76 results about "Phosphorus pentasulphide" patented technology

A solid electrolyte sheet including: 80 to 99 wt % of an inorganic solid electrolyte, and 1 to 20 wt % of a binder; the inorganic solid electrolyte being obtainable by firing a raw material containing lithium sulfide (Li2S) with phosphorus pentasulfide (P2S5), or elemental phosphorus and elemental sulfur.

The invention discloses a sulfide ore floatation composite collecting agent and a preparation method and application thereof. The sulfide ore floatation composite collecting agent is composed of modified X oil and hydrocarbon-type oil. The preparation method of the sulfide ore floatation composite collecting agent comprises the steps that the hydrocarbon-type oil is used as a solvent; and the X oil and phosphorus pentasulfide react, and thus the composite collecting agent composed of the modified X oil and the hydrocarbon-type oil is obtained. The preparation method is wide in raw material source, low in cost and simple in process operation, the prepared floatation collecting agent has high collecting capacity and selectivity to sulfide ores such as copper sulfide ores, copper-molybdenum ores and lead-zinc ores are achieved, and good floatation indexes in a floatation test are obtained.

The present invention provides a prolinamide compound useful as a drug or the like and an industrially advantageous method for producing a piperazinyl pyrazole compound that is a production intermediate of the prolinamide compound. Specifically, the invention is a method for producing a compound represented by general formula (1) as represented by the following formula (where the symbols in the formula are the same as defined in the specification) or a salt thereof, wherein a compound represented by general formula (2) is produced, a pyrazole ring being formed via a reaction between a compound represented by general formula (3) and phosphorus pentasulfide; and, once the compound represented by general formula (2) is deprotected, a carboxylate of a compound represented by general formula (6) is produced, the compound obtained by forming a carboxylic acid and a salt.

The invention discloses a process for producing thiabendazole. The process includes carrying out condensation reaction on lactic acid and o-phenylenediamine in acidic aqueous solution(with, but not limited to, hydrochloric acid); regulating pH (potential of hydrogen) values to obtain 2-alpha-hydroxyl ethyl benzimidazole; placing the 2-alpha-hydroxyl ethyl benzimidazole in a container with acetone and sulfuric acid (but not limited to sulfuric acid, or hydrochloric acid and other inorganic acid and strong acid and weak alkali salt) and carrying out oxidation reaction on the 2-alpha-hydroxyl ethyl benzimidazole and potassium permanganate (but not limited to potassium permanganate, or hydrogen peroxide and organic peroxide); carrying out extraction, desolvation and drying to obtain 2-acetyl benzimidazole; placing the 2-acetyl benzimidazole in a container with glacial acetic acid and carrying out halogenations reaction on the 2-acetyl benzimidazole and bromine (but not limited to, or chlorine and other halogens); drying filter cake to obtain 2-dibromomethane acetyl benzimidazole hydrobromide; carrying out reaction on formamide and phosphorus pentasulfide in a container with ethyl acetate to obtain thioformamide; removing phosphorus pentoxide by means of filter-press by the aid of nitrogen to obtain thioformamide / ethyl acetate solution and carrying out cyclization reaction on the thioformamide / ethyl acetate solution and 2-dibromomethane acetyl benzimidazole; purifying reaction products and regulating pH (potential of hydrogen) values to obtain the thiabendazole with the content higher than or equal to 99%. The acetone and the sulfuric acid in the corresponding container are used as solvents. The glacial acetic acid in the corresponding container is used as a solvent. The ethyl acetate in the corresponding container is used as a solvent. The process has the advantages that the cost can be lowered, risks in the aspects of safety and environmental protection can be reduced, environmental pollution can be abated, and the production efficiency can be improved; integral reaction procedures are carried out at the normal temperatures under the normal pressures, accordingly, reaction conditions are mild, the yield of the reaction at each step is quite stable, and the overall yield measured by the aid of the o-phenylenediamine can reach 75% at least.

The invention discloses a boron magnetic rare earth lubricating oil additive and a preparation method thereof. The additive is prepared from mixed sulfur amine phosphate, lanthanum oxide, rare earth carbonate, boric acid and calcium sulfonate, wherein the weight ratio of the mixed sulfur amine phosphate to the lanthanum oxide, rare earth carbonate, boric acid and calcium sulfonate is 100:(4.5-5):(4.5-5):(12-17):(12-17); the mixed sulfur amine phosphate is prepared from ricinoleic acid and triethanolamine reacting with phosphorus pentasulfide and octanol. The additive disclosed by the invention is an oil-soluble boron magnetic rare earth complex which is used as a friction improver, an antiwear agent and a cleaning agent for the lubricating oil and particularly the lubricating oil for the engine of an internal combustion engine, and the energy saving effect is remarkable; with the rare earth element, low sulfur and low phosphorous, the additive also has the advantages of energy conservation and environmental protection.

The invention relates to a production process of O, O-dialkyl thiophosphoryl chloride, which improves the production process of the O, O-dialkyl thiophosphoryl chloride produced by a phosphorus pentasulfide method. An O, O-dialkyl thiophosphoryl chloride product is synthesized by adding a by-product obtained by reacting phosphorus pentasulfide with alkanol and introducing chlorine to O, O-dialkyl phosphorus chloride obtained by reacting trialkyl phosphite with phosphorus trichloride. The invention can achieve the total yield of the trialkyl phosphite by 94 percent and the total yield of the phosphorus pentasulfide more than 95 percent and has safe production, little energy consumption and pollution without generating sulphur residues.

The invention discloses a synthesizing method of chiral thiazolidine-2-thionone compound with structure formula 1, which is characterized by the following: refluxing chiral thiazolidine ketone and phosphorus pentasulfide in the organic solvent; simplifying the synthesizing method; controlling reacting condition easily; fitting for industrial manufacturing.

The invention relates to a method for preparing powdery phosphorus pentasulfide, belongs to the field of preparing a fine phosphorus chemical product in chemical industry, and in particular relates to a method for preparing powdery phosphorus pentasulfide by sheet phosphorus pentasulfide. The method comprises the following steps: the sheet phosphorus pentasulfide is put into grinding equipment and is ground under the protection of an inert solvent; and the phosphorus pentasulfide and the inert solvent are filtered and separated to obtain a powdery phosphorus pentasulfide product. The process of the method has the characteristics of simple processing, short processing time, easy and safe operation, high product yield and the like; and the yield of the powdery product can reach 99 percent.