| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Process for separating polyethylene terephthalate from polyvinyl chloride | US697857 | 1991-05-09 | US5120768A | 1992-06-09 | Edwin A. Sisson |
| Today there is a growing demand to recycle plastics including polyethylene terephthalate. Sources of polyethylene terephthalate for recycling often contain polyvinyl chloride. It is necessary to separate polyvinyl chloride from the polyethylene terephthalate before it can be recycled into useful products. This invention reveals a process for recovering polyethylene terephthalate flakes from a recycle stream containing polyethylene terephthalate flakes and polyvinyl chloride flakes which comprises: (1) treating the recycle stream with (a) at least one inorganic base selected from the group consisting of sodium hydroxide and potassium hydroxide and (b) at least one nonionic surfactant under conditions and for a time sufficient to decrease the contact angle of the polyethylene terephthalate flakes with water below a value of 25.degree. while maintaining the contact angle of the polyvinyl chloride flakes above a value of about 45.degree.; (2) adding the treated recycle stream to water, to form an aqueous mixture containing the treated polyethylene terephthalate flakes and treated polyvinyl chloride flakes; (3) agitating the aqueous mixture to allow the polyvinyl chloride flakes to come in contact with gas bubbles; (4) allowing the polyvinyl chloride flakes to float to the surface of the aqueous mixture and allowing the polyethylene terephthalate flakes to sink to the bottom of the aqueous mixture; and (5) removing the polyvinyl chloride flakes from the surface of the aqueous mixture and removing the polyethylene terephthalate flakes from the bottom of the aqueous mixture. | ||||||
| 142 | Method for achieving enhanced copper flotation concentrate grade by oxidation and flotation | US626825 | 1990-12-13 | US5110455A | 1992-05-05 | Richard O. Huch |
| The present invention involves a method for separating copper sulfide from rimmed iron sulfide by flotation. Prior to flotation, a slurry containing the sulfides is oxidized and conditioned to achieve a pH greater than pH 9. Thereafter, the slurry is subjected to a froth floatation process by which a copper sulfide, such as chalcopyrite, concentrate is recovered. | ||||||
| 143 | Process for removing fine particles from a powder | US506937 | 1990-04-09 | US5066387A | 1991-11-19 | Marshall E. Deutsch |
| A process for removing finer than uniform size particles from a powder in a container including the steps of suspending the finer particles in a liquid rinse containing a charged compound such as a quanternary ammonium compound to reduce the static attraction of the finer particles from being bound to larger particles allowing the large particles to settle and decanting the suspensed finer particles in the liquid. | ||||||
| 144 | Process for removing pyritic sulfur from bituminous coals | US230139 | 1988-08-09 | US4966608A | 1990-10-30 | Wanda Pawlak; Jerzy S. Janiak; Ali A. Turak; Boleslaw L. Ignasiak |
| A process is provided for removing pyritic sulfur and lowering ash content of bituminous coals by grinding the feed coal, subjecting it to micro-agglomeration with a bridging liquid containing heavy oil, separating the microagglomerates and separating them to a water wash to remove suspended pyritic sulfur. In one embodiment the coal is subjected to a second micro-agglomeration step. | ||||||
| 145 | Process for beneficiating coal by means of selective agglomeration | US117630 | 1987-11-05 | US4776859A | 1988-10-11 | Nello Passarini; Antonio Vettor |
| A process is disclosed for the beneficiation of coal by means of selective agglomeration, wherein an agglomerating blend is used, which is constituted by:one or more main agglomerating agent(s), selected from the light hydrocarbons having a boiling temperature not higher than 70.degree. C.,one or more non-ionic additive(s), selected from oil-soluble ethoxylated compounds;one or more heavy co-agglomerating agent(s) selected from oils deriving from the distillation of coal-tar, having a boiling temperature comprised within the range of from 200.degree. to 400.degree. C. or the residual products from oil processing or blends thereof. | ||||||
| 146 | Method for separating coal particles from an aqueous slurry | US880343 | 1986-06-25 | US4734206A | 1988-03-29 | Eric J. Clayfield; Peter Sant |
| The invention relates, in one embodiment, to a method for separating coal particles from an aqueous slurry in which a multiple emulsion of oil in water is added to the aqueous slurry, the mixture is agitated to form agglomerates of coal particles, and the coal particles are separated from the remaining aqueous slurry. By the use of a multiple emulsion of oil in water, the amount of coal recovered per unit weight of oil is increased. | ||||||
| 147 | Process for the selective agglomeration of sub-bituminous coal fines | US628710 | 1984-07-09 | US4726810A | 1988-02-23 | Boleslaw Ignasiak |
| The process involves adding a low quality oil to an aqueous slurry of sub-bituminous coal particles to act as a selective agglomerating agent. When the mixture is agitated, as by pumping it through a pipeline loop, the coal particles agglomerate and may later be separated from the minerals by screening. The low quality oil used is selected from the group consisting of bitumen, heavy oil, and emulsions thereof. In a preferred aspect, a light hydrocarbon diluent, selected from the group consisting of kerosene, naphtha, and diesel oil, is added to improve the agglomeration results. | ||||||
| 148 | Process for the separation of solid particulate matter | US913498 | 1986-09-30 | US4725358A | 1988-02-16 | Kavssery P. Ananthapadmanabhan; Errol D. Goddard |
| This invention relates to a process for the separation and recovery of particulate matter having an average diameter of about 1 micron or less through the use of aqueous hi-phase systems and the modification of the surface properties of the particulate matter through use of a surfactant to modify its tendency to selectively migrate to one phase of the bi-phase system. | ||||||
| 149 | Pretreatment by alkaline wetting and holding at temperature of natural materials having an argillaceous gangue containing combustible elements | US894519 | 1986-08-08 | US4702820A | 1987-10-27 | Pierre-Bernard Personnet; Jean-Michel Philbert |
| Process for pretreatment at atmospheric pressure or a pressure close to atmospheric pressure by alkaline wetting and holding at temperature of natural materials whose gangue comprises argillaceous compounds capable of forming a stable plastic suspension in the presence of water and containing at least one combustible element which can be put into useful form wherein, in order to permit subsequent easy operations for separation of the liquid aqueous and solid phases of the gangue:(a) the natural material which was possibly been subjected to a preliminary drying operation is brought into intimate contact with at least 4 kg expressed in terms of OH.sup.- of at least one alkaline agent per ton of clay contained in said material, the total volume of liquid present in the natural material after the contacting operation being such that the ratio L/S of said volume expressed in terms of cubic meters to the weight of solid expressed in tons of dry ore is at most equal to 0.6; and(b) the natural material when wetted in that way is subjected to a pretreatment temperature that is suited to the nature of the combustible element and which is at most equal to 150.degree. C., for a period of time of at least 30 minutes. | ||||||
| 150 | Process for separating mineral ultra-fine grain from washings obtained in coal processing or from coal slurries | US741765 | 1985-06-06 | US4618414A | 1986-10-21 | Hans-Georg Hartan; Werner Padberg; Dietrich Muller |
| The invention relates to a process for separating mineral finest grain from coal slurries or washings obtained in coal processing, by treating the washing with a selective anionic dispersing agent for the finest grain, having a molecular weight of .ltoreq.10000 g/mol, and subsequent selective flocculation of the coal by means of a flocculating agent known per se. | ||||||
| 151 | Recovery of metal values from mineral ores by incorporation in coal-oil agglomerates | US690495 | 1984-12-10 | US4585548A | 1986-04-29 | Mark D. Cadzow; Graham J. Elkes; Gavin J. Ewin; David E. Mainwaring |
| Gold ore, or any other mineral treated to have a lyophilic surface, (e.g. chalcopyrites), is ground into a slurry in crusher (1) powdered coal and oil are added at location (2), and the mix is conveyed to a contact zone (3), where any micro-agglomerates formed are kept below 500 microns in size. Sequentially, the mix is passed to an agglomeration zone (4), where larger agglomerates of coal-oil and gold or the lyophilic mineral are allowed to form, then separated at (5) from the gangue (8), and recycle continuously via return line (6) and homogenister (7) to the contact zone (3), until a desired gold or mineral concentration in the agglomerates is achieved. Subsequently, the `loaded` coal-oil agglomerates are tapped off the return line (6) at (9), either batchwise or continuously, and the metal values are recovered by pyrometallurgical or concentional separation techniques. | ||||||
| 152 | Process for removing sulfur and ash from coal | US598979 | 1984-04-16 | US4537599A | 1985-08-27 | Edward H. Greenwald, Sr. |
| A process is disclosed for removing sulfur and ash, particularly clay and pyrite from coal particles having a mesh size of 30 or less. A slurry of coal particles is agitated in an ultrasonic mixer to separate the contaminants from the coal and weaken chemically-bonded contaminants on the coal surface. The clay and pyrite particles are dispersed as a colloid in the aqueous medium of the slurry. Treatment of the slurry with sonic energy also subdivides the particles along ash or clay seams. The slurry is then separated in a centrifuge and in froth-flotation cells so that coal particles greater than 2 microns are recovered and a slurry is again formed. The repulped slurry is then treated with sonic energy and ozone to release further quantities of surface components from the coal particles. The slurry is again treated in a centrifuge and coal particles 2 microns and greater are recovered. The slurry is normalized before each treatment with sonic energy and ozone to a pH of 6-9 to maintain the released contaminants as colloids suspended in the aqueous medium of the slurry. | ||||||
| 153 | Ore beneficiation process | US541765 | 1983-10-13 | US4514288A | 1985-04-30 | Ross A. Kremer; Stephen W. Saunders |
| By dispersing a clay-containing mineral matrix in an aqueous solution of EDTA before washing or classifying the ore, one obtains a system in which the subsequently formed clays consolidate at an unexpectedly high rate and to a higher final density. | ||||||
| 154 | Oil shale beneficiation | US386201 | 1982-06-07 | US4506835A | 1985-03-26 | Shirley C. Tsai |
| There is provided a process for the beneficiation of oil shale comprising comminuting oil shale to a maximum particle size that maximizes the separation efficiency index of a physical separation method at a predetermined product yield. The oil shale particles are then separated into organic-rich product and organic-lean refuse by the physical separation methods in which the product yield is adjusted to maximize the separation efficiency index of the separation. Preferred physical separation methods include gravity separation, hydraulic separation by tabling, froth flotation and oil agglomeration. | ||||||
| 155 | Method for de-ashing and transportation of coal | US366996 | 1982-04-09 | US4455148A | 1984-06-19 | Kenichi Nagata; Shigeru Nagamori; Yuuichi Katoh; Katsumi Satoh; Takashi Yano |
| A method for de-ashing crushed coal and transporting it in the form of pellets, said method comprising the following steps:A. the step of mixing pulverized coal with a binder to cover the surfaces of coal particles with the binder;B. the step of adding water to the pulverized coal;C. the step of stirring the slurry to disperse ash particles in the pulverized coal into water and to agglomerate coal particles in the pulverized coal by tumbling, whereby forming pelletized coal; andD. the step of separating the pelletized coal from the ash particles, and transporting the pelletized coal.The above basic four steps may be combined with the following steps depending on the state and particle size of raw coal:E. the step of crushing raw coal and separating it into high-ash coal and purified crushed coal, and further pulverizing the purified crushed coal and supplying the resulting powder to the above step A; andF. the step of separating by gravity separation the pellets obtained in the above step D into high-ash pellets and purified pellets, and transporting the resulting purified pellets. | ||||||
| 156 | Process for producing high brightness clays utilizing magnetic beneficiation and calcining | US406074 | 1982-08-06 | US4419228A | 1983-12-06 | Jerry A. Cook; Gary L. Cobb |
| A method is disclosed for separating titaniferous and ferruginous discolorants from a crude kaolin clay. A dispersed aqueous slurry of the clay is formed containing a deflocculant and a fatty acid collecting agent, and the slurry is conditioned to coat the discolorants with the collecting agent to thereby render the discolorants hydrophobic. A system of sub-micron sized magnetic ferrite seeding particles, the surfaces of which have been rendered hydrophobic, is thereupon added to the slurry. The seeded slurry is mixed to coalesce the hydrophobic-surfaced discolorants with the hydrophobic-surfaced seeding particles, and the slurry is then subjected to a froth flotation, which removes substantial quantities of the discolorants and seeding partices coalesced therewith, and also removes excess seeding particles and excess collecting agent. The floatation-beneficiated slurry is then subjected to a magnetic separation by passing the slurry through a porous ferromagnetic matrix positioned in a magnetic field, having an intensity of at least 0.5 kilogauss, to remove further quantities of the discolorants and seeding particles associated therewith, and to remove seeding particles unassociated with said discolorants. The product from said magnetic separation may then be calcined at a temperature of at least 1500.degree. F. to yield an exceptionally high brightness, low abrasion product. | ||||||
| 157 | Method for producing agglomerate particles from an aqueous feed slurry comprising finely divided coal and finely divided inorganic solids | US374838 | 1982-05-05 | US4415337A | 1983-11-15 | Helmuth W. Kutta; Donald K. Wunderlich |
| An improved method for producing coal agglomerates from an aqueous feed slurry containing finely divided coal and finely divided inorganic solids, the method consisting essentially of mixing a quantity of oil equal to from about 25 to about 75 percent of the oil required to produce the coal agglomerates with the aqueous slurry; thereafter mixing a quantity of an aqueous solution of a suitable polymeric material in an amount sufficient to agglomerate the finely divided coal with the aqueous slurry; and recovering the coal agglomerates. | ||||||
| 158 | Method for beneficiation of phosphate rock | US330300 | 1981-12-14 | US4388180A | 1983-06-14 | Andrew Rainis |
| A process is disclosed which removes gangue minerals from phosphate rock by forming an aqueous slurry of phosphate rock and its impurities, then using a low boiling, nonpolar, water insoluble, bridging hydrocarbon to selectively agglomerate the phosphates. | ||||||
| 159 | Sorting of ores with detectable compounds | US100618 | 1979-12-05 | US4347125A | 1982-08-31 | Peter M. Di Giacomo |
| A process for separating ore particles from gangue particles comprises the steps of (1) conditioning the particles with an agent comprising a compound having both a surface-selective functional group and a detectable moiety, to selectively coat either the ore particles or the gangue particles, to the substantial exclusion of the other; (2) detecting the coated particles; and (3) separating the detected, coated particles from the substantially uncoated particles. In one embodiment, the detectable moiety is fluorescent and detecting is performed under ultraviolet radiation. | ||||||
| 160 | Process for recovering fine coal particles from slurry of finely divided coal | US251700 | 1981-04-07 | US4346010A | 1982-08-24 | Etsuo Ogino; Nobuo Yoshii; Kazuo Harada |
| Fine coal particles are recovered from a slurry of finely divided coal by mixing coarsely divided coal and a binder together to cause the binder to adhere to the surfaces of the coarsely divided coal pieces, mixing the slurry with the coal pieces having the binder adhered thereto to cause fine coal particles to adhere to the binder over the surfaces of the coal pieces serving as nuclei and thereby form agglomerates, and separating the agglomerates from the remaining slurry portion to recover the fine coal particles along with the coarsely divided coal and the binder. | ||||||
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