CN204275534U - A kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance - Google Patents
A kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance Download PDFInfo
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- CN204275534U CN204275534U CN201420486378.2U CN201420486378U CN204275534U CN 204275534 U CN204275534 U CN 204275534U CN 201420486378 U CN201420486378 U CN 201420486378U CN 204275534 U CN204275534 U CN 204275534U
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Abstract
The utility model discloses a kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance, this equipment comprises lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower, the tower top of described lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower is all connected with condenser and return tank in turn by pipeline, and be communicated with to be formed with tower top by reflux pump and reflux, the bottom of each tower is equipped with reboiler simultaneously; The bottom of described lightness-removing column is provided with discharge nozzle and is connected with eparating methanol tower by discharging pump; The bottom of described eparating methanol tower is also provided with discharge nozzle and is connected with methanol eddy tower feeding mouth by discharging pump, and the outlet of the reflux pump of tower top is provided with arm, and is connected with pressurizing tower feeding mouth; The bottom of described pressurizing tower and methanol eddy tower is equipped with products export.Dimethoxym ethane in the utility model effective refine and reclaim glyphosate accessory substance, reduces waste discharge and environmental pollution, and improves productivity effect and greatly improve glyphosate accessory substance added value, turn waste into wealth.
Description
Technical field
The utility model belongs to chemical production technology and equipment technical field, relates generally to the process for purification of dimethoxym ethane in the accessory substance of producing glyphosate by using glycine.
Background technology
Glyphosate is a kind of broad spectrum organic phosphorus herbicide, be after a kind of bud in inhales, conduct, go out raw nonselective herbicide, has excellent biological nature, other kind herbicide current cannot replace.The prevailing technology that current China produces glyphosate is glycine method (dialkyl phosphite method), is take glycine as initiation material, with paraformaldehyde, dimethylphosphite through addition, condensation, hydrolysis and glyphosate.Solvent methanol, in paraformaldehyde depolymehzation process, can generate dimethoxym ethane, mother liquor concentrations technique, and reclaim in the process of methyl alcohol, glyphosate per ton is recyclable about 0.45 ton of dimethoxym ethane simultaneously.Dimethoxym ethane is as glyphosate production by-product, and its amount is very considerable, and at present, this by-product is sold as general merchandise by manufacturer.Dimethoxym ethane content, about 85%, is only made the occasions few in number such as solvent for paint, as being used for the higher industry of requirement, then will being had rectification process, improve content further.
Dimethoxym ethane is colourless transparent liquid, and have the smell of similar chloroform, boiling point is low, have excellent dissolubility, with aqueous phase dissolubility good.It is the novel solvent of State Environmental Protection Administration's recommendation.Concrete physical and chemical parameter is as follows: molecular formula CH2 (OCH3) 2 molecular weight: 76.09, boiling point: 42.3 DEG C, flash-point-17.8 DEG C, density d 15/15.0.866; D20/20.0.861, self-ignition point 237 DEG C, fusing point-104.8 DEG C, more stable to alkali, when heating together with watery hydrochloric acid, easily resolve into formaldehyde and methyl alcohol.Miscible with ether, propyl alcohol, ketone etc.; Energy dissolving resin and oils, solvability is stronger than ether, acetone; The high nitrocellulose of nitrogen content can be dissolved with the azeotropic mixture of methyl alcohol; In water, 32.3% (WT) is dissolved when 16 DEG C; Water dissolves 4.3% (WT) in dimethoxym ethane.
The technique of traditional production dimethoxym ethane, adopt under under the concentrated sulfuric acid or acid resin catalyst catalysis, methanol solution and formalin carry out reactive distillation or intermittent reaction in synthetic tower, because methyl alcohol during reaction is liquid, reaction product dimethoxym ethane and methyl alcohol easily generate common solution, solution is not easily separated from dimethoxym ethane altogether, thus affects the quality of product dimethoxym ethane.Unreacted methanol solution is directly discharged, cause the waste of material and in waste water methanol content too high, contaminated environment.
Summary of the invention
Goal of the invention: for above-mentioned Problems existing and defect, the utility model provides a kind of dimethoxym ethane process for refining Apparatus and method for of producing glyphosate by using glycine accessory substance, dimethoxym ethane in effective refine and reclaim glyphosate accessory substance, reduce waste discharge and environmental pollution, and improve productivity effect.
Technical scheme: for achieving the above object, the utility model is by the following technical solutions: a kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance, comprise lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower, the tower top of described lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower is all connected with condenser and return tank in turn by pipeline, and be communicated with to be formed with tower top by reflux pump and reflux, the bottom of each tower is equipped with reboiler simultaneously; The bottom of described lightness-removing column is provided with discharge nozzle and is connected with eparating methanol tower by discharging pump; The bottom of described eparating methanol tower is also provided with discharge nozzle and is connected with methanol eddy tower feeding mouth by discharging pump, and the outlet of the reflux pump of tower top is provided with arm, and is connected with pressurizing tower feeding mouth; The bottom of described pressurizing tower and methanol eddy tower is equipped with products export.
The condenser that described pressurizing tower top connects is the reboiler be located at bottom eparating methanol tower.
Be provided with two reboilers bottom described eparating methanol tower, one of them reboiler is independent reboiler, and another reboiler thermal source is from pressurizing tower top gas.
Further improvement, described pressurizing tower overhead streams goes out gas phase after carrying out heat exchange cooling with the reboiler of eparating methanol tower tower bottom, is partly refluxed to pressurizing tower, and remainder sends into eparating methanol tower entrance.
Beneficial effect: compared with prior art, the utility model has the following advantages: reclaim the dimethoxym ethane in purification producing glyphosate by using glycine accessory substance, improve its economic benefits; The utility model energy by-product high concentration methanol, low boiling point solvent monochloro methane, dimethyl ether.The dimethoxym ethane using this invention to prepare compare market adopt methyl alcohol, formaldehyde for raw material prepare high-concentration methylal cost and energy consumption low.The utility model patent have employed the coupling of differential pressure rectified heat, utilize the heat of pressurizing tower overhead vapours as the reboiler thermal source of eparating methanol tower, greatly save heat, consumption for steam consumption and recirculated water all has larger lifting, and overhead condenser and reboiler are combined into an equipment, effectively reduce equipment cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that dimethoxym ethane described in the utility model refines production process equipment.
Wherein, lightness-removing column 1, eparating methanol tower 2, pressurizing tower 3, methanol eddy tower 4, condenser 5, return tank 6, reflux pump 7, reboiler 8.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, in the accessory substance of producing glyphosate by using glycine, main component is dimethoxym ethane and the methyl alcohol of 80 ~ 95%, and a small amount of dimethyl ether, monochloro methane, water and poly-dimethoxym ethane, it sends into lightness-removing column as raw material A after metering by pump, in lightness-removing column, carry out rectifying, lightness-removing column system comprises discharging pump at the bottom of conventional lightness-removing column, lightness-removing column top condenser, lightness-removing column return tank, lightness-removing column reflux pump, lightness-removing column reboiler and lightness-removing column.
Lightness-removing column Raw to enter lightness-removing column return tank through rectifying liquid from tower top is back to tower through a lightness-removing column reflux pump part, and another part light component (mainly containing dimethyl ether, monochloro methane etc.) is directly as product output; At the bottom of dehydrogenation tower, discharging pump delivers to eparating methanol tower unit to liquid at the bottom of lightness-removing column (mainly containing dimethoxym ethane, first alcohol and water etc.).
Eparating methanol tower system comprises conventional rectification device eparating methanol tower, two separating methanol reboiler A/B, separating methanol overhead condenser, separating methanol return tank and eparating methanol tower reflux pump.The azeotropic that separating methanol tower top obtains methyl alcohol and dimethoxym ethane forms, and by separating methanol return tank through separating methanol reflux pump, a part is back to tower, and a part enters pressurizing tower; Pressurizing tower system mainly comprises conventional rectification device pressurizing tower return tank, pressurizing tower reflux pump, pressurizing tower reboiler and the pressurizing tower condenser reboiler as eparating methanol tower, pressurization tower top obtains about 70 ~ 85% dimethoxym ethane solution by pressurizing tower return tank through pressurizing tower reflux pump, a part is back to tower, and a part enters eparating methanol tower and recycles.For finished product high-concentration methylal is sent outside bottom pressurizing tower, bottom eparating methanol tower, methyl alcohol and a small amount of heavy constituent, be pumped into 17 methanol distillation columns at the bottom of eparating methanol tower.Methanol distillation column unit comprises conventional rectification device methanol distillation column, methanol distillation column condenser, methanol distillation column return tank, methanol distillation column reflux pump, methanol distillation column reboiler, Methanol Recovery column bottoms pump, light component high concentration methanol is through methanol distillation column reflux pump, a part is back to tower, and a part is as product extraction, and heavy constituent at the bottom of tower is pumped to the external world at the bottom of 22 methanol distillation columns.
In above-mentioned technical process, control lightness-removing column tower top pressure 0.6 ~ 1.2MPa (g), eparating methanol tower tower top pressure 0 ~ 0.3MPa (g), pressurizing tower tower top pressure 0.8 ~ 1.6MPa (g), methanol distillation column tower top pressure is 0 ~ 0.3MPa (g).Towers all above all can adopt high-efficiency packing tower, in order to the plate efficiency increased under pressurized condition can lightness-removing column and pressurizing tower employing plate column.In order to effective utilization of energy, this device adopts and utilizes pressurizing tower overhead vapours as the thermal source of methanol distillation column.
The dimethoxym ethane of the utility model mainly in purification producing glyphosate by using glycine by-product dimethoxym ethane, improves its economic benefits.The utility model energy by-product high concentration methanol, low boiling point solvent monochloro methane, dimethyl ether.The dimethoxym ethane using this invention to prepare compare market adopt methyl alcohol, formaldehyde for raw material prepare high-concentration methylal cost and energy consumption low.The utility model patent have employed the coupling of differential pressure rectified heat, utilize the heat of pressurizing tower overhead vapours as the reboiler thermal source of eparating methanol tower, greatly save heat, consumption for steam consumption and recirculated water all has larger lifting, and overhead condenser and reboiler are combined into an equipment, effectively reduce equipment cost.
Claims (3)
1. the dimethoxym ethane process for refining equipment of a producing glyphosate by using glycine accessory substance, it is characterized in that: comprise lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower, the tower top of described lightness-removing column, eparating methanol tower, pressurizing tower and methanol eddy tower is all connected with condenser and return tank in turn by pipeline, and be communicated with to be formed with tower top by reflux pump and reflux, the bottom of each tower is equipped with reboiler simultaneously; The bottom of described lightness-removing column is provided with discharge nozzle and is connected with eparating methanol tower by discharging pump; The bottom of described eparating methanol tower is also provided with discharge nozzle and is connected with methanol eddy tower feeding mouth by discharging pump, and the outlet of the reflux pump of tower top is provided with arm, and is connected with pressurizing tower feeding mouth; The bottom of described pressurizing tower and methanol eddy tower is equipped with products export.
2. the dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance according to claim 1, is characterized in that: the condenser that described pressurizing tower top connects is the reboiler be located at bottom eparating methanol tower.
3. the dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance according to claim 2, it is characterized in that: bottom described eparating methanol tower, be provided with two reboilers, one of them reboiler is independent reboiler, and another reboiler thermal source is from pressurizing tower top gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420486378.2U CN204275534U (en) | 2014-08-27 | 2014-08-27 | A kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance |
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| CN201420486378.2U CN204275534U (en) | 2014-08-27 | 2014-08-27 | A kind of dimethoxym ethane process for refining equipment of producing glyphosate by using glycine accessory substance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190104A (en) * | 2014-08-27 | 2014-12-10 | 江苏凯茂石化科技有限公司 | Process equipment and method for refining dimethoxymethane in byproducts produced in production of glyphosate by glycine method |
| CN108380029A (en) * | 2018-04-20 | 2018-08-10 | 湖北泰盛化工有限公司 | A kind of alkyl esterification method glyphosate solvent recovering system and technique |
| CN110343034A (en) * | 2019-07-30 | 2019-10-18 | 安徽东至广信农化有限公司 | A kind of method of variable-pressure rectification recycling purification dimethoxym ethane |
-
2014
- 2014-08-27 CN CN201420486378.2U patent/CN204275534U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190104A (en) * | 2014-08-27 | 2014-12-10 | 江苏凯茂石化科技有限公司 | Process equipment and method for refining dimethoxymethane in byproducts produced in production of glyphosate by glycine method |
| CN108380029A (en) * | 2018-04-20 | 2018-08-10 | 湖北泰盛化工有限公司 | A kind of alkyl esterification method glyphosate solvent recovering system and technique |
| CN108380029B (en) * | 2018-04-20 | 2023-10-27 | 湖北泰盛化工有限公司 | Alkyl ester method glyphosate solvent recovery system and process |
| CN110343034A (en) * | 2019-07-30 | 2019-10-18 | 安徽东至广信农化有限公司 | A kind of method of variable-pressure rectification recycling purification dimethoxym ethane |
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Granted publication date: 20150422 Effective date of abandoning: 20171114 |
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| AV01 | Patent right actively abandoned |