Can mining experts withdraw cash
Publish: 2021-03-28 02:24:05
1.
the end of mining type is sooner or later, it's just a matter of time
2. If you rent computing power, the principal is lossless, and you get net income, which is many times higher than the income of yu'ebao. If the price of bitcoin rises, you can earn more, and the cost performance is quite high.
3. Mobile app is some routine, even if you can make money is a few cents a day
4. This can play, earn a little money or can, not earn much money
5. As for mining routes, they are easy to find.
the map indicates the grade.
you should dig according to 1-10
first, and then you can go to 10-20 if you don't have more experience.
and so on.
basically all maps have mines.
you'd better have flying mounts.
it's very fast
the map indicates the grade.
you should dig according to 1-10
first, and then you can go to 10-20 if you don't have more experience.
and so on.
basically all maps have mines.
you'd better have flying mounts.
it's very fast
6. How to get the silver coin? To complete this task, first of all, you need to do guild task in meow City, so that you can score 19 points.
7. Of course you can buy it! In fact, this kind of reliable project, as long as there is leisure capital, long-term holding and short-term speculation are very good
8. Now the whole brain is developing well in China, and many local brands are very professional
guiding the right brain has been done for more than ten years. My friend's children have learned it there, and the effect is OK. You can learn about it.
guiding the right brain has been done for more than ten years. My friend's children have learned it there, and the effect is OK. You can learn about it.
9. Brief introction of bis (Trichloromethyl) carbonate (solid phosgene)
I. physical and chemical properties of the proct
bis (Trichloromethyl) carbonate or trichloromethyl carbonate, English name is bis (Trichloromethyl) carbonate, abbreviation is (BTC) or triphosgene or carbon acid bis - (Trichloromethyl) ester or methyl trichloro carbonate, CAS accession number is 32315-10-9
the proct is a stable white crystal with melting point of 78-82 ℃ and boiling point of 203-206 ℃. Its molecular formula is co (occl3) 2, the molecular weight is 296.75, the specific gravity of solid is 1.78g/cm3, the specific gravity of molten state is 1.629g/cm3, the structural formula is as follows: (for convenience, the proct is expressed by BTC)
because - mole BTC can proce three moles of phosgene under certain conditions, it is also called "three phosgene", So it is also called "solid phosgene"
BTC is insoluble in water, but soluble in benzene, ethanol, ether, chloroform, tetrahydrofuran and other organic solvents. It decomposes when it meets with hot water and sodium hydroxide. BTC can react with alcohols, aldehydes, amines, amides, carboxylic acids, phenols, hydroxylamines and other compounds, as well as cyclization condensation to prepare heterocyclic compounds. In short, BTC can completely replace the highly toxic (banned) phosgene and diphosgene synthesis related chemical procts in chemical reactions
2. Safety and use method of the proct
1. This proct is a class II organic drug, CAS No. 32315-10-9, United solid No.: 2811, gb6944. Each table of dangerous goods belongs to class VI, No. 61908, class II organic poison, special provisions: 73
2. This proct is extremely stable at room temperature. It should be sealed and stored in a dry, cool and ventilated place. It is forbidden to mix with alkaline compounds
3. When using or contacting this proct, the operator should wear plastic coated gloves and gas mask, and the personnel should be at the air outlet as far as possible
4. In case of eye irritation or skin contact, rinse with clean water, take a rest in case of accidental ingestion or inhalation, and inject 20% and 20 ml of lotropine in case of oxygen inhalation or serious cases
when used, it depends on the specific reaction system. Generally speaking, if the system contains substances (organic amines, active carbon, organic bases) that initiate its decomposition, the reaction can proceed smoothly without any initiator. Otherwise, 1-5% (weight of the proct) of DMF or pyridine and other organic bases are added to the other phase (generally divided into two-phase reaction, one phase is solid phosgene solution, the other phase is substance reacting with phosgene), and the speed of dropping one phase to the other phase is controlled to control the speed of reaction. The solvents of solid phosgene are benzene, chloroform, dichloroalkane, cyclohexane and so on. This solvent should not be the one to initiate the decomposition of phosgene, while the solvent of the other phase should preferably be the one to initiate the decomposition of phosgene< (3) application of BTC (1) a series of carbamate pesticides, urea herbicides such as isoxalon and diuron, herbicides such as chlorpyrifos, oxadiazepine and oxadiazon can be prepared at the convenience of pesticides; In addition, a series of benzoylurea insecticides and sulfonylurea herbicides can be prepared< 2. In medicine, it is used as the intermediate of cimetidine, and as the intermediate of cefazolin, tetrachloroethanol. Synthesis of sleeping drug ampicillin carbon ester, non steroidal anti-inflammatory antihypertensive drugs and antihypertensive drugs. It can also synthesize antibacterials such as azoxicillin, piperacillin and cefoperazone, antidepressant and analgesic carbamazepine, and antiepileptic amipramine; It can also be used to prepare organic meat relaxant, chlorazoxal gland, etc< Thirdly, acyl chlorides, halides, special aldehydes and cyanides can be obtained in organic synthesis; In terms of dyes, it can replace phosgene to proce a variety of direct dyes, such as direct yellow, direct light fast red, scarlet alcohol, red based GC< 4,4-diphenyloxybenzophenone is an important intermediate for the proction of polymers. It can be used to prepare polyether, ether ketone (peer) with excellent chemical stability and thermal stability. It can be used to prepare carbonates, block copolymers, and TDI, TDI, TDI, TDI, TDI, TDI, TDI MDI and other monobasic or polybasic isocyanates are important monomers for the synthesis of polyurethane. It can also be used in the synthesis of rubber processing aids such as diethyl azodicarboxylate, diisopropyl ester and dibutyl ester< In recent years, BTC, as a new chemical raw material, has been widely used in organic synthesis
attachment: BTC 1 / 3 I + AB I is triphosgene
I. physical and chemical properties of the proct
bis (Trichloromethyl) carbonate or trichloromethyl carbonate, English name is bis (Trichloromethyl) carbonate, abbreviation is (BTC) or triphosgene or carbon acid bis - (Trichloromethyl) ester or methyl trichloro carbonate, CAS accession number is 32315-10-9
the proct is a stable white crystal with melting point of 78-82 ℃ and boiling point of 203-206 ℃. Its molecular formula is co (occl3) 2, the molecular weight is 296.75, the specific gravity of solid is 1.78g/cm3, the specific gravity of molten state is 1.629g/cm3, the structural formula is as follows: (for convenience, the proct is expressed by BTC)
because - mole BTC can proce three moles of phosgene under certain conditions, it is also called "three phosgene", So it is also called "solid phosgene"
BTC is insoluble in water, but soluble in benzene, ethanol, ether, chloroform, tetrahydrofuran and other organic solvents. It decomposes when it meets with hot water and sodium hydroxide. BTC can react with alcohols, aldehydes, amines, amides, carboxylic acids, phenols, hydroxylamines and other compounds, as well as cyclization condensation to prepare heterocyclic compounds. In short, BTC can completely replace the highly toxic (banned) phosgene and diphosgene synthesis related chemical procts in chemical reactions
2. Safety and use method of the proct
1. This proct is a class II organic drug, CAS No. 32315-10-9, United solid No.: 2811, gb6944. Each table of dangerous goods belongs to class VI, No. 61908, class II organic poison, special provisions: 73
2. This proct is extremely stable at room temperature. It should be sealed and stored in a dry, cool and ventilated place. It is forbidden to mix with alkaline compounds
3. When using or contacting this proct, the operator should wear plastic coated gloves and gas mask, and the personnel should be at the air outlet as far as possible
4. In case of eye irritation or skin contact, rinse with clean water, take a rest in case of accidental ingestion or inhalation, and inject 20% and 20 ml of lotropine in case of oxygen inhalation or serious cases
when used, it depends on the specific reaction system. Generally speaking, if the system contains substances (organic amines, active carbon, organic bases) that initiate its decomposition, the reaction can proceed smoothly without any initiator. Otherwise, 1-5% (weight of the proct) of DMF or pyridine and other organic bases are added to the other phase (generally divided into two-phase reaction, one phase is solid phosgene solution, the other phase is substance reacting with phosgene), and the speed of dropping one phase to the other phase is controlled to control the speed of reaction. The solvents of solid phosgene are benzene, chloroform, dichloroalkane, cyclohexane and so on. This solvent should not be the one to initiate the decomposition of phosgene, while the solvent of the other phase should preferably be the one to initiate the decomposition of phosgene< (3) application of BTC (1) a series of carbamate pesticides, urea herbicides such as isoxalon and diuron, herbicides such as chlorpyrifos, oxadiazepine and oxadiazon can be prepared at the convenience of pesticides; In addition, a series of benzoylurea insecticides and sulfonylurea herbicides can be prepared< 2. In medicine, it is used as the intermediate of cimetidine, and as the intermediate of cefazolin, tetrachloroethanol. Synthesis of sleeping drug ampicillin carbon ester, non steroidal anti-inflammatory antihypertensive drugs and antihypertensive drugs. It can also synthesize antibacterials such as azoxicillin, piperacillin and cefoperazone, antidepressant and analgesic carbamazepine, and antiepileptic amipramine; It can also be used to prepare organic meat relaxant, chlorazoxal gland, etc< Thirdly, acyl chlorides, halides, special aldehydes and cyanides can be obtained in organic synthesis; In terms of dyes, it can replace phosgene to proce a variety of direct dyes, such as direct yellow, direct light fast red, scarlet alcohol, red based GC< 4,4-diphenyloxybenzophenone is an important intermediate for the proction of polymers. It can be used to prepare polyether, ether ketone (peer) with excellent chemical stability and thermal stability. It can be used to prepare carbonates, block copolymers, and TDI, TDI, TDI, TDI, TDI, TDI, TDI MDI and other monobasic or polybasic isocyanates are important monomers for the synthesis of polyurethane. It can also be used in the synthesis of rubber processing aids such as diethyl azodicarboxylate, diisopropyl ester and dibutyl ester< In recent years, BTC, as a new chemical raw material, has been widely used in organic synthesis
attachment: BTC 1 / 3 I + AB I is triphosgene
10.
The answer is: there are several goals, one withdrawal and one withdrawal. It's hard. Good luck
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