45 results about "Acetylide" patented technology

A conductive film comprising: a support; a particle-containing layer; and a metal thin film layer, in this order, wherein the particle-containing layer contains particles having a mean particle size of from 1 to 10 μm and a heat decomposed material of a metal acetylide and has irregularities derived from a shape of the particles formed on a surface thereof, and the the metal thin film layer contains a metal element.

A process for producing ethyne by dry method is carried out by: mixing water with calcium acetylide powder in proportion of 1.1-1.9:1, and spraying water on calcium acetylide powders in ethyne generator and hydrolyzing to generate ethyne. Calcium acetylide rate at outlet of residual slag machine is 99.5-99.85 wt%, ethyne recovery rate reaches to 98.5 wt%, water content of calcium acetylide slag is 4-12 wt%, reactive temperature is set between 87-93 deg.C and water content is 75%. It's safe, continuous, simplified and cheap.

An anhydrous chloride with a formula of MCl₂ (M=Fe, Co or Ni) is dissolved into an anhydrous acetonitrile solvent to form a chloride-acetonitrile solution. Then, calcium carbide minute powders are added and dispersed in the chloride-acetonitrile solution to form a reactive solution. Then, the reactive solution is thermally treated (first thermal treatment) to form a nano-powder made of a transition metal acetylide compound having an M-C₂-M bond, a tetragonal structure, and a formula of MC₂ (herein, M=Fe, Co or Ni). Then, the nano-powder is thermally treated (second thermal treatment) again at a temperature higher than the temperature in the first thermal treatment to form a carbon layer-covering transition metallic nano-structure wherein a metallic core made of the transition metal M is covered with a carbon layer.

The invention provides a method for synthesizing 7-Acetyleno quinone methide compounds that is safe and inexpensive. The method avoids the need for extremely cold reaction temperatures and unlike the prior art does not require any highly explosive materials. The method comprises the steps of

• • a) performing a condensation reaction between 3,5-di-tert-butyl-4-hydroxybenzaldehyde and a secondary amine thereby forming a secondary amine quinone methide intermediate;
  • b) removing water from the secondary amine quinone methide intermediate by azeotropic distillation;
  • c) adding the dehydrated secondary amine quinone methide intermediate to an organic medium containing a metal acetylide to form a Mannich base intermediate; and
  • d) adding a release agent to the Mannich base intermediate to yield a 7-Acetyleno quinone methide.

The invention discloses a preparation method of ulipristal acetate and an intermediate thereof, and belongs to the field of pharmaceutical synthesis. The preparation method of the ulipristal acetate comprises the following steps: by taking 3,3-(ethylenedioxy)-19-methylestra-5(10),9(11)-diene-3,17-diketone as raw material, enabling the raw material to react with sodium acetylide or potassium acetylide to obtain a compound III, carrying out high-selectivity epoxidation by oxide to obtain a compound IV, subsequently enabling the compound IV to react with 4-(N,N-dimethyl amino) phenyl magnesium bromide Grignard reagent to obtain a compound V, then enabling the compound V to react with phenyl sulfonic acid chloride to obtain a compound VI, enabling the compound VI to respectively react with sodium methoxide and trimethyl phosphate to obtain a compound VII, hydrolyzing and removing a protection group to obtain a compound VIII, finally carrying out acetylation reaction to obtain the ulipristal acetate, wherein the reaction formulae are as shown in the description. The method is short in synthetic route, mild in reaction conditions, high in yield and purity of products, low in cost, stable and controllable in quality, and is suitable for industrial production.

This invention provides for the removal of mercury from a mixture of saturated and unsaturated hydrocarbons such as from cracked gas. The gas first is contained in a regenerable adsorbent bed that removes water and mercury and then the regenerant stream for the adsorbent bed is passed through a nonregenerable bed comprising copper sulfide to trap the mercury. Surprisingly, it was found that acetylene within the regenerant stream does not react with the copper sulfide to produce explosive copper acetylides.

An acetylide-form propargyl-containing resin composition for cationic electrocoating, which comprises a resin having a skeleton of epoxy resin and has a number average molecular weight of 500 to 20,000, and which contains, per 100 grams of the resin composition solids, 5 to 400 millimoles of sulfonium group and 10 to 495 millimoles of propargyl group, the total content of the sulfonium and propargyl groups being not more than 500 millimoles per 100 grams of the resin composition solids, said propargyl group being partly in the form of an acetylide. This resin composition may further contain unsaturated double bonds.

The invention provides a process for the preparation of 6,6-dimethylhept-1-en-4-yn-3-ol comprising of reacting t-butylacetylene with a proton-extracting agent selected from the group consisting of an organometallic compound and metallic lithium to form a t-butylacetylide, reacting the acetylide with acrolein at temperatures between -40° C. to +20° C., quenching the reaction mixture and isolating the product.

The present invention relates to a series of platinum acetylide nonlinear optical chromophores which are liquid at room temperature. The viscosity of these liquid chromophores is low enough that they are easily processable into optical cells and can be used for nonlinear optical applications. The compounds remain liquids below room temperature, converting to a glass in the range of from about −80° C. to −100° C. Neat liquids have a high chromophore concentration (˜1 Mole/liter) making possible the development of optical devices requiring materials with a high chromophore concentration.

The invention discloses a method for preparing 1,4-butynediol. The method comprises the steps that firstly, a copper catalyst is activated to obtain a copper acetylide/bismuth catalyst, acetylene and formaldehyde are subjected to a reaction under the effect of the copper acetylide/bismuth catalyst to obtain a 1,4-butynediol and copper acetylide/bismuth catalyst mixed solution, and in a reaction kettle, the mixed solution is filtered through a metal film filter to obtain a 1,4-butynediol clear solution which is fed outside the reaction kettle to be subjected to follow-up technological treatment to obtain a finished product. In the reaction process, copper acetylide/bismuth catalyst turbid liquid is extracted periodically, then, an equimolar copper acetylide/bismuth catalyst or a copper catalyst is supplemented, a clear solution obtained after the extracted copper acetylide/bismuth catalyst turbid liquid is filtered is subjected to the follow-up technological treatment to obtain a finished product finally, and copper acetylide/bismuth catalyst cakes are subjected to a regeneration procedure to be recycled; the 1,4-butynediol clear solution is adopted for performing back flushing on the metal film filter periodically. Due to periodic extraction and supplementing of the catalyst, production losses caused by frequent stopping are avoided, and the product yield and output are improved.

A low-workfunction photocathode includes a photoemissive material employed as a coating on the photocathode. The photoemissive material includes A_nMC₂, where A is a first metal element, the first element is an alkali metal, an alkali-earth element or the element Al; n is an integer that is 0, 1, 2, 3 or 4; M is a second metal element, the second metal element is a transition metal or a metal stand-in; and C₂ is the acetylide ion C₂²⁻. The photoemissive material includes a crystalline structure or non-crystalline structure of rod-like or curvy 1-dimensional polymeric substructures with MC₂ repeating units embedded in a matrix of A.

The invention discloses a preparation method for a rosuvastatin calcium intermediate. The preparation method comprises the following steps: adding Salen Co (III) in a sodium acetylide tetrahydrofuran solution, dropwise adding epichlorohydrin for reaction, dropwise adding a product into a sodium cyanide aqueous solution for reaction to obtain a product, and dropwise adding the obtained product into methanol and introducing hydrogen chloride to obtain (3R)-hydroxyl-methyl 5-octynoate (III); with dichloromethane as a solvent, adding the compound (III) and tert-butyldimethylsilyl chloride to obtain a compound (IV), dropwise adding the compound (IV) into a sodium hypochlorite aqueous solution to obtain 6-chloro-(R)-(+)-3-(tert-butyldimethylsilanyloxy)-5-oxo-methyl caproate (V); with 2-methyltetrahydrofuran as a solvent, adding 6-chloro-(R)-(+)-3-(tert-butyldimethylsilanyloxy)-5-oxo-methyl caproate and triphenylphosphine so as to obtain methyl (3R)-(tert-butyldimethylsilanyloxy)-5-oxo-6-triphenylphosphoranylidenehexanoate(VI). According to the preparation method provided by the invention, the raw materials are simple, the reaction conditions are mild, environment friendliness is realized and the preparation method can be used for industrial mass production.

The invention relates to a synthesis method of end-group alkyne, which comprises the steps of: mixing solvent and lithium acetylide ethylenediamine; cooling the solution to -10 to 10 DEG C when the solution is clear, and then adding haloalkane into the cooled solution; leading the molar ratio between the lithium acetylide ethylenediamine and the haloalkane to be 1: 1-2: 1, and controlling the temperature to be -20 to 20 DEG C and the reaction time to be 0.5-5h; and finally, extracting, washing, distilling, collecting fraction with the boiling point close to that of the product, and obtaining a finished product. Compared with the prior art, the synthesis method has the advantages of simple method, convenient operation, high yield and the like.

The invention discloses a method for in-situ generation of a diamond-like film precursor, and relates to the technical field of coating. According to the method, through a molten salt medium electrolyzing method, acetylene compounds are generated in an electrolytic tank by the chemical reaction to serve as precursors of carbon, and personal injury and environmental harm caused by use of industrial acetylene compounds are avoided. The provided preparation method for in-situ generation of the diamond-like film precursor is simple and feasible, and the concentration of the prepared acetylene compounds is relatively high.

The invention discloses a method for treating industrial catalytic waste copper acetylide. The method is characterized in that the method comprises the following steps that a, industrial catalytic waste copper acetylide slurry is taken and put into a container, distilled water with a mass of 1-1.5 times of the copper acetylide slurry is added, and stirred evenly; b, hydrogen peroxide with a mass of 0.15-0.5 times of the copper acetylide slurry is added into the container and stirred evenly; c, a diluted acid solution with a concentration of 15%-30% is added into the container, stirred, reactedat room temperature for 5h, and reaction gas is collected with an air bag; d, after the reaction, an alkali solution is added to adjust a pH value of a reaction solution to 11-12, then the reaction residue is centrifugated, washed for three times, and the obtained centrifugal solution can continue to be recycled; and e, residue samples are obtained by drying at 60 DEG C, and whether the deflagration exists or not in a muffle furnace at 150 DEG C is observed.

A synthesis process for ethynyl compounds - an intermediate of a coenzyme Q10. This invention is for improving existing techniques problems of high cost for ethynylation, apparent safety risk and environmental pollution etc. The main points of the technique: during the preparation process of coenzyme Q10 from semi-synthesis method, the solane-acetone through ethynylation from introducing ethynyl to produce 3-methyl-solane-butynyl-1-alcohol-3 synthesis technique. The synthesis technique is characterized by fist adding appropriate sodium hydroxide or potassium hydroxide alcohol solution and toluene into a reaction vessel, heating and refluxing reactants to make the reaction completely, separating water, the reaction liquid cooled down, ethyne going through the solution to get a ethyne reaction solution, adding the solane-acetone solution into the ethyne reaction solution to make the reaction happen, after the reaction, adding appropriate water, cooling and neutralizing with acidic solution, separating water and organic layer, washing the organic layer with water, heated to remove organic solvent, 3-methyl- solane-butynyl-1-alcohol-3 is produced.

The invention relates to a d10 transition metal acetylide two-dimensional nanosheet and a preparation method thereof. The d10 transition metal acetylide two-dimensional nanosheet has a monocrystal structure, and the mole ratio of d10 transition metal and alkyne source in the d10 transition metal acetylide is 1: 1-1: 1.2. The d10 transition metal acetylide two-dimensional nanosheet has monocrystal structure, uniform thickness, and good dispersing property. Due to the specific conjugated structure of quasi-graphene, the structure makes that the material has high in-plane carrier concentration, and can be used as promoter for supporting electronic conduction or two-dimensional photoelectricity sensing material; the nanosheet is expected to apply to catalyst, photoelectricity, biology and other domains.