162 results about "Sulfur product" patented technology

A gas (1) comprising hydrogen sulfide, carbon dioxide, and hydrocarbon contaminants is treated in a plant (FIG. 2) in a configuration in which waste streams are recycled to extinction. In especially preferred aspects of contemplated methods and configurations, hydrogen sulfide and other sulfurous components are converted to a sulfur product (37), carbon dioxide (44A) is separated at a purity sufficient for enhanced oil recovery or sale, and hydrocarbon contaminants are purified to a marketable hydrocarbon product (49).

The invention relates to a method for desulphurizing MTBE with high sulphur content, belonging to the field of the refining of methyl tertiary butyl ether (MTBE). The methyl tertiary butyl ether (MTBE) with high sulphur content is placed into a distillation tower and heated by a reboiler, the temperature of a tower kettle is kept between 90 DEG C and 120 DEG C, the pressure of the tower kettle iskept at 0.08+/-0.02 MPa, the temperature of a tower top is kept between 69 DEG C and 75 DEG C, and the pressure of the tower top is kept at 0.06+/-0.02 MPa so that a finished product is distilled outof the tower top, a reflux ratio is kept from 1 to 10, and a sulfur product is recycled from a tower bottom. The invention has the advantages of simple process, advanced technology, easy and convenient control operation, little investment, low cost and no three-waste pollution.

An integrated process for production of ultra low sulfur products of high octane gasoline, high aromatic naphtha and high Cetane Diesel from high aromatic middle distillate range streams from any cracker units such as Light Cycle Oil (LCO) stream of Fluid catalytic cracking (FCC) units and comprising of subjecting the feed boiling between 200 to 400° C. and having at least 30 wt % multi-ring aromatics content subjected to hydrotreating for removal of heteroatoms like sulfur and nitrogen and at a pressure sufficient only for saturation of one ring of multi-ring aromatics. The effluent from hydrotreating is subjected to hydrocracking at same pressure of hydrotreating step above for selective opening of saturated ring of multi-ring aromatics. The effluent from hydrocracking is separated in CUT-1 boiling between 35 to 70° C., CUT-2 boiling between 70 to 200° C. in which the monoaromatics and alkylated monoaromatics are concentrated and CUT-3 boiling above 200° C. in which concentration of saturates i.e. paraffins and naphthenes significantly increased. The CUT-3 is selectively oxidized in selective oxidation step in presence of catalyst, an oxidizing agent and operating conditions such that it results in diesel product with more enhanced Cetane.

The invention relates to a method for extracting sulfur in sulfur-contained slag by chlorohydrocarbon organic solvent. The method adopts the technical scheme that raw sulfur cream sulfur-contained slag is used as a raw material to carry out centrifugal separation, extraction reaction, solution filtration, cooling crystallization and solid-liquid separation to obtain a sulfur product; a great deal of raw sulfur cream sulfur-contained slag produced when gas produced by an iron and steel coking enterprise is purified and desulphurized is used as the raw material; after being ground, the raw material carries out extraction reaction with the organic solvent; the solution carries out heat preservation filtration, the cooling crystallization and the solid-liquid separation to obtain a sulfur product, and the low-price and poison solvent for recovering sulfur is developed. The invention overcomes the defects of resource consumption, corresponding environmental pollution, and the like caused by not adopting an effective processing measure on the sulfur-contained slag in the prior HPF method gas desulphurizing technology and is widely applied to process and recycle the sulfur-contained slag produced in the coking desulphurization process in iron and steel smelting industries.

In ridding fluids, including hydrocarbon fluids, both gaseous and liquid, of sulfur compounds including hydrogen sulfide, oxides of sulfur, and thiols, the present invention uses a small quantity of an activator, generally a noble metal oxide, preferably a copper species and/or a manganese species, along with a known oxide product, such as iron oxide, iron hydroxide, zinc oxide, zinc hydroxide, manganese oxide, manganese hydroxide, or combinations thereof, to thoroughly remove sulfur contaminants in a short amount of time. The activator allows for the use of smaller reactor vessels and the production of hydrocarbon fluids substantially free of sulfur products.

The invention relates to biological complex shaped fuel and the preparation method. The comprised components of fuel and their proportion are as follows: straw 80- 95 uints, refined coal 5- 20 units and sulfur- fixing agent 0.5- 1uints. The production method comprises following steps: (1) disintegrating straw with water content being 13- 17% into particles with size being smaller than 5mm; (2) disintegrating refined coal with water content being 13- 17% to particles with size smaller than 1mm; (3) mixing said straw, refined coal and sulfur- fixing agent according to said proportion; (4) feeding said mixture into shaping machine, extruding at 110- 150 Deg. C and 105- 120 Mpa, getting granular or block- shaped fuel with density being 1.2- 1.4 g/ cm3 and water content being 10- 12%; (5) cooling temperature of got shaped fuel to room temperature, and packing. The fuel is characterized by convenient transportation, easy storage and no sulfur product generation, and it is a sustainable new energy.

The invention discloses a system and a method for co-producing sulfo-aluminate cement and sulfur by use of desulfurized gypsum and aluminum ash. The method comprises the following steps: (1) drying aluminum ash, and heating desulfurized gypsum for dehydration to obtain semi-hydrated gypsum; (2) mixing aluminum ash with semi-hydrated gypsum according to a preset ratio, pulverizing, and homogenizing; (3) calcining the pulverized and homogenized mixture of aluminum ash and semi-hydrated gypsum while adding coal dust to the mixture, and carrying out oxygen enriched combustion to obtain sulfo-aluminate cement clinker and sulfur dioxide-containing flue gas; (4) mixing sulfo-aluminate cement clinker and desulfurized gypsum according to a ratio, and pulverizing to obtain sulfo-aluminate cement; and (5) dedusting the sulfur dioxide-containing flue gas, and carrying out catalytic reduction to obtain a sulfur product, wherein the mass ratio of aluminum ash to desulfurized gypsum to carbon powder is (33-39):(61-66):1.

The invention discloses a method for recovering sulfur from atmospheric-pressure oxygen-rich leached residues of lead-zinc ores, and particularly relates to the recovery of sulfur in lead-zinc ore leached residues through vacuum distillation, belonging to the field of reclamation and reuse of solid waste resources. The method comprises the following steps of: placing atmospheric-pressure oxygen-rich leached residues, subjected to drying, milling and screening pretreatment, of lead-zinc ores into a vacuum distillation furnace, heating the residues to 200-400 DEG C, and controlling the pressure of the inside of the furnace to 600-10000 Pa, so that sulfur in the leached residues is sublimated and volatilized; pumping sulfur-containing vapor out of the distillation furnace by a vacuum pump; and cooling the sulfur-containing vapor so as to obtain a sulfur product. After the distillation is completed and the sulfur is completely volatilized, high-boiling-point residues are discharged out of the distillation furnace in a solid powder form. In the whole process, the furnace is internally sealed, thereby avoiding the oxidation and environmental pollution of elemental sulfur. The method is simple in technological process and equipment, high in sulfur recovery rate and product quality, low in energy consumption, strong in adaptability to raw materials and pollution-free, so that the method disclosed by the invention is an economic and efficient sulfur extraction method and can realize the zero discharge of waste smelting residues in a lead-zinc wet process, thus the method has broad application prospects.

The invention discloses a method for recycling sphalerite from separated tailings of lead-sulfur bulk concentrate. The method for recycling the sphalerite from the separated tailings of the lead-sulfur bulk concentrate comprises the steps that firstly, water is added to the separated tailings of the lead-sulfur bulk concentrate, and the mass percent concentration of a pulp is adjusted to be 25%-32%; secondly, an appropriate amount of lime is added so that the pH value of the pulp can be adjusted, and pyrite is inhibited at the same time; thirdly, copper sulfate is added as an activating agent to activate the sphalerite; and finally, a collecting agent, aniline, and a foaming agent are added for flotation of the sphalerite, the flotation procedure comprises one-time rough flotation, two-time scavenging and three-time concentration (after the concentrate obtained through rough flotation is ground to the extent that the ores reaching the grain level of >-0.043 mm account for 90%, concentration is conducted ), and effective concentration of the sphalerite is achieved. According to the sphalerite obtained through the method, the zinc grade is higher than 40%, and the recovery rate of zinc is higher than 80%. By the adoption of the method for recycling the sphalerite from the separated tailings of the lead-sulfur bulk concentrate, the zinc lost in the lead-sulfur separated tailings, namely sulfur products, can be well recycled, the comprehensive recovery rate of zinc is improved, and the economic benefits of a concentrating plant are increased.

The invention discloses a method for nano sulfur atomization synthesis. The method concretely comprises respectively atomizing a starting material solution and a precipitant solution which are prepared well, controlling gas flow and liquid drop dimension of an atomizer, reacting to synthesize nano sulfur; scattering and precipitating the nano sulfur in a buffer solution and absorbing by-product gas phase through a recycling liquid; filtering the buffer solution through centrifugal separation to obtain nano sulfur sediment products, and performing washing and drying to obtain nano sulfur products; and evaporating and drying the remaining buffer solution and the recycling liquid to obtain reaction by-product chemical sodium salt. Through gas flow atomization, fog drips containing starting materials and fog drips containing a precipitant collide and are mixed with each other, the reaction occurs in the scale range of the fog drips; due to the limitation of the fog drip scale and concentration, the sizes of the products are far smaller than those of the fog drips, and the size uniformity and shape consistency of the obtained products are good. Reacting exhaust gas is fully absorbed through the waste gas recycling liquid and then discharged, and reacting by-products are high-purity sulphurizing salt or sulfite chemical products and are free of environmental pollution.

The invention discloses a method for extracting valuable metal from seabed multi-metal sulfide mineral coupling complex ore. The method comprises the steps of obtaining leaching liquid containing copper and zinc and leaching slag containing sulfur, gold and silver through catalysis, oxidation and leaching; exacting copper products and zinc products out of the leaching liquid, and exacting sulfur products, gold products and silver products out of the leaching slag. By means of the method, valuable elements including copper, zinc, gold, silver and sulfur in the seabed multi-metal sulfide mineral coupling complex ore can be recycled comprehensively, the method has the advantages that the multipurpose utilization rate is high, the recycling rate is high, the process is simple, the cleanliness is achieved, and energy is saved, and the method is effective in processing new resources in the seabed multi-metal sulfide mineral coupling complex ore.

The invention discloses a method for separating sulfur from a sulfur-containing system. The method comprises that a composition containing a Fe-based ionic liquid, a solvent and a surfactant is employed, the composition promotes agglomeration of sulfur simple substance in a sulfur-containing system, and therefore small-particle sulfur generated in a sulfur-containing system rapidly grows into a sulfur particle with relatively large particle size at a relatively low temperature, and the sulfur product generated in the desulphurization technology is easy for sedimentation and recovery, and is prevented from depositing on a reactor wall or blocking a pipe. Also, investment reutilization is realized and economic benefit is increased.

The invention provides a technological method for desorbing organic sulphur at low temperatures; wherein, the organic sulphur is hydrolyzed into H2 and CO2 and H2S is absorbed after being cooled by waste gas and absorbed by absorbing fluid for organic sulphur; the absorbing fluid for organic sulphur is regenerated by aerating gaseous CO, and the regenerated H2S is then aerated into H2S absorbing liquid so as to regenerate the H2S absorbing liquid in the air-blow method; the sulfur product can be obtained after the sulfur generated in the regeneration process goes through working procedures of centrifugal separation, washing, dehydration and fusion. The invention has the advantages that sulphur in the high-concentration organic sulphur waste gas can be effectively desorbed, with an absorbing and purifying efficiency more than 95 percent; meanwhile, the used catalysts, namely, the absorbing liquid for organic sulphur and H2S absorbing liquid are guaranteed for regeneration; the simple substance of sulphur absorbed by the catalyst can be effectively recycled at the same time of regeneration. The invention has simple process, small investment, low running cost and simple operation, requires low labor intensity, and does not pollute the environment.

A method for making sulfuric acid comprises: providing solid sulfur, melting the solid sulfur into liquid sulfur in a sulfur melting tank, burning the sulfur to generate a sulfur product, recycling high order heat energy generated from burning the sulfur and providing the high order heat energy to a distillation tower, recycling low order heat energy generated from burning the sulfur and providing the low order heat energy to the sulfur melting tank, providing hydrogen peroxide or sulfuric acid containing hydrogen peroxide into an absorption-reaction tower for reacting to produce a sulfuric acid product, and concentrating or purifying the sulfuric acid product to improve its concentration or purity.

The invention relates to a method for one-step preparation of insoluble sulfur. In a production process of insoluble sulfur, rapid cooling is one of very key process steps, realizes an effect of instantly stopping a reversible reaction and further directly affects the content of insoluble sulfur in a product. The method provided by the invention comprises the following steps of directly heating raw material sulfur to 120-150 DEG C, forming a large number of sulfur liquid droplets by centrifugal atomization through an atomizer, and increasing the specific surface area of sulfur; then heating to 180-240 DEG C by circulating hot nitrogen for ring-opening polymerization, and keeping for 2-25 seconds; further cooling by circulating cold nitrogen, and cooling to below 60 DEG C at 2-20 seconds; performing cyclone separation, collecting and packaging to obtain the insoluble sulfur product, wherein the average particle size of the product is 10 mu m-50 mu m; recycling the separated nitrogen. The method provided by the invention has the advantages of simple process, safety, environmental friendliness and low cost.

The present invention provides a new liquid fertilizer comprised of potassium sulfite and potassium bisulfite, with neutral to slightly alkaline pH, relatively lower salt index and potentially lower phytotoxicity damage compared to other sources of potassium and sulfur products applied in equal amounts as a starter fertilizer. More specifically, the present invention further relates to methods for fertilizing using a composition of potassium sulfite and potassium bisulfite, particularly as a starter fertilizer, in-furrow fertilizer, side dress fertilizer, and for foliar, broadcast, soil injection and fertigation applications. The fertilizer composition is comprised primarily of potassium sulfite (with the fertilizer grade of 0-0-23-8S).

The invention provides a method for removing sulfides in a high aromatic hydrocarbon content oil product. The method comprises the following steps: 1) the mixed liquid of monatomic organic low-carbon acid and inorganic acid, vitriol acid salt or acid salt of phosphoric acid with the mol concentration ratio of 1 to between 4 and 9 to 2 is prepared, the mixed acid prepared is mixed with an oxidant according to the volume ratio of between 10 to 1 and 1 to 5, and the mixed solution is mixed with raw oil according to the volume ratio of between 1 to 8 and 9 to 1 to form an oil-water two phase medium; 2) the medium is subjected to emulsion breaking and split phase; and 3) by a composite extractant consisting of a polar solvent in which the aromatic hydrocarbon is not dissolved and water, the oil product after oxidation is subjected to extraction, the polar solvent is mixed with the water according to the volume ratio of between 2 to 1 and 1 to 4 to obtain the composite extractant, and the sulfides in the oil product are removed to obtain a low-sulfur product. The method can be applied to the desulfating process of heavy oil and the high aromatic hydrocarbon content oil product, and the method also has the advantages of low cost, simple method, good desulfating effect and no secondary pollution, and meets the requirement of an environment-friendly chemical engineering process.

The present invention provides a process flow for removing CO2 and H2S in gas mixture. The invention is characterized in that the process flow satisfies the high recovery rate requirement to the effective component in the purifying process of the gas mixture which contains the impurities of CO2 and H2S, satisfies the high recovery rate requirement to the effective component in the purifying process of the gas mixture which comprises CO2 and H2S, and realizes the recovery of sulfur product and high-concentration CO2 thereby effectively increasing the economic and social benefit of the gas mixture purifier.