21 Jan 10 – It is reported that manganese market remains firm in China, and many inquiries are received and most smelters are fulfilling some orders singed before, however, consumers start to be cautious to buy more this week.
Asianmetal(English) http://www.asianmetal.com 254R
A Hunan-based manganese flake buyer, with an output of manganese briquette of 700-800tpm, reported to Asian Metal that manganese flake price is RMB15,600-15,700/t (USD2,284-2,299/t) ex works, and he does not want to replenish stocks for the moment at current price. "I heard that few smelters start to sell at RMB15,500/t (USD2,269/t) ex works on Tuesday. Although smelters received some inquiries, it is difficult for manganese flake price to go up," said the source.
Asianmetal(English) http://www.asianmetal.com 52P2
According to the source, even if some inquiries from overseas market are received, foreign consumers do not accept the price and no export deals are concluded. The source gave an offer for manganese flake USD2,850-2,900/t FOB and offers for manganese briquette USD2,400/t FOB.
Asianmetal(English) http://www.asianmetal.com MQ00
A Hunan-based manganese flake smelter, who has an output of 600tpm and usually buys 300t to process manganese ingot, reported to Asian Metal that he sold 100t manganese flake at RMB15,800/t (USD2,313/t) ex works, and many inquiries from consumers are received. He added that the trading volume is larger than before. "However, some smelters in Jishou start to sell at about RMB15,600/t (USD2,284/t) ex works, I think it is difficult for the price to rise further," said the source.
Asianmetal(English) http://www.asianmetal.com 4A4Y
According to the source, he still holds 400-500t stocks to maintain the process of manganese ingot, and is fulfilling some orders of manganese ingot with steel mills signed at RMB16,900/t (USD2,474/t) ex works.
Monday, January 25, 2010
Antimony trioxide,Antimony ingot prices jumping
Along with the antimony ingot price skyrocketing, the price of antimony trioxide has jumped rapidly in recent one week. Some producers reported that they have sold small batches of antimony trioxide at around RMB40,500-41,000/t (USD5,930-6,003/t) ex works late this week. Meanwhile, the export offer for the material has increased to USD6,100/t FOB China.
A major producer from South China, whose monthly output is around 300-400t at present, confirmed that they just concluded a small deal at RMB41,500/t (USD6,076/t) delivered to Shanghai, which is RMB500-1,000/t (USD73-146/t) higher than the price early this week. "I may not accept current price this week. The price of antimony trioxide is changing every day," the source added.
The source is also fulfilling some contracts signed in December at around RMB38,000/t (USD5,564/t) ex works. "I think the price will keep rocketing in the coming days, because the supply constraints have not alleviated at all," the source said, showing his confidence in the short-term market of antimony trioxide.
A supplier based in South China, who usually exports through trading companies, claimed that they are offering at USD6,100/t FOB China, and have sold some of the material at USD6,050/t FOB China this week, which is nearly USD200/t up compared with that early this month. "The price of antimony ingot is still on the rise which increase our production cost, so we have to lift our price accordingly," the source explained.
The source complained the spot availability of antimony ingot is rather limited, and they can not purchase enough material at one time. "I think the price of antimony trioxide will go on rising in the next few days before the holiday due to current market situation," the source said.
A major producer from South China, whose monthly output is around 300-400t at present, confirmed that they just concluded a small deal at RMB41,500/t (USD6,076/t) delivered to Shanghai, which is RMB500-1,000/t (USD73-146/t) higher than the price early this week. "I may not accept current price this week. The price of antimony trioxide is changing every day," the source added.
The source is also fulfilling some contracts signed in December at around RMB38,000/t (USD5,564/t) ex works. "I think the price will keep rocketing in the coming days, because the supply constraints have not alleviated at all," the source said, showing his confidence in the short-term market of antimony trioxide.
A supplier based in South China, who usually exports through trading companies, claimed that they are offering at USD6,100/t FOB China, and have sold some of the material at USD6,050/t FOB China this week, which is nearly USD200/t up compared with that early this month. "The price of antimony ingot is still on the rise which increase our production cost, so we have to lift our price accordingly," the source explained.
The source complained the spot availability of antimony ingot is rather limited, and they can not purchase enough material at one time. "I think the price of antimony trioxide will go on rising in the next few days before the holiday due to current market situation," the source said.
Tuesday, January 5, 2010
supply ammonium perrhenate
We can supply ammonium perrhenate in good quality.
Our Ammonium Perrhenate is a result of recycling process, which we make with Rhenium products. Our 10 years of experience in this business let us make Basic Grade Ammonium Perrhenate with quality and purity of Catalyst Grade, which makes our product more wanted in marked, but lower in price than Catalyst Grade.
We are always ready to start new partnership with companies who are willing to start long term work.
We can provide final material as Ammonium Perrhenate or recycle your material and provide you with product and Oxides of other metals.
Product Description
Our Ammonium Perrhenate is a result of recycling process, which we make with Rhenium products. Our 10 years of experience in this business let us make Basic Grade Ammonium Perrhenate with quality and purity of Catalyst Grade, which makes our product more wanted in marked, but lower in price than Catalyst Grade.
We are always ready to start new partnership with companies who are willing to start long term work.
We can provide final material as Ammonium Perrhenate or recycle your material and provide you with product and Oxides of other metals.
Product Description
AMMONIUM PERRHENATE
1. Appearance: White crystalline powder
2. Common uses: Manufacture of bimetallic PT/Re reforming catalyst, production of rhenium metal and production of perrhenic acid.
3. Chemical specifications:
NH4ReO4 99.99%min
Re 69.4%min
Otal metallic impurities: 100ppm max.
Metallic impurities content: (%, max)
K 0.0005 Na 0.0005 Ca 0.0005 Fe 0.0005
W 0.0005 Pb 0.0001 Cu 0.0001 Sn 0.0001
Ba 0.0001 Mn 0.0001 Be 0.0001 PT 0.0001
Co 0.0001 CD 0.0002 Cr 0.0001 Mg 0.0002
Zn 0.0002 Sb 0.0002 Al 0.0001 Mo 0.0005
Ni 0.0001 Ti 0.0001
4. Packing: Plastic bag inside, net each 1.0kg; Steel drum outside, net each 20-30kg.
AMMONIUM PERRHENATE
AMMONIUM PERRHENATE
1. Appearance: White crystalline powder
2. Common uses: Manufacture of bimetallic PT/Re reforming catalyst, production of rhenium metal and production of perrhenic acid.
3. Chemical specifications:
NH4ReO4 99.99%min
Re 69.4%min
Otal metallic impurities: 100ppm max.
Metallic impurities content: (%, max)
K 0.0005 Na 0.0005 Ca 0.0005 Fe 0.0005
W 0.0005 Pb 0.0001 Cu 0.0001 Sn 0.0001
Ba 0.0001 Mn 0.0001 Be 0.0001 PT 0.0001
Co 0.0001 CD 0.0002 Cr 0.0001 Mg 0.0002
Zn 0.0002 Sb 0.0002 Al 0.0001 Mo 0.0005
Ni 0.0001 Ti 0.0001
4. Packing: Plastic bag inside, net each 1.0kg; Steel drum outside, net each 20-30kg.
1. Appearance: White crystalline powder
2. Common uses: Manufacture of bimetallic PT/Re reforming catalyst, production of rhenium metal and production of perrhenic acid.
3. Chemical specifications:
NH4ReO4 99.99%min
Re 69.4%min
Otal metallic impurities: 100ppm max.
Metallic impurities content: (%, max)
K 0.0005 Na 0.0005 Ca 0.0005 Fe 0.0005
W 0.0005 Pb 0.0001 Cu 0.0001 Sn 0.0001
Ba 0.0001 Mn 0.0001 Be 0.0001 PT 0.0001
Co 0.0001 CD 0.0002 Cr 0.0001 Mg 0.0002
Zn 0.0002 Sb 0.0002 Al 0.0001 Mo 0.0005
Ni 0.0001 Ti 0.0001
4. Packing: Plastic bag inside, net each 1.0kg; Steel drum outside, net each 20-30kg.
METHOD FOR THE PRODUCTION OF AMMONIUM PERRHENATE
A method of manufacturing ammonium perrhenate which comprises carrying out the process of electrodialysis in a two-chamber electrodialysis apparatus furnished with a liquid diaphragm consisting of amyl, hexyl or heptyl alcohol, wherein the starting catholyte is a perrhenate ion-containing acidic solution and the starting anolyte consists of a IO-30 percent solution of ammonia, while the liquid diaphragm contains 0.05-0.1 percent by weight of 8-mercaptoquinoline.
There are known processes of manufacturing ammonium perrhenate by the ion exchange technique, or by extraction with tributyl phosphate and subsequent reextraction by ammonia, or by dissolving rhenium metal in nitric acid, followed by neutralizing the resultant solution with ammonia.
It is also known to manufacture ammonium perrhenate from molybdenum concentrate processing wastes by a method comprising recovering perrhenate ions from said wastes by sorption on an ion exchange resin at pH of 5-6, followed by desorbing said ions by means of ammonia solutions.
These prior art methods are disadvantageous in that they are multistage and laborious processes, and do not make it possible to obtain high-purity ammonium perrhenate, other disadvantages being the consumption of significant quantities of organic solvents for extraction of perrhenate ions, and the necessity of carrying out the preliminary step of molybdenum separation from molybdenum concentrate processing wastes in order to effectively extract perrhenate ions from said wastes by sorption on ion exchange resins.
It is the principal object of the present invention to provide a single-stage method for the production of high-purity ammonium perrhenate from a perrhenate ion-containing solution and ammonia.
In accordance with this and other objects, the present invention consists of a method comprising carrying out the process of electrodialysis in ...
A two-chamber electrodialysis apparatus incorporating a liquid diaphragm made from amyl, hexyl or heptyl alcohol, wherein the process of electrodialysis is preceded by placing a perrhenate ion-containing acidic solution into the cathode compartment, a 10-30percent ammonia solution into the anode chamber, and by incorporating 0.05-0.1 percent by weight of 8-mercaptoquinoline into the liquid diaphragm.
The present method for the production of high-purity ammonium perrhenate is illustrated by the accompanying diagram of the electrodialysis apparatus and realized in the following manner.
A perrhenate ion-containing acidic solution is charged into cathode compartment 1 of the electrodialysis apparatus, provision being made in said apparatus for partitions 2. A 10-30percent solution of ammonia is placed in anode compartment 3, followed by introducing into the apparatus a normal or branched aliphatic alcohol, selected from the group of alcohols specified hereinabove so as to form liquid diaphragm 4. Next, 0.05-0.1 percent by weight of a complexing agent, viz, 8-mercaptoquinoline, is incorporated into diaphragm viz., and electrodes 5 and 6 are connected to a power source, the electrodes being selected so that the area of cathode 5 will be significantly larger (by a factor of 5 to 10 ) than that of anode 6, whereby the reduction of perrhenate ions in the cathode compartment is avoided. The cathode may be fabricated from any metal, while the anode should be made of platinum.
The liquid diaphragm selectively extracts in the cathode compartment the perrhenate ions in the form of perrhenic acid, which undergoes partial dissociation in the organic phase (alcohol), and the resultant perrhenate ions diffuse, under the effect of the electric field applied, through the liquid diaphragm to the alcohol-ammonia solution interface in the anode compartment and form in the anode chamber ammonium perrhenate which accumulates in the ammonia solution.
8-Mercaptoquinoline contained in the liquid diaphragm forms complex compounds with heavy metal admixtures that penetrate into the diaphragm from the cathode compartment solution, said complexes being insoluble in water, but readily soluble in aliphatic alcohols. It is to be noted that perrhenate ions form under these conditions no complexes wutg 8-mercaptoquinoline and, therefore, travel from the cathode compartment to the anode compartment via the liquid diaphragm, while the admixtures of heavy metals are trapped by the diaphragm or deposited on the cathode. In the cathode compartment, the solution will ultimately contain the admixtures of alkali and alkaline earth metals (potassium, sodium, calcium, etc.).
The unification of such processes as the extraction of perrhenate ions, removal of impurities by 8-mercaptoquinoline and electrodialysis makes it possible to obtain a solution of high-purity ammonium perrhenate by a single-step procedure.
The ammonium perrhenate solution thus obtained is directed to the crystallization step in order to obtain the sought-for ammonium perrhenate or subjected, after an appropriate adjustment of the composition, to electrolysis with a view to producing rhenium metal.
For a better understanding of the present invention, the following examples of preparing ammonium perrhenate are given by way of illustration.
Description:
This invention relates to methods for the production of ammonium perrhenate, which finds application for the manufacture of powdered rhenium in a high state of purity. There are known processes of manufacturing ammonium perrhenate by the ion exchange technique, or by extraction with tributyl phosphate and subsequent reextraction by ammonia, or by dissolving rhenium metal in nitric acid, followed by neutralizing the resultant solution with ammonia.
It is also known to manufacture ammonium perrhenate from molybdenum concentrate processing wastes by a method comprising recovering perrhenate ions from said wastes by sorption on an ion exchange resin at pH of 5-6, followed by desorbing said ions by means of ammonia solutions.
These prior art methods are disadvantageous in that they are multistage and laborious processes, and do not make it possible to obtain high-purity ammonium perrhenate, other disadvantages being the consumption of significant quantities of organic solvents for extraction of perrhenate ions, and the necessity of carrying out the preliminary step of molybdenum separation from molybdenum concentrate processing wastes in order to effectively extract perrhenate ions from said wastes by sorption on ion exchange resins.
It is the principal object of the present invention to provide a single-stage method for the production of high-purity ammonium perrhenate from a perrhenate ion-containing solution and ammonia.
In accordance with this and other objects, the present invention consists of a method comprising carrying out the process of electrodialysis in ...
A two-chamber electrodialysis apparatus incorporating a liquid diaphragm made from amyl, hexyl or heptyl alcohol, wherein the process of electrodialysis is preceded by placing a perrhenate ion-containing acidic solution into the cathode compartment, a 10-30percent ammonia solution into the anode chamber, and by incorporating 0.05-0.1 percent by weight of 8-mercaptoquinoline into the liquid diaphragm.
The present method for the production of high-purity ammonium perrhenate is illustrated by the accompanying diagram of the electrodialysis apparatus and realized in the following manner.
A perrhenate ion-containing acidic solution is charged into cathode compartment 1 of the electrodialysis apparatus, provision being made in said apparatus for partitions 2. A 10-30percent solution of ammonia is placed in anode compartment 3, followed by introducing into the apparatus a normal or branched aliphatic alcohol, selected from the group of alcohols specified hereinabove so as to form liquid diaphragm 4. Next, 0.05-0.1 percent by weight of a complexing agent, viz, 8-mercaptoquinoline, is incorporated into diaphragm viz., and electrodes 5 and 6 are connected to a power source, the electrodes being selected so that the area of cathode 5 will be significantly larger (by a factor of 5 to 10 ) than that of anode 6, whereby the reduction of perrhenate ions in the cathode compartment is avoided. The cathode may be fabricated from any metal, while the anode should be made of platinum.
The liquid diaphragm selectively extracts in the cathode compartment the perrhenate ions in the form of perrhenic acid, which undergoes partial dissociation in the organic phase (alcohol), and the resultant perrhenate ions diffuse, under the effect of the electric field applied, through the liquid diaphragm to the alcohol-ammonia solution interface in the anode compartment and form in the anode chamber ammonium perrhenate which accumulates in the ammonia solution.
8-Mercaptoquinoline contained in the liquid diaphragm forms complex compounds with heavy metal admixtures that penetrate into the diaphragm from the cathode compartment solution, said complexes being insoluble in water, but readily soluble in aliphatic alcohols. It is to be noted that perrhenate ions form under these conditions no complexes wutg 8-mercaptoquinoline and, therefore, travel from the cathode compartment to the anode compartment via the liquid diaphragm, while the admixtures of heavy metals are trapped by the diaphragm or deposited on the cathode. In the cathode compartment, the solution will ultimately contain the admixtures of alkali and alkaline earth metals (potassium, sodium, calcium, etc.).
The unification of such processes as the extraction of perrhenate ions, removal of impurities by 8-mercaptoquinoline and electrodialysis makes it possible to obtain a solution of high-purity ammonium perrhenate by a single-step procedure.
The ammonium perrhenate solution thus obtained is directed to the crystallization step in order to obtain the sought-for ammonium perrhenate or subjected, after an appropriate adjustment of the composition, to electrolysis with a view to producing rhenium metal.
For a better understanding of the present invention, the following examples of preparing ammonium perrhenate are given by way of illustration.
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