427 results about "Carbonyl sulfide" patented technology

An acid gas absorbent comprising a metal sulfonate, phosphonate or carboxylate of a hindered amine and a process for the selective removal Of H2S as well as other acidic components such as carbon disulfide, carbonyl sulfide and oxygen and sulfur derivatives of C1 to C4 hydrocarbons from mixtures containing such acidic components and CO2 using said absorbent.

The liquefied petroleum gas deep desulfurizing process includes the following steps: mixing alcohol amine treated liquefied petroleum gas with desulfurizer aqua, feeding the mixture into a reactor with carbonyl sulfide hydrolyzing catalyst for hydrolyzing carbonyl sulfide into hydrogen sulfide and CO2 and eliminating hydrogen sulfide, regenerating the used desulfurizer, water washing the liquefied petroleum gas to eliminate residual desulfurizer with water containing dissolved oxygen or hydrogen peroxide in a water washing tower with hydrogen peroxide decomposing catalyst in the stuffing layer, eliminating mercaptan from the liquefied petroleum gas through oxidizing mercaptan into disulfide in a mercaptan eliminating reactor with catalyst, and final rectifying in a rectifying tower to eliminate disulfide. The process is simple and practical, and can lower the total sulfide content in liquefied petroleum gas to below 5 ppm.

The invention relates to a liquid hydrocarbon mercaptan removal technique capable of deeply removing total sulfur, in particular to a sweetening technique for liquefied gas in an oil refinery. The oil refining liquid hydrocarbon refers to components of liquefied gas and light gasoline, wherein the liquefied gas is a raw material for producing MTBE, and the light gasoline is a component for producing high-cleanness gasoline. In order to solve the problem of high total sulfur in the oil refining MTBE and the light gasoline, according to the shape and the distribution rule of sulfocompounds in the liquid hydrocarbon, processes such as functional reinforcement of a recycle solvent, three-phase mixed reinforced regeneration, regenerated catalyst and extractant separation and recycle solvent deoxidization and the like are adopted in the conventional process of liquid hydrocarbon extraction, oxidization and mercaptan removal, so the technical effects of reinforcing the mercaptan removal depth, improving carbonyl sulfide removal rate, and avoiding forming disulphide in the extracting, saving energy and reducing emission and the like are achieved. Thus, the liquid hydrocarbon can be deeply desulfurated, the problem of high total sulfur in the oil refining MTBE and the light gasoline is solved and the slag discharging quantity in the conventional process is greatly reduced.

The specification discloses a process for the manufacture of carbon disulfide from sulfur dioxide and carbon monoxide comprising two catalytic reactions. In the first reaction, sulfur dioxide and carbon monoxide are converted to carbonyl sulfide and carbon dioxide. In the second reaction, carbonyl sulfide is disproportionated to carbon disulfide and carbon dioxide. The second reaction is conducted in the presence of a solvent, which continuously removes the carbon disulfide product so as to drive the reaction to completion.

The invention relates to a preparation of catalyzing and transforming-absorbing Fe-desulphurizer by high accuracy carbonyl sulfur at medium and low temperature, which has a good hydrogenation effect to the carbonyl sulfur and absorbs the produced carbonyl sulfur. The invention can be used to accurately remove the carbonyl sulfur in the ammonia material gas, coke oven gas, natural gas and composed gas. The desulphurizer is provided with primary active components Fe2O3, CeO2, MnO2, Ni2O3, and secondary components CuO, ZnO, MgO, K2O and etc, and the carriers are Al2O3, ZrO2, and residual binding agent and expanding drilling agent, and water. The process has a reacting temperature of 150-350 DEG C, an airspeed of 500-2000h-1, a carbonyl sulfur concentration in the gas from minim to 5000ppm. The inventive desulphurizer has a high catalytic transforming capacity with a carbonyl sulfur converting ratio more than 99%.

The invention provides an active carbon based catalyst for hydrolyzing and catalyzing carbonyl sulfur in low temperature, which is characterized in that the catalyst takes active carbon as a carrier and is prepared by the following method: washing the active carbon, drying the active carbon for 2-4 hours under 100-140 DEG C; impregnating the active carbon in the (A) step for 6-12 hours with the impregnation liquid of alkaline substances or metal oxides or organic alcohol amine, wherein, the mass content of the alkaline substances or the metal oxides or the organic alcohol amine accounts for 5-30 percent of that of the active carbon; drying the impregnated active carbon for 2-6 hours under the constant temperature of 100-140 DEG C and then activating the active carbon for 2-4 hours under the temperature of 300-500 DEG C and the protection of N2. The catalyst can be used for catalyzing and hydrolyzing COS and removing H2S; furthermore, the catalyst can remove the COS in the gas under the temperature of 30-100 DEG C, ensure the conversion rate of the COS to be larger than 90 percent and remove the H2S generated in hydrolysis at the same time. The COS concentration which is between 100-1500ppm has a wide adaptive range, high desulfurization accuracy and higher breakthrough sulfur capacity.

Methods for removing carbonyl sulfide (COS) from a synthesis gas stream are disclosed. The method entails raising the water level of a wet scrubber so that hydrolysis of the COS may occur in the scrubber itself instead of a COS reduction chamber and no additional catalysts other than those naturally occurring in the production of the synthesis gas need be introduced into the scrubber. The water is raised, in one example, to a level such that water within an inner tube of the wet scrubber flows over an upper end of the inner tube. Raising the water level in the scrubber ensures intimate and vigorous interaction between the water, the COS, and the naturally occurring catalyst, and promotes the hydrolysis of the COS. In one example, the naturally occurring catalyst (e.g., alumina oxide) is present in the coal ash produced when coal is the fuel gasified that creates the synthesis gas stream.

A method for removal of mercury from a gaseous stream containing the mercury, hydrogen and/or CO, and hydrogen sulfide and/or carbonyl sulfide in which a dispersed Cu-containing sorbent is contacted with the gaseous stream at a temperature in the range of about 25° C. to about 300° C. until the mercury concentration in the gaseous stream after contacting the sorbent exceeds a predetermined breakthrough level, signaling a spent sorbent. Arsenic, cadmium and selenium present in the gaseous stream may also be captured along with the mercury. The spent sorbent is then contacted with a desorbing gaseous stream at a temperature equal to or slightly higher than the temperature at which the mercury adsorption is carried out, producing a regenerated sorbent and an exhaust gas comprising released mercury. The released mercury in the exhaust gas is then captured using a high-capacity sorbent, such as sulfur-impregnated activated carbon, at a temperature less than about 100° C. The regenerated sorbent may then be used to capture additional mercury from the mercury-containing gaseous stream. The process may be carried out at pressures in the range of about 1 bar to about 200 bar.

Provided are a method for removing sulfur compounds contained in a hydrocarbon-containing gas in which in feeding a hydrocarbon-containing gas to a desulfurizing bed to remove sulfur compounds contained in the above gas, used is the desulfurizing bed constituted from a desulfurizing agent A comprising zeolite and a desulfurizing agent B comprising at least one selected from a metal element, a metal oxide and a metal component-carried oxide, and a production process of hydrogen for a fuel cell in which a hydrocarbon-containing gas subjected to desulfurization treatment by the above method is brought into contact with a partial oxidation reforming catalyst, an autothermal reforming catalyst or a steam reforming catalyst. According to the method of the present invention, combined use of two kinds of the desulfurizing agents having different desulfurizing performances and use of a raw material gas having a low concentration of carbonyl sulfide make it possible to efficiently remove all of sulfur compounds contained in a hydrocarbon-containing gas to a low concentration even at a room temperature. Further, hydrogen for a fuel cell can economically advantageously be produced by subjecting the desulfurization-treated hydrocarbon-containing gas obtained by the method described above to reforming treatment.

The invention relates to a method for fine desulphurization of C4 in a refinery, which comprises the following steps that: C4 is coarsely desulfurized through solid alkali in the refinery; the C4 coarsely desulfurized touches a carbonyl sulfur absorbent in the refinery and most of carbonyl sulfur and thiol in C4 are absorbed and removed; and C4 of the refinery touches a fine desulphurization absorbent again to absorb and remove the remaining sulfur. The total sulfur content of C4 in the refinery is reduced to less than 1mg/m<3> after C4 is finely desulfurized according to the method provided by the invention, thus meeting the requirement for C4 to be used as industrial raw material. The desulfurized C4 is free of impurity such as carbon dioxide and so on, so as not to influence subsequent processes. The fine desulphurization method provided by the invention achieves industrial production of desulphurization of C4 in the refinery, and ensures complex utilization of C4 in the refinery.

The RE oxysulfide catalyst has the chemical expression of Re2O2S, where Re is La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho and Er. The preparation process of the catalyst includes hydrolysis of RE oxide and activation with the mixed gas of SO2 and CO at 400-700 deg.c. The catalyst has excellent hydrolysis effect on COS and other organic sulfide, certain sulfate resistance and oxygen poison resistance, and under the reaction condition including temperature 100-250 deg.c, COS content 150-300 ppm, space velocity 5,000-10,000/Hr it results in a COS conversion rate higher than 90%.

The invention provides a carbonyl sulfide hydrolysis catalyst prepared by using Co-Ni-Al-like hydrotalcite as a precursor and a preparation method thereof. The preparation method comprises the following steps of: at room temperature, dissolving cobalt nitrate, nickel nitrate and aluminum nitrate in distilled water to prepare solution A, wherein the total metal molar number is 0.75mol, n(Co2+):n(Ni2+) is equal to 0.25 to 1, and n(Co2++Ni2+):n(Al3+) is equal to 1.5 to 4; by using NaOH and Na2CO3 as precipitators, dissolving 0.05 moles of the NaOH and the Na2CO3 in the distilled water to prepare solution B; adding the solution A into the solution B dropwise to obtain suspension; and crystallizing the suspension in water bath, and then performing vacuum filtration, washing the crystals by the distilled, drying the crystals, baking the crystals in air, milling the crystals, tabletting the powder and screening the powder to obtain the hydrotalcite derivational compound oxide catalyst. The hydrolysis catalyst prepared by the method can be remove COS in gases, and simultaneously remove H2S generated in hydrolysis, and the desulfurization precision is high; and the hydrolysis catalyst can be used at the low temperature, the operational temperature is between 30 and 80 DEG C, and the energy consumption is low.

The invention relates to a preparation method of an absorbent used for removing impurities from olefin flows. The absorbent contains components of zeolite molecular sieves, activated alumina and metal oxides. The preparation method adopts an in-situ synthesis method and an ion exchange method: the zeolite molecular sieves are synthetized on an activated alumina carrier, and then the metal oxides are loaded on the absorbent through ion exchange. Compared with the prior art, the absorbent prepared by adopting the preparation method has the advantages of even pore distribution and low absorption heat effect, performs a deep absorption function, can be used for removing one or more mixtures from carbon dioxide, hydrogen sulfide, carbonyl sulfide, methanol, mercaptan, ammonia, or other impurity compounds containing O, S or N from the olefin flows of ethylene, propylene, or the like.

The invention provides a purification process for propone produced in refinery, wherein the raw material is propone produced in refinery, and the process comprises: passing a carbonyl sulfide hydrolytic reactor containing carbonyl sulfide hydrolytic agent therein and a zinc oxide desulfurization reactor containing zinc oxide desulfurization agent therein; passing a fine desulfurization reactor containing fine desulfurization agent therein; passing a dechlorination reactor containing an inorganic antichlor and an organic antichlor; passing a dearsenization and dephosphorization reactor containing dearsenization and dephosphorization agents, passing a de- oxygen-containing and nitrogen-containing compound reactor containing oxygen-containing and nitrogen-containing compound adsorbents therein; obtaining a purified product. The product can take place cracking propone for polymerizing monomer and catalytically synthesizing organic compounds, to increase value of propone produced in refinery, and to expand the application ranges of propone produced in refinery.

PCT No. PCT/CA97/00536 Sec. 371 Date Jul. 15, 1998 Sec. 102(e) Date Jul. 15, 1998 PCT Filed Jul. 28, 1997 PCT Pub. No. WO98/04337 PCT Pub. Date Feb. 5, 1998Hydrogen sulfide is removed from gas streams by reaction with sulfur dioxide in an autogeneously-formed aqueous acid medium according to the equation: SO2+2H2S->2H2O+3S the sulfur being removed from the aqueous phase. Carbonyl sulfide and/or carbon disulfide is removed from gas streams by hydrolysis to hydrogen sulfide in the presence of a weak organic base catalyst, such as quinoline, with the hydrogen sulfide reacting with sulfur dioxide to form sulfur.

The invention discloses a preparation method of a modified bio-charcoal based catalyst, which can remove carbonyl sulfide, carbon disulfide, and hydrogen cyanide at the same time. The bio-charcoal is taken as the carrier, a series of modifications is carried out to prepare the catalyst, the catalyst is applied to catalytic hydrolysis so as to simultaneously remove COS, CS2, and HCN; the work temperature of the catalyst is not higher than 100 DEG C, the removal rates of COS and CS2 are not less than 90%, the removal rate of HCN is not less than 70%; and the bio-charcoal based catalyst is prepared by the following steps: subjecting waste biomass to carbonization and activation in sequence so as to obtain the bio-charcoal carrier, then boiling the bio-charcoal carrier in a KOH solution, adding the bio-charcoal carrier in a metal salt solution to carry out ultrasonic impregnation, then burning the bio-charcoal carrier at a certain temperature; adding the burned bio-charcoal carrier into an alkaline solution to carry out ultrasonic impregnation, and finally drying to obtain the bio-charcoal based catalyst. The technology is concise, the operation is convenient, the operation is continuous, COS, CS2 and HCN in flue gas are removed and converted into valuable resources, and no secondary pollution is generated.

The invention relates to the field of synthesis of a high polymer material and aims to provide a preparation method of polymonosulfo-carbonate with a regular chain structure. The preparation method comprises the following steps of: adding epoxide, carbonyl sulfide, a catalyst and a catalyst promoter to a dry high-pressure reaction kettle, reacting for 0.5 hour -12.0 hours under self pressure at 0 DEG C-80 DEG C; and purifying and drying to obtain polymonosulfo-carbonate. The catalyst adopted by the preparation method disclosed by the invention has very high catalytic efficiency, and the method which is provided by the invention is different from a ring opening polymerization method for synthesizing polymonosulfo-carbonate in a controllable manner. The polymerization method is simple and easy to operate, and capable of accurately adjusting the polymer structure by adjusting the reaction conditions. The polymonosulfo-carbonate provided by the invention can be used more extensively; and the obtained product has a higher refractive index, for example, the COS-PO copolymer has the refractive index of 1.63, which is remarkably higher than that of the common copolymer, and therefore, the preparation method has a potential application to special optical materials such as adhesives.

The invention discloses a purificant for tail gas of natural gas and a preparation method thereof, especially to a purificant which removes hydrogen sulfide and carbonyl sulfide gas harmful to human beings in tail gas of natural gas produced in the process of industrial production or experiments through chemisorptions, belonging to the field of purification of atmospheric pollution. The purificant uses active carbon as a carrier and a soluble zinc salt and a soluble copper salt as active components. The preparation method for the purificant comprises the following steps: preparing an aqueous solution from the soluble zinc salt and the soluble copper salt; loading the aqueous solution on the active carbon carrier; and carrying out drying, oxidation treatment, washing with distilled water and drying. The normal temperature purificant provided by the invention is widely applicable to purification of ppm-grade hydrogen sulfide and carbonyl sulfide gas tail gas of natural gas used a factory or laboratory, and the content of hydrogen sulfide and carbonyl sulfide gas is less than 30 ppb after purification; and the purificant has the advantages of simple components, easy preparation, a low price, low usage cost and a good desulphurization effect and has a great popularization value.

The invention discloses a secondary aluminum battery and a preparation method of anode thereof; the secondary aluminum battery comprises a battery anode, a battery cathode, an electrolyte, a diaphragm and a current collector; the battery cathode is made of aluminum or aluminum alloy; the battery anode is made of polystyrene polysulfide or carbonyl sulfide composite material; and the electrolyte is halogen aluminic acid ionic liquid. The preparation method of secondary aluminum battery anode material (polystyrene polysulfide) comprises the following steps: (1) preparing chlorination polystyrene; (2) preparing polystyrene polysulfide; (3) slowly dropping sodium polysulfide solution into chlorination polystyrene solution according to the proportion of Na to C1 being 1: 1 at the temperature of 50 to 150 DEG C, stirring so as to react about 24 hours. Powder product is obtained after cleaning and extracting to obtain polystyrene polysulfide product dried about 24 hours in vacuum at the temperature of 80 DEG C.

The invention unfurls a kind of off O catalyst and its producing way and application. The catalyst of the invention is made of carry and the active parts on carry PtS, rate by carry weight: Pt: 0.01--0.5%(wt), S/Pt mol rate: 0.1--50, the carry is chosen in three oxide two aluminum, numerator sieve, two oxide silicon and active carbon. The invention apply the catalyst in taking off O to COS of 1--500ppm, O of 0.5 %( vacuum) of having hydrogen. Temperature is 25-450 degC, press is 1--15MPa. The catalyst of the invention has the strong ability to offence S poison, very well to be used in taking off O in the air including S.

The invention discloses a method and a device for simultaneously removing carbonyl sulfide and carbon disulfide. The device which is a desulfurization device comprises a heat exchange system, an assistant catalysis system, a continuous operation system, a catalyst regeneration system and the like. The heat exchange system comprises a cooling tower and fixed-bed reaction towers, the assistant catalysis system comprises a stripping tower, a spray tower and a communication pipe, the continuous operation system comprises the two fixed-bed reaction towers, and the catalyst regeneration system comprises the heat exchange system and a regeneration spray system. The method and the device have the advantages that the method is high in desulfurization efficiency, heat from high-temperature flue gas can be effectively utilized, dilute sulfuric acid which is a product can be recycled, and accordingly the catalytic reaction efficiency can be improved; the double reaction towers are respectively positioned at a catalytic reaction stage and a catalyst regeneration stage and can be switched over by the aid of electromagnetic valves in a timed manner, and accordingly continuous operation of the systems can be guaranteed; elemental sulfur on the surfaces of deactivated catalysts can be transferred into liquid phases in regeneration procedures and is convenient to extract in follow-up procedures, and the device is high in integration level and automation degree.