CN106745066A - Produce, purify the safe technology and system of hydrogen cyanide - Google Patents
Produce, purify the safe technology and system of hydrogen cyanide Download PDFInfo
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- CN106745066A CN106745066A CN201611156491.4A CN201611156491A CN106745066A CN 106745066 A CN106745066 A CN 106745066A CN 201611156491 A CN201611156491 A CN 201611156491A CN 106745066 A CN106745066 A CN 106745066A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/02—Preparation, separation or purification of hydrogen cyanide
- C01C3/0208—Preparation in gaseous phase
- C01C3/0212—Preparation in gaseous phase from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process
- C01C3/022—Apparatus therefor
- C01C3/0225—Apparatus therefor characterised by the synthesis reactor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/02—Preparation, separation or purification of hydrogen cyanide
- C01C3/0208—Preparation in gaseous phase
- C01C3/0241—Preparation in gaseous phase from alcohols or aldehydes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/02—Preparation, separation or purification of hydrogen cyanide
- C01C3/0295—Purification
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Abstract
Produced suitable for methanol ammonoxidation method the invention discloses one kind, purify and obtain high-purity liquified hydrogen hydracid technique and related system, the main device such as including feed vaporization stove, ammonia oxidation reactor, ammonia removal column, hydrogen cyanide absorption tower, rectifying column of the technique.Compared to traditional hydrogen cyanide reparation technology, the method is using inert gas as Explosion suppressant, the firing property of elimination reaction gaseous mixture.Have that reaction temperature is low, pressure is low, stable temperature control, the characteristics of safe and reliable simultaneously.Particularly rectification and purification uses decompression operation, it is possible to decrease high concentration hydrogen cyanide leakage danger and tower reactor hydrogen cyanide polymerisation.The raw materials technology is easy to get, and whole process waste discharge is few, and clean environment firendly, degree of safety is high, and the hydrogen cyanide for being particularly suitable for middle and small scale is produced, purified.
Description
Technical field
The invention belongs to chemical production technology technical field, specifically one kind is produced simultaneously for methanol ammonoxidation method
Purification obtains the technique and device of high-purity liquid hydrogen cyanide, can be used for using the device of proper size according to the technique industrial big
Production or laboratory obtain high purity liquid state hydrogen cyanide on a small quantity.
Background technology
Hydrogen cyanide is a kind of important organic chemical industry's synthesis material, mainly for the production of adiponitrile, methionine, glycine,
Glyphosate, methyl methacrylate and Cymag etc., suffer from widely at aspects such as agricultural chemicals, medicine, dyestuff, auxiliary agent and metallurgy
Using.When production adiponitrile, methionine and other works containing cyaniding, medicine intermediate, in order to meet these it is often necessary to use high-purity liquid cyanogen
Change hydrogen, but because hydrogen cyanide is severe poisonous chemicals, and only 26 DEG C of atmospheric boiling point easily gasifies and volatilizees, and transports extremely dangerous, I
State forbids hydrogen cyanide to transport, therefore needs to be produced in situ in producing when hydrogen cyanide is used as synthesis material.
The industrial process of hydrogen cyanide mainly has acrylonitrile by-product method, light oil cracking method and iS-One method.Acrylonitrile by-product
Method and light oil cracking method all rely on other chemical industries, and production application is restricted.IS-One method is to be with methane, ammonia and oxygen
Raw material, ammoxidation reaction generation hydrogen cyanide is carried out with platinum, rhodium alloy catalyst, under the hot conditions more than 1000 DEG C.The party
Method is realized industrializing in the 1950's, is the main method of industrial production hydrogen cyanide.But iS-One method raw material methane blast pole
Limit wide ranges, reaction temperature are too high, exothermic heat of reaction amount is big, ammonia utilization rate is low, comparatively safe risk is high.In order to solve these not
Foot, people are improved to iS-One method from different perspectives.Wherein, substituting methane feed with methyl alcohol carries out ammoxidation reaction system
Hydrogen cyanide is taken, all there is advantage in terms of process safety and cost of material.Particularly methanol ammonoxidation produces hydrogen cyanide skill
The security of art is more practical for producing hydrogen cyanide intermediate raw material on a small scale.
The basis that methanol ammonoxidation produces hydrogen cyanide technology is the catalyst for obtaining high activity and stability, numerous studies
Also preparation and the modification technology of associated catalysts are focused primarily upon.External BP companies（US4485079、US4511548）, Asahi Chemical Industry
Company（JP79126698、JP7610200）All apply for that methanol ammonoxidation produces the Patents of hydrogen cyanide catalyst.It is domestic
Having mechanism has carried out related research and development, obtains Patents.Patent application CN1202458A proposes methanol ammonoxidation production hydrogen cyanogen
The method of acid, mainly elaborates improvement and preparation method of the used catalyst in terms of commercial Application；Patent application
CN104275190A disclose it is a kind of prepare catalyst of hydrogen cyanide and preparation method thereof for methanol ammonoxidation, the catalyst exists
In the case that ammonia is low to the consumption of methyl alcohol, hydrogen cyanide also has yield high, while also having activity that industrial production needs and steady
It is qualitative.
Under conditions of ripe catalyst is obtained, on methanol ammonoxidation produce the research of HCN and device also by
Gradually launch.Patent application CN201410394354 is proposed and a kind of be can be used for the reaction that methanol ammonoxidation produces gas phase hydrogen cyanide
Device, mainly solves the removal and reaction temperature control of methanol ammonoxidation process thermal discharge.Because most of hydrogen cyanide chemical industry is straight
Connect using hydrogen cyanide gas or other mixtures, without separating-purifying, therefore the correlative study purified to subsequent purification compared with
It is few.But part medicine, purity requirement of the fine chemistry industry to hydrogen cyanide are higher, need to use the high-purity hydrogen cyanide of liquid.With hydrogen cyanide
Purity is improved, and its security risk also accordingly increases, therefore the purifying technique and security of hydrogen cyanide are most important.
The content of the invention
The drawbacks of it is an object of the invention to evade acrylonitrile by-product method, iS-One method production hydrogen cyanide, for methanol ammonia oxygen
Change method produces hydrogen cyanide, proposes a kind of safe and reliable technique and correlation for continuously producing, purifying acquisition high-purity liquid hydrogen cyanide
Device.
The present invention adopts the following technical scheme that realization：
A kind of safe technology system for producing, purifying hydrogen cyanide, including tube furnace, the tube furnace mixed gas outlet and shell and tube
The top inlet connection of fixed bed reactors, the calandria type fixed bed reactor is connected with the salt melting system of outer circulation, described
The bottom gas outlet of calandria type fixed bed reactor is connected with the bottom inlet of pickling tower, and the top gas of the pickling tower go out
Mouthful it is connected with the bottom inlet on hydrogen cyanide absorption tower by entrainment trap, the outlet at bottom on the hydrogen cyanide absorption tower and rectifying
Tower import is connected, and the bottom lean solution outlet of the rectifying column is connected with the apical sink agent import on hydrogen cyanide absorption tower；The essence
Top of tower connection condenser is evaporated, the condenser connects vacuum system.
The safe technology for be applied to the producing of said system, purifying hydrogen cyanide is as follows：
（1）, raw material mixing preheating：
Mix with compressed air again after first mixing with inert gas after the preheated vaporization of ammonia, 20 ~ 40 DEG C of ammonia preheating temperature, pressure
Contracting air pressure is 0.1 ~ 0.4Mpa；Gaseous mixture enters tube furnace from methyl alcohol charging mouth of pipe surrounding, pushes up methyl alcohol vaporizing simultaneously
Mix with methyl alcohol；Tube furnace temperature control is 260 ~ 300 DEG C；
（2）, methanol ammonoxidation reaction：
Mixed gas after preheating enter in the calandria type fixed bed reactor of filling methanol ammonoxidation catalyst, reactor temperature control
Scope is 350 ~ 500 DEG C, and reactor reaction Stress control is 0.2 ~ 0.25Mpa, the control of reactor inlet outlet pressure differential 20 ~
70kpa；
（3）, except ammonia：
Reacted mixed gas enter pickling tower after being cooled to 200 ~ 300 DEG C from bottom of towe, and tower top adds the concentrated sulfuric acid or SPA
As ammonia absorbent；Pickling tower top adds the process water for being less than 20 DEG C by the temperature control of tower top mixed gas 60 ~ 80 simultaneously
DEG C, pickling column overhead pressure is 0.16 ~ 0.21Mpa；60 ~ 80 DEG C of tower bottoms control ph 1 ~ 3, kettle liquid temperature；
（4）, hydrogen cyanide absorb：
Hydrogen cyanide is sent into after the mixed gas for removing ammonia are cooled into 25 ~ 40 DEG C and absorbs tower bottom, absorbent uses process water
Or the hydrogen cyanide lean solution of tower bottom of rectifying tower, absorbent greenhouse cooling to 5 ~ 20 DEG C, absorbing tower pressure on top surface is 0.13 ~
0.18Mpa, the waste gas after absorption enters collection conduit burning disposal；
（5）Hydrogen cyanide rectification and purification：
Absorbing liquid enters rectifying column, and rectifying column uses rectification under vacuum, and operating pressure scope is 30 ~ 75kpa, rectifying tower reactor temperature control
Scope processed is 40 ~ 70 DEG C；Rectifying column tower top sets up B-grade condensation system, it is ensured that hydrogen cyanide is fully condensed；During rectifying, overhead condensation
Device temperature control is continuously added to polymerization inhibitor below 10 DEG C, with 5:1 reflux ratio produces product, and it is higher than 99.8% to obtain concentration
Liquid hydrogen cyanide；Vacuum system uses oil-free dry vacuum pump, gas feeding burned waste gas system treatment；Lean solution after rectifying is changed
Recycled as absorption tower absorbing liquid after heat, reduce waste discharge.
Hydrogen cyanide proposed by the present invention is produced, purifying technique and device compare traditional hydrogen cyanide reparation technology, the present invention
Method is using inert gas as Explosion suppressant, the firing property of elimination reaction gaseous mixture.Have that reaction temperature is low, pressure is low simultaneously,
Stable temperature control, the characteristics of safe and reliable.Particularly rectification and purification uses decompression operation, it is possible to decrease the leakage of high concentration hydrogen cyanide is dangerous
And tower reactor hydrogen cyanide polymerisation.The raw materials technology is easy to get, and whole process waste discharge is few, and clean environment firendly, degree of safety is high, special
Not Shi He the hydrogen cyanide of middle and small scale produce, purify.
The hydrogen cyanide of present invention design is produced, purifying technique and relevant apparatus, and its safe, scope of application is wider, energy
It is enough according to device size, can be used for a small amount of high purity liquid hydrogen cyanide needed for laboratory produce and commercial scale amount liquid
Body hydrogen cyanide is produced, with preferable marketing application value.
Brief description of the drawings
Fig. 1 represents that the schematic flow sheet of set technique and system is produced, purified to hydrogen cyanide.
In figure：1- tube furnaces, 2- calandria type fixed bed reactors, 3- pickling towers, 4- hydrogen cyanide absorption tower, 5- rectifying columns,
6- condensers, 7- vacuum systems, 8- salt melting systems, 9- entrainment traps.
Specific embodiment
Specific embodiment of the invention is described in detail below.
It is of the present invention produce, purifying technique and relevant apparatus it is as follows, as shown in Figure 1：
（1）, raw material mixing preheating device：
Mix with compressed air again after first mixing with inert gas after the preheated vaporization of ammonia, 20 ~ 40 DEG C of ammonia preheating temperature, pressure
Contracting air pressure is 0.1 ~ 0.4Mpa.Gaseous mixture enters tube furnace from methyl alcohol charging mouth of pipe surrounding, pushes up methyl alcohol vaporizing simultaneously
Mix with methyl alcohol.After ammonia successively mixes with inert gas, air, then mix with methyl alcohol.Ammonia and methyl alcohol in mixed gas
The amount ratio of material is 1.02 ~ 1.10:1, ammonia is 0.1 ~ 0.12 with the amount ratio of the material of air:1, the inert gas volume being mixed into
The 12 ~ 18% of gaseous mixture cumulative volume are accounted for, to reduce reaction mixture gas body explosive characteristic, it is ensured that reaction safety.Tube furnace temperature control is
260 ~ 300 DEG C, it is ensured that methyl alcohol is completely vaporized, and unstripped gas is preheated.
（2）, methanol ammonoxidation reaction unit：
Reaction unit uses calandria type fixed bed reactor, is packed into the catalyst after type in pipe, reaction temperature control scope for 350 ~
500 DEG C, reaction pressure be 0.2 ~ 0.25Mpa.Reactor, as heat carrier, reactor is heated using the molten salt system of outer circulation
To temperature needed for reaction, while reaction liberated heat can also be removed, prevent reaction temperature too high.Molten salt system can be using steaming
The modes such as vapour heating, electrical heating, cooling can use air cooling or water-cooling pattern, and fused salt circulation tankage is that reactor accommodates fused salt amount
2 ~ 4 times, to play heat cushioning effect, prevent reaction temperature too high.
（3）, ammonia removal device：
The unreacted ammonia of excess in course of reaction is removed using pickling tower.Reacted mixed gas are cooled to 200 ~ 300
Enter pickling tower from bottom of towe after DEG C, tower top adds the concentrated sulfuric acid or SPA as ammonia absorbent.Pickling tower top is added and is less than simultaneously
The temperature control of tower top mixed gas at 60 ~ 80 DEG C, is on the one hand prevented the too high influence of gas temperature except ammonia by 20 DEG C of process water
Effect, on the one hand avoids temperature too low, causes hydrogen cyanide to be dissolved in pickle；Pickling column overhead pressure be 0.16 ~
0.21Mpa, tower top sets entrainment trap, prevents gas band liquid；60 ~ 80 DEG C of tower bottoms control ph 1 ~ 3, kettle liquid temperature, in case
Only sulphur ammonium is decomposed, while not containing HCN in ensureing tower reactor discharge liquor, tower bottoms is partly recycled to tower top, ensures and removes ammonia effect.
（4）, hydrogen cyanide absorption plant：
Sent into after the mixed gas for removing ammonia are cooled into 25 ~ 40 DEG C and absorb tower bottom, absorption tower is re-fed into after cooling can be increased
Plus hydrogen cyanide assimilation effect.Absorbent needs cooling using process water or the hydrogen cyanide lean solution of tower bottom of rectifying tower, absorbent temperature
To 5 ~ 20 DEG C, assimilation effect is ensured；Absorbing tower pressure on top surface is 0.13 ~ 0.18Mpa, and the waste gas after absorption burns into collection conduit
Burning treatment.
（5）, hydrogen cyanide rectification and purification device：
Rectifying column uses rectification under vacuum, and operating pressure scope is 30 ~ 75kpa, and rectification under vacuum can reduce the leakage of rectifying column hydrogen cyanide
Risk, while tower reactor heating-up temperature can be reduced.Rectifying tower reactor temperature controlling range is 40 ~ 70 DEG C, can avoid hydrogen cyanide in high temperature
Under polymerisation；B-grade condensation system that rectifying column tower top is set up, ensure that hydrogen cyanide is fully condensed；During rectifying, in condenser
Add polymerization inhibitor（Glacial acetic acid or sulfur dioxide, do not influence to purify hydrogen cyanide product quality）；Vacuum system is true using oil-free dry
Empty pump, gas feeding burned waste gas system treatment；Recycled as absorption tower absorbing liquid after lean solution heat exchange after rectifying, reduced
Waste discharge.
During specific implementation, mixed with 15L/min nitrogen with 7L/min speed after liquid ammonia vaporization（Inert gas is not limited to nitrogen
Gas, it is also possible to select water vapour, argon gas, carbon dioxide etc.）, then add the mixing of 70L/min air.Methyl alcohol is with 12mL/min
Into being about in the tube furnace 1 of 1m, internal diameter 0.2m filling aluminum oxide ceramic ring, NH in mixed unstripped gas is vaporized3、O2、CH3OH
Material amount ratio be 1.05:2.22:1, unstripped gas preheating temperature is 240 ± 5 DEG C.Mixed gas after preheating enter in 60
During footpath is for the calandria type fixed bed reactor 2 of 0.02m, 0.8m long filling methanol ammonoxidation catalyst, reactor temperature control scope is
400 ± 10 DEG C, reactor reaction Stress control is 0.16 ± 0.02Mpa（Gauge pressure）, the control of reactor inlet outlet pressure differential 20 ~
70kpa.The salt melting system configuration heating of reactor and refrigeration system, provide temperature needed for reaction, remove heat of reaction respectively, will
Reaction controlling ensures course of reaction safety in certain temperature range.Mixed gas are cooled to 260 DEG C or so into acid after reaction
Wash the bottom of tower 3,10 DEG C of technique water flow velocities of pickling top of tower are that to add speed be 600-800mL/h with control tower for 1L/h, the concentrated sulfuric acid
Kettle liquid pH value be 3 ~ 4, pickling tower top simultaneously add ammonia absorbent and the process water less than 20 DEG C, each serve as removing ammonia and
Reduce the effect of temperature；Tower reactor liquid temperature control is 70 ~ 80 DEG C, and is added to tower top with the internal circulating load of 2kg/h, ensures that ammonia absorbs
Completely.The gas for removing ammonia keeps 0.13Mpa（Gauge pressure）Pressure, be cooled to 35 DEG C and enter hydrogen cyanide absorption towers 4.Absorption tower
Top adds 10 DEG C of absorbents with the flow of 8 ~ 10kg/h（Absorbent mainly process water, operates steadily when device brings into operation
The hydrogen cyanide lean solution after rectifying is mainly afterwards）.Gas after absorption is with 0.06Mpa（Gauge pressure）Pressure be discharged into gas sampling pipe
In road.Absorption tower tower reactor concentration is added to the bottom of rectifying column 5 for 4% ~ 8% hydrogen cyanide rich solution using magnetic drive pump.Rectifying column depressurizes
Operating pressure is 65 ~ 75kpa（Absolute pressure）, bottom temperature is 65 ± 2 DEG C, control tower bottoms position extraction hydrogen cyanide lean solution, cooling drop
Warm Posterior circle is used.Overhead condenser temperature control continuous adds ice in condenser below 10 DEG C with the speed of 8mL/h
Acetic acid, with 5:1 reflux ratio produces product, can obtain liquid hydrogen cyanide 0.4 ~ 0.5kg/h of the concentration higher than 99.8%.
The system can be automatically controlled using DCS, and set cyanogen in sensitive parts such as rectifying column, absorbing tower, reactors
Change hydrogen detector and realize safety interlocking and the control of urgent automatic stopping.This method W-response, rectification temperature are low, whole system pressure
Power is relatively low, and waste gas is easy to collection treatment, and process water recycling rate is high, and wastewater discharge is few.
Above example is merely to illustrate technical scheme and unrestricted, although with reference to preferred embodiments to the present invention
It has been be described in detail that, it will be appreciated by those skilled in the art that the technical scheme that can use for reference invention is modified or equally replaced
Change, without deviating from it is of the invention in a word and scope, be regarded as being included within the right of invention.
Claims (6)
1. a kind of safe technology for producing, purifying hydrogen cyanide, it is characterised in that：Comprise the following steps：
（1）, raw material mixing preheating：
Mix with compressed air again after first mixing with inert gas after the preheated vaporization of ammonia, 20 ~ 40 DEG C of ammonia preheating temperature, pressure
Contracting air pressure is 0.1 ~ 0.4 Mpa；Gaseous mixture enters tube furnace from methyl alcohol charging mouth of pipe surrounding（1）, push up methanol vapor
Change and mix with methyl alcohol；Tube furnace temperature control is 260 ~ 300 DEG C；
（2）, methanol ammonoxidation reaction：
Mixed gas after preheating enter the calandria type fixed bed reactor of filling methanol ammonoxidation catalyst（2）In, reactor
Temperature control scope is 350 ~ 500 DEG C, and reactor reaction Stress control is 0.2 ~ 0.25Mpa, the control of reactor inlet outlet pressure differential 20 ~
70kpa；
（3）, except ammonia：
Reacted mixed gas enter pickling tower after being cooled to 200 ~ 300 DEG C from bottom of towe（3）, tower top the addition concentrated sulfuric acid or dense phosphorus
Acid is used as ammonia absorbent；Simultaneously pickling tower top add process water less than 20 DEG C by the temperature control of tower top mixed gas 60 ~
80 DEG C, pickling column overhead pressure is 0.16 ~ 0.21Mpa；60 ~ 80 DEG C of tower bottoms control ph 1 ~ 3, kettle liquid temperature；
（4）, hydrogen cyanide absorb：
Hydrogen cyanide absorption tower is sent into after the mixed gas for removing ammonia are cooled into 25 ~ 40 DEG C（4）Bottom, absorbent uses technique
The hydrogen cyanide lean solution of water or tower bottom of rectifying tower, absorbent greenhouse cooling to 5 ~ 20 DEG C, absorbing tower pressure on top surface is 0.13 ~
0.18Mpa, the waste gas after absorption enters collection conduit burning disposal；
（5）Hydrogen cyanide rectification and purification：
Absorbing liquid enters rectifying column（5）, rectifying column uses rectification under vacuum, and operating pressure scope is 30 ~ 75kpa, rectifying column kettle temperature
Degree control range is 40 ~ 70 DEG C；Rectifying column tower top sets up B-grade condensation system, it is ensured that hydrogen cyanide is fully condensed；During rectifying, tower top
Condenser（6）Temperature control is continuously added to polymerization inhibitor below 10 DEG C, with 5:1 reflux ratio produces product, and obtaining concentration is higher than
99.8% liquid hydrogen cyanide；Vacuum system uses oil-free dry vacuum pump, gas feeding burned waste gas system treatment；After rectifying
Lean solution heat exchange after as absorption tower absorbing liquid recycle, reduce waste discharge.
2. the safe technology for producing, purifying hydrogen cyanide according to claim 1, it is characterised in that：Step（1）In, mixing
Ammonia in gas gas is 1.02 ~ 1.10 with the amount ratio of the material of methyl alcohol：1, ammonia is 0.1 ~ 0.12 with the amount ratio of the material of air:1,
The inert gas volume being mixed into accounts for the 12 ~ 18% of gaseous mixture cumulative volume.
3. the safe technology for producing, purifying hydrogen cyanide according to claim 1, it is characterised in that：Step（2）In, reaction
Device uses the salt melting system of outer circulation（8）As heat carrier；Salt melting system（8）Using steam heating or electrical heating, cooling is adopted
With air cooling or water-cooling pattern, fused salt circulation tankage is 2 ~ 4 times that reactor accommodates fused salt amount.
4. the safe technology for producing, purifying hydrogen cyanide according to claim 1, it is characterised in that：Step（3）In, pickling
Tower（3）Tower top set entrainment trap（9）, prevent gas band liquid.
5. the safe technology for producing, purifying hydrogen cyanide according to claim 1, it is characterised in that：Step（5）In, it is described
Polymerization inhibitor is glacial acetic acid or sulfur dioxide.
6. a kind of safe technology system for producing, purifying hydrogen cyanide, it is characterised in that：Including tube furnace（1）, the tube furnace
（1）Mixed gas outlet and calandria type fixed bed reactor（2）Top inlet connection, the calandria type fixed bed reactor（2）
It is connected with the salt melting system of outer circulation（8）, the calandria type fixed bed reactor（2）Bottom gas outlet with pickling tower（3）
Bottom inlet connection, the pickling tower（3）Top gas outlet pass through entrainment trap（9）With hydrogen cyanide absorption tower（4）
Bottom inlet connection, the hydrogen cyanide absorption tower（4）Outlet at bottom and rectifying column（5）Import is connected, the rectifying column（5）
The outlet of bottom lean solution and hydrogen cyanide absorption tower（4）Apical sink agent import connection；The rectifying column（5）Top connection condensation
Device（6）, the condenser（6）Connection vacuum system（7）.
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| CN201611156491.4A CN106745066B (en) | 2016-12-15 | 2016-12-15 | Produce, purify the safe technology and system of hydrogen cyanide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434253A (en) * | 2017-08-06 | 2017-12-05 | 河北诚信有限责任公司 | A kind of continuous production technology and its production system of high-quality cyanide solution |
| CN112441944A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | A dehydrocyanic acid system for making acrylonitrile |
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| CN101597240A (en) * | 2009-07-16 | 2009-12-09 | 北京智博凯源科技有限公司 | The method of methanol ammonia fluidized dehydrogenation one-step synthetising nitrile and Padil |
| CN104190328A (en) * | 2014-08-12 | 2014-12-10 | 中国天辰工程有限公司 | Reactor used for preparing gas-phase hydrogen cyanide |
| CN105366692A (en) * | 2015-12-04 | 2016-03-02 | 中国天辰工程有限公司 | Process and system for preparing high-purity liquid hydrogen cyanide |
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2016
- 2016-12-15 CN CN201611156491.4A patent/CN106745066B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597240A (en) * | 2009-07-16 | 2009-12-09 | 北京智博凯源科技有限公司 | The method of methanol ammonia fluidized dehydrogenation one-step synthetising nitrile and Padil |
| CN104190328A (en) * | 2014-08-12 | 2014-12-10 | 中国天辰工程有限公司 | Reactor used for preparing gas-phase hydrogen cyanide |
| CN105366692A (en) * | 2015-12-04 | 2016-03-02 | 中国天辰工程有限公司 | Process and system for preparing high-purity liquid hydrogen cyanide |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434253A (en) * | 2017-08-06 | 2017-12-05 | 河北诚信有限责任公司 | A kind of continuous production technology and its production system of high-quality cyanide solution |
| CN107434253B (en) * | 2017-08-06 | 2019-12-17 | 河北诚信集团有限公司 | Continuous production process and production system of high-quality cyanide solution |
| CN112441944A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | A dehydrocyanic acid system for making acrylonitrile |
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| CN106745066B (en) | 2019-01-22 |
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