35results about "Ammonium sulfides/polysulfides" patented technology

This invention concerns processes for converting oxygenates to olefins that include a step of pretreating catalyst used in the conversion reaction. A fresh or regenerated metalloaluminophosphate molecular sieve, which is low in carbon content, is pretreated with an aldehyde. The aldehyde forms a hydrocarbon cocatalyst within the pore structure of the molecular sieve, and the pretreated molecular sieve containing the co-catalyst is used to convert oxygenate to an olefin product.

The invention discloses a method for preparing precipitated barium sulfate by utilizing titanium white waste acid, belonging to the technical field of comprehensive utilization of titanium white wasteacid and preparation of barium sulfate. The method comprises the following steps of adding ammonium hydroxide to neutralize with titanium white waste acid firstly, then generating ammonium sulfate, and controlling a systemic pH to separate out photodegredation sediment; then adding the ammonium hydroxide continuously, and controlling the pH to separate out ferrous hydroxide sediment; then addinghydrogen peroxide in proportion, oxidating residual Fe2<+> into Fe3<+>, and adjusting the pH to separate out ferric hydroxide sediment; condensing an ammonium sulfate solution, then replacing a mirabilite solution in a traditional precipitated barium sulfate production process, enabling the ammonium sulfate solution to generate replacement reaction with a barium sulfide solution, and washing, drying and smashing to prepare a precipitated barium sulfate product. According to the method, after neutralizing the titanium white waste acid with the ammonium hydroxide and performing purification andimpurity removal, a traditional sodium sulfate solution is replaced for producing the precipitated barium sulfate, meanwhile, recycled photodegredation sediment can be further used for titanium dioxide production, not only are resources saved, but also waste can be recycled, and the waste acid treatment costs of titanium dioxide plants and environment protection pressure are reduced.

The invention discloses a method for recycling treated ladle refining waste residues, and belongs to the technical field of secondary resource recycling. The method comprises the following operation steps: solid waste mixing: mixing the ladle refining waste residues and secondary aluminum ash according to a certain proportion, so that N/S in the mixed mixture is 1-2; mixed material water leaching: mixing and stirring the mixture and water according to the proportion of 1: 2-1: 3, and performing leaching at the normal temperature; and solid-liquid separation: after leaching for a period of time, directly discharging an upper-layer solution, carrying out solid-liquid separation on lower-layer slurry, retaining the separated filtrate in next mixed material water leaching for reuse, and heating and roasting the separated filter residues for 2-3 hours. The invention aims to overcome the problem that in the prior art, the ladle refining waste residues are difficult to treat in a large amount and at low cost, and provides the method for recycling the treated steel ladle refining waste residues, so that the desulfurization rate is high, the desulfurization speed is high, the removed sulfur-containing substances can be reused, and the economic benefit is greatly improved.

A crystallization column and a crystallization method. The crystallization column comprises an upper head (1), a tower body (2) and a lower head (3), wherein a crystallization section (11) is provided with a tray (14); and the tray (14) comprises a tray plate (15) and a plurality of lower crystallization members (17). The top end of the lower crystallization member (17) can form a movable connection with the tray plate (15), so that the two adjacent lower crystallizing members (17) are capable of oscillating collisions. The tray (14) may also comprise a plurality of upper crystallization members (21) extending upwardly from the upper surface of the tray plate (15).

The invention relates the technical filed of utilization of manganese-containing waste liquor produced during production of hydroquinone, in particular to a method for preparing manganese sulfide coproduced with strontium sulfate and ammonium sulfide by using the manganese-containing waste liquor produced during the production of hydroquinone. The method mainly comprises the following steps of: performing suction filtration on the waste liquor produced by hydroquinone by using a suction filter machine to obtain filtrate, distilling and filtering the filtrate, and performing deep processing on a filter cake to obtain a manganese sulfide product; and distilling the filtrate under a reduced pressure and performing further deep processing on the filtrate respectively to obtain a strontium sulfate product and an ammonium sulfide product respectively. By adopting the method, the waste liquor can be treated completely, environmental pollution caused by waste liquor is relieved, valuable manganese sulfide, strontium sulfate and ammonium sulfide products can be prepared, remarkable social benefit and economic benefit are achieved, and process and production equipment are simple. The method is a relatively practical treatment and utilization method.

The invention relates to the technical field of utilization of manganese-containing waste liquid generated during the production of hydroquinone, in particular to a method for co-production of manganese sulfide, magnesium sulfate and ammonium sulfide from manganese-containing waste liquid generated during the hydroquinone production. The method mainly comprises the following steps: firstly the waste liquid generated during the hydroquinone production is filtered by a filtering machine to produce a filtrate, the filtrate is distilled and filtered to produce a filter cake and a filtrate, and the filter cake is deep-processed to obtain a manganese sulfide product; and the filtrate is further distilled under a reduced pressure and then deep-processed to obtain a magnesium sulfate product and an ammonium sulfide product respectively. The method can not only completely eliminate the waste liquid to reduce the environmental pollution due to the waste liquid but also provide the valuable products of manganese sulfide, magnesium sulfate and ammonium sulfide. The method not only has significant social and economic benefits but also simplifies the production process and the production equipment, and is a relatively practical method for treatment and utilization.

The invention relates to the technical field of the utilization of manganese-containing waste liquid obtained by producing hydroquinone, in particular to a method for preparing co-product of manganese sulfide and ammonium sulfate as well as ammonium sulfide by manganese-containing waste liquid obtained by producing hydroquinone. The method mainly comprises the steps of: firstly, leaching the manganese-containing waste liquid obtained by producing hydroquinone by a leaching machine, and obtaining filtrate for distilling and filtering; carrying out deep processing on a filter cake, and obtaining the manganese sulfide product; and then carrying out reduced pressure distillation on the filtrate, respectively carrying out further deep processing, and obtaining the ammonium sulfate and the ammonium sulfide. The method leads the waste liquid to be cleanly removed so as to reduce the pollution of the waste liquid for the environment, and can be used for preparing the valuable manganese sulfide, ammonium sulfate and ammonium sulfide, thus not only being remarkable in social benefit and economic benefit, but also being simple in technique and production equipment; therefore, the invention is a more practical processing and utilizing method.

The invention relates to an NBPT hazardous waste harmless treatment method. The NBPT hazardous waste harmless treatment method comprises the following steps that firstly, a degradation transforming agent is added in a reaction kettle, NBPT hazardous waste is added, stirring and heating are conducted, ammonia and distilled condensate liquid are obtained, an absorption tower is inflated with the ammonia for water absorption, the distilled condensate liquid is transferred into a normal-pressure rectifying tower, the reaction kettle is subjected to stirring cooling to 25 DEG C-30 DEG C, the distilled condensate liquid is refined at the temperature lower than the n-butylamine boiling point, tower roof extracted liquid is n-butylamine, and tower bottom kettle liquid serves as the degradation transforming agent to return into the reaction kettle; and secondly, a desulfuration transforming agent is added into the reaction kettle with 10 kg/min, the stirring reaction is conducted at 35-55 DEG Cfor 1-2 h, hydrogen sulfide is obtained and led into an ammonium hydroxide absorption tower for chemical absorption, an ammonium sulfide solution with the concentration being 16-20% is obtained, theammonium sulfide solution is subjected to centrifugal separation, filter liquor and filter residue calcium superphosphate are obtained, and the filter liquor serves as the desulfuration transforming agent to return into the reaction kettle. The NBPT hazardous waste harmless treatment method is free of three-waste emission and can reach all resource recycling.

The invention discloses a hydrogen sulphide-containing gas treatment device. The device comprises a cooler, a mixer and a crystallization tower; a hydrogen sulphide-containing gas feeding pipeline is connected with an inlet of the cooler; an outlet of the cooler is connected with an inlet of the mixer; the inlet of the mixer is also connected with the hydrogen sulphide-containing gas feeding pipeline; an outlet of the mixer is connected with an inlet of the crystallization tower. The invention also discloses a hydrogen sulphide-containing gas treatment method. According to the hydrogen sulphide-containing gas treatment method and the hydrogen sulphide-containing gas treatment device, the hydrogen sulphide is separated from a hydrogen sulphide-containing gas and simultaneously an ammonium hydrogen sulphide product is obtained by utilizing the characteristic that ammonia gas and hydrogen sulphide perform gas phase reaction to generate ammonium hydrogen sulphide; the method is simple in process and low in energy consumption, is particularly suitable for separating acid gas of a refinery plant; the used crystallization tower has the advantages that crystal substances fall easily, the surface on which the crystal substances can be attached is large and the like.

The invention relates the technical filed of utilization of manganese-containing waste liquor produced during production of hydroquinone, in particular to a method for preparing manganese sulfide coproduced with potassium sulfate and ammonium sulfide by using the manganese-containing waste liquor produced during the production of hydroquinone. The method mainly comprises the following steps of: performing suction filtration on the waste liquor produced by hydroquinone by using a suction filter machine to obtain filtrate, distilling and filtering the filtrate, and performing deep processing on a filter cake to obtain a manganese sulfide product; and distilling the filtrate under a reduced pressure and performing further deep processing on the filtrate respectively to obtain a potassium sulfate product and an ammonium sulfide product respectively. By adopting the method, the waste liquor can be treated completely, environmental pollution caused by waste liquor is relieved, valuable manganese sulfide, potassium sulfate product and ammonium sulfide products can be prepared, remarkable social benefit and economic benefit are achieved, and process and production equipment are simple. The method is a relatively practical treatment and utilization method.

The invention relates the technical filed of utilization of manganese-containing waste liquor produced during production of hydroquinone, in particular to a method for preparing manganese sulfide coproduced with lithium sulfate and ammonium sulfide by using the manganese-containing waste liquor produced during production of hydroquinone. The method mainly comprises the following steps of: performing suction filtration on the waste liquor produced by the hydroquinone by using a suction filter machine to obtain filtrate, distilling and filtering the filtrate, and performing deep processing on a filter cake to obtain a manganese sulfide product; and distilling the filtrate under a reduced pressure and performing further deep processing on the filtrate respectively to obtain a lithium sulfate product and an ammonium sulfide product respectively. By adopting the method, the waste liquor can be treated completely, environmental pollution caused by waste liquor is relieved, valuable manganese sulfide, lithium sulfate and ammonium sulfide products can be prepared, remarkable social benefit and economic benefit are achieved, and process and production equipment are simple. The method is a relatively practical treatment and utilization method.

The invention relates to the technical field of sodium sulfide solution preparation, in particular to an ammonium sulfide solution and a production process thereof. The ammonium sulfide solution is composed of water and ammonium sulfide, the content of ammonium sulfide in the ammonium sulfide solution ranges from 15% to 40%, and the ammonium sulfide solution is stored in a storage tank in a sealedmode. The solution has the beneficial effects that production is carried out in a mode of preparing the ammonia water on site, so that volatilization of the ammonia water in the storage process is greatly reduced, the concentration precision of the ammonia water is improved, errors are reduced, the concentration error of the produced sodium sulfide is reduced, meanwhile, the reaction efficiency and solubility are improved by utilizing the gas storage tank and controlling the temperature, gas leakage caused in the dissolving process is avoided, so that the production safety and stability are improved, and compared with the traditional technology, the process is more stable and safer in production and higher in precision.

The invention discloses a preparation method of a sulfur positive electrode composite material based on high-energy density type graphene, which comprises the following steps: adding graphite powder, sodium nitrate and potassium permanganate into concentrated sulfuric acid, and stirring to slowly heat; after the solution is reacted and heated, adding deionized water and a reducing agent, filtering and drying to obtain graphite oxide; the preparation method comprises the following steps: performing ultrasonic treatment on graphite oxide to obtain a dispersion liquid A, heating to 80-90 DEG C, adding hydrazine hydrate, filtering, washing and drying to obtain graphene oxide; adding water into graphene oxide, and performing ultrasonic treatment to obtain dispersion liquid B; adding water into inorganic sulfide, stirring and dissolving to obtain a sulfur solution C; and mixing the dispersion liquid B and the sulfur solution C until the reaction is complete, adding dilute acid to adjust the solution to be acidic, filtering and drying to obtain the graphene/sulfur positive electrode composite material, the capacity is 1186 mAh.g <-1 > under the charging condition of 0.1 DEG C, the coulombic efficiency is 96% after 200 times of circulation, the capacity is 997 mAh.g <-1 > under the charging condition of 1 DEG C, and the capacity is 578 mAh.g <-1 > after 1000 times of circulation.

The invention provides a low-grade complex nickel-molybdenum ore cleaning pretreatment method. Nickel-molybdenum ores, a chlorinating agent and water are uniformly mixed at the specific proportions and then subjected to pelleting, material balls after being pelleted are directly placed in a volatilization furnace without being dried, and chlorination volatilization and smelting are conducted undera specific warming mechanism. Products such as molybdenum chloride, zinc chloride, arsenic chloride, nickel chloride, ammonium sulfide and ammonium sulfate in the smoke generated by volatilization are recycled respectively in a smoke collection device. The method can treat various kinds of low-grade and complex nickel-molybdenum ores, molybdenum, zinc, nickel and other valuable components in thenickel-molybdenum ores can be separated in a one-step mode, sulphur can be recycled in the forms of ammonium sulfide, ammonium sulfate and the like, and emission of low-concentration SO2 is avoided. Meanwhile, harmful components such as concomitant arsenic in the nickel-molybdenum ores can be deeply volatilized and removed, and the volatile residue obtained through volatilization is harmless to the environment. Compared with an existing nickel-molybdenum ore treatment method, the method has the advantages that the energy consumption is low, the efficiency is high, and the clean and environment-friendly effects are achieved.

A process and a reactor system for the preparation of an olefinic product by reacting an oxygenate feedstock in the presence of an oxygenate conversion catalyst within a reactor system under oxygenate-to-olefin conversion conditions, to obtain the olefinic product, wherein the reactor system has a contact surface coming in contact with oxygenates and wherein at least part of the contact surface is an material of the formula MX wherein: M is a metal and X is C, or M is a metal or Si and X is N.