100 results about "Reaction sequence" patented technology

Particles have an ultrathin, conformal coating are made using atomic layer deposition methods. The base particles include ceramic and metallic materials. The coatings can also be ceramic or metal materials that can be deposited in a binary reaction sequence. The coated particles are useful as fillers for electronic packaging applications, for making ceramic or cermet parts, as supported catalysts, as well as other applications.

The present invention provides a microorganism useful for biologically producing 1,3-propanediol from a fermentable carbon source at higher yield than was previously known. The complexity of the cofactor requirements necessitates the use of a whole cell catalyst for an industrial process that utilizes this reaction sequence to produce 1,3-propanediol. The invention provides a microorganism with disruptions in specified genes and alterations in the expression levels of specified genes that is useful in a higher yielding process to produce 1,3-propanediol.

Particles have an ultrathin, conformal coating are made using atomic layer deposition methods. The base particles include ceramic and metallic materials. The coatings can also be ceramic or metal materials that can be deposited in a binary reaction sequence. The coated particles are useful as fillers for electronic packaging applications, for making ceramic or cermet parts, as supported catalysts, as well as other applications.

The present invention concerns a process for producing homogeneous polyethylene materials and processes for making high density, medium density and low density films therefrom. The process involves producing a polyethylene composition in a multistage reaction sequence of successive polymerization stages in the presence of an ethylene-polymerizing catalyst system. According to the invention, the process is carried out using an unsupported catalyst having magnesium and titanium as active constituents, in at least one loop polymerization stage and at least one gas phase polymerization stage and, operated with different amounts of hydrogen and comonomers to produce a high molecular weight portion in one of the polymerization stages and a low molecular weight portion in another so as to provide a polyethylene composition with the low molecular weight part having a MFR2 of 250 g/10 min or more. With this process it is possible to obtain homogeneous bimodal polyethylene material.

The invention discloses a photoinduced electrochemical biological sensor with advantages of simple operation and high flux, which is successfully applied to simultaneously detect three types of cancer cells. The photoinduced electrochemical biological sensor is characterized in that a layer of gold nanoparticles is modified onto the surface of paper fiber through gold nanometer self-catalytic reduction; then, preparing cadmium sulfide-graphene-zinc oxide bar ternary composite materials at the surface of a paper working electrode which are modified by long gold, and using as photo-electrodes; using chemical light emitting to replace the traditional xenon lamp; by controlling the chemical light emitting reaction sequence, sequentially exciting photo-electrodes; sequentially detecting three photo-current peaks, so as to simultaneously detect the three types of cancer cells.

The invention relates to a medical polyacrylate pressure-sensitive adhesive with high adhesion performance. The medical polyacrylate pressure-sensitive adhesive comprises soft monomers, hard monomers, functional monomers, initiators, cross-linking agents and solvents. The glass-transition temperature of the soft monomers ranges from -65 DEG C to -60 DEG C. The cross-linking agents are isocyanate-group-containing compounds generated through the reaction between polyisocyanates and polyhydroxy compounds. The weight-average molecular weight of the pressure-sensitive adhesive ranges from 80*10<4> g/mol to 140*10<4> g/mol. The molecular weight distribution of the pressure-sensitive adhesive ranges from 10 to 25. In the preparing process of the pressure-sensitive adhesive, temperature and the reaction sequence and the adding quantity of the reaction materials are gradually controlled, and the product with the high molecular weight and the wide molecular weight distribution is obtained. The product can be used for the medical and health field.

A method for successfully heat treating magnet coils of braided Bi₂Sr₂Ca₁Cu₂O_x (Bi-2212) strand. The Bi-2212 coil is fabricated using standard round wire powder-in-tube techniques, and braided with a ceramic-glass braid with integrated carbonaceous binder. The coil is heated in an atmosphere controlled furnace below the high current density phase reaction sequence to burn off the carbonaceous binder and evacuated to remove unwanted gases from the inner windings. The oxygen environment is then reintroduced and the coil is heat treated to the high J_c reaction temperature and then processed as normal. As the local atmosphere around the surface of the wire, particularly the concentration of oxygen, is critical to a successful reaction sequence, high current Bi-2212 coils can thereby be obtained.

The invention relates to a new method for continuously operating to synthesize capecitabine, which is characterized in that 5-flucytosine is subjected to acylation, condensation and hydrolysis to synthesize the capecitabine. The invention has the advantages of reasonable reaction sequence, continuous operation of three steps, operation simplification, high yield, low cost and less pollution.

The wastewater treatment system according to the present invention includes a plurality of reaction sequences including a first sedimentation tank, a reaction tank, a final sedimentation tank, a first channel which connects the first sedimentation tank and the reaction tank and a second channel which connects the reaction tank and the final sedimentation tank. In one reaction sequence of the plurality of reaction sequences, the reaction tank has a membrane separation tank including a carrier, a membrane unit, and activated sludge and in which an MLSS concentration of the activated sludge is in a range of 500 mg/L to 7000 mg/L, and wastewater is supplied to the reaction tank via the first channel, and wastewater in a quantity exceeding a treatment capacity of the reaction tank is supplied to the final sedimentation tank via the second channel.

The invention relates to a method of chemically synthesizing moxidectin and belongs to the field of medicinal chemistry. The method comprises the following step: carrying out a reaction on nemadectin as a raw material and 4-chlorophenoxyacetyl chloride as an upper protective agent, and preparing moxidectin through a reaction of four steps: upper protection, oxidization, oximation and deprotection, wherein the reaction sequence of oximation and deprotection can be interchanged without affecting the final reaction product. In the reaction process, the products in upper protection, oxidization and oximation can be recrystallized and extracted through methanol and the like, so that the requirements on the purity of the raw material is reduced, the operating flow is simplified and the reaction cost is lowered.

The invention relates to a high-resilience foam material containing rich PAPI (polyaryl polymethylene isocyanate) polyurethane, which is composed of a component A and a component B in a weight ratio of 100:(50-70). The component A is composed of 33-60% of polyether 330N, 33-60% of polymer polyalcohol, 0.5-1.5% of silicon oil, 0.2-0.8% of catalyst A33, 0.2-0.8% of catalyst A-1, 0.5-3.0% of diethanolamine, 3-10% of polyalcohol assistant and 2.5-6% of water. The component B is composed of 0-40% of toluene diisocyanate and 60-100% of polymethylene polyphenyl isocyanate. By using the raw materials containing multiple active hydrogens as an initiator and the polyalcohol prepared by polymerization reaction between the epoxypropane and epoxyethane at high temperature as a modifier, the foaming reaction sequence of the MDI (methylenediphenyl diisocyanate) base (PAPI) foam is regulated, so that the prepared foam mainly composed of MDI base (PAPI) has the advantages of high resilience, high foaming ratio, high elongation percentage and high tearing strength, and more importantly, has favorable tactile sensation.

The invention provides lateral chromatographic test paper for chemical detection. The test paper is assembled according to a lateral chromatographic structure based on a reaction sequence of the chemical detection. The test paper comprises a detection reaction condition preparation area, a detection color development area and a water absorption area which are successively arranged on a bottom plate, wherein the detection reaction condition preparation area is qualitative filter paper, quantitative filter paper, glass cellulose membrane, water absorption paper or polyester cellulose membrane test paper loaded with a reaction reagent, and the detection color development area is qualitative filter paper, quantitative filter paper, glass cellulose membrane, water absorption paper or polyester cellulose membrane. The test paper is uniform in color development, capable of solving the problem in the existing detection method that various reaction reagents cannot coexist on a piece of paper and breaking the limitation of the chemical detection test paper, and is more reliable in detection result.

A low-temperature pyrolysis device for coal is characterized by comprising a feeder, a reactor, a dust remover and a separating tower according to the reaction sequence, wherein the feeder is used for providing raw coal for the reactor; the reactor is used for conducting pyrolysis on the raw coal; the dust remover is used for conducting dust removing treatment on volatile substances generated during the pyrolysis of the reactor, and is heated all the time during the working process; and the separating tower is used for separating the volatile substances treated with dust removing. The low-temperature pyrolysis device has the advantages that pipeline blockage can be reduced, so as to ensure stable and efficient low-temperature pyrolysis for the coal; and as the comparatively purer volatile substances treated by the dust remover are prevented from being heated again, the purposes of energy conservation, environmental protection and very high efficiency are realized.

The invention relates to an absorption-separation integrated cyclone reactor for desulfurizing sulfur-containing gas and belongs to the field of cyclone reactors for desulfurizing sulfur-containing gas. The cyclone reactor is characterized in that the outlet end of a mixing chamber (3) is sequentially communicated with a reaction mechanism and a separation mechanism in a reaction sequence; air inlet pipes are tangentially arranged at the upper part of the mixing chamber (3); first atomizing nozzles (2) are inserted onto the air inlet pipes; first level guide blades (4) are arranged between the mixing chamber (3) and the reaction mechanism; second level guide blades (8) are arranged between the reaction mechanism and the separation mechanism; each of the mixing chamber (3), the reaction mechanism and the separation mechanism comprises a cavity with a gradually varied inner diameter. The device provided by the invention integrates desulfurization and separation of sulfur containing gas and an absorption liquid. The gas-liquid contact area is increased and the gas-liquid transfer speed is accelerated by virtue of a high turbulence level of a swirling flow field, so that hydrogen sulfide in the sulfur containing gas is quickly absorbed, the reaction efficiency is effectively enhanced, and the reaction space is saved.

The invention relates to a novel technology for synthesis of capecitabine. The technology is characterized in that: 5-fluorocytosine protected by trimethyl silicon is taken as raw material; and the capecitabine is obtained after condensation, esterification and deacetylation. The Reaction sequence is more economically reasonable, the synthetic route is short, the cost is low, the operation is simplified, the yield is high, the synthetic period is short, the quality of intermediates can be controlled, solvents used in reaction are few, pollution to the environment is little, and the technology is suitable for industrial production. Comparing the technology with the prior art for capecitabine production, trimethylsilyl trifluoromethanesulfonate (TMSOTf) which replaces a heavy metal agent stannic chloride is used as a condensing agent for glycosylation (condensation), and a sodium methoxide/methanol system replaces an ammonia gas/methanol system for deacetylation, so that the production yield is increased, and heavy metal residues of the products and the environmental pollution are reduced. The overall yield of the technology of the invention reaches 59%, the purity of the production is high and meets the standards of the United States Pharmacopeia.

The invention provides a water-soluble organic silicon modified polyester resin. A preparation method of the water-soluble organic silicon modified polyester resin comprises the following steps: putting reaction raw materials, namely 26-50 parts by weight of polyhydric alcohols, 10-63 parts by weight of polysiloxane, 17-40 parts by weight of polyatomic acids and 0.01-0.05 part by weight of a titanate catalyst, into a reactor, and introducing nitrogen into the reactor; after a reaction is completed, carrying out end sealing with 5-10 parts by weight of an end sealing agent, further adding 10-25parts by weight of a diluent to carry out a reaction, and controlling conditions such as reaction temperatures and reaction sequences in each step, thereby obtaining the water-soluble organic siliconmodified polyester resin. The invention further provides a water-soluble coating. The water-soluble organic silicon modified polyester resin provided by the invention has good glossiness, transparency and adhesive force, and in addition has good water solubility and thermal resistance.

The invention provides a treatment method for tank bottom oil sludge. The method comprises the following steps: step one, performing water adding and mixing treatment on the oil sludge, enabling the solid content of the oil sludge to reach 4-15%; step two, adding sodium hydroxide solution to adjust a pH value to be 7.5-9; step three, adding a non-ionic surfactant and stirring in a high speed; andstep four, pumping into a clarification tank for precipitation separation. The provided treatment method for the tank bottom oil sludge is simple in reaction condition, convenient in operation, and capable of combining a demulsifying agent, the surfactant and an alkaline water washing technology in a specific reaction sequence and the reaction condition, realizing the rapid separation of the oil sludge, enabling a deoiling rate to reach 95% or more, and reducing the pollution of the oil sludge to the environment.

This invention relates to a process for preparing 4-[(1,6-dihydro-6-oxo-2-pyrimidinyl)-amino]benzonitrile (I) starting from a 4-oxo-1,6-dihydro-pyrimidinylcarboxylic acid ester (II) or starting from a guanidine derivative which is reacted with an alkoxy-methylene malonic acid ester to an ester (II) which is converted to (I), which reaction sequence may be a one-pot procedure.