摘要:
This invention relates to particulate and/or liquid droplet separation processes from liquids containing the same and the use of specific chemical additives to control surface wetting, hydrophobicity and surface forces in such processes.
摘要:
The present invention relates to a process for preparing 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine and the intermediates thereof. The present invention provides a compound represented by formula I and a compound represented by formula II, and processes for preparing 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine by using the compound represented by formula I, the compound represented by formula II and o-nitrobenzaldehyde. The invention has the advantages of the shorter synthesis steps, easily available raw materials and simple operation. Moreover, the process is economic and safe by avoiding the use of expensive and dangerous lithium aluminum hydride.
摘要:
A method is taught for producing freely draining flocculated sediment from a suspension comprising finely divided solids in water. The method comprises dispersing, at increasing concentrations, a charged particle hybrid polymer (CPHP) flocculant into the suspension to determine a minimum concentration of CPHP flocculant above which a freely draining flocculated sediment is produced that has a minimum permeability of 1 Darcy. Then, the concentration of dispersed CPHP flocculant in the suspension is maintained at or above the minimum concentration.A method is further provided for separating fine solids and water from a suspension comprising finely divided solids in water. The method involves dispersing, at increasing concentrations, a charged particle hybrid polymer (CPHP) flocculant into the suspension to determine a minimum concentration of CPHP flocculant above which a freely draining flocculated sediment is produced that has a minimum permeability of 1 Darcy. Then, the concentration of dispersed CPHP flocculant in the suspension is maintained at or above the minimum concentration. The dispersion of CPHP flocculant in the suspension is agitated and the solid floccules are then separated from the supernatant liquid.
摘要:
A charged particle polymer hybrid (CPPH) flocculant is taught, comprising sub-micron size charged particles and a polymer which has been polymerized in the presence of the charged particles wherein the intrinsic viscosity of the hybrid polymer flocculant is less than 930 ml/g. A method is provided for producing freely draining flocculated sediment from a suspension comprising finely divided solids in water. The method comprises dispersing, at increasing concentrations, a charged particle polymer hybrid (CPPH) flocculant into the suspension to determine a starting plateau concentration of CPPH flocculant above which concentration no further increase in the solids loading of the produced floccules is observed. Then, the concentration of dispersed CPPH flocculant in the suspension is maintained at or above the starting plateau concentration. A method is further provided for separating fine solids and water from a suspension comprising finely divided solids in water. The method involves dispersing, at increasing concentrations, a charged particle polymer hybrid (CPPH) flocculant into the suspension to determine a starting plateau concentration of CPPH flocculant above which concentration no further increase in the solids loading of the produced floccules is observed. Then, the concentration of dispersed CPPH flocculant in the suspension is maintained at or above the starting plateau concentration. The dispersion of CPPH flocculant in the suspension is agitated and the solid floccules are then separated from the supernatant liquid.
摘要:
This invention relates to particulate and/or liquid droplet separation processes from liquids containing the same and the use of specific chemical additives to control surface wetting, hydrophobicity and surface forces in such processes.
摘要:
The present invention relates to a method for preparing 6-substituted amino-3-cyanoquinoline compounds (compound A for short) and the intermediates thereof, more particularly, to a compound of the following formula (I), the preparation method thereof, the intermediates thereof and use thereof for preparing the compound A. The compound of the formula (I) is cyclized in the presence of an alkali to give a compound of formula A, wherein W is OH; or the compound of the formula (I) is cyclized in the presence of an alkali, and then chlorinated to give a compound of the formula A, wherein W is Cl. Compared with the known methods in the literature, the method for preparing the compound A from the compound of formula (I) according to the present invention can avoid using high-temperature condition and high boiling point solvents, and is safe and environment-friendly, mild in reaction condition, easy in operation with a high yield and high product purity.
摘要:
The present invention relates to a method for preparing 6-substituted amino-3-cyanoquinoline compounds (compound A for short) and the intermediates thereof, more particularly, to a compound of the following formula (I), the preparation method thereof, the intermediates thereof and use thereof for preparing the compound A. The compound of the formula (I) is cyclized in the presence of an alkali to give a compound of formula A, wherein W is OH; or the compound of the formula (I) is cyclized in the presence of an alkali, and then chlorinated to give a compound of the formula A, wherein W is Cl. Compared with the known methods in the literature, the method for preparing the compound A from the compound of formula (I) according to the present invention can avoid using high-temperature condition and high boiling point solvents, and is safe and environment-friendly, mild in reaction condition, easy in operation with a high yield and high product purity.
摘要:
The present invention relates to a process for preparing 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine and the intermediates thereof. The present invention provides a compound represented by formula I and a compound represented by formula II, and processes for preparing 4-acetyl-2,3,4,5-tetrahydro-benzo[1,4]diazepine by using the compound represented by formula I, the compound represented by formula II and o-nitrobenzaldehyde. The invention has the advantages of the shorter synthesis steps, easily available raw materials and simple operation. Moreover, the process is economic and safe by avoiding the use of expensive and dangerous lithium aluminum hydride.
摘要:
A method of improving hydrocarbon recovery from oil sands, oil shale, and petroleum residues includes adding a polymeric or nonpolymeric processing aid capable of sequestering cations, such as the multivalent calcium, magnesium and iron cations. The hydrocarbons are preferably contacted with the processing aid before a primary separation of the hydrocarbons in order to increase bitumen recovery. A processing aid is provided in an effective amount to increase the liberation of the hydrocarbons from inorganic solids, particularly when the source is a poor processing ore. Preferred processing aids include citric acid or a polymeric acid selected from polyacrylic acid, polymethacrylic acid, salts of these acids, partial salts of these acids, and combinations thereof. The processing aids significantly increase the hydrocarbon recovery typically with concentrations less than 50 ppm and the polymeric processing aids can also provide beneficial flocculation of solids in tailings slurry.