CN104492345A - Discharging device and process for catalytic hydrogenation reaction - Google Patents
Discharging device and process for catalytic hydrogenation reaction Download PDFInfo
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- CN104492345A CN104492345A CN201410717271.9A CN201410717271A CN104492345A CN 104492345 A CN104492345 A CN 104492345A CN 201410717271 A CN201410717271 A CN 201410717271A CN 104492345 A CN104492345 A CN 104492345A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a discharging device and process for catalytic hydrogenation reaction. The discharging device comprises a reaction kettle, a first settling tank, and a discharging pipeline through which the reaction kettle is communicated with the first settling tank, wherein one end of the discharging pipeline, communicated with the reaction kettle is equipped with an upper discharging pipe and a lower discharging pipe which are arranged in parallel; the distance from the inlet of the upper discharging pipe to the bottom part of the reaction kettle is 10 to 50cm; an upper discharging valve is arranged on a pipeline of the upper discharging pipe; the inlet of the lower discharging pipe is closer to the bottom part of the reaction kettle; a lower discharging valve is arranged on the pipeline of the lower discharging pipe; a radar level transmitter is arranged on the reaction kettle; a densimeter is arranged on the discharging pipeline; the radar level transmitter and the densimeter are used for sending a signal of closing the valve to the upper discharging valve or the lower discharging valve according to the detection result. With the adoption of the discharging device for discharging, catalytic hydrogenation reaction solutions can be automatically continuously discharged, thus the recovery rate of a catalyst can be effectively improved, and moreover, unnecessary emission of hydrogen can be decreased.
Description
Technical field
The invention belongs to hydrogenation technical field, particularly relate to a kind of drawing mechanism for catalytic hydrogenation and discharging technology.
Background technology
Catalytic hydrogenation refers to that hydrogen molecule adds to the reaction on the unsaturated group of organic compound under the effect of catalyst.The key of catalytic hydrogenation is exactly catalyst, and wherein Raney nickel is most widely used general, has all kinds such as Raney's nickel, nickel borides.Noble metal platinum, palladium and rhodium are also comparatively conventional, and these catalyst prices all costly, in industrialization catalytic hydrogenation, all can manage to recycle it.
Catalytic hydrogenation is generally all carried out under the condition of high temperature and high pressure, how effectively to utilize the heat energy in reaction mass and the discharge capacity reducing hydrogen, also has profound significance to ERMization comprehensive utilization.
After existing catalytic hydrogenation is carried out completely, be all that directly reactant liquor is squeezed into settling tank carries out sedimentation, then removed by catalyst by filtering, catalyst can not be recycled easily, and inefficient operation, and the unit consumption of hydrogen is larger.
Summary of the invention
The invention provides a kind of drawing mechanism for catalytic hydrogenation and discharging technology, adopt this drawing mechanism can realize the Automatic continuous discharging of catalytic hydrogenation liquid, the effective rate of recovery improving catalyst, and the unnecessary discharge of hydrogen can be reduced.
For a drawing mechanism for catalytic hydrogenation, comprise reactor, a settling tank and the discharging pipeline being communicated with reactor and a settling tank, one end that described discharging pipeline is communicated with reactor is the top discharge pipe and bottom discharge pipe that are set up in parallel;
Distance bottom the import of described top discharge pipe and reactor is 10 ~ 50cm, and described top discharge pipe is provided with top discharge valve;
The import of described bottom discharge pipe is near the bottom of reactor, and described bottom discharge pipe is provided with bottom discharge valve;
Described reactor is provided with radar level gauge, and described discharging pipeline is provided with densitometer, and described radar level gauge and densitometer send the signal of valve-off to described top discharge valve or bottom discharge valve according to testing result.
In the present invention, drawing mechanism contains two discharging pipelines, can adopt different discharging technology, carry out discharging when catalyst activity is higher from top discharge pipe during discharging according to the difference of catalyst activity, can reduce catalyst and enter settling tank with material; When catalyst activity is lower, from the discharging of bottom discharge pipeline, directly catalyst is derived together with material.In discharging process, control striking point by radar level gauge and densitometer, effectively can reduce the unit consumption of hydrogen.
As preferably, the sidewall of a described settling tank is provided with top discharge mouth and lower discharge port, and the distance from bottom of described top discharge mouth and described settling tank is 30 ~ 60cm; The distance of the bottom of described lower discharge port and described settling tank is 10 ~ 30cm;
The bottom of a described settling tank is provided with catalyst discharging opening.
Wherein, when adopting top discharge pipe discharging, the catalytic amount be mingled with is few, from the lower discharge port discharging of a settling tank; When adopting bottom discharge pipe discharging, the catalytic amount be mingled with is many, needs the top discharge mouth discharging from a settling tank.
As preferably, described discharge nozzle curb the inside being tangentially communicated to a described settling tank of a settling tank.
As preferably, the position that is communicated with of described discharging pipeline and a settling tank is in middle part in a settling tank short transverse
As preferably, described discharging pipeline is provided with heat transmission equipment.Can by the cooling of the reactant liquor of higher temperature and by heat recovery and utilization by heat transmission equipment, this heat transmission equipment employing heat exchange coil.
Present invention also offers a kind of discharging technology adopting described drawing mechanism, comprise the steps:
(1) after catalytic hydrogenation completes, detect the activity of catalyst and determine whether to reuse catalyst;
(2) in step (1), need if determine to reuse catalyst, then by reactant liquor standing sedimentation 30 ~ 60min, then open top discharge valve, make reactant liquor carry out continuous discharge through top discharge pipe, enter in a settling tank;
(3) by the material sedimentation 1-8 hour that settling tank in step (2) is collected, then open the lower discharge port of a settling tank, discharging is to subsequent sedimentation tank or product-collecting tank;
(4) in step (1), do not need to reuse catalyst if determine, then directly open bottom discharge valve, make reactant liquor carry out continuous discharge through bottom discharge pipe, enter in a settling tank;
(5) by the material sedimentation 1-8 hour that settling tank in step (4) is collected, then open the top discharge mouth of a settling tank, discharging is to subsequent sedimentation tank or product-collecting tank;
(6) after the hydrogenated products discharging of step (3) or step (5), the catalyst discharging opening collection catalyst of a settling tank is opened.
As preferably, in the continuous discharge process of step (2), the top discharge valve described in during satisfied following arbitrary condition cuts out, and terminates discharging process;
Condition one, described radar level gauge gathers the liquid level in reactor, and described liquid level is reduced to predetermined value;
Condition two, the material density in described densitometer signal piping, when the changes values of material density exceeds predetermined value.
When adopting bottom discharge pipe discharging, directly liquid material and catalyst are all squeezed into a settling tank, therefore, do not need to control liquid level, as preferably, in the continuous discharge process of step (4), material density in described densitometer signal piping, when the changes values of material density exceeds predetermined value, sends shutdown signal to described top discharge valve, described top discharge valve cuts out, and terminates discharging process; When the changes values of material density does not exceed predetermined value, then do not operate.
As preferably, in the continuous discharge process of step (2) or step (4), heat transmission equipment is adopted to carry out heat exchange to material.
As preferably, in the continuous discharge process of step (2) or step (4), material tangentially enters a described settling tank along a settling tank.
Compared with the existing technology, drawing mechanism of the present invention and discharging technology effectively can improve the rate of recovery of catalyst, reduce the damaged degree of catalyst, make use of the heat energy in reaction mass simultaneously fully and reduce the unnecessary discharge of hydrogen, technological design is reasonable, and security is high.
Accompanying drawing explanation
Fig. 1 is the structure &processes flow chart of patent of the present invention;
Fig. 2 is the schematic diagram that material enters a settling tank; In figure, 1: reactor, 2: heat exchanger, 3: settling tanks, 4: heat exchange coil, 5: top discharge pipe, 6: bottom discharge pipe, 7: settling tank top discharge mouths, 8: settling tank lower discharge ports, 9: settling tank catalyst discharging openings, 10: radar level gauge, 11: densitometer, 12: reactor discharging pneumatic operated valve, 13: reactor evacuated tube, 14: settling tank evacuated tube 15: reactor discharging pipeline.
Detailed description of the invention
As shown in Figure 1, this drawing mechanism comprises for the reactor 1 of hydrogenation, discharging pipeline and a settling tank 3 for discharging drawing mechanism of the present invention from left to right successively.
Wherein, discharging pipeline 15 is followed successively by feed zone, interlude and discharging section from left to right, the one end be communicated with reactor is feed zone, be made up of the top discharge pipe 5 of parallel connection and bottom discharge pipe 6, reactor inside is stretched in one end of top discharge pipe 5 and bottom discharge pipe 6, after one end crosses in addition, be connected with the interlude of discharging pipeline 15; The interlude of discharging pipeline 15 is provided with densitometer 11 and heat exchanger 2, and the part that the interlude of discharging pipeline 15 contacts with heat exchanger forms heat exchange coil 4; The discharging section of discharging pipeline 15 is along the inside being tangentially communicated to a described settling tank of a settling tank.
Settling tank 3 is made up of the top of cylinder type and obconic bottom, and be provided with catalyst discharging opening 9 at obconic bottommost, be provided with top discharge mouth 7 and lower discharge port 8 at obconic sidewall, both are spaced a distance.
Reactor is provided with radar level gauge 10, top discharge pipe 5 and bottom discharge pipe 6 are provided with discharging pneumatic operated valve 12, respectively as top discharge valve and bottom discharge valve.In discharging process, discharging pneumatic operated valve 12 is manually opened, and the control that can be subject to radar level gauge 10 and densitometer 11 closes automatically.
Reactor is provided with various feed pipe and reactor evacuated tube 13, a settling tank has a settling tank evacuated tube 15, this part can be selected according to the needs of concrete reaction.
Upper and lower two kinds of discharge methods are set in a kettle., based on top discharge in ordinary operation, bottom discharge only in a kettle. catalyst activity obviously reduce, stop or other needs catalyst all to discharge when, just can use.
Wherein the concrete operation method of top discharge is as follows:
(1) after catalytic hydrogenation terminates, stop the stirring of reactor, allow catalyst sedimentation 30-60min in reactor, make in reactor except a small amount of catalyst suspended, major part all settles down.After sedimentation terminates, open the top discharge valve of reactor, perform top discharge program, material is in the process of discharging, and the cooling water in the coil pipe and cooler of subcooler carries out heat exchange, and the material after heat exchange enters a settling tank in the mode of sidespin.
Top discharge mouth is arranged on the middle and lower part of reactor, near the top of catalyst layer, the position of the bottom 10-50cm of general distance reactor, adopt the object of top discharge, mainly prevent catalyst in discharging process by too much discharge, rub between reduction catalyst and discharging pipeline simultaneously and cause the fragmentation of catalyst, improve the rate of recovery of catalyst.Adopt the rate of recovery of top discharge catalyst to reach more than 95% as calculated, and the rate of recovery of bottom discharge catalyst can only reach more than 80%.
Cooling water in cooler is warmed up to 45-60 DEG C by 5-30 DEG C, for material dissolution or other purposes after discharging.
After material in reactor is discharged, enter a settling tank in the mode of sidespin, the mode of sidespin can alleviate the impulsive force of material to a settling tank inwall, catalyst also can be avoided because clashing into, and occur a large amount of fragmentations.
(2) in discharging process, liquid level in reactor constantly reduces, by the change of liquid level in the radar level gauge sensitive and reactive still at reactor top, drop to a certain degree until liquid level, generally arranging liquid level is 10-50cm scope, signal is conveyed to outlet valve by radar level gauge, and outlet valve performs bolt down procedure, and reactor discharging terminates.If radar level gauge is out of control in discharging process, material in reactor can continue to discharge, when liquid level drops to top discharge mouth place, hydrogen in reactor is discharged, densitometer on discharging pipeline can determine the sharply change of material density, thus signal is conveyed to outlet valve, outlet valve performs bolt down procedure, and reactor discharging terminates.
Design radar level gauge and the whole striking point of densitometer two ore control, prevent in discharging process, hydrogen too much in reactor is discharged, and stops the waste of resource.Adopt this control technology, the discharge capacity of hydrogen can control below 5.0%, and the unit consumption of hydrogen obviously reduces, and effectively ensure that the security of whole discharging process.
(3), after material enters a settling tank, sedimentation 1-8 hour, then opens the bottom discharge valve on a settling tank, starts a sedimentation discharging pump, material is squeezed into secondary settlement tank.Open nitrogen feed valve simultaneously, in a settling tank, pour nitrogen, carry out with nitrogen the chance that isolated catalyst contacts with air, prevent catalyst oxidation inactivation.With Liquid level on a settling tank, after waiting material to beat, chain by liquid level, automatically stop a sedimentation discharging pump.Then open catalyst outlet valve, start catalyst membrane pump, catalyst is squeezed into catalyst wash tank.
At follow-up catalyst sedimentation tank, catalyst wash groove and catalyst metering groove, all adopt the mode of nitrogen pressurize, stop catalyst and contact with the direct of air, prevent catalyst oxidation inactivation, thus improve the rate of recovery of catalyst.
Wherein the method for operating of bottom discharge is as follows:
(1) after catalytic hydrogenation terminates, stop the stirring of reactor, the bottom discharge valve of direct unlatching reactor, perform bottom discharge program, in discharging process, material carries out heat exchange through the cooling water in the coil pipe and cooler of subcooler, and the material after heat exchange enters a settling tank in the mode of sidespin.
Lower discharge port is arranged on the bottom of reactor, ensures that catalyst and material can all be discharged from reactor.
Bottom discharge process, radar level gauge discord discharge valve is chain, is only judged the shut-in time of discharge valve by densitometer.
(2) in discharging process, after the solution in reactor and catalyst are all drained, hydrogen is discharged subsequently, the great variety of densitometer perception discharging process Midst density, rapidly signal is conveyed to outlet valve, after outlet valve acknowledge(ment) signal, perform bolt down procedure immediately, reactor discharging terminates.
(3), after material enters a settling tank, sedimentation 1-8 hour, then opens the top discharge valve on a settling tank, starts a sedimentation discharging pump, material is squeezed into secondary settlement tank.Open nitrogen feed valve simultaneously, in a settling tank, pour nitrogen, carry out with nitrogen the chance that isolated catalyst contacts with air, prevent catalyst oxidation inactivation.With Liquid level on a settling tank, after waiting material to beat, chain by liquid level, automatically stop a sedimentation discharging pump.Then open catalyst outlet valve, start catalyst membrane pump, catalyst is squeezed into catalyst wash tank.
Upper and lower discharging opening is set in a settling tank, corresponds respectively to the upper and lower discharging form of reactor, wherein during reactor employing top discharge, after entering a settling tank sedimentation, the discharging of corresponding employing lower discharge port; During reactor employing bottom discharge, after entering a settling tank sedimentation, the discharging of corresponding employing top discharge mouth.This design, reasonably can distribute the output quantity of material and catalyst, avoid too much catalyst to be transported to secondary settlement tank, affect the effect of secondary settlement, or too much material is transported to catalyst wash tank, cause the wasting phenomenon of material.
Below in conjunction with specific embodiment, the present invention will be further described:
Embodiment 1: the discharging technology of sorbierite catalytic hydrogenation
(1) after sorbierite catalytic hydrogenation terminates, stop the stirring of reactor, allow material in reactor and catalyst (Raney's nickel, specification is: below 200 orders, nickel content >=92.8%) sedimentation 30min, after sedimentation terminates, open the top discharge valve of reactor, carry out top discharge, in discharging process, material carries out heat exchange through the cooling water in the coil pipe and cooler of subcooler, and the material after heat exchange enters a settling tank in the mode of sidespin.
Cooling water after heat exchange is warmed up to 50 DEG C by 25 DEG C, is transported to dissolving tank by water-delivery pump, for the dissolving of glucose.
(2) in discharging process, liquid level in reactor constantly reduces, by the change of liquid level in the radar level gauge sensitive and reactive still at reactor top, bottom liquid level distance reactor during 30cm height (this is highly substantially equal to catalyst sedimentation height), signal is conveyed to outlet valve by radar level gauge, outlet valve performs bolt down procedure, and reactor discharging terminates.
(3) Sorbitol solution sedimentation 2 hours in a settling tank, then opens the top discharge valve on a settling tank, starts a sedimentation discharging pump, material is squeezed into secondary settlement tank.Open nitrogen feed valve simultaneously, in a settling tank, pour nitrogen, make settling tank be in the state of pressure-fired (0.05mp).With Liquid level on a settling tank, after waiting material to beat, chain by liquid level, automatically stop a sedimentation discharging pump.Then open catalyst outlet valve, start catalyst membrane pump, catalyst is squeezed into catalyst wash tank.
Through verification calculation, sorbierite catalytic hydrogenation adopts this discharge method, and the rate of recovery of catalyst is 95.5%, the discharge capacity of hydrogen is below 4.5%.
Embodiment 2: the discharging technology of xylitol catalytic hydrogenation
(1) after xylitol catalytic hydrogenation terminates, stop the stirring of reactor, allow material in reactor and catalyst (Raney's nickel, specification is: below 200 orders, nickel content >=92.8%) sedimentation 40min, after sedimentation terminates, open the top discharge valve of reactor, carry out top discharge, in discharging process, material carries out heat exchange through the cooling water in the coil pipe and cooler of subcooler, and the material after heat exchange enters a settling tank in the mode of sidespin.
Cooling water after heat exchange is warmed up to 55 DEG C by 25 DEG C, then with transport pump to dissolving tank, for the dissolving of wood sugar.
(2) in discharging process, liquid level in reactor constantly reduces, by the change of liquid level in the radar level gauge sensitive and reactive still at reactor top, bottom liquid level distance reactor during 25cm height (this is highly substantially equal to catalyst sedimentation height), signal is conveyed to outlet valve by radar level gauge, outlet valve performs bolt down procedure, and reactor discharging terminates.
The sedimentation 3 hours in a settling tank of xylitol liquid, then opens the top discharge valve on a settling tank, starts a sedimentation discharging pump, material is squeezed into secondary settlement tank.Open nitrogen feed valve simultaneously, in a settling tank, pour nitrogen, make settling tank be in the state of pressure-fired (0.05mp).With Liquid level on a settling tank, after waiting material to beat, chain by liquid level, automatically stop a sedimentation discharging pump.Then open catalyst outlet valve, start catalyst membrane pump, catalyst is squeezed into catalyst wash tank.
Through verification calculation, xylitol catalytic hydrogenation adopts this discharge method, and the rate of recovery of catalyst is 96.5%, the discharge capacity of hydrogen is below 4.5%.
Embodiment 3: the discharging technology of maltitol catalytic hydrogenation
(1) after maltol catalytic hydrogenation terminates, stop the stirring of reactor, allow material in reactor and catalyst (Raney's nickel, specification is: below 200 orders, nickel content >=92.8%) sedimentation 45min, after sedimentation terminates, open the top discharge valve of reactor, carry out top discharge, in discharging process, material carries out heat exchange through the cooling water in the coil pipe and cooler of subcooler, and the material after heat exchange enters a settling tank in the mode of sidespin.
Cooling water after heat exchange is warmed up to 50 DEG C by 20 DEG C, then with transport pump to dissolving tank, for the dissolving of maltose.
(2) in discharging process, liquid level in reactor constantly reduces, by the change of liquid level in the radar level gauge sensitive and reactive still at reactor top, bottom liquid level distance reactor during 25cm height (this is highly substantially equal to catalyst sedimentation height), signal is conveyed to outlet valve by radar level gauge, outlet valve performs bolt down procedure, and reactor discharging terminates.
(3) maltol liquid sedimentation 2.5 hours in a settling tank, then opens the top discharge valve on a settling tank, starts a sedimentation discharging pump, material is squeezed into secondary settlement tank.Open nitrogen feed valve simultaneously, in a settling tank, pour nitrogen, make settling tank be in the state of pressure-fired (0.05mp).With Liquid level on a settling tank, after waiting material to beat, chain by liquid level, automatically stop a sedimentation discharging pump.Then open catalyst outlet valve, start catalyst membrane pump, catalyst is squeezed into catalyst wash tank.
Through verification calculation, maltitol catalytic hydrogenation adopts this discharge method, and the rate of recovery of catalyst is 96.0%, the discharge capacity of hydrogen is below 4.5%.
Claims (9)
1. the drawing mechanism for catalytic hydrogenation, comprise reactor, a settling tank and the discharging pipeline being communicated with reactor and a settling tank, it is characterized in that, one end that described discharging pipeline is communicated with reactor is the top discharge pipe and bottom discharge pipe that are set up in parallel;
Distance bottom the import of described top discharge pipe and reactor is 10 ~ 50cm, and described top discharge pipe is provided with top discharge valve;
The import of described bottom discharge pipe is near the bottom of reactor, and described bottom discharge pipe is provided with bottom discharge valve;
Described reactor is provided with radar level gauge, and described discharging pipeline is provided with densitometer, and described radar level gauge and densitometer send the signal of valve-off to described top discharge valve or bottom discharge valve according to testing result.
2. the drawing mechanism for catalytic hydrogenation according to claim 1, is characterized in that, the sidewall of a described settling tank is provided with top discharge mouth and lower discharge port, and the distance from bottom of described top discharge mouth and described settling tank is 30 ~ 60cm; The distance of the bottom of described lower discharge port and described settling tank is 10 ~ 30cm;
The bottom of a described settling tank is provided with catalyst discharging opening.
3. the drawing mechanism for catalytic hydrogenation according to claim 1 and 2, is characterized in that, described discharge nozzle curb the inside being tangentially communicated to a described settling tank of a settling tank.
4. the drawing mechanism for catalytic hydrogenation according to claim 3, is characterized in that, the position that is communicated with of described discharging pipeline and a settling tank is in middle part in a settling tank short transverse.
5. the drawing mechanism for catalytic hydrogenation according to claim 1 and 2, is characterized in that, described discharging pipeline is provided with heat transmission equipment.
6. adopt a discharging technology for the drawing mechanism described in any one of claim 2 ~ 5, it is characterized in that, comprise the steps:
(1) after catalytic hydrogenation completes, detect the activity of catalyst and determine whether to reuse catalyst;
(2) in step (1), need if determine to reuse catalyst, then by reactant liquor standing sedimentation 30 ~ 60min, then open top discharge valve, make reactant liquor carry out continuous discharge through top discharge pipe, enter in a settling tank;
(3) by the material sedimentation 1-8 hour that settling tank in step (2) is collected, then open the lower discharge port of a settling tank, discharging is to subsequent sedimentation tank or product-collecting tank;
(4) in step (1), do not need to reuse catalyst if determine, then directly open bottom discharge valve, make reactant liquor carry out continuous discharge through bottom discharge pipe, enter in a settling tank;
(5) by the material sedimentation 1-8 hour that settling tank in step (4) is collected, then open the top discharge mouth of a settling tank, discharging is to subsequent sedimentation tank or product-collecting tank;
(6) after the hydrogenated products discharging of step (3) or step (5), the catalyst discharging opening collection catalyst of a settling tank is opened.
7. discharging technology according to claim 6, is characterized in that, in the continuous discharge process of step (2), the top discharge valve described in during satisfied following arbitrary condition cuts out, and terminates discharging process;
Condition one, described radar level gauge gathers the liquid level in reactor, and described liquid level is reduced to predetermined value;
Condition two, the material density in described densitometer signal piping, when the changes values of material density exceeds predetermined value.
8. discharging technology according to claim 6, it is characterized in that, in the continuous discharge process of step (4), material density in described densitometer signal piping, when the changes values of material density exceeds predetermined value, send shutdown signal to described top discharge valve, described top discharge valve cuts out, and terminates discharging process.
9. discharging technology according to claim 6, is characterized in that, in the continuous discharge process of step (2) or step (4), adopts heat transmission equipment to carry out cooling heat exchange to material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410717271.9A CN104492345B (en) | 2014-12-01 | 2014-12-01 | A kind of drawing mechanism for catalytic hydrogenation and discharging technology |
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| CN201410717271.9A CN104492345B (en) | 2014-12-01 | 2014-12-01 | A kind of drawing mechanism for catalytic hydrogenation and discharging technology |
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| CN104492345B CN104492345B (en) | 2016-08-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512864A (en) * | 2016-12-29 | 2017-03-22 | 杭州油脂化工有限公司 | Intermittent hydrogenation safety discharging device and safety discharging method |
| CN112882168A (en) * | 2021-01-28 | 2021-06-01 | 通鼎互联信息股份有限公司 | Oil supply system for filling ointment of central reinforcement of high-reliability optical cable |
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| CN101851150A (en) * | 2010-03-30 | 2010-10-06 | 山东福田药业有限公司 | Novel sugar alcohol hydrogenation technology |
| CN203437105U (en) * | 2013-08-27 | 2014-02-19 | 山东道可化学有限公司 | Gas backflushing type alkali liquor reaction device |
| CN203778037U (en) * | 2014-03-06 | 2014-08-20 | 江苏格罗瑞化学有限公司 | Compression and discharge device of triazinone oxidation reaction kettle |
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2014
- 2014-12-01 CN CN201410717271.9A patent/CN104492345B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11286457A (en) * | 1997-12-26 | 1999-10-19 | Koei Chem Co Ltd | Continuous catalytic reduction of organic compound |
| CN101851150A (en) * | 2010-03-30 | 2010-10-06 | 山东福田药业有限公司 | Novel sugar alcohol hydrogenation technology |
| CN203437105U (en) * | 2013-08-27 | 2014-02-19 | 山东道可化学有限公司 | Gas backflushing type alkali liquor reaction device |
| CN203778037U (en) * | 2014-03-06 | 2014-08-20 | 江苏格罗瑞化学有限公司 | Compression and discharge device of triazinone oxidation reaction kettle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106512864A (en) * | 2016-12-29 | 2017-03-22 | 杭州油脂化工有限公司 | Intermittent hydrogenation safety discharging device and safety discharging method |
| CN112882168A (en) * | 2021-01-28 | 2021-06-01 | 通鼎互联信息股份有限公司 | Oil supply system for filling ointment of central reinforcement of high-reliability optical cable |
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| CN104492345B (en) | 2016-08-24 |
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