226 results about "Gold Compounds" patented technology

Disclosed is a catalyst. The catalyst comprises palladium, gold, and a support comprising titanium dioxide and tungsten trioxide. The support preferably comprises from 75 wt % to 99 wt % of titanium dioxide and from 1 wt % to 25 wt % of tungsten trioxide. A method for preparing the catalyst is also disclosed. The method comprises impregnating the support with a palladium compound and a gold compound, calcining the impregnated support, and then reducing the calcined support. Further disclosed is a method for preparing vinyl acetate with the catalyst. The catalyst exhibits improved catalytic activity and selectivity.

Methods for the production of monoclonal antibodies specific to conformational epitope(s) of a prefibrilar aggregate(s) which contribute to amyloid fibril formation in human or animal subjects who suffer from amyloid diseases (e.g. Alzheimer's Disease) and the hybridomas and monoclonal antibodies produced therefrom. Also, the use of such monoclonal antibodies in the immunization of human or animal subjects against Alzheimer's Disease or other amyloid diseases and/or for the diagnosis or detection of Alzheimer's Disease or other amyloid diseases. The monoclonal antibodies may be administered concomitantly or in combination with anti-inflammatory agents, such as gold or gold containing compounds, to decrease neural inflammation associated with amyloid diseases (e.g. Alzheimer's Disease).

The invention relates to a processing method of stainless steel pickling waste liquid, which is characterized in that the processing method includes the steps that: neutral salt wastewater flows into a neutral reduction cell, and mixed acid pickling waste waters flow into a neutralizing tank; reducing agent is added into the neutral reduction cell, and then the reduced wastewater liquid is put into the neutralizing tank and is mixed with the adjusted mixed acid pickling waste waters, and liquid alkali is added into the neutralizing tank; the separated clear waste liquid removes fluorin ions in a settlement tank; neutralizing liquid is added into a final neutralizing tank to cause the pH value of treatment liquid to adjust to be neutralized wastewater liquid which passes through a sand filter to be discharged. The processing method has the advantages that metal ions and fluorin ions are performed the subsection treatment, and neutralizing agent is changed into the liquid alkali from lime cream, the requirement of reaching the standard of the waste liquid emission is not only achieved, but also the mud quantity produced by a mass of lime cream is greatly reduced, heavy metal mud of a retention pond only contains heavy metal compound, the salts of calcium fluoride and calcium sulphate, etc. are separated from the inclined plate settlement tank during the fluoridation stage, thereby the treatment cost is effectively lowered.

A method is disclosed for fabricating a integrated device, such as a MEMS device. A first wafer is provided on an exposed surface with a layer of gold, gold alloy or gold compound. A second wafer is provided on its exposed surface with under-layer of gold, gold alloy or gold compound; and an over- of bismuth, bismuth alloy, a compound of bismuth, cadmium, cadmium alloy, a compound of cadmium compound, tin, tin alloy, or a compound of tin. The wafers are then brought into contact and bonded at their surfaces through the deposited layers.

The present invention provides an excellent non-electrolytic gold plating liquid which produces a gold plating layer firmly adhered to a surface selected from the group consisting of nickel, cobalt, palladium or a metal alloy containing nickel, cobalt or palladium, as well as a method for performing a non-electrolytic gold plating method using the non-electrolytic gold plating liquid. The non-electrolytic gold plating liquid comprises:(1) a water-soluble gold compound;(2) a complexation agent which stabilizes a gold ion in the plating liquid, but does not substantially dissolve nickel, cobalt or palladium; and(3) an anti-gold deposit agent which inhibits excess local etching or corrosion by substitution reaction between the metal surface and gold during the gold plating.

A process of preparing gold-coated magnetic nanoparticles is disclosed and includes forming a suspension of magnetic nanoparticles within a suitable liquid, adding an amount of a reducible gold compound and a reducing agent to the suspension, and, maintaining the suspension for time sufficient to form gold-coated magnetic nanoparticles.

A process for the production of a catalyst for preparing vinyl acetate in the gas phase from ethylene, acetic acid and oxygen or oxygen-containing gases which catalyst comprises palladium and/or its compounds, gold and/or its compounds and also alkali metal compounds on a particulate, porous support obtained by a) impregnating the support with soluble palladium and gold compounds, b) converting the soluble palladium and gold compounds into insoluble palladium and gold compounds by addition of an alkaline solution to the support. c) reducing the insoluble palladium and gold compounds on the support with a reducing agent in the liquid or gaseous phase, d) impregnating the support with at least one soluble alkali metal compound and e) finally drying the support at a maximum of 150 DEG C., wherein the catalyst is brought into contact with at least one peroxidic compound in step b).

The invention provides a porous solid material supported ionic liquid-gold catalyst, as well as preparation and application thereof. The catalyst comprises a porous solid material carrier and a complex which is prepared from an ionic liquid and a metal ionic compound and is loaded on the carrier surface, wherein the metal ionic compound is a gold compound or a combination of a gold compound and a third metal chloride; the gold compound is selected from one of gold chloride, chloroauric acid, ethylenediamine gold chloride, chloro(triphenylphosphite)gold and chloro(triethylphosphine)gold; the third metal is selected from one of Cu, In, Bi, Ba, Sr, Fe, Mn, Zn, Co, Cs, K, Ca, Sn and Ni; and the ionic liquid is an imidazole ionic liquid. The porous solid material supported ionic liquid-gold catalyst has good chemical and thermal stability and high heat transmission efficiency in the reacting atmosphere for synthesizing vinyl chloride by ethyne hydrochlorination, and has the characteristics of high catalytic activity, high selectivity, good stability, low cost and the like.

An electroless gold plating bath includes a water-soluble gold compound, a completing agent, an aldehyde compound, and an amine compound represented by R₁—NH—C₂H₄—NH—R₂ or (CH₂—NH—C₂H₄—NH—CH₂)_n—R₄ (wherein R₁ to R₄ represent —OH, —CH₃, —CH₂OH, —C₂H₄OH, —CH₂N(CH₃)₂, —CH₂NH(CH₂OH), CH₂NH(C₂H₄OH), —C₂H₄NH(CH₂OH), —C₂H₄NH(C₂H₄OH), —CH₂N(CH₂OH)₂, —CH₂N(C₂H₄OH)₂, —C₂H₄N(CH₂OH)₂ or —C₂H₄N(C₂H₄OH)₂, and n is an integer of 1 to 4).

The electroless gold plating can be carried out without corrosion of an underlying metal to be plated at a stable deposition rate. Because of the high deposition rate and the immersion and reduction types, thickening of a plated coating is possible in one solution and the color of the coating is not degraded to provide a good appearance while keeping a lemon yellow color inherent to gold.

The invention discloses an acetylene-hydrochlorinated low-content gold compound catalyst, particularly a nonmerculic catalyst which is suitable for synthesis of chloroethylene through an acetylene hydrochlorination reaction. The catalyst comprises carrier active carbon, a main catalysis element and auxiliary elements A and B, wherein the content of the carrier active carbon is 10,000 parts, the main catalysis element is thiosulfate of gold with the content of 1-120 parts, the auxiliary element A is thiosulfate of silver with the content of 50-1,000 parts, the auxiliary element B is alkali metal compound and a mixture of the alkali metal compounds with the content of 50-1,000 parts. According to the acetylene-hydrochlorinated low-content gold compound catalyst disclosed by the invention, the content of gold in the prepared gold compound catalyst is low; the cost of noble metal catalyst is remarkably reduced; the prepared gold compound catalyst is a good-activity, strong-stability and high-selectivity novel nonmerculic catalyst; and the acetylene-hydrochlorinated low-content gold compound catalyst has the advantages of simple production process, short production period and environment-friendliness.

Electroless gold plating baths and plating methods using these baths are provided. The electroless gold plating bath includes i) water-soluble gold compound, ii) complexing agent that stabilizes gold ions in the plating bath, but does not cause substantial dissolution of nickel, cobalt or palladium in the plating bath, and iii) a polyethyleneimine compound. When a material to be plated is subjected to such a gold plating bath, corrosion of the base metal under the surface of the material to be plated is reduced by controlling the substitution reaction rate immediately after initiation of the reaction, and adhesion between the base metal and deposited gold coating is increased.

A method for making a fluorescent gold nano-material having a gold nanocluster and thiol ligands on a surface of the gold nanocluster includes reacting a mixture of a gold-containing compound, an alkyl alcohol, and a thiol compound.

A cyanide-free immersion type electroless gold plating solution that is less toxic, that can be used at near neutrality, and that gives an excellent and improved solder adhesion and plated film adhesion is provided. An electroless gold plating solution, comprising a cyanide-free water-soluble gold compound, a pyrosulfurous acid compound and a thiosulfuric acid compound. This plating solution preferably further contains a sulfurous acid compound and an aminocarboxylic acid compound. Pyrosulfurous acid and alkali metal salts, alkaline-earth metal salts, ammonium salts and other salts thereof can be used as the pyrosulfurous acid compound.

The invention belongs to the field of anionic type gold complex, and specifically provides an anionic type gold complex and an application thereof. The complex is characterized in that: a complex anion [AualphaLm]<-phi> formed by gold and a ligand contanining no free cyanogen (also known as complexing agent) L is adopted as a core component. Phi is the negative charge number of the complex anion [AualphaLm]<-phi>. The general chemical formula of a corresponding gold compound is Mr[AualphaLm]q.bH2O. L represents the ligand containing no free cyanogens, m represents a coordination number, M and r respectively represents an anion and a number thereof, b represents the number of crystal water, and alpha, m and phi are positive integers which are not 0. With a coordination reaction of a material containing gold and a material containing the ligand L, the compound can be prepared. The compound can be applied in fields such as electroplating and chemical plating.

The invention provides a catalyst for synthesizing vinyl chloride, a preparation method of the catalyst and a vinyl chloride synthesis method, and belongs to the field of organic synthesis. The catalyst comprises an active center, an aid and a carrier, wherein the active center is one or more of a gold compound, a ruthenium compound, a palladium compound and a copper compound; the carrier is activated carbon fiber; the aid comprises a metal aid and/or a nonmetal aid. The catalyst has higher catalytic activity and stability. Results of embodiments show that the catalyst has better effect, the acetylene conversion rate is 63.35%-99.97% and vinyl chloride selectivity is 100% at the initial reaction stage; after 6,000 hours of reaction, the acetylene conversion rate is 62.56%-99.85%, and vinylchloride selectivity is 99.9%.

The invention provides a process for the production of a supported gold catalyst suitable for catalysing the oxidation of carbon monoxide to carbon dioxide. A porous support is impregnated with a solution of gold compound and with a basic solution, using an incipient wetness impregnation technique, such that gold hydroxide is precipitated in the pores of the support. The impregnation step is carried out using a compound comprising chloride. The chloride is then removed from the sample. Surprisingly, the catalyst formed by the process is effective in catalysing the oxidation of carbon monoxide to carbon dioxide at room temperature.

An electroless gold plating bath includes a water-soluble gold compound, a complexing agent, a formaldehyde metabisulfite adduct, and an amine compound represented by R₁—NH—C₂H₄—NH—R₂ or (CH₂—NH—C₂H₄—NH—CH₂)_n—R₄ (wherein R₁ to R₄ represent —OH, —CH₃, —CH₂OH, —C₂H₄OH, —CH₂N(CH₃)₂, —CH₂NH(CH₂OH), —CH₂NH(C₂H₄OH), —C₂H₄NH(CH₂OH), —C₂H₄NH(C₂H₄OH), —CH₂N(CH₂OH)₂, —CH₂N(C₂H₄OH)₂, —C₂H₄N(CH₂OH)₂ or —C₂H₄N(C₂H₄OH)₂, and n is an integer of 1 to 4).

A gold plated coating of a good appearance can be formed without causing a failure in appearance owing to the progress of intergranular corrosion in a nickel surface.

The invention relates to a vinyl acetate catalyst, and aims to solve the problem that a current vinyl acetate catalyst has low activity and selectivity. According to the preparing method, the vinyl acetate catalyst is adopted, SiO2, Al2O3 or the mixture of the SiO2 and the Al2O3 is used as a carrier, and a loading activity component comprises metal palladium, metal gold, alkali metal acetate and at least one kind of dendritic macromolecular compound in compound 1 and compound 2 specified in the following formula, wherein the catalyst comprises 1-12g/L of palladium, 0.1-10g/L of gold, 10-100g/L of alkali metal acetate and 0.1-2.0 g/L of dendritic macromolecular compound and E t1-E t 16 are independently chosen from a technical scheme of C1-C3 alkyl group. During the preparing process of the vinyl acetate catalyst, the dendritic macromolecular compound is added after dipping palladium compound and gold compound and before a reduction step during the preparing of the catalyst.

Presented is methods to make high quality anode zinc pellets without adding lead by continuous or non-continuous casting and rolling method in high productivity. Disclosed is full details of material and process engineering as regards alloy compound, process machinery or equipment, and test and evaluation method addressing metallographic aspect in addition to chemical factors.

An object of the present invention is to provide an electroless displacement gold plating solution, an additive for use in preparing the plating solution, and a metal composite material obtained by treatment with the plating solution. The present invention provides an electroless displacement gold plating solution containing a water-soluble gold compound, a complexing agent, and a water-soluble silver compound, and optionally a water-soluble thallium compound, a water-soluble lead compound, a water-soluble copper compound or a water-soluble nickel compound, or any combination thereof. The plating solution has good stability and, even not only immediately after the preparation but also after a lapse of a certain time period from the preparation, can be used for production of a metal composite material exhibiting a even plated appearance and also having a thick gold coating film.

A carried catalyst for preparing vinyl acetate from ethane, acetic acid and oxygen contained gas is composed of the carrier (SiO2 and/or Al2O3) and active component (Pd, Au, Cu and alkali-metal acetate). It is prepared through immersing carrier in the aqueous solution of Cu compound, ageing, converting Cu compound to Cu, washing, drying, calcining in protective atmosphere, immersing in the solution of Pd and Au compounds, ageing, converting the Pd and Au compounds to Pd and Au, and immersing in the aqueous solution of alkali metal acetate.

The invention discloses a plated switch contact and a preparing method thereof. The switch contact is a combined body with a three-layer structure, the first layer is a hydrophobic rubber layer, the second layer is a sheet metal layer, the third layer is a plated layer, and a combination body of the first layer and the second layer is soaked in a chemical plating solution with a soluble gold compound and gold or gold alloy is selectively deposited on the surface of sheet metal in the combination body by a chemical deposit method to form the plated layer. According to the plated switch contact and the preparing method thereof, the prepared switch contact is suitable for heat vulcanization bonding and forming with rubber, and thereby, a rubber press key with the switch contact can be produced. The switch contact has the advantages that the resistance to atmospheric corrosion, contact chatter and arc erosion is good, the surface contact resistance is low, the service life is long, and the like.

The invention discloses a method for preparing and using an electrochemical immunosensor for aflatoxin B1 detection, including preparation of an electrochemical immunosensors and alflatoxin B1 detection of the electrochemical immunosensor. According to the preparation scheme, the preparation method comprises the following steps: preparing a nano-gold solution; preparing an activated glassy carbonelectrode; preparing a graphene oxide/thionine/nano-gold compound material; preparing a modified glassy carbon electrode; sealing the non-specific site with bovine serum albumin; and preparing a detection substrate. The method realizes quick, accurate and low-cost detection on aflatoxin B1.

The invention discloses a mercaptyl-terminated (2-dimethylamino ethyl) polymethacrylic ester polymer, a self-assembled and modified nano-gold compound (PDMAEMAGNPs) of the polymer as well as a compound of the polymer and plasmid DNA; and the invention also discloses preparation methods of the polymer and the compounds as well as the application of all in carrier as genes. When the concentration ofthe compounds of PDMAEMAGNPs and GFP DNA (green fluorescent protein expression DNA) is 30Mug/mL, the transfection efficiency to HEK 293T cell is 30 percent, and the survival rate to HEK 293T cell, HeLa cell and 293 cell is more than 80 percent. The PDMAEMAGNPs/CpG ODN (human CpG oligodeoxynucleotide) compound has remarkable effects in gene therapy in vitro and in vivo. The suppression ratio to tumor growth of the PDMAEMAGNPs/p53 DNA (tumor suppressor gene) is 30-37 percent.