38 results about "Butylxanthate" patented technology

The invention relates to a method for extracting pyrite in cyanide residue breaking cyanide floatation, which belongs to the method for extracting pyrite by floatation from cyanide tailings. After Colt'ss acid process on cyanide residue, the mass percentage concentration of ore pulp is 30%. H2SO4 is first added to make the PH value of ore pulp reach 4. Then, sodium polyphosphate and sodium fluosilicate are added as regulators, sodium n-butylxanthate as collectors as well as MIBC as a foaming agent. Twice roughing, twice scavenging and twice fine selection work are conducted to get the concentrate product with sulfur grade of 49.01% and recovery rate of 92.96%. The combined regulators provided by the method realize the floatation and enrichment of pyrite, solving the problem of difficulty in floatation of micro-fine particle pyrite. The method allows the cyanide residues that are hard to deal with to be fully utilized, and improves the economic efficiency.

The invention relates to a new synthetic method of arbekacin and an intermediate of dibekacin thereof. The method adopts kanamycin B as an initial synthetic raw material; five amino groups of kanamycin B are protected by butoxycarbonyl; 4''-position and 6''-position hydroxyls are protected by aldol condensation; 3'-position and 2''-position hydroxyls are selectively acylated; a 4'-position hydroxyl is sulfonylated; then an epoxy structure is formed; the epoxy structure is treated by potassium n-butylxanthate to form double bonds; and catalytic hydrogenation is performed to obtain dibekacin; dibekacin is used as a raw material; all amino groups and hydroxyls of the dibekacin are protected by hexamethyl disilyamine; side chain connection of 1-position amino group is performed with synthetic active ester; the silyl protection is removed; and finally arbekacin is obtained by hydrazine hydrate hydrazinolysis. The synthetic method is simple in operation, high in yield, friendly for environment, low in production cost, and quite suitable for industrial production.

The invention discloses a method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings. By the adoption of the method, the technical problem that if the antimony-containing gold ore flotation tailings are subjected to cyanide leaching directly, the cost is high, and the gold recovery rate is low is solved. Meanwhile, efficient recovery of associated antimony minerals can also be achieved. The method is characterized by comprising the steps that the tailings are rated, the tailings with the particle size being larger than 0.038 mm are subjected to regrinding and size mixing, copper sulfate, lead nitrate and ammonia carbonate are added sequentially as a mixed activating agent, sodium n-butylxanthate and ammonium butyl aerofloat serve as a collecting agent, No.2 oil serves as a foaming agent, and gold and the antimony minerals are recycled through flotation; and water is directly added into the tailings with the particle size being smaller than 0.038 mm for size mixing, grinding is not needed, sodium hexametaphosphate, copper sulfate, lead nitrate, ammonia carbonate, sodium n-butylxanthate, No.25 aerofloat, kerosene (or diesel oil) and No.2 oil are added in sequence, wherein the sodium hexametaphosphate serves a dispersing agent, the copper sulfate, lead nitrate and ammonia carbonate serve as an activating agent, the n-butylxanthate and No.25 aerofloat serve as a collecting agent, the kerosene (or diesel oil) serves an emulsifying agent, and the No.2 oil serves as a foaming agent, and gold and the micro-fine particle antimony minerals are recycled through flotation. The technique is reasonable, procedures are simple, the gold and antimony recovery rate is high, and industrialized implementation is easy.

The invention relates to a combined collecting agent for niobium-titanium-uranium ore floatation. The combined collecting agent comprises, by mass, 60-90% of methyl benzyl arsonic acid and 10-40% of sodium n-butylxanthate. The methyl benzyl arsonic acid and the sodium n-butylxanthate are both analytically pure. A niobium-titanium-uranium ore floatation method adopts the combined collecting agent claimed in the claim 1 and comprises the following steps of (1) preparing a collecting agent solution; (2) conducting ore grinding; (3) conducting pulp mixing; (4) conducting niobium-titanium-uranium ore floatation; and (5) conducting multiple concentration on niobium-titanium-uranium rough concentration obtained in the step (4) until reaching the ideal floatation index again. Through the combinedcollecting agent provided by the invention, effective floatation of niobium-titanium-uranium ores can be realized. The combined collecting agent has the characteristics of being good in selectivity, high in collecting capacity, low in requirement for floatation temperature, little in use amount and the like. Gravity concentration is subjected to floatation through primary roughing, primary scavenging and secondary concentration closed-loop technological process, the grade of uranium in the floatation concentrate can reach 1% or more, and the recovery rate can reach 92% or more.