119 results about "Dichlorodifluoromethane" patented technology

The invention provides a power generation system for waste heat of medium and low temperature flue gas with heat pipe heat exchanger organic medium Rankine cycle, and belongs to the technical field of energy and environment. The invention comprises a heat pipe heat exchanger system, a working medium circulation loop of organic Rankine cycle, a medium and low temperature flue gas exhausting pipeline, a heating hot water loop and a cooling water loop, wherein an ascending pipe and a descending pipe of a boiler are replaced by heat pipes, the heat pipe heat exchanger system is formed by a heat pipe, a flue gas heat exchanger and a boiler cylinder, evaporating section of the lower end of the heat pipe is arranged in flue gas heat exchanger, condensing section of the upper end is arranged in the boiler barrel, toluene, dichlorodifluoromethane, propane and pentafluoropropane are used as working medium, 20% volume of the softening desalted water is used as the heat pipe fluid. The invention has advantages of high efficiency of heat exchange, convenient replacement of heat pipe, being capable of avoiding corrosion and uneasy-change of the heat exchanger pipe, affecting the heat transfer efficiency and leakage of the working medium and other advantages, and being capable of adjusting exhaust heat of the organic Rankine cycle according to the demand for heating load of users.

Disclosed are working fluid compositions for heat transfer apparatuses, such as refrigeration systems, that include a refrigerant and an ester based lubricant. The working fluid may comprise ≦50% by weight of the ester based lubricant composition and ≧50% by weight of one or more refrigerant compounds. The ester based lubricant comprises an additive selected from the group consisting of: diaryl sulfides, arylalkyl sulfides, dialkyl sulfides, diaryl disulfides, arylalkyl disulfides, dialkyl disulfides, diaryl polysulfides, arylalkyl polysulfides, dialkyl polysulfides, dithiocarbamates, derivatives of 2-mercaptobenzothiazole, derivatives of 2,5-dimercapto-1,3,4-thiadiazole, and combinations thereof. The refrigerants may be C3-C8 hydrocarbons, trichlorofluoromethane (CFC-11), dichlorodifluoromethane (CFC-12), saturated hydrofluorocarbons, difluoromethane (HFC-32), 1,1,2,2-tetrafluoroethane (HFC-134), difluoroethane (HFC-152a), fluoroethane (HFC-161), R410A (a near-azeotropic mixture of difluoromethane (HFC-32) and pentafluoroethane (HFC-125)), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), 1,1,1,2,3,3-hexafluoropropane (HFC-236ea), 1,1,1,3,3,3-hexafluoropropane (HFC-236fa), 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,1,1,3,3-pentafluorobutane (HFC-365mfc), hydrofluoroolefins, dimethyl ether, carbon dioxide, bis(trifluoromethyl)sulfide, and trifluoroiodomethane and combinations thereof.

The invention relates to an anti-rust cleaning liquid for mechanical processing equipment. The anti-rust cleaning liquid consists of the following components in parts by mass: 50 to 54 parts of trisodium phosphate, 52 to 56 parts of ethoxyamine, 48 to 52 parts of octaphenyl polyoxyethyiene, 52 to 56 parts of citric acid, 48 to 52 parts of ethylene glycol butyl ether, 52 to 56 parts of benzyl triphenyl phosphorous bromide, 48 to 52 parts of malic acid, 54 to 58 parts of dichlorodifluoromethane, 48 to 52 parts of benzotriazole, 52 to 56 parts of calcium sorbate, 48 to 52 parts of caprylic / capric glycerides, 52 to 56 parts of oxalic acid, 48 to 52 parts of hard resin acid monoglyceride, 52 to 56 parts of hyclroxy acetic acid, 48 to 52 parts of biochemical fulvic acid, 48 to 52 parts of sodium nitrite, 52 to 56 parts of epoxy acid zinc, 48 to 52 parts of morpholine, 52 to 56 parts of petroleum mahogany sulfonate, 48 to 52 parts of chlorothalonil, and 1000 to 2000 parts of water. The anti-rust cleaning liquid has the advantages that the cleaning capability is better, the anti-rust and non-corrosive effects are realized, and the anti-bacteria and mildew-proof effects are realized.

The present invention relates to a process for the synthesis of highly active modified carbon supported palladium catalyst by simultaneously impregnating activated carbon with a palladium precursor and an aluminium precursor. The carbon supported palladium catalyst is useful for the hydrodechlorination of dichlorodifluoromethane to produce difluoromethane.

The invention discloses a preparation method of a polyvinylidene fluoride separation membrane. Polyvinylidene fluoride is taken as a membrane raw material; and the preparation method comprises following steps: 1) by weight, 1 to 2 parts of hexyldecanol, 0.8 part of hydrogen peroxide, and 1.1 parts of an inorganic base solution are delivered into a reaction vessel for uniform mixing, 1.6 parts of poly(ethylene glycol) monooleate, 14.5 parts of dichlorodifluoromethane solvent, and 1.8 parts of phenylmethylsulfonyl fluoride solution are subjected to 25min of reaction at -6 DEG C with stirring; 2) 1.3 parts of sodium oleoyl amino fatty acid, 2.2 parts of a hexyldecanol solution, 59 parts of vinylidene fluoride monomer, and 1.8 parts of methylcyclopentane are delivered into the reaction vessel, an obtained mixture is subjected to reaction at 18 DEG C with stirring, and reaction is stopped when pressure is reduced to be lower than 0.23MPa; and 3) an obtained product is filtered, washed, and dried so as to obtain polyvinylidene fluoride powder. The polyvinylidene fluoride separation membrane possesses corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weather resistance.

The invention discloses an anti-oxidation flux and a preparation method thereof. The anti-oxidation flux is prepared from, by weight, 100-200 parts of vegetable oil modified rosin, 120-150 parts of ethyl alcohol, 60-80 parts of carbitol, 40-120 parts of polyethylene glycol, 20-60 parts of sebacic acid, 50-80 parts of maleic acid, 90-100 parts of malic acid, 40-60 parts of citric acid, 20-30 parts of butyl acetate, 7-15 parts of malonic acid amide, 20-60 parts of nicotinamide, 10-20 parts of zinc nitrate, 20-60 parts of olein, 40-80 parts of isocyanate and 40-90 parts of dichlorodifluoromethane. The preparation method includes: adding the raw materials, performing heating reaction, adding the nicotinamide, and well stirring. The anti-oxidation flux is excellent in wettability, surface tension of welded materials is reduced, and accordingly surface oxidation of the welded materials is prevented.

A group of known refrigerants, (R-227ea, R-124, R-134a, R-143a, R-125, R-E125, R-E143a, R-E227ca2, R-254cb, R-600a, R-142b, R-22, R-290, R-E170, R-1270, R-1216, R-218, R-C318, R-C270), that may be combined in novel ways to produce several excellent “drop-in” substitutes for refrigerants R-12 or R-500. The performance of the preferred “drop-in” substitutes for R-12 or R-500 of the present invention often exceeds that of the refrigerant being replaced, while maintaining acceptable oil circulation with existing mineral oils used in R-12 or R-500 refrigeration and air conditioning systems.

An apparatus and method wherein potential ozone layer-damaging dichlorodifluoromethane (Refrigerant R-12) is substituted with a mix of less environmentally damaging refrigerants Chlorodifluoroethane and Tetrafluoroethane in dichlorodifluoromethane-based air-cooling systems, in particular HVAC and refrigeration applications. While less environmentally damaging than dichlorodifluoromethane, the substitute refrigerant is less flammable than presently available refrigerants, yet still has a temperature-pressure relationship close enough to that of dichlorodifluoromethane, making the substitute refrigerant suitable for use with dichlorodifluoromethane-based air-cooling systems. In this event, it is mixed with a lubricating oil that is compatible with both the unit refrigerant and typical R-12 system design.

The invention discloses a rapid sealing material, which consists of an A group of preparations and a B group of preparations, wherein the A group of preparations consists of 70 to 80 weight parts of polyglycol ether, 5 to 10 weight parts of triethylene diamine, 5 to 10 weight parts of dimethyl methylphosphonate, 1 to 5 weight parts of alpha-methyl styrene, 5 to 10 weight parts of difluorodichloromethane and 1 to 1.5 megapascals of nitrogen; and the B group of preparations consists of 90 to 95 weight parts of diisocyanate, 5 to 10 weight parts of difluorodichloromethane and 1.0 to 1.5 megapascals of nitrogen. The rapid sealing material provided by the invention has the characteristics of high fire retardance, high density and high reaction speed, and after being injected into a plugged part, can be rapidly expanded and isolate a passage space to limit the spreading and dissemination of heat, water, fire, harmful gases and dust, thereby fulfilling the aims of plugging a passage and isolating air.