58 results about "Chemical breakdown" patented technology

A downhole wellbore filtercake breaker is disclosed comprising one or more breaker chemicals (or activators thereof) capable of being activated with radiation to form one or more breaker reaction products which in turn are capable of reacting with the filtercake to chemically break down the filtercake. There is also disclosed a conventional reservoir drilling fluid modified to include an inactive, delayed, or sequestered breaker chemical or an activator thereof, wherein the breaker chemical (or activator) may be activated directly or indirectly by radiation, such as, microwave, visible, uV, soft x-ray, or other electromagnetic radiation. Also disclosed are methods for creating these filtercakes, and then breaking them via deploying a source of radiation that can be energized proximate to the filtercake. The breaker may be regenerated downhole by reaction with the filtercake breakdown products, and subjected again to a source of radiation to continue the breakdown of filtercake.

The invention relates to a metallurgy method of metal sulfide M1S; in the method, ionic liquid M2X is taken as electrolyte, metal sulfide is taken as a solid-state cathode, or the powder of metal sulfide added with electronic conduction matters or lumps and metal current collectors are compounded for being used as the solid-state cathode, graphite or inertia anode is taken as an anode, the electrolyte is carried out in inert atmosphere or air, the electrolyte temperature is controlled at 120-780 DEG C, the electrolyte time is controlled to lead the electrolysis electric quantity to reach theory needed theory electric quantity and above, the metal sulfide is decomposed into metal products and simple substance S by electrochemistry. The method has simple process, low energy consumption, high additional value of the product, wherein the prepared metal materials such as tantalum powder, tantalum, porous iron and other nanometer metal powder materials or superfine metal powder materials or porous metal materials can be directly used as hydrogen storage materials, battery materials, capacitor materials and the like or as the raw material for powder metallurgy and the like.

The invention discloses an internal discharge detection method of sulfur hexafluoride gas insulation equipment, comprising the following steps: A, providing a SF6 (sulfur hexafluoride) gas sample in the insulation equipment to be detected; B, after the sample is introduced in, detecting conventional ingredients in the gas sample by a TCD (thermal conductivity detector); C, After the TCD detects that SF6 almost flows out, inputting the sample into a FPD (flame photometry detector); D, detecting a trace product decomposed by SF6 via the FPD; and E, according to the content and the variation condition of the tract product, judging whether the SF6 gas insulation equipment has local discharge defects. In the invention, the internal insulation condition of electric equipment can be judged according to the chemical decomposer of SF6 gas. In the invention, a detection means for the internal insulation situation of GIS (Gas Insulated Switchgear) equipment is added, equipment station information is enriched, the internal discharge faults of GIS can be found as quickly as possible,equipment operation reliability is improved, a fault air chamber can be positioned quickly and accurately after discharge faults burst in GIS, and maintenance efficiency is improved.

The invention discloses a ternary CoFeCr hydrotalcite nanorod and a preparation method and application thereof. The preparation method comprises the steps: mixing cobalt nitrate, iron nitrate, chromium nitrate, urea and ammonium fluoride in water so as to prepare a precursor mixed solution, placing a substrate in the precursor mixed solution, transferring the substrate together with the precursormixed solution to an autoclave, and then performing a reacting at 110-130 DEG C for 360-600 minutes so as to prepare the ternary CoFeCr hydrotalcite nanorod on the substrate. The ternary CoFeCr hydrotalcite nanorod together with the substrate is directly used as a working electrode for electrochemical decomposition of water. Not only the ternary CoFeCr hydrotalcite nanorod has better performance of water electrolysis and oxygen evolution than transition metal oxide in the prior art, but also the preparation process is simple, fast and efficient, has low production energy consumption, low production cost, environmental protection and no pollution, and is suitable for large-scale industrial production.

Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce corrosion by physically removing or chemically decomposing the alkyl chloroformate impurities within the corrosion-resistant upstream sections of the apparatus.

Process to recover ruthenium in the form of ruthenium halide, particularly ruthenium chloride, from a ruthenium-containing supported catalyst material comprising:

• a) chemically decomposing the ruthenium-containing supported catalyst material;
• b) producing a raw ruthenium salt solution;
• c) purifying the raw ruthenium salt solution and optionally stripping gaseous ruthenium tetroxide from the raw ruthenium salt solution; and
• d) treating the purified ruthenium compound obtained in c), particularly the ruthenium tetroxide, with hydrogen halide or hydrohalic acid to obtain ruthenium halide, particularly with hydrogen chloride or hydrochloric acid to obtain ruthenium chloride.

A negative-ion putty able to durably release hydroxy negative ions to eliminate the harmful gases and odor in indoor air, such as formaldehyde, benzene, ammonia, NOx, etc and emit infrared rays to improve human immunity is prepared from polyvinyl alcohol, colloidal powder surfactant, active SiO2, bihydrated gypsum, talc powder, hydroxymethyl cellulose, heavy calcium carbonate, calcium hydroxide and negative-ion ore powder.

Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce corrosion by physically removing or chemically decomposing the alkyl chloroformate impurities within the corrosion-resistant upstream sections of the apparatus.

Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce corrosion by physically removing or chemically decomposing the alkyl chloroformate impurities within the corrosion-resistant upstream sections of the apparatus.

The invention discloses a manganese molybdate nanosheet material and a preparation method and application thereof. The preparation method comprises the steps of mixing sodium molybdate and manganese chloride in water regulating the concentration of sodium molybdate in the mixed solution to be 0.5-1.5mmol/l and regulating the concentration of manganese chloride to be 0.5-1.5mmol/l, thus obtaining aprecursor mixing solution; feeding a substrate into the precursor mixing solution; transferring the substrate and the precursor mixing solution into a high-pressure kettle; reacting for 360-480min under the temperature of 160-180 DEG C; and washing and drying, thus obtaining the MnMoO4 nanosheet on the substrate. The manganese molybdate nanosheet material is directly used as a working electrolytefor electrochemically decomposing water; the manganese molybdate nanosheet material is high in water electrolyzing catalyzing activity in electrolyte environments with different pH, and moreover, themanganese molybdate nanosheet material is quick to act, high in efficiency, low in cost, simple to prepare, environmentally friendly, and suitable for massive industrial production.

This invention involves a chemical agent, particularly a decomposition agent extracting fuel oil from sewage oil sludge. The decomposition agent includes (weight percentage): silica 65-75, alum 14-20, sodium hydroxide 4-8, potassium permanganate 0.05-0.1, water 3.9-5, and sodium carbonate 3-4. The decomposition has simple components, and is scientific, rational and effective. Against most sewage oil sludge having acidic characteristics, the basic ingredients such as sodium hydroxide are added to sewage oil sludge for demulsification so as to be close to a neutral pH value, and different components respectively with effects like water absorption, impurities removal, adsorption and coagulation aid are added, which make oil, soil and water degrade effectively, therefore the sewage sludge decomposition and purification effect is effectively improved and sewage sludge degrades more thoroughly.

The invention discloses a manganese tungstate nanosheet material and a preparation method and application thereof. The preparation method comprises: mixing sodium tungstate and manganese chloride in water to allow the sodium tungstate concentration of the obtained solution to be 0.5-1.5 mmol/L and the manganese chloride concentration of the solution to be 0.5-1.5 mmol/L so as to prepare a precursor mixture solution; putting a substrate into the precursor mixture solution; transferring the substrate and the precursor mixture solution together into an autoclave; reacting at 160-180 DEG C for 360-480 min; and cleaning and drying to prepare a MnWO4 nanosheet on the substrate. The manganese tungstate nanosheet material is adopted directly as a working electrode for electrochemical decompositionof water. The material has good water electrolysis catalytic activity in electrolyte environments having various pH values, and is rapid, efficient, cheap, simple to prepare, free of pollution to theenvironment and suitable for large-scale industrial production.