66results about How to "Inhibition of lysis" patented technology

The invention relates to a catalyst for dehydrogenating propane to prepare propone, which uses thermal-resistant oxide as carrier, uses palladium-group metal as main catalyst, uses IV A group metal and rare-earth metal as agents, uses halogen as modifier, and uses inorganic oxide with high temperature resistance as adhesive. The inventive catalyst under high temperature and low pressure has higher propane transfer rate, propone selectivity and reaction stability. And the preparation comprises that at 60-100Deg. C, immerging thermal-resistant oxide with rare-earth metal water solution for 2-10h, at 60-180Deg. C baking for 2-10h, at 400-600Deg. C baking for 3-10h, immerging said carrier and the water solution which contains palladium metal and IVA metal at 60-100Deg. C for 2-10h, and baking for 2-10h at 60-180Deg. C, adding adhesive, protruding agent and acid gel solvent, protruding and shaping, baking for 2-10h at 60-180Deg. C, activating for 3-10h at 400-600Deg. C, and reducing for 2-10h in hydrogen flow at 400-600Deg. C.

The invention relates to a reformate deolefination method without hydrogen, which is mainly used for solving the problems in the prior art that deolefination refining agent is low in activity, short in service life and great in aromatic hydrocarbon loss. The technical scheme adopted by the invention is as follows: olefins in reformate are removed because of polymerization or alkylation reaction carried out on a catalyst for 0.3-20h<-1> at the temperature of 120-240 DEG C and under the pressure of 0.5-3.0 MPa, wherein the catalyst contains 0.1-10 parts by weight of at least one metal or oxide thereof selected from Ni, MO, Zr, and Nb, 0.01-2.00 parts by weight of at least one element or oxide thereof selected from Cl, Br and S, 0.05-5 parts by weight of at least one element or oxide thereofselected from F and P, 20-90 parts by weight of molecular sieve and 10-80 parts by weight of at least one selected from SiO2 and Al2O3 or a mixture thereof, thus the problems in the prior art are solved. The method can be used for industrial production of olefin reduction in reformate.

The invention discloses a propane dehydrogenation catalyst, which employs silica as a carrier, Pt as a dehydrogenation active component, and Sn and V as auxiliary agents. The catalyst comprises, by weight, 0.1-2% preferably 0.2-0.8%, of dehydrogenation active component, and comprises, calculated by the weight of the carrier, 0.1-10% preferably 1-5%, of the auxiliary agent Sn, and 0.1-10% preferably 1-5% of the auxiliary agent V. A preparation method of the propane dehydrogenation catalyst is by loading auxiliary agents Sn and V and the active component Pt by using silica gel as a carrier through an impregnation method. The method can substantially increase the activity stability and olefin selectivity of the catalyst.

The invention discloses a rapid fuel gas condensation system with double-tower direct spray, comprising a first stage spray tower, a second stage spray tower, a connecting pipeline communicated with the first stage spray tower and the second stage spray tower, at least one bio-oil storage tank connected with condensed bio-oil outlets of the first stage spray tower and the second stage spray tower, and at least one atomized spray sub-system. The atomized spray sub-system comprises a first atomized spray unit and a second atomized spray unit respectively arranged inside the first stage spray tower and the second stage spray tower partially and extensively. The first atomized spray unit and the second atomized spray unit respectively comprise two layers or more than two layers of spraying nozzles that are used for the atomized spray of condensed media and arranged at intervals in the height direction of the inner space of the first stage spray tower and the second stage spray tower. The system can fully inhibit the further schizolysis of condensable components and avoid the complicated process of subsequent separation caused by additional condensed media.

The invention relates to a reformate non-hydroisomerization olefin-reducing catalyst mainly solving the problems of low activity, short service life and big aromatic hydrocarbon loss of a olefin-reducing refining agent in the prior art. The invention well solves the problem through the technical scheme of adopting a novel catalyst comprising the following components in parts by weight: 10-90 parts of molecular sieve and 0.01-2.00 parts of at least one element selected from Cl, Br or S or an oxide thereof, 0.05-5 parts of at least one element selected from F and P or an oxide thereof and 10-90parts of aluminum oxide or silicon oxide binder by elements. The invention can be used for the reformate non-hydroisomerization olefin-reducing industrial production.

The invention discloses a method for producing phospholipase D through recombinant escherichia coli. According to the method, a phospholipase D gene is in preciseness-type starting sub control, a pararea of pSC101 is inserted in an expression plasmid, an escherichia coli mutant strain recA is used for keeping the genetic stability of the plasmid, cells containing the plasmid at the growth periodare cultured to high density, and saturation induction is conducted at the induction period; meanwhile, the temperature is decreased, alkali metal salt stress is applied, the cytotoxicity of PLD to ahost is reduced, cell lysis is inhibited, the synthesis time of PLD is prolonged, and accordingly PLD expression is improved.

The invention relates to a method for activating a light alkane dehydrogenation catalyst. The method mainly solves the problem that the conversion rate and selectivity of the existing platinum-containing light alkane dehydrogenation catalyst are low. The method comprises a) carrying out grading treatment on the catalyst in an air atmosphere, b) treating the catalyst containing 1 to 10mol% of O2 and 1 to 10mol% water vapor flows to promote redispersion of an active metal component Pt and a halogen Cl, and c) reducing the active metal component at 450 to 650 DEG C in a trace hydrogen sulfide/H2 reduction atmosphere so that the deactivated catalyst is completely activated. The method solves the problem and can be used in industrial production of light alkane dehydrogenation.

The invention provides a vaccine antigen composition. The vaccine antigen composition comprises a vaccine antigen and choline-type ionic liquid. According to the vaccine antigen composition, through addition of the choline-type ionic liquid with good biocompatibility as an additive, the heat stability, the repeated freeze-thaw stability, the accelerated stability and the long-term storage stability of the vaccine antigen are significantly improved, the stability of the antigen in a solution and in an adjuvant environment is significantly improved and the antigen activity is not affected.

The invention discloses an economical and efficient perfluoronitrile and perfluoroketone co-production process and a device. The economicaland efficient perfluoronitrile and perfluoroketone co-production process comprises the following steps: reacting oxygen with an asymmetric perfluoroolefin to generate two acyl fluoride gases or generate a perfluoroketone gas and an acyl fluoride gas; when the two kinds of acyl fluoride gas are generated, and the boiling point of the first acyl fluoride gas is higher than that of the second acyl fluoride gas, subjectingthe first acyl fluoride gas and ammoniagascontact reaction for conversion into a perfluoroamide, and dehydrating and convertingthe perfluoroamide is into a perfluoronitrile; mixing and reacting the second acyl fluoride gas with hexafluoropropylene to generate a perfluoroketone compound; when perfluoroketone gas and an acyl fluoride gas are generated, separating the perfluoroketone gas and the acyl fluoride gas, condensing and collecting the perfluoroketone gas, and subjecting the acyl fluoride gas and ammonia gastocontact reaction for conversion into perfluoroamide, anddehydrating and converting the perfluoroamideinto the perfluoronitrile. According to the method, the perfluoronitrileand the perfluoroketone can be prepared at the same time, the preparation conditions are simple, and the atom economy of the reaction route is high.

The invention discloses a high-aging-resistance modified asphalt and a preparation method thereof. The high-aging-resistance modified asphalt comprises the following components in percentage by mass: 72-80% of substrate asphalt, 1.3-2.7% of hindered amine light stabilizer, 0.5-1.2% of trilauryl phosphite, 0.5-2% of barium stearate, 6-8% of diatomite, 5-10% of epoxy soybean oil and 5-8% of methyl isobutyl ketone. The preparation method comprises the following steps: adding the hindered amine light stabilizer, trilauryl phosphite and barium stearate into the substrate asphalt at appropriate temperature, uniformly mixing with the asphalt, and adding the diatomite, epoxy soybean oil and methyl isobutyl ketone to obtain the high-aging-resistance modified asphalt. The asphalt has very high heat stability and light stability, is capable of greatly enhancing the pavement performance and durability and prolonging the maintenance period and service life of the high-grade asphalt pavement when being applied to the asphalt pavement, and thus, has very high cost performance and wide application prospects.

The present invention relates to a protein, crystal preparation process and its product. In particular, it relates to a phycoerythrin which is extracted from algae under the general condition and can emit strong fluorescence, and can convert it into crystal form, It can be extensively used in the fields of scientific research, medicine detection and telecommunication, etc.

The invention discloses a dehydrogenation catalyst, which uses silica as a carrier, Pt as a dehydrogenation active component, Sn as a first aid, one or more metal of Cu, Fe, Co and Ni other as a second aid; and the catalyst comprises 0.1%-2% of the dehydrogenation active component, and calculated by the weight of the carrier 0.1-10 wt% of the first aid and 0.1-10 wt% of the second aid. A preparation method of the dehydrogenation catalyst is as below: loading the first aid Sn and the second aid, which is one or more selected from Cu, Fe, Co and Ni, and the active component Pt, by using silica gel as the carrier through an immersion method. This method can substantially increase the activity and stability of the catalyst and selectivity of alkene.

The invention discloses a catalyst as well as a preparation method and an application thereof and aims to solve the problems that high reaction temperature and lower target product selectivity during bromination synthesis of 1,1-dibromo-1,2,2,2-tetrafluoroethane from 1,1,1,2-tetrafluoroethane. The catalyst takes one or more of Fe, Al, Cu, Sn, Zn and P halides as active components, is loaded on activated carbon, porous metal fluoride or oxyfluoride with an impregnation method, is used for gaseous-phase synthesis of 1,1-dibromo-1,2,2,2-tetrafluoroethane after being dried and has the advantages of low reaction temperature, high target product selectivity and the like.

Methods for reducing rejection of pancreatic islet cells transplanted into a subject are disclosed. The methods involve transplanting pancreatic islet cells into a subject in the presence of a complement inhibitor, alone or combined with dextran sulfate.

The present invention relates to a protein, crystal preparation process and its product, in particular, it relates to an allophycocyanin which is extracted from algae under the general condition and can emit strong fluorescence, and can convert it into crystal form. It can be extensively used in the fields of scientific research, medicine, detection and telecommunication, etc.

The invention discloses a petroleum drilling auxiliary, the petroleum drilling auxiliary comprises the following components by mass: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxyl-6-acetamido-2-naphthalene sulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of a surfactant, and 400-500 parts of water. The invention further provides a preparation method of the petroleum drilling auxiliary. The modified humic acid and the 4-hydroxyl-6-acetamido-2-naphthalene sulfonic acid in the formula are matched inuse and produce a synergistic interaction, the effects of high temperature resistance and salt resistance of a filtrate reducer are improved, and the particularly excellent high temperature resistanceof the modified potassium hexatitanate whisker reduces the use level of the filtrate reducer in a drilling fluid. The petroleum drilling auxiliary has the functions of resisting the high temperatureof 260 DEG C and resisting saturated salt water, further effectively reduces the filter loss of the drilling fluid, and has a broad application prospect.

Novel silicone rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl relates to silicone rubber; the invention relates to novel silicone rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl, made from, by weight, 100 parts of 107 silicone rubber of specific viscosity, 10 parts of a reinforcing agent, 10 parts of a heat resistant additive, 10 parts of a cross-linking agent, 5 parts of a catalyst, and 10 parts of an aid. The novel silicone rubber can be kept elastic in a wide temperature range, has good adhesion with various base materials, and has good tolerance to high temperature; by adding the rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl to the silicone rubber, heat resistance of the silicone rubber is improved and the applicable range of the silicone rubber is widened.

The present invention relates to a protein, crystal preparation process and its product, in particular, it relates to a fluorophycocyanin which is extracted from algae under the general condition and can emit strong fluorescence, and can convert it into crystal form. It can be extensively used in the fields of scientific research, medicine, detection and telecommunication, etc.

The invention provides an environment-friendly composite fuel oil additive and a preparation method thereof. The environment-friendly composite fuel oil additive comprises 120# solvent oil, calcium sulfonate, isooctyl nitrate, barium naphthanate, ferrocene/manganese complex and sodium diisooctyl sulfosuccinate. The additive solves the problems of high pollutant content and harm to the human body after combustion of heavy oil; and the heavy fuel oil catalytic combustion additive added into the heavy oil can greatly lower the concentration of carbon black in fume, thereby alleviating the environmental problem caused by combustion of heavy oil.

The invention discloses a PVC plastic pipe fitting prepared from the following raw materials in parts by weight: 30-50 parts of ASA resin, 9-15 parts of a thermoplastic polyurethane elastomer, 7-14 parts of butyl acrylate, 7-14 parts of magnesium hydroxide, 22-42 parts of polyvinyl chloride resin, 11-16 parts of nitrile rubber powder, 10-16 parts of crosslinked starch, 8-16 parts of attapulgite, 9-14 parts of silicon carbide whisker and 6-9 parts of a lubricant. The PVC plastic pipe fitting provided by the invention has the advantages of high toughness, high rate of elongation, good anti-aging effect, high strength, low cost and good corrosion and high-temperature resisting effects.