1359 results about "Dithiocarbamate" patented technology

The present invention provides composite lithium-based lubricating grease and a preparation method thereof. The composite lithium-based lubricating grease consists of thickener, base oil and additive. The thickener consists of 12-hydroxy stearic acid lithium dibasic acid and/or lithium borate, and the mol ratio is 1 ®U 0.1 to 1 ®U 0.1to 1. The base oil is mineral oil or poly-alpha-olefin synthesis oil. The additive consists of organic amine compound antioxidant, benzotriazole and barium petroleum sulfonate or barium dinonylnaphthalene sulfonate anti-corrosion additive and rust protection agent, dialkyl dithiocarbamate or dibenzyl disulfide and sulfurized olefin cottonseed oil extreme pressure antiwear additive and nanometer copper powder repairing additive. The contents of the thickener and the base oil are respectively 6 percent to 18 percent and 82 percent to 94 percent according to the weight percentage. The lubricating grease has the multi-effect performances of high dripping point, good high-temperature performance and low-temperature performance, chemical invariability, colloid invariability, antiwear extreme pressure performance etc., and especially has the repairing function towards a damaged bearing.

Mercury is removed from crude oils, natural gas condensates and other liquid hydrocarbons by first removing colloidal mercury and solids that contain adsorbed mercury and then treating the hydrocarbons with an organic or inorganic compound containing at least one sulfur atom reactive with mercury. The sulfur compound reacts with dissolved mercury that contaminates the hydrocarbons to form mercury-containing particulates that are then removed from the hydrocarbons to produce a purified product having a reduced mercury content. Preferably, the treating agent is an organic sulfur-containing compound such as a dithiocarbamate or sulfurized isobutylene.

A material for making elastomeric nitrile rubber articles is disclosed. In particular, the process and material formulation can produce nitrile rubber based articles, which exhibit force-strain characteristics that are comparable to those of natural rubber latex articles, while maintaining the tensile strength properties of nitrile rubber. The process includes an accelerator composition at the pre-cure stage having a dithiocarbamate, a thiazole, and a guanidine compound. The invention also includes an elastomeric nitrile rubber product made by the process, such as examination, surgical, or work gloves, which can have an exterior coating over naked rubber selected from either a silicone emulsion or oil, glycerin solution, a combined mixture of silicone and glycerin/glycerol, a fluorocarbon release agent, or a natural or synthetic hydrocarbon-based oil in amounts that do not degrade said substrate rubber material.

A low-phosphorus lubricating composition has less than 600 ppm phosphorus, comprising at least 85 weight % of a lubricating base blend, and an additive comprising the following, as weight % of the total composition:

(1) an organomolybdenum compound at an amount which provides about 0.1-800 ppm Mo;

(2) a hindered phenol at about 0.1-2%; and

(3) a dithiocarbamate at about 0.1-2%; with a first proviso that where the dithiocarbamate does not comprise a metal dithiocarbamate, the additive additionally comprises:

(4) an alkylated diphenylamine at about 0.1-2%, and with a second proviso that where the organomolybdenum compound comprises molybdenum dithiocarbamate, it is considered a metal dithiocarbamate for purposes of the first proviso_[G1], but is considered an organomolybdenum compound for the purposes of calculation of the amount present in the total composition.

The present invention relates to an engine oil lubricant composition for use in internal combustion engines comprising one or more molybdenum containing compounds that deliver 1-1000 ppm molybdenum to the finished oil, one or more phosphorus containing compounds that deliver 25-650 ppm phosphorus to the finished oil, and one or more poly(meth)acrylate viscosity index improvers (VI improvers) that may or may not be functionalized, for improved fuel economy and turbocharger related deposits. In addition, the composition comprises an antioxidant system which is carefully balanced to provide improved fuel economy, comprising an aminic antioxidant, a phenolic antioxidant and an ashless dithiocarbamate. Additionally, the formulated oil may contain a dispersant poly(meth)acrylate, in addition to the PAMA VI improver, to reduce the amount of traditional succinimide dispersants.

The invention discloses a pharmaceutical compound for treating wastewater containing complex heavy metals and/or radioactive substances and application of the pharmaceutical compound. The pharmaceutical compound comprises one of 8-hydroxyquinoline and derivatives of 8-hydroxyquinoline or a composition of any two of 8-hydroxyquinoline and the derivatives of 8-hydroxyquinoline, one of polyamine-dithiocarbamates or a composition of any two of the polyamine-dithiocarbamates, and one of dihydrocarbyl dithiophosphates or a composition of any two of the dihydrocarbyl dithiophosphates, wherein the mass fractions of the three components are respectively 1% to 90%, 1% to 90% and 1% to 98%. The pharmaceutical compound is dissolved in water and then the pharmaceutical compound solution is added into wastewater to be treated, and the amount of the pharmaceutical compound is 0.5 to 2 times larger than the theoretical amount of heavy metals and radioactive substances in the wastewater; and a metal complex is formed after sufficient stirring, and finally, the wastewater treatment can be completed by filtering separation. The pharmaceutical compound and the application of the pharmaceutical compound provided by the invention have the advantages of obvious effects, less investment, low cost, no site restriction, remote automatic control and the like.

The invention discloses a method for preparing polypropylene with high melt strength, which comprises melt-blending polypropylene, monomer containing double bond, peroxide, dithiocarbamate series substance and antioxidant. The dithiocarbamate is added as adjuvant to inhibit the propylene degradation of the peroxide, improve the graft ratio, reduce monomer amount containing double bond, and save the cost. The obtained polypropylene with high melt strength has melt strength more than 2-15 times of that of raw material, and gel content smaller than 10%.

An engine oil composition is composed of: (1) at least one oil selected from the group consisting of a mineral oil and a synthetic lubricant as a base oil; (2) a molybdenum dithiocarbamate in an amount of 50 to 2000 ppm by weight when calculated as molybdenum (Mo), relative to the total weight of the engine oil composition; (3) zinc dithiophosphate in an amount of 0.01 to 0.2 wt % when calculated as phosphorus (P), relative to the total amount of the engine oil composition; and (4) an ashless organic polysulfide compound in an amount of 0.01 to 0.4 wt % when calculated as sulfur (S), relative to the total amount of the engine oil composition.

The invention relates to a petroleum-engine oil composition and application thereof, and mainly aims to solve the problem of poor wear resistance of petroleum and engine oil existing in the prior art. The problem is well solved by adopting the technical scheme that the petroleum-engine oil composition comprises the following components in parts by weight: (a) 1-20 pars of a detergent, a dispersant or a mixture thereof, (b) 0.5-15 parts of an anti-oxygen wear-resistant agent, (c) 1-20 parts of a viscosity index modifier, (d) 0.01-5 parts of a pour point depressant, (e) 0.001-3 parts of an anti-foaming agent, and (f) 60-95 parts of base oil, wherein the anti-oxygen wear-resistant agent is selected from at least one of 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl mixed phenol, alkylated arylamine, zinc butyl octyl dithiophosphate, base zinc salt of dioctyl thiophosphate, di(octadecyl)-3,3-thiodipropionate, zinc(II)dibutyl dithiocarbamate, thiadiazole, molybdenum dithiocarbamate or molybdenum dialkyldithiophosphat. The petroleum-engine oil composition can be applied to industrial production of the petroleum-engine oil composition.

The invention relates to a method for preparing dithiocarbamate-based modified porous starch. The method comprises the steps that: using starch as the raw material; carrying out enzymolysis on the starch for 1 to 26 hours under the condition that the pH is between 4 and 6 and the temperature is between 30 and 60 DEG C by a complex enzyme consisting of a saccharifying enzyme and an alpha-amylase; drying the obtained product to prepare porous starch; and after carrying out crosslinking, etherification and aminating modification on the porous starch, grafting the product with carbon disulfide under the alkaling conndition to obtain the dithiocarbamate-based modified porous starch. Compared with the conventional porous starch, the dithiocarbamate-based modified porous starch of the invention has strong absorption characteristic and high adsorptive selectivity. When the adsorption effect is reduced, the dithiocarbamate-based modified porous starch is taken out and immersed in 2mol.L-1 of HNO3 solution to carry out desorption, the desorption ratio is over 90 percent, and the absorption effect is not reduced by repeated desorption. The invention has commendable economic and social benefits, and can be used for treatment of heavy metal ions in waste water in galvanization, battery and mining industries and the like.

The invention relates to a formula of an environment-friendly flame retardant hose, which comprises the following compositions and weight portions: 100 portions of ethylene propylene diene rubber, 20 portions to 40 portions of fast extruded carbon black, 40 portions to 60 portions of calcined clay, 120 portions to 160 portions of aluminium hydroxide, 5 portions to 10 portions of zinc borate, 10 portions to 20 portions of antimony trioxide, 0.5 portion to 0.8 portion of thiuram tetrasulfide, 1.5 portions to 2.0 portions of zinc dibutyl dithiocarbamate, 0.5 portion to 0.8 portion of tetramethyl thiuram disulfide, 3 portions to 5 portions of zinc oxide, 1 portion to 3 portions of stearic acid, 1 portion to 3 portions of polyethylene glycol, 1.5 portions to 2.0 portions of morpholine disulfide, 0.3 portion to 0.6 portion of sulfur and 20 portions to 40 portions of paraffin oil. Compared with the traditional product, the invention has the tensile strength of physical and mechanical property of 14MPa, which is higher than the traditional formula by 1.5 times. The invention can obtain FV-0 grade of vertical burn of national standard of flame resistance, namely the requirements of nonflammable material, can achieve the same flame resistant effect with the traditional method and meet the requirements of environment protection and safety of the hose of the modern automobile.

A method of removing one or more heavy metals from industrial wastewater by use of a membrane separation process is disclosed. Specifically, the following steps are taken to remove heavy metals from industrial wastewater: (a) collecting an industrial wastewater containing heavy metals in a receptacle suitable to hold said industrial wastewater; (b) adjusting the pH of said system to achieve hydroxide precipitation of said heavy metal in said industrial wastewater; (c) adding an effective amount of a water soluble ethylene dichloride- ammonia polymer having a molecular weight of from about 500 to about 10,000 daltons that contain from about 5 to about 50 mole percent of dithiocarbamate salt groups to react with said heavy metals in said industrial wastewater system; (d) passing said treated industrial wastewater through a submerged membrane, wherein said submerged membrane is an ultrafiltration membrane or a microfiltration membrane; and (e) optionally back-flushing said membrane to remove solids from the membrane surface.

The invention relates to a method for preparing heavy metal chelating resin, in particular to a method for preparing silica gel supported dithiocarbamate heavy metal chelating resin and adsorption of heavy metals such as lead, cadmium, copper, mercury and the like by the resin. The method comprises the following steps of: reacting carbon disulfide with a polyamine compound to generate a dithiocarbamate compound; and grafting the dithiocarbamate compound onto the surface of silicon dioxide, wherein a halogen group is modified on the surface of the silicon dioxide. By the method, the adsorption capacity of dithiocarbamate chelating resin is effectively improved; and the problem that silica gel is dissolved due to too high alkalinity of a reaction system (pH value is more than 11), or the dithiocarbamate compound cannot be generated through reaction due to too low alkalinity (the pH value is less than 10) when a dithiocarbamate functional group is prepared by reacting the silica gel with the carbon disulfide in the conventional synthetic route is solved, wherein an amino group is modified on the surface of the silica gel.