 7-disulfonic acid production equipment also is adapted to intermittently nitration reaction.
Description of drawings
Fig. 1 is a naphthalene-2 in being produced by the H acid that molten naphthalene still, nitration mixture jar, tubular type continuous nitrification reactor drum and connection line constitute, 7-disulfonic acid tubular type continuous nitrification process flow sheet;
Fig. 2 is the right-hand(ed)screw sheet synoptic diagram that is provided with in the tubular type continuous nitrification reactor drum;
Fig. 3 is the left-handed flight synoptic diagram that is provided with in the tubular type continuous nitrification reactor drum.
Embodiment
Embodiment one
Naphthalene-2 during H acid is produced, 7-disulfonic acid tubular type continuous nitrification device comprise molten naphthalene still 1, nitration mixture jar 2, tubular type continuous nitrification reactor drum 3, connection line and the various annex that matches with it; The hybrid element that sets firmly in tubular type continuous nitrification reactor drum 3 straight tubes is end to end right-hand(ed)screw sheet (see figure 2) and left-handed flight (see figure 3), and 4 tubular type continuous nitrification reactor drum 3 series connection are used.
Embodiment two
Embodiment two is in the tubular type continuous nitrification reactor drum 3 the chemical filler Raschig ring to be housed with embodiment one difference.
Embodiment three
Embodiment three is that with embodiment one difference tubular type continuous nitrification reactor drum 3 is commercially available SV type static mixer.
Claims (2)
- The naphthalene-2 during 1.H acid is produced; 7-disulfonic acid tubular type continuous nitrification device; This device comprises molten naphthalene still, nitration mixture jar, tubular type continuous nitrification reactor drum, connection line and the annex that matches with it; It is characterized in that, be connected with pipeline between said molten naphthalene still (1), nitration mixture jar (2) and the tubular type continuous nitrification reactor drum (3); Tubular type continuous nitrification reactor drum (3) separate unit or many SP installings.
- 2. the naphthalene-2 during H acid according to claim 1 is produced; 7-disulfonic acid tubular type continuous nitrification device; It is characterized in that said tubular type continuous nitrification reactor drum (3) is blank pipe, chemical filler is set or in pipe, the hybrid element that convection cell plays perturbation action is set in pipe; Tubular type continuous nitrification reactor drum (3) peripheral hardware heat exchange jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202552906U CN202201846U (en) | 2011-07-19 | 2011-07-19 | Tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202552906U CN202201846U (en) | 2011-07-19 | 2011-07-19 | Tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202201846U true CN202201846U (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202552906U Expired - Lifetime CN202201846U (en) | 2011-07-19 | 2011-07-19 | Tubular continuous naphthtalene-2,7-disulfonic acid nitrifying device in H acid production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202201846U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105566171A (en) * | 2016-02-29 | 2016-05-11 | 江苏吉华化工有限公司 | Device for preparing H-acid |
| CN111533914A (en) * | 2020-04-13 | 2020-08-14 | 浙江衢州正邦有机硅有限公司 | Continuous production process of polymethyltriethoxysilane in pipeline mode |
| CN113694858A (en) * | 2020-05-26 | 2021-11-26 | 唐山金坤化工有限公司 | Continuous nitration reaction device and method for benzene ring nitration |
-
2011
- 2011-07-19 CN CN2011202552906U patent/CN202201846U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105566171A (en) * | 2016-02-29 | 2016-05-11 | 江苏吉华化工有限公司 | Device for preparing H-acid |
| CN111533914A (en) * | 2020-04-13 | 2020-08-14 | 浙江衢州正邦有机硅有限公司 | Continuous production process of polymethyltriethoxysilane in pipeline mode |
| CN113694858A (en) * | 2020-05-26 | 2021-11-26 | 唐山金坤化工有限公司 | Continuous nitration reaction device and method for benzene ring nitration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120425 |