CN105294414A - Formaldehyde production system - Google Patents
Formaldehyde production system Download PDFInfo
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- CN105294414A CN105294414A CN201510808769.0A CN201510808769A CN105294414A CN 105294414 A CN105294414 A CN 105294414A CN 201510808769 A CN201510808769 A CN 201510808769A CN 105294414 A CN105294414 A CN 105294414A
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- methyl alcohol
- formaldehyde
- methanol
- absorption tower
- exhaust gas
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
- C07C45/37—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups
- C07C45/38—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of >C—O—functional groups to >C=O groups being a primary hydroxyl group
Abstract
The invention provides a formaldehyde production system. The system comprises a methanol raw material tank, a methanol intermediate tank, a methanol reboiler, a methanol evaporator, a quaternary mixer, a methanol evaporator, an air heater, a steam filter, a tail gas heater, a filter, an oxidizer, a first absorption tower, a second absorption tower, a tail gas processor, a tail gas heater, and a formaldehyde intermediate tank. The system completes the following steps: (1) evaporation and gas production: obtaining qualified quaternary mixed gas; (2) oxidization: oxidizing and dehydrogenizing methanol in the presence of an electrolytic silver catalyst so as to convert methanol into formaldehyde, wherein a few of byproducts are generated during the process; (3) absorption: taking water and formaldehyde solution as the absorbents, and carrying out continuous counter-current absorption in a packed absorbing tower to produce an industrial formaldehyde solution. The provided system can fully utilize tail gas circulation to produce formaldehyde, the utilization rate of raw materials is high, and little waste is generated.
Description
Technical field
The invention belongs to technical field of chemical production equipment, relate generally to a kind of Formaldehyde Production system making full use of production tail gas.
Background technology
Domestic current Formaldehyde Production enterprise has exceeded 5000, and aggregated capacity is about 3,200 ten thousand tons.Because formaldehyde Technology is updated, formaldehyde is developed into " aerogenesis type " by former " consumption vapour type ", and namely formaldehyde plant all can realize byproduct steam.Wherein formaldehyde plant steams o'clock primarily of two, and one is utilize the thermogenetic 0.4MPa steam of the reaction of oxidizer, and two is the steam of the pressure controllable that the heat of the exhaust combustion utilizing formaldehyde plant produces, and normally produces 0.8MPa.Simultaneously in formaldehyde production, in oxidation reactor, also need supplementary steam as reaction feed, in this step, require that the steam entered in reactor is 0.15MPa.The steam pressure-reducing of the 0.4MPa steam produced in formaldehyde reaction device or 0.8MPa is normally sent into reactor and is carried out batching steam by current Formaldehyde Production enterprise to 0.15MPa, causes high pressure steam energy directly to waste; And the Formaldehyde Production producer byproduct steam part of domestic formaldehyde industry, because vapor pressure is lower, use value is lower, so byproduct steam removes outside domestic water heating substantially, it is all direct emptying process, not only noise is large, and energy wastage is very serious, does not meet the expectation that national energy-saving reduces discharging.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of Formaldehyde Production system, it comprises:
Methanol feedstock tank, methyl alcohol tundish, methyl alcohol strainer, methyl alcohol reboiler, methanol evaporator, described methanol feedstock tank, methyl alcohol tundish, methyl alcohol strainer, methyl alcohol reboiler, methanol evaporator connect successively, described methanol feedstock tank provides methyl alcohol for described methyl alcohol tundish, then by methyl alcohol strainer, methyl alcohol is filtered, the bottom that methyl alcohol after filtration passes into described methyl alcohol reboiler is heated, described methyl alcohol is by heating and gasifying in described methyl alcohol reboiler, and the methyl alcohol of gasification passes into described methanol evaporator;
Quaternary mixing tank, methanol evaporator, airheater, vapor filter, heater exhaust gas, described methanol evaporator, airheater, vapor filter, heater exhaust gas are connected with described quaternary mixing tank respectively and provide methanol steam, warm air, steam and tail gas successively for described quaternary mixing tank, and described methanol steam, warm air, steam and tail gas form quaternary mixed gas in described quaternary mixing tank;
Strainer, oxidizer, described strainer one end is connected with described quaternary mixing tank, the described strainer the other end is connected with described oxidizer, quaternary mixed gas is passed into described strainer by described quaternary mixing tank, described strainer passes into described oxidizer after being filtered by quaternary mixed gas, described quaternary mixed gas in oxidizer with catalyst exposure and reacting by heating;
First absorption tower, second absorption tower, exhaust gas treating device, heater exhaust gas, formaldehyde tundish, described oxidizer is connected with described first absorption tower, described first absorption tower, second absorption tower, exhaust gas treating device connects successively, described first absorption tower is connected with formaldehyde tundish, the formaldehyde gas produced in described oxidizer is successively by described first absorption tower, second absorption tower absorbs, the tail gas produced is divided into two-way and passes into described exhaust gas treating device and heater exhaust gas, exhaust combustion is heated water generates steam by described exhaust gas treating device, described heater exhaust gas will pass into described quaternary mixing tank after tail gas heating, described second absorption tower by pump for described first absorption tower provides rare formaldehyde, the formaldehyde solution meeting concentration of formaldehyde pumps in described formaldehyde tundish and stores by described first absorption tower.
Preferably, described methyl alcohol reboiler, airheater, vapor filter, heater exhaust gas heat respectively by steam, and described steam is generated by a drum.
Preferably, described oxidizer has a quench zone, by cooling soft water, described quench zone is cooled, the hot water produced passes into described drum, described drum provides hot water for described exhaust gas treating device, and described exhaust gas treating device heats by combustion tail gas the steam that the hot water that passes into produces and passes into described drum.
Preferably, described drum by vapour distributor by steam distribution to described methyl alcohol reboiler, airheater, vapor filter, heater exhaust gas.
Preferably, then described quaternary mixed gas first enters oxidizer through spark arrester after purification, contacts at the temperature of about 650 DEG C with silver catalyst.
Preferably, described methanol evaporator passes into described quaternary mixing tank after the mesh mist eliminator precipitation of liquid droplets at its top.
Preferably, normal temperature air is passed in described airheater after being filtered by an air filter.
The present invention has following beneficial effect:
Specifically can description in reference example.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described describing the required accompanying drawing used to embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The Formaldehyde Production system composition schematic diagram that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide a kind of Formaldehyde Production system, it comprises: methanol feedstock tank 1, methyl alcohol tundish 2, methyl alcohol strainer 3, methyl alcohol reboiler 4, methanol evaporator 5, methanol feedstock tank 1, methyl alcohol tundish 2, methyl alcohol strainer 3, methyl alcohol reboiler 4, methanol evaporator 5 connects successively, methanol feedstock tank 1 provides methyl alcohol for methyl alcohol tundish 2, then filtered by methyl alcohol strainer 3 pairs of methyl alcohol, the bottom that methyl alcohol after filtration passes into methyl alcohol reboiler 4 is heated, described methyl alcohol is heating and gasifying in methyl alcohol reboiler 4, the methyl alcohol of gasification passes into methanol evaporator 5,
Quaternary mixing tank 7, methanol evaporator 5, airheater 8, vapor filter 9, heater exhaust gas 17, methanol evaporator 5, airheater 8, vapor filter 9, heater exhaust gas 17 are connected with quaternary mixing tank 7 respectively and provide methanol steam, warm air, steam and tail gas successively for quaternary mixing tank 7, and described methanol steam, warm air, steam and tail gas form quaternary mixed gas in quaternary mixing tank 7;
Strainer 10, oxidizer 11, strainer 10 one end is connected with quaternary mixing tank 7, strainer 10 the other end is connected with oxidizer 11, quaternary mixed gas is passed into strainer 10 by quaternary mixing tank 7, strainer 10 passes into oxidizer 11 after being filtered by quaternary mixed gas, and described quaternary mixed gas is oxidizer 11 in and catalyst exposure reacting by heating;
First absorption tower 14, second absorption tower 15, exhaust gas treating device 16, heater exhaust gas 17, formaldehyde tundish 18, oxidizer 11 is connected with the first absorption tower 14, first absorption tower 14, second absorption tower 15, exhaust gas treating device 16 connects successively, first absorption tower 14 is connected with formaldehyde tundish 18, the formaldehyde gas produced in oxidizer 11 is successively by the first absorption tower 14, second absorption tower 15 absorbs, the tail gas produced is divided into two-way and passes into exhaust gas treating device 16 and heater exhaust gas 17, exhaust combustion is heated water generates steam by exhaust gas treating device 16, heater exhaust gas 17 will pass into quaternary mixing tank 7 after tail gas heating, second absorption tower 26 by pump for the first absorption tower 14 provides rare formaldehyde, the formaldehyde solution meeting concentration of formaldehyde pumps in formaldehyde tundish 18 and stores by the first absorption tower 14, formaldehyde tundish 18 are also connected with a formaldehyde finished pot 19, formaldehyde finished pot 19 is for storing finished product formaldehyde in a large number.
As shown in the figure, methyl alcohol reboiler 4, airheater 8, vapor filter 9, heater exhaust gas 17 heat respectively by steam, and described steam is generated by drum 12; Oxidizer 11 has a quench zone, by cooling soft water, described quench zone is cooled, the hot water produced passes into drum 12, and drum 12 provides hot water for exhaust gas treating device 16, and exhaust gas treating device 16 heat the hot water generation passed into steam by combustion tail gas passes into drum 12.
Drum 12 passes through vapour distributor 13 by steam distribution to methyl alcohol reboiler 4, airheater 8, vapor filter 9, heater exhaust gas 17.
Then described quaternary mixed gas first enters oxidizer 11 through spark arrester after purification, contacts at the temperature of about 650 DEG C with silver catalyst.
Methanol evaporator 5 passes into quaternary mixing tank 7 after the mesh mist eliminator precipitation of liquid droplets at its top.
In the present embodiment, the technological process of production is:
Methyl alcohol squeezes into reboiler from methyl alcohol tundish by methanol pump; Enter bottom reboiler from methyl alcohol tundish methyl alcohol out by after governor valve control flow; Reboiler shell side heats by from drum and through the heating steam of governor valve control the methanol gasifying made in reboiler simultaneously, methyl alcohol gas in methanol evaporator from vaporizer top after mesh mist eliminator precipitation of liquid droplets, enter quaternary gas mixer through the pipeline with steam jacket pipe, the methanol solution pump around circuit in vaporizer is bottom reboiler.The air come from air filter sends into airheater by Root's blower, after preheating, enter mixing tank, and batching steam enters mixing tank by variable valve adjust flux from vapour distributor after vapor filter filters.
After normal driving, after exhaust gas circulation system is first qualified with tail gas displacement, opens tail gas gas blower and the partial tail gas after well heater preheating is sent into mixing tank.Quaternary gas Homogeneous phase mixing in mixing tank, then through strainer further cross elimination may with a small amount of impurity after again by spark arrester send into be equipped with in the oxidizer of catalyzer.Reactant gases passes through catalyst layer, and oxidation and the dehydrogenation reaction of methyl alcohol occur under the effect of high temperature and catalyzer, generates formaldehyde gas.For preventing the thermolysis of reaction product, the hot gas of generation carries out quenching by the quench zone be close to oxidizer rapidly, then sends in absorption tower and absorbs.Formaldehyde finished product, by first grade absorption tower extraction, is added by two-level absorption tower top for the supplementary process water absorbing formaldehyde gas; After rare aldehyde liquid pump at the bottom of two-level absorption tower is got, component loops returns in tower the formaldehyde absorbing the first absorption tower and do not absorbed, and another part sends into the supplementary absorption liquid that first order absorption top of tower does the first absorption tower; The unabsorbed tail gas in two-level absorption tower top is separated after moisture through High-efficiency trap, and a road is sent in exhaust gas treating device and burnt, and liberated heat is used for indirectly producing water vapor; Another road tail gas carries out circulation of tail gas via entering production system again through heater exhaust gas preheating after the pressurization of tail gas gas blower.
The technique entering system due to tail gas belongs to quite ripe Technology, embodiment of the present invention circulation of tail gas silver method explained hereafter 50% formaldehyde mainly adopts methyl alcohol excessive, the limits of explosion of methyl alcohol is between 6%-36.5%, exhaust gas circulation process controls methyl alcohol in oxygen than at about 40%-42%, higher than limits of explosion.Wherein the limits of explosion of hydrogen is 4.1%-74.1%, in tail gas after two towers do not absorb completely, the concentration of hydrogen is between 1%-1.5%, through exhaust fan, the tail gas of about 30% is re-used by system, at quaternary gas mixer and air, water vapour, methanol gas mixes, make the concentration of hydrogen well below 1%, in this mixed gas, the concentration of hydrogen is also well below its limits of explosion 4.1%-74.1%, and therefore the suitable ripe safety of system process is entered in the circulation of tail gas, does not need supporting hydrogen gas recovering device.
The embodiment of the present invention can be analyzed to multiple operation, wherein each specification and main technique controling parameters as follows:
(1) evaporation, gas operation processed
The task of this operation is exactly that oxidizing operation provides the quaternary mixed gas meeting procedure technology and require, comprise methyl alcohol, air, tail gas, the conveying of water vapour and the preparation of gas mixture and gas overheated, filter, the operating process such as back-fire relief.
The conveying of methyl alcohol: the object of the conveying of methyl alcohol is in order to continuous, stable supply methanol evaporator methyl alcohol; The conveying of methyl alcohol realizes by impeller pump.
The conveying of air: the object of air conveying is to provide required oxygen to methanol oxidation continuously, stably, utilizes the components such as the nitrogen in air simultaneously, removes unnecessary reaction heat; Air is obtained from air by gas blower.
Tail gas is carried: the object of tail gas conveying has three.The first, replace water vapour to play thermal barrier; The second, add partial tail gas and reduce the aerial explosive range of methyl alcohol, be conducive to safety in production; 3rd due to the composition of tail gas unique, can concentrated formaldehyde be produced, suppress dehydrogenation reaction, reduce oxygen temperature, reduce negative reaction thus reduction unit consumption.
The conveying of water vapour: the object of moisture vapor transport mainly contains three, one has been the effect of thermal barrier, and two is reduce the explosive range of methyl alcohol in gas mixture, be conducive to safety in production, three is the generations that can prevent from tying carbon reaction, clean silver-colored catalytic bed, extending catalyst work-ing life; Ingredient water steam is supplied by the water vapour of system waste heat by-product.
The preparation of material mixed gas: be ratio of components in order to ensure methyl alcohol, air and water vapour by the object that processing requirement is made into a certain proportion of unstripped gas by methanol-air-water vapour, to meet the requirement of reaction process and safety in production.
Overheated operation: the task of overheated operation controls the temperature of quaternary gas mixture before entering oxidizer, prevents drop, with the activity of guard catalyst.The control of temperature of superheat realizes by the mode of steam indirect heating quaternary gas.
The purification of quaternary gas mixture: the purification object of quaternary gas mixture is the objectionable impurities that will remove in raw material, prevents poisoning of catalyst and loses activity.The purification means of quaternary gas mixture are by quaternary gas by strainer, entrained solid impurity in removing gas.In addition, the clean level of clean conditions on unstripped gas of device (comprising e-quipment and pipe) has important impact.
Concrete evaporation, gas process flow processed are:
Methyl alcohol is carried from methyl alcohol tundish methanol pump, after governor valve control flow, enter reboiler; The reboiler be connected with vaporizer is by making methanol gasifying after steam-heated cal(l)andria, and methanol gas is left vaporizer and entered mixing tank; Air enters mixing tank after sending into heater heats by gas blower, and the unstripped gas leaving mixing tank delivers to oxidizer after fire-retardant filter.
(2) oxidation operation
The task of this operation is:
Material mixed gas is after purification, control certain flow velocity and enter oxidizer, oxidation, the dehydrogenation reaction of methyl alcohol is carried out under the effect of catalyst for electrolytic silver, be formaldehyde by methanol conversion and produce a small amount of by product, in this process operations, the height that oxidizing temperature controls, the proportion of composing of quaternary gas and the height of catalyst activity, all directly affect transformation efficiency and the specific absorption of methyl alcohol.
This process flow be:
Then quaternary mixed gas first enters oxidizer through spark arrester after purification, contacts at the temperature of about 650 DEG C with silver catalyst; Overwhelming majority methyl alcohol is converted into formaldehyde, and releases a large amount of reaction heat; The high-temperature gas generated is rapidly by the quench zone of oxidizer, its heat carried carries out heat exchange with the soft water from oxidizer gas bag by tubulation wall, the saturated steam of indirect generation enters vapor distributor for production and application, generates product feeding first grade absorption tower and carry out absorption operation after cooling.
(3) operation is absorbed
This operation task is:
The task of this operation is the formaldehyde gas generated after transforming at oxidation section, in packed absorber with water and formaldehyde solution for absorption agent, absorb through continuous countercurrent and make industrial formaldehyde solution; In this operating unit, the efficiency on absorption tower and the performance quality of cooling system, will directly affect Yield and quality and the raw material consumption of formaldehyde products.
The idiographic flow of this operation is:
From the formaldehyde gas mixture of oxidizer, enter the bottom of first grade absorption tower; Formaldehyde gas is absorbed by circulation fluid top-down in tower, and remaining formaldehyde gas is discharged by tower top, enters second absorption tower and continues to be absorbed; After fully absorbing, the remaining tower top tail gas part containing the gas such as trace formaldehyde, methyl alcohol, CO, CO2, CH4 and N2, H2 is sent in exhaust gas treating device and is burnt, gas high-altitude after burning enters air, liberated heat is for generation of high-pressure steam, and partial tail gas is through the laggard mixing tank recycle of heater heats; The technique soft water of air water needed for being separated in drum, absorbing is sent into by outer tube and is added by two-level absorption tower tower top after spinner-type flowmeter measures, and by regulating amount of water to control finished product concentration; The absorption liquid of first grade absorption tower and two-level absorption tower is all got with recycle pump, continuous circulation spray-absorption in tower is carried out after plate-type heat exchanger cooling, wherein the rare formaldehyde solution of two-level absorption tower redundance enters first grade absorption tower through branch road after regulating, as the supplementary absorption liquid of first grade absorption tower, first grade absorption tower product section then sends into formaldehyde medial launder through branch road.
The disclosed preferred embodiment of the present invention just sets forth the present invention for helping above.Preferred embodiment does not have all details of detailed descriptionthe, does not limit the embodiment that this invention is only described yet.Obviously, according to the content of this specification sheets, can make many modifications and variations.This specification sheets is chosen and is specifically described these embodiments, is to explain principle of the present invention and practical application better, thus makes art technician understand well and to utilize the present invention.The present invention is only subject to the restriction of claims and four corner and equivalent.
Claims (7)
1. a Formaldehyde Production system, is characterized in that, comprising:
Methanol feedstock tank, methyl alcohol tundish, methyl alcohol strainer, methyl alcohol reboiler, methanol evaporator, described methanol feedstock tank, methyl alcohol tundish, methyl alcohol strainer, methyl alcohol reboiler, methanol evaporator connect successively, described methanol feedstock tank provides methyl alcohol for described methyl alcohol tundish, then by methyl alcohol strainer, methyl alcohol is filtered, the bottom that methyl alcohol after filtration passes into described methyl alcohol reboiler is heated, described methyl alcohol is heating and gasifying in methyl alcohol reboiler, and the methyl alcohol of gasification passes into described methanol evaporator;
Quaternary mixing tank, methanol evaporator, airheater, vapor filter, heater exhaust gas, described methanol evaporator, airheater, vapor filter, heater exhaust gas are connected with described quaternary mixing tank respectively and provide methanol steam, warm air, steam and tail gas successively for described quaternary mixing tank, and described methanol steam, warm air, steam and tail gas form quaternary mixed gas in described quaternary mixing tank;
Strainer, oxidizer, described strainer one end is connected with described quaternary mixing tank, the described strainer the other end is connected with described oxidizer, quaternary mixed gas is passed into described strainer by described quaternary mixing tank, described strainer passes into described oxidizer after being filtered by quaternary mixed gas, described quaternary mixed gas in oxidizer with catalyst exposure and reacting by heating;
First absorption tower, second absorption tower, exhaust gas treating device, heater exhaust gas, formaldehyde tundish, described oxidizer is connected with described first absorption tower, described first absorption tower, second absorption tower, exhaust gas treating device connects successively, described first absorption tower is connected with formaldehyde tundish, the formaldehyde gas produced in described oxidizer is successively by described first absorption tower, second absorption tower absorbs, the tail gas produced is divided into two-way and passes into described exhaust gas treating device and heater exhaust gas, exhaust combustion is heated water generates steam by described exhaust gas treating device, described heater exhaust gas will pass into described quaternary mixing tank after tail gas heating, described second absorption tower by pump for described first absorption tower provides rare formaldehyde, the formaldehyde solution meeting concentration of formaldehyde pumps in described formaldehyde tundish and stores by described first absorption tower.
2. Formaldehyde Production system as claimed in claim 1, it is characterized in that, described methyl alcohol reboiler, airheater, vapor filter, heater exhaust gas heat respectively by steam, and described steam is generated by a drum.
3. Formaldehyde Production system as claimed in claim 2, it is characterized in that, described oxidizer has a quench zone, by cooling soft water, described quench zone is cooled, the hot water produced passes into described drum, described drum provides hot water for described exhaust gas treating device, and described exhaust gas treating device heats by combustion tail gas the steam that the hot water that passes into produces and passes into described drum.
4. Formaldehyde Production system as claimed in claim 3, is characterized in that, described drum by vapour distributor by steam distribution to described methyl alcohol reboiler, airheater, vapor filter, heater exhaust gas.
5. Formaldehyde Production system as claimed in claim 3, is characterized in that, then described quaternary mixed gas first enters oxidizer through spark arrester after purification, contacts at the temperature of about 650 DEG C with silver catalyst.
6. Formaldehyde Production system as claimed in claim 1, it is characterized in that, described methanol evaporator passes into described quaternary mixing tank after the mesh mist eliminator precipitation of liquid droplets at its top.
7. Formaldehyde Production system as claimed in claim 1, is characterized in that, normal temperature air is passed in described airheater after being filtered by an air filter.
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| CN201510808769.0A CN105294414A (en) | 2015-11-19 | 2015-11-19 | Formaldehyde production system |
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| CN201510808769.0A CN105294414A (en) | 2015-11-19 | 2015-11-19 | Formaldehyde production system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105732342A (en) * | 2016-03-25 | 2016-07-06 | 湖北三江化工有限责任公司 | Formaldehyde production method based on exhaust gas circulating process |
| CN107056593A (en) * | 2017-02-17 | 2017-08-18 | 唐山中浩化工有限公司 | A kind of production method and system of ultra-large formaldehyde |
| CN107200682A (en) * | 2017-07-12 | 2017-09-26 | 广东奕宏化工有限公司 | A kind of improved Formaldehyde Production system |
| CN107311848A (en) * | 2017-07-12 | 2017-11-03 | 安徽弘源化工科技有限公司 | One kind bypass oxygenation type formaldehyde preparation system |
| CN107382685A (en) * | 2017-07-12 | 2017-11-24 | 安徽弘源化工科技有限公司 | A kind of pipeline mixes oxygen formula formaldehyde preparation method |
| CN110041183A (en) * | 2019-05-15 | 2019-07-23 | 宜都市多邦化工有限公司 | The recycling system and method for dilute formaldehyde in a kind of production of paraformaldehyde |
| CN110759823A (en) * | 2019-09-23 | 2020-02-07 | 扬州市众鑫化工有限公司 | Preparation method of low-concentration formaldehyde solution for water-based binder |
| CN112479845A (en) * | 2020-11-09 | 2021-03-12 | 潍坊惠丰化工有限公司 | High-concentration formaldehyde production device and production process |
| CN112707803A (en) * | 2020-12-25 | 2021-04-27 | 国家能源集团宁夏煤业有限责任公司 | Method and system for preparing aldehyde by alcohol oxidation |
| CN113091338A (en) * | 2021-03-30 | 2021-07-09 | 漳州市龙文翰苑化工有限公司 | Reaction heat recycling system in formaldehyde production |
| CN113200827A (en) * | 2021-05-19 | 2021-08-03 | 宁夏华业精细化学科技有限公司 | Paraformaldehyde production process |
| CN113200838A (en) * | 2021-05-19 | 2021-08-03 | 宁夏华业精细化学科技有限公司 | Formaldehyde production process |
| CN113666811A (en) * | 2021-09-13 | 2021-11-19 | 盐城市春竹香料有限公司 | Method for preparing isovaleraldehyde by continuously catalyzing isoamyl alcohol to be oxidized through electrolytic silver |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105732342A (en) * | 2016-03-25 | 2016-07-06 | 湖北三江化工有限责任公司 | Formaldehyde production method based on exhaust gas circulating process |
| CN107056593A (en) * | 2017-02-17 | 2017-08-18 | 唐山中浩化工有限公司 | A kind of production method and system of ultra-large formaldehyde |
| CN107200682A (en) * | 2017-07-12 | 2017-09-26 | 广东奕宏化工有限公司 | A kind of improved Formaldehyde Production system |
| CN107311848A (en) * | 2017-07-12 | 2017-11-03 | 安徽弘源化工科技有限公司 | One kind bypass oxygenation type formaldehyde preparation system |
| CN107382685A (en) * | 2017-07-12 | 2017-11-24 | 安徽弘源化工科技有限公司 | A kind of pipeline mixes oxygen formula formaldehyde preparation method |
| CN110041183A (en) * | 2019-05-15 | 2019-07-23 | 宜都市多邦化工有限公司 | The recycling system and method for dilute formaldehyde in a kind of production of paraformaldehyde |
| CN110759823A (en) * | 2019-09-23 | 2020-02-07 | 扬州市众鑫化工有限公司 | Preparation method of low-concentration formaldehyde solution for water-based binder |
| CN112479845A (en) * | 2020-11-09 | 2021-03-12 | 潍坊惠丰化工有限公司 | High-concentration formaldehyde production device and production process |
| CN112707803A (en) * | 2020-12-25 | 2021-04-27 | 国家能源集团宁夏煤业有限责任公司 | Method and system for preparing aldehyde by alcohol oxidation |
| CN113091338A (en) * | 2021-03-30 | 2021-07-09 | 漳州市龙文翰苑化工有限公司 | Reaction heat recycling system in formaldehyde production |
| CN113091338B (en) * | 2021-03-30 | 2023-03-31 | 漳州市龙文翰苑化工有限公司 | Reaction heat recycling system in formaldehyde production |
| CN113200827A (en) * | 2021-05-19 | 2021-08-03 | 宁夏华业精细化学科技有限公司 | Paraformaldehyde production process |
| CN113200838A (en) * | 2021-05-19 | 2021-08-03 | 宁夏华业精细化学科技有限公司 | Formaldehyde production process |
| CN113666811A (en) * | 2021-09-13 | 2021-11-19 | 盐城市春竹香料有限公司 | Method for preparing isovaleraldehyde by continuously catalyzing isoamyl alcohol to be oxidized through electrolytic silver |
| CN113666811B (en) * | 2021-09-13 | 2024-04-30 | 盐城市春竹香料有限公司 | Method for preparing isopentyl aldehyde by continuously catalyzing isoamyl alcohol oxidation through electrolytic silver |
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Application publication date: 20160203 |