The disclosure discloses an online resourceful treatment method of electroless copper plating waste solution. According to the disclosure, a copper catalyst is adopted to perform autocatalytic reaction on electroless copper plating waste solution in an autocatalytic reactor, copper simple substances are reduced from copper ions in the waste solution and recycled, the treated waste solution enters into a three-dimensional electrolyzer and a membrane filtration plant for further purification, the finally treated electroless copper plating waste solution meets water quality discharge standard, and the recovery rate of the copper simple substances can reach up to above 95%.

Described herein are methods, systems, and compositions for providing catalysts for tail gas clean up in sulfur recovery operations. Aspects involve obtaining catalyst that was used in a first process, which is not a tailgas treating process and then using the so-obtained catalyst in a tailgas treating process. For example, the catalyst may originally be a hydroprocessing catalyst. A beneficial aspect of the described methods and systems is that the re-use of spent hydroprocessing catalyst reduces hazardous waste generation by operators from spent catalyst disposal. Ultimately, this helps reduce the environmental impact of the catalyst life cycle. The described methods and systems also provide an economically attractive source of high-performance catalyst for tailgas treatment, which benefits the spent catalyst generator, the catalyst provider, and the catalyst consumer.

Described herein are methods, systems, and compositions for providing catalysts for tail gas clean up in sulfur recovery operations. Aspects involve obtaining catalyst that was used in a first process, which is not a tailgas treating process and then using the so-obtained catalyst in a tailgas treating process. For example, the catalyst may originally be a hydroprocessing catalyst. A beneficial aspect of the described methods and systems is that the re-use of spent hydroprocessing catalyst reduces hazardous waste generation by operators from spent catalyst disposal. Ultimately, this helps reduce the environmental impact of the catalyst life cycle. The described methods and systems also provide an economically attractive source of high-performance catalyst for tailgas treatment, which benefits the spent catalyst generator, the catalyst provider, and the catalyst consumer.

A gas replacement process and a gas replacement apparatus are employed, in the nitro compound hydrogenation reaction process. The gas replacement process at least includes a first step of subjecting a stream to be replaced to the gas replacement in presence of a first replacement gas, and then a second step of subjecting to the gas replacement in presence of the second replacement gas. Assuming the superficial velocity of the first replacement gas is V1, and the superficial velocity of the second replacement gas is V2, then V2/V1≥1.5.

The invention has as its object a catalyst that comprises a substrate based on alumina or silica or silica-alumina, at least one element from group VIII, at least one element from group VIB, and an organic compound of formula (I) ##STR00001##
in which R1, R2, R3, R4 and R5 are selected from among a hydrogen atom, or a hydroxyl radical, or a hydrocarbon radical that comprises from 1 to 12 carbon atoms that can also comprise at least one oxygen atom, and R6 is selected from a hydrogen atom, a hydrocarbon radical that comprises from 1 to 12 carbon atoms that can also comprise at least one oxygen atom, a methacryloyl radical, an acryloyl radical or an acetyl radical. The invention also relates to the method for preparation of said catalyst and its use in a method for hydrotreatment and/or hydrocracking.

In one aspect, the disclosure relates to processes for production of ammonia and hydrogen under low reaction severity using as reactants nitrogen and at least one C1-C4 hydrocarbon, e.g., methane. The disclosed processes are carried out using a heterogeneous catalyst comprising a metal selected from Group 7, Group 8, Group 9, Group 10, Group 11, and combinations thereof; wherein the metal is present in an amount from about 0.1 wt % to about 20 wt % based on the total weight of the heterogeneous catalyst; and a metal oxide support. The processes can be carried out at about ambient pressure and at a heterogeneous catalyst temperature of from about 50° C. to about 250° C. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

In one aspect, the disclosure relates to processes for production of ammonia and hydrogen under low reaction severity using as reactants nitrogen and at least one C1-C4 hydrocarbon, e.g., methane. The disclosed processes are carried out using a heterogeneous catalyst comprising a metal selected from Group 7, Group 8, Group 9, Group 10, Group 11, and combinations thereof; wherein the metal is present in an amount from about 0.1 wt % to about 20 wt % based on the total weight of the heterogeneous catalyst; and a metal oxide support. The processes can be carried out at about ambient pressure and at a heterogeneous catalyst temperature of from about 50° C. to about 250° C. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

Systems and methods for containing a subsea flow of hydrocarbons includes a water intake. The water intake is operable to be positioned downstream of the subsea flow of hydrocarbons. A receiving facility is located at a surface of a sea. A suction hose extends from the water intake to the receiving facility. A suction system is operable to reduce a fluid pressure within the water intake.

The present invention relates to a process for hydroconversion of a heavy hydrocarbon feedstock in the presence of hydrogen, at least one supported solid catalyst and at least one dispersed solid catalyst obtained from at least one salt of a heteropolyanion combining molybdenum and at least one metal selected from cobalt and nickel in a Strandberg, Keggin, lacunary Keggin or substituted lacunary Keggin structure.

CeO.sub.2 nanoparticles having a copper domain disposed on at least a portion of the nanoparticle. The material can catalyze a nitrogen oxide decomposition, such as a deN.sub.xO.sub.y reaction. Methods of making and using the material are also provided.