CN1775787A - Method for synthesizing wolfram carbonyl from wolfram alloy waste - Google Patents
Method for synthesizing wolfram carbonyl from wolfram alloy waste Download PDFInfo
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- CN1775787A CN1775787A CN 200510124218 CN200510124218A CN1775787A CN 1775787 A CN1775787 A CN 1775787A CN 200510124218 CN200510124218 CN 200510124218 CN 200510124218 A CN200510124218 A CN 200510124218A CN 1775787 A CN1775787 A CN 1775787A
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Abstract
The invention belongs to the field of powder metallurgy, especially relating to a method for synthesizing tungsten carbonyl by tungsten alloy waste. The used raw material comprises in weight percent: Wu 25wt%-99wt%, Fe 1wt%-60wt%, and other impurity metals, and the particle size of the raw material is 5-50 mesh; and the method includes the following concrete steps of: holding the Fe-containing tungsten alloy waste into an synthesis kettle, using nitrogen gas to clean the air in the reaction system, starting raising the temperature and feeding in CO gas as reacting gas, making full reaction for 5-20 hours at temperature 150 deg.C-300 deg.C and at pressure 3-20 MPa to produce the tungsten carbonyl. As compared with the existing technique, the method has the advantages of simplicity in processing, safety in production, low price, raw material able to come from tungsten alloy waste, and higher synthetic extraction ratio.
Description
Technical field
The invention belongs to field of powder metallurgy, particularly a kind of method by the wolfram alloy waste synthesizing wolfram carbonyl.
Background technology
Tungsten carbonyl is a kind of important compound, and it is bringing into play important effect in a series of sciemtifec and technical sphere.In chemical catalysis field, adopt tungsten carbonyl catalysis phenylacetylene can high yield to obtain polyphenylacetylene, and replace carbene polymer has presented many novelties recently at aspects such as liquid-crystal display, gas-permeable, nonlinear opticses performance as this class new function of polyphenylacetylene than high molecular weight.Secondly, tungsten carbonyl is as the important carrier that carbonyl is provided in the chemosynthesis and as understanding the organometallics configuration, becoming the prototype of key situation and reactive behavior to have important use and theoretical value.The more important thing is, have the parts or the coating of special purpose by the carbonyl tungsten powder that the pyrolysis tungsten carbonyl is obtained.
The value although tungsten carbonyl has a wide range of applications, because the synthetic technology slower development of domestic tungsten carbonyl, tungsten carbonyl is difficult to buy at home, almost completely relies on import, not only cost an arm and a leg, and supply is little, thereby has limited its application greatly.
In the prior art, (В. Γ. С ы р к и н, К А Р Б О Н И Л Ъ Н Ы Е М Е Т А Л Л Ы, 1978) synthetic method of disclosed tungsten carbonyl mainly is to utilize the halogenide of tungsten in, by reductive agent (Zn, Na, Mg etc.), in solvent, carry out reduction reaction, the halogenide of tungsten is reduced into tungsten.Tungsten carries out building-up reactions with high-purity CO gas under certain temperature and pressure, generate tungsten hexacarbonyl (W (CO)
6).The process that obtains tungsten carbonyl can be described with following equation:
Adopt this method synthetic W of institute (CO)
6Synthetic ratio is 75%.In solvent, do not add zinc powder and use triethyl aluminum, can obtain tungsten carbonyl yet, at this moment, obtain W (CO)
6Can reach 85%.But, this danger that the method for synthetic tungsten carbonyl exists solvent to explode in solvent, in addition, this technology also has strict demand to original muriatic quality.The muriate of Bao Cuning has the trend of hydrolysis over a long time, makes that contained chlorine reduces in the muriate, becomes oxychloride.After forming oxychloride, the synthetic meeting of carbonyl compound reduces consumingly, and therefore, when the synthesizing carbonyl thing, it is fresh necessarily requiring, so muriatic date saved must not be above one month.As seen, this method of synthesizing wolfram carbonyl is not only to the ingredient requirement strictness in solvent, and dangerous big, but also need carry out operation such as solvent removal to product, whole technology is comparatively complicated.
Summary of the invention
The object of the present invention is to provide that a kind of technology is simple, production safety, cheap, raw material can derive from wolfram alloy waste, the production method of the wolfram alloy waste synthesizing wolfram carbonyl of higher synthetic extraction yield.
According to above-mentioned purpose, technical scheme of the present invention is:
The raw materials used chemical composition (weight %) of this method is: tungsten 25～99%, and iron 1～60%, surplus is other metallic impurity, raw material granularity is 5～50 orders;
This method comprises following concrete steps: above-mentioned ferruginous wolfram alloy waste being packed in the synthesis reactor,, begin to heat up and feed CO (carbon monoxide converter) gas as reaction gas after the air Ex-all in the reaction system with nitrogen, is 150～300 ℃ in temperature of reaction; Reaction pressure is 3～20MPa, fully reacts under the condition that continues 5～20 hours, generates tungsten carbonyl.
The chemical equation of above-mentioned reaction is:
The other technical scheme of the present invention is: if the raw material that adopted iron content not itself then can achieve the goal by adding thin iron powder, the thin iron particle size that is added is 150～200 orders.
The principle of work of technique scheme is:
Raw material of the present invention is a wolfram alloy waste, as long as this waste material contains a certain proportion of W elements and ferro element just can meet the demands, whether the existence of other element is not had any requirement.And when not containing ferro element in the raw material, can add the raw material of a certain amount of iron powder to obtain to meet the demands.Therefore when adopting method synthesizing wolfram carbonyl of the present invention, every raw material that contains W elements all can use, and this is very beneficial for the recycling of tungsten waste, has saved resource, and in resource deficient day by day today, this point is vital.Compare with the solvent synthesis method that necessarily requires fresh tungsten chloride to make raw material, outstanding advantage is arranged.
In the wolfram alloy waste of described ferruginous wolfram alloy waste or interpolation iron powder, iron plays a part reductive agent.This with the method for iron as reductive agent, the zinc powder that is adopted in the replacement solvent synthesis method, be characterized in: in existing most tungsten wastes, self contains ferro element.This mainly is because the tungsten fusing point is high, in prepare tungstenalloy goods process with powder metallurgic method, all will add a certain amount of nickel, iron (or copper) as the bonding phase.Because the tungstenalloy goods are quite high to density requirements, in case density does not reach requirement, just become waste product, even it is also of no avail to melt down sintering again.Be to be interspersed with the dead meal of this series products advantage as the iron and the W elements of reductive agent as the raw material of synthesizing wolfram carbonyl, guaranteeing in the oxo-process can not only reductive agent without interruption, can also constantly expose fresh tungsten active surface, thereby building-up reactions can thoroughly be carried out, reach the high extraction of W elements.And when self does not contain ferro element in the raw material, iron powder and the raw material additionally dosed are mixed.Certainly, when adopting this dependence to add iron powder as the method synthesizing wolfram carbonyl of reductive agent, the extraction yield of W elements is lower than the extraction yield of tungsten in above-mentioned self iron content element raw material.
The present invention compared with prior art have the object of the present invention is to provide that a kind of technology is simple, production safety, cheap, raw material can derive from wolfram alloy waste, the advantage of higher synthetic extraction yield.Raw material is cheap and easy to get and need not carry out pre-treatment, not only helps resource circulation and utilizes, also greatly reduces production cost.As reductive agent,, thereby simplified technology with resourceful iron because of most raw materials self contain iron.Even, add the also simple and easy handling of iron powder operation when raw material not during iron content.Because the present invention adopts dry method synthetic, thereby does not exist the danger of solvent blast, improved the security of producing.
Embodiment
The raw materials used chemical composition according to the present invention adopts synthetic method of the present invention, has synthesized 5 batches of tungsten carbonyls.Wherein table 1 is the chemical composition table of the used CO gas of the present invention, and 2 are the raw materials used chemical composition table of the present invention, and table 3 is the processing step and the process parameter table of synthetic method of the present invention.Sequence number 1-5# is the embodiment of the invention in the above-mentioned tabulation.
Table 1 is the chemical composition table (volume %) of the used CO gas of the present invention
| The chemical constitution volume percent of CO (carbon monoxide converter) gas | ||||
| CO | H 2 | O 2 | H 2O | CO 2 |
| 96～98 | 1.5-3.2 | 0.05～0.1 | 0.1～0.5 | 0.2～0.3 |
Table 2 is the raw materials used chemical composition table (weight %) of the present invention
| Sequence number | W ％ | Fe ％ | Other foreign metal % | Thin iron powder % | Raw material granularity (order) |
| 1 | 30 | 2 | 63 | / | 40～50 |
| 2 | 65 | 30 | 5 | / | 40～50 |
| 3 | 95 | 2 | 3 | / | 5～40 |
| 4 | 95 | / | 3 | 2 (200 orders) | 5～40 |
| 5 | 97 | / | 1 | 2 (200 orders) | 40～50 |
Table 3 is the processing step and the process parameter table of synthetic method of the present invention.
| Sequence number | Temperature of reaction ℃ | Reaction pressure MPa | Reaction times h | Synthetic extraction yield % |
| 1 | 180 | 20 | 20 | 78 |
| 2 | 250 | 15 | 18 | 82.5 |
| 3 | 280 | 18 | 20 | 81 |
| 4 | 250 | 10 | 12 | 85 |
| 5 | 220 | 17 | 12 | 86 |
Claims (2)
1, a kind of method by the wolfram alloy waste synthesizing wolfram carbonyl is characterized in that:
The raw materials used chemical composition (weight %) of this method is: tungsten 25～99%, and iron 1～60%, surplus is other foreign metal, raw material granularity is 5～50 orders;
This method comprises following concrete steps: above-mentioned ferruginous wolfram alloy waste is packed in the synthesis reactor, with nitrogen with after the air Ex-all in the reaction system, begin intensification and feed CO (carbon monoxide converter) gas as reaction gas, in temperature of reaction is 150～300 ℃, reaction pressure is 3～20MPa, fully react under the condition that continues 5～20 hours, generate tungsten carbonyl.The chemical equation of above-mentioned reaction is:
2, the method by ferrotungsten waste material synthesizing wolfram carbonyl according to claim 1 is characterized in that: can not achieve the goal by adding thin iron powder if the raw material itself that is adopted does not contain iron rule, the thin iron particle size that is added is 150～200 orders.
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| CNB2005101242189A CN1332965C (en) | 2005-11-29 | 2005-11-29 | Method for synthesizing wolfram carbonyl from wolfram alloy waste |
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|---|---|---|---|
| CNB2005101242189A CN1332965C (en) | 2005-11-29 | 2005-11-29 | Method for synthesizing wolfram carbonyl from wolfram alloy waste |
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| CN1775787A true CN1775787A (en) | 2006-05-24 |
| CN1332965C CN1332965C (en) | 2007-08-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070180A (en) * | 2010-12-07 | 2011-05-25 | 吉林吉恩镍业股份有限公司 | Method for synthesizing hexacarbonyl tungsten or molybdenum complex |
| CN102173447A (en) * | 2010-12-20 | 2011-09-07 | 钢铁研究总院 | Method for directly synthesizing metal (tungsten or molybdenum) carbonyl complex from tungsten oxide or molybdenum oxide |
| TWI636985B (en) * | 2015-03-06 | 2018-10-01 | 恩特葛瑞斯股份有限公司 | High-purity tungsten hexacarbonyl for solid source delivery |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU509539A1 (en) * | 1974-03-25 | 1976-04-05 | Институт Химической Кинетики Игорения Сибирского Отделения Ан Ссср | Method for producing tungsten carbonyl |
| SU1110784A1 (en) * | 1982-06-16 | 1984-08-30 | Институт новых химических проблем АН СССР | Process for preparing substituted molybdenum or tungsten carbonyls |
-
2005
- 2005-11-29 CN CNB2005101242189A patent/CN1332965C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070180A (en) * | 2010-12-07 | 2011-05-25 | 吉林吉恩镍业股份有限公司 | Method for synthesizing hexacarbonyl tungsten or molybdenum complex |
| CN102173447A (en) * | 2010-12-20 | 2011-09-07 | 钢铁研究总院 | Method for directly synthesizing metal (tungsten or molybdenum) carbonyl complex from tungsten oxide or molybdenum oxide |
| TWI636985B (en) * | 2015-03-06 | 2018-10-01 | 恩特葛瑞斯股份有限公司 | High-purity tungsten hexacarbonyl for solid source delivery |
| US10526697B2 (en) | 2015-03-06 | 2020-01-07 | Entegris, Inc. | High-purity tungsten hexacarbonyl for solid source delivery |
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| Publication number | Publication date |
|---|---|
| CN1332965C (en) | 2007-08-22 |
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