97results about How to "High freezing point" patented technology

The invention discloses a coal flotation agent. The coal flotation agent is prepared from the following materials in parts by weight: 100 parts of oil-containing sludge, 100-400 parts of water, 0.25-1.5 parts of emulsifying agent, 0.1-5 parts of viscosity reducer and 0-5 parts of foaming agent. Besides, the invention further discloses a preparation method of the coal flotation agent. The coal flotation agent disclosed by the invention adopts the oil-containing sludge as the materials, and is added with the emulsifying agent, the viscosity reducer, the foaming agent and water. The produced coal flotation agent is an emulsion type coal flotation agent, so that the flotation agent is easy to disperse in a water phase during a coal flotation process, and therefore, the collection efficiency is improved. The condensation point of the oil-containing sludge is higher, and the added pour point reducer can be used for lowering the condensation point of the oil-containing sludge, so that the oil-containing sludge is improved in mobility and convenient to disperse; besides a foaming effect and a foam stabilizing effect, the added foaming agent can be used for achieving the effect of a cosurfactant during a process of preparing the emulsion type coal flotation agent, and can be cooperated with the emulsifying agent to stabilize the emulsion; and the added water can be used for improving the proportion of a continuous phase, and therefore, the coal flotation agent is beneficial to preparing oil-in-water emulsion.

The invention relates to a heavy oil cleaning agent comprising the following constituents (by weight percent): (1) Tetrasodium EDTA 1-5, (2) sodium nitrite 0.1-1, (3) sodium carbonate 0.5-2, (4) polyoxythylene fatty alcohol ether 2-10, (5) polyoxythylene fatty alcohol ether sodium sulfate 1-5, (6) triethanolamine 0.2-1, (9) balancing water.

The invention discloses a preparation method of high-quality glycerin monostearate. The method comprises the steps of reacting hydrogenated palm oil and glycerol under strong base catalysis to generate ester, and carrying out four-stage distillation to obtain high-quality glycerin monostearate. The acid value of the product is reduced to below 0.4, the freezing point is raised to 64-66 DEG C, the quality of the product is improved, and the difficulty of the prior art is overcome. Besides, the problems in the prior art that the pipeline is blocked by slag produced in the distillation process, the production efficiency is lowered, the product quality is reduced, the production is discontinuous and the processing efficiency is low resulting from scaling of an evaporating surface and a condensing surface are solved. Glycerol and hydrogenated palm oil can be recycled, so that the cost is low, the yield is high, the product quality is improved, and the whole processing controllability is high. The high-quality glycerin monostearate is suitable for industrial production.

The invention relates to a method for preparing a high-tower loss controlled compound fertilizer, and belongs to the technical field of fertilizer. The method comprises the following steps: adding heated monoammonium phosphate or calcium hydrophosphate, potassium chloride or potassium sulphate, powder stuffing into urea melt, and adding loss control agent KS-3 of fertilizer nutrient into the mixture at the same time, fully mixing the additives and the urea melt, quickly compounding each raw material under the action of mechanical stirring at melt temperature of urea into low-temperature mutual melt with certain flow properties, then granulating the mutual melt by adopting a process of spray granulation, and cooling and solidifying spray drops when falling in a granulation tower to pass through rising air flow to form the compound fertilizer with function of controlling loss of the fertilizer nutrient. The method has the advantages of easy process reform, and convenient operation.

The invention relates to a low-temperature-resistant premixed foam fire-extinguishing agent and a preparation method thereof, and mainly solves the problem that fire-fighting chemicals cannot be used in a low-temperature environment after being mixed with water in the prior art. The problem is solved well through adopting the technical scheme that the low-temperature-resistant premixed foam fire-extinguishing agent and the preparation method thereof are adopted, and comprises the following components in percentage by mass: 10-20% of pour point depressant, 0.1-1.0% of film-forming agent, 0.5-2.0% of foaming agent, 0.05-0.2% of penetrating agent, 0.2-1.0% of foam-stabilizing agent, 0.1-0.5% of preservative, 2-5% of other additives and the balance deionized water. A fire extinguisher or a fire-extinguishing device can be directly filled with the low-temperature-resistant premixed foam fire-extinguishing agent in the low-temperature environment to extinguish fire.

The invention discloses an oil-paper double-layer medium space charge measuring apparatus under wide temperature gradient and relates to a charge measuring device. The oil-paper double-layer medium space charge measuring apparatus under wide temperature gradient solves a technical problem that a conventional space charge measuring system under temperature gradient is incapable of measuring space charges under low temperature gradient, and comprises a top electrode, a top electrode shielding case, an electrode fixing slot, a bottom electrode, a piezoelectric sensor, a signal amplifier, and a temperature gradient heating device. A sample is located at the center of the upper surface of the bottom electrode. The top electrode is fixed by the top electrode fixing slot and is connected with a high-voltage pulse and a high-voltage DC source. The piezoelectric sensor is fixed to the lower surface of the bottom electrode. The oil-paper double-layer medium space charge measuring apparatus under wide temperature gradient is used for measuring the space charge distribution of the oil-paper under the temperature gradient by using a pulsed electroacoustic method and is used in the field of high voltage and insulation.

[Problem] To provide a reducing agent supply apparatus that can quickly melt urea aqueous solution solidified in a reducing agent injection valve to allow early start of the injection control of urea aqueous solution, a method for controlling the reducing agent supply apparatus, and an exhaust gas purification apparatus.

[Means for Resolution] reducing agent supply apparatus, including: a storage tank for storing liquid reducing agent; a pump for pumping the reducing agent; a reducing agent injection valve for injecting the reducing agent pumped by the pump in an exhaust pipe of an internal combustion engine; and a reducing agent passage connecting the pump to the reducing agent injection valve, wherein, when the internal combustion engine stops, a purge process of collecting the reducing agent in the reducing agent passage into the storage tank is performed, and wherein, on part of the reducing agent passage, a siphon function portion is provided for, even when, at the start of the internal combustion engine, the reducing agent injection valve is in injection failure due to solidification of the reducing agent in the reducing agent injection valve, causing some of the reducing agent to reach the reducing agent injection valve after the start of the pump to cause the solidified reducing agent to melt.

Efficient and clean diesel is characterized in by comprising the following components in parts by weight: 20-30 parts of diesel, 15-20 parts of kerosene, 20-35 parts of wash oil, 40-50 parts of heavy aromatics, 0.03-1.09 parts of ferrocene, 2-5 parts of dimethly carbonate, 1-3 parts of isobutanol and 1-3 parts of tertiary butanol. The invention has the following advantages: the efficient and clean diesel can replace diesel and has good using effect. The composite diesel meets the automobile diesel standard GB191472009.

The invention provides an oil-displacing agent for low condensate oil, which is a Gemini surfactant and ethylene-double (N-ethanesulfonic acid-ten amide) sodium salt. The oil-displacing agent for the low condensate oil can lead the freezing point of the low condensate oil to reduce, so that the low condensate oil is led to be in a flow state at existing oil layer temperature and can be easily extracted with an existing oil extraction method.

The invention relates to a process to prepare a microcrystalline wax and a middle distillate fuel by

• (a) hydrocracking/hydroisomerizing a Fischer-Tropsch product, wherein the weight ratio of compounds having at least 60 or more carbon atoms and compounds having at least 30 carbon atoms in the Fischer-Tropsch product is at least 0.2 and wherein at least 30 wt % of compounds in the Fischer-Tropsch product have at least 30 carbon atoms,
• (b) performing one or more distillate separations on the effluent of step (a) to obtain a middle distillate fuel fraction and a microcrystalline wax having an initial boiling point of between 500 and 600° C.

The invention relates to fireproof rubber which comprises the following raw materials in part by weight: 100 to 150 parts of chloroprene rubber, 100 to 130 parts of natural rubber, 5 to 10 parts of zinc oxide, 2 to 5 parts of hydrogen silicon oil, 2 to 5 parts of stearic acid, 15 to 30 parts of magnesium hydroxide, 2 to 5 parts of an accelerant, 2 to 5 parts of a vulcanizing agent, 3 to 10 parts of aluminum phosphate, 3 to 10 parts of sodium silicate, 3 to 10 parts of silicon carbide, 1 to 5 parts of an anti-aging agent, 5 to 10 parts of calcium carbonate, 1 to 5 parts of hydroxyl silicone oil, 1 to 5 parts of dimethicone and 1 to 5 parts of dibutyl phthalate. The fireproof rubber has good fire resistance, can perform a certain protection effect in a big fire and can reduce loss which is caused by the big fire and is brought to people.

The invention discloses a processing method for producing walnut oil. The processing method comprises the steps of airing, grinding, heat preservation, cake preparation, stewing, squeezing and filtering and specially comprises the steps of taking shelled walnut kernels; airing the shelled walnut kernels to obtain dried walnut kernels; grinding in a grinder, sealing the ground walnut kernels in a container, and carrying out heat preservation at the temperature of 55+/-5 DEG C for 2 hours; preparing cakes, putting the cakes in a food steamer for stewing by virtue of vapor; and after stewing, squeezing to obtain crude walnut oil; and precipitating the crude walnut oil for 36-48 hours and then filtering to obtain finished walnut oil. According to the invention, the walnut oil is intense and soft in taste, is beneficial to body health if used for a long time due to high monounsaturated fatty acid, and has high nutritive value and health effect.

The invention discloses a lubricating oil for gears. The lubricating oil is prepared from modified base oil, succinate, diethylenetriamine penta(methylene phosphonic acid), octyl diphenylamine, sorbitol, nano copper powder, C12 dibasic acids, beta-sitosterol, cholesteryl nonanoate, ethanediol amide cocoate and auxiliary additives. The lubricating oil for gears has the characteristics of favorable oxidation resistance, favorable corrosion resistance, favorable rust resistance, favorable wear resistance, favorable anti-friction property, high torque, favorable high-temperature stability, favorable demulsibility, long oil change period, favorable biodegradability and lower price than the traditional lubricating oil, and reduces the emissions of waste oil, waste gas and particles. The lubricating oil has the advantages of favorable viscosity, favorable lubricating property, favorable cooling property, excellent viscosity-temperature characteristics, high viscosity index, low condensation point and high flash point, and well reduces the friction between gear pairs.