90 results about "Ethylene synthesis" patented technology

This invention relates generally to olefin metathesis, and more particularly relates to the synthesis of terminal alkenes from internal alkenes using a cross-metathesis reaction catalyzed by a selected olefin metathesis catalyst. In one embodiment of the invention, for example, a method is provided for synthesizing a terminal olefin, the method comprising contacting an olefinic substrate comprised of at least one internal olefin with ethylene, in the presence of a metathesis catalyst, wherein the catalyst is present in an amount that is less than about 1000 ppm relative to the olefinic substrate, and wherein the metathesis catalyst has the structure of formula (II) wherein the various substituents are as defined herein. The invention has utility, for example, in the fields of catalysis, organic synthesis, and industrial chemistry.

The invention relates to a preparation method of a catalyst for synthesizing vinyl acetate by virtue of an acetylene gas phase method, the catalyst and a synthetic method of vinyl acetate. According to the preparation method of the catalyst, the catalyst and the synthetic method of vinyl acetate, the problem of low catalyst activity in the prior art is mainly solved. The catalyst comprises a carrier, 50g / L-200g / L zinc acetate and 0-10g / L of potassium acetate. The preparation method comprises the following steps: (a) radiating the activated carbon by virtue of 60 Co-gamma ray to obtain the carrier; (b) loading required amounts of zinc acetate and potassium acetate by virtue of a dipping method; and (c) drying to obtain the catalyst. According to the technical scheme, the problem is well solved. The catalyst can be applied to the industrial production for synthesizing the vinyl acetate by virtue of the acetylene method.

The invention relates to a high-oxygen fresh-keeping method of fresh-cut apples. The method comprises the following steps: (1) treating unbroken apples at a low temperature and under a continuous high-oxygen concentration condition; (2) taking out the apples and cutting the apples so as to obtain apple blocks; and (3) performing color-protecting and coating treatment on the apple blocks by a color-protecting agent and a coating agent, then performing air-filling packaging and sterilization on the apple blocks, and finally, refrigerating. According to the method, the unbroken apples are subjected to the continuous high-oxygen treatment at a low temperature and then are cut, and the growth of bacteria and fungi can be inhibited under the high-oxygen condition, so that the decomposition of fruits and vegetables during the storage is alleviated, the respiratory action and the ethylene synthesis of fruits and vegetables are relieved, the tissue browning of fruits and vegetables is slowed down, and substances with peculiar smells, such as acetaldehyde and ethanol, are decreased. Thus, the storage quality of fruits and vegetables is effectively improved. The effects of the method provided by the invention are obviously superior to the treatment effects of a method in which the refrigeration and the cutting of apples are separately performed.

The invention provides a method for treating the process effluent of ethylene synthesis via ethanol dehydration. The method at least comprises the following four steps: the first step, the process effluent is subjected to the degreasing treatment so that the content of hydrocarbon compounds in the process effluent is reduced below 100mg / L; the second step, after the degreasing treatment, the effluent is divided into two flows by evaporation, wherein one flow is rich in organic substances and the other flow is poor in organic substances; the third step, the flow rich in organic substances is subjected to the membrane separation, the organic substances in the concentrate is recovered, and the water phase is reutilizes; and the fourth step, the flow poor in organic substances is subjected to the biochemical treatment so that the water quality meets the requirements for reclaimed water. The method can recycle the whole effluent after treatment and reclaim the organic substances in the effluent, and achieves the effect of resource utilization of the process effluent and the organic substances in the process effluent.

The invention discloses the synthesis of pterostilbene. The method comprises the following steps: using p-hydroxyphenyl acetic acid and veratraldehyde as raw material, carryingout Perkin reaction, getting (Z)-2(4-acetoxylation phenyl)-3-(3, 5- dimethoxy benzoic) acroleic acid, deacetylation, decarboxylation, and getting pterostilbene. The invention has the advantages of cheap raw material, simple technology, easy operation and high productivity. The invention has the advantages of low cost, good economy benefit and environment protection.

The invention provides a method for treating the process effluent of ethylene synthesis via ethanol dehydration. The method at least comprises the following four steps: the first step, the process effluent is subjected to the degreasing treatment so that the content of hydrocarbon compounds in the process effluent is reduced below 100mg / L; the second step, after the degreasing treatment, the effluent is divided into two flows by evaporation, wherein one flow is rich in organic substances and the other flow is poor in organic substances; the third step, the flow rich in organic substances is subjected to the membrane separation, the organic substances in the concentrate is recovered, and the water phase is reutilizes; and the fourth step, the flow poor in organic substances is subjected to the biochemical treatment so that the water quality meets the requirements for reclaimed water. The method can recycle the whole effluent after treatment and reclaim the organic substances in the effluent, and achieves the effect of resource utilization of the process effluent and the organic substances in the process effluent.

The invention discloses an alkylated catalyst containing modified ZSM-11 zeolite and an application of the alkylated catalyst. The alkylated catalyst comprises the following components in percentage by weight: 30-85 percent of ZSM-11 zeolite, 10-60 percent of binding agent, 0.1-10 percent of alkali metal oxide, 1-20 percent of ZSM-11 zeolite modified additive SiO2 and 0.5-30 percent of ZSM-11 zeolite modified additive alkali metal oxide. The catalyst composition disclosed by the invention is used in a methylbenzene alkylation process for synthesizing p-methyl methylbenzene from methylbenzene and ethylene and is favorable in catalytic reaction effect.

The present invention belongs to the field of chemical synthesis technology, and is synthesis and product of 1-methyl cyclopropenyl sodium as the precursor of novel preservative 1-methyl cyclopropene and used in developing efficient and low-toxic fruit and vegetable preservative. The present invention synthesizes 1-methyl cyclopropenyl sodium with amino sodium. During use, 1-methyl cyclopropenyl sodium reacts with water produced in the breathe of fruits to produce 1-methyl cyclopropene capable of inhibiting the synthesis of ethylene of fruits. The synthesis process of the present invention is simple and suitable for industrial production, and has low cost and no environmental pollution.

This invention relates to the use of an ethylene synthesis or perception inhibitor for treating stressed or unstressed banana plant or plant parts in the field prior to harvest. Because the pre-mature ripening is triggered by ethylene produced by the plant, such inhibitor can be sprayed or gassed on the fruit while it is in the plantation (on the tree) to protect and avoid the pre-mature ripening of fruit left on for the full growth period of 12-14 weeks (instead of 11 weeks or less). The invention, therefore, enables the banana growers to leave the fruit on the tree for the full growth period (even under certain stress), thereby gaining a yield benefit without the problem of pre-mature ripening in transit.

The invention discloses a mutation and screening method for salt-tolerant buckwheat mutants. The method comprises the following steps: treating and mutating buckwheat seeds by adopting EMS (Ethyl Methyl Sulfone), screening buckwheat mutants insensitive to ethylene by virtue of a direct precursor ACC (1-aminocyclopropane-1-carboxylic acid) obtained through ethylene synthesis, cultivating the buckwheat mutants into saline-alkali soil with the salinity of 0.4 to 0.6 percent, screening salt-tolerant plants, planting harvested buckwheat seeds into the saline-alkali soil with the salinity of 0.4 to 0.6 percent, and further screening the salt-tolerant buckwheat mutants with stable characters. According to the mutation and screening method for the salt-tolerant buckwheat mutants, the mutants are easily obtained by mutation with the EMS, DNAs are less damaged by point mutation, and meanwhile, screening with the direct precursor ACC in combination with ETH is combined to screen the salt-tolerant buckwheat mutants, so that the mutation frequency is high, the target is clear, the screening efficiency is high, and can reach 10 to 20 percent, the operation cost is low, and the obtained mutants have stable characters.

The invention relates to the fields of gene engineering and biosynthesis, and concretely relates to a construction body for efficiently synthesizing ethylene, and a construction method and an application thereof. The construction body comprises an active promoter and an ethylene synthetase gene (efe) controlled by the promoter. Carbon dioxide can be immobilized by above engineering bacterium through using solar energy in order to synthesize ethylene. An ethylene synthesis approach is constructed in cyanobacterial cells in order to realize immobilization of carbon dioxide in photosynthetic microbal cyanobacterial cells through using solar energy and synthesis of ethylene, wherein energy for ethylene synthesis is from the solar energy, and a carbon source is carbon dioxide. The method can be used to prepare bioethylene without restriction of petroleum shortage, and the bioethylene does not increase carbon emission.

The invention belongs to the technical field of storage and fresh keeping of agriculture products, particularly relates to a climacteric type fresh keeping method for fruits and vegetables, in particular to a novel method for fresh keeping of fruits and vegetables, through combination of an ethylene synthesis inhibitor namely aldinamide with compounding cooling water. The method comprises the following steps of 5 days before the fruits and the vegetables are picked, spraying the aldinamide with a certain concentration, after the fruits and the fruits are picked, performing maceration with thecompounding cooling water, then performing airing in a ventilated freezer, performing loading into spontaneous modified atmosphere package, putting an ethylene adsorbent with a certain concentration,then immediately performing binding bags, performing low-temperature storage, and maintaining the humidity in a fresh keeping warehouse to be greater than or equal to 85%. The aldinamide is combined with the compounding cooling water, so that ethylene synthesis in the fruits and the vegetables can be restrained, the effect of killing bacteria can be achieved, softening of the fruits and the vegetables can be delayed, the efficiency can be improved, and the fresh keeping effect can be achieved and increased. The fresh keeping technique used in the method is significant in effects, ethylene synthesis of the fruits and the vegetables can be effectively restrained, the obvious effect of killing bacteria can be achieved, besides, the temperature can be lowered quickly, the operation is convenient, the efficiency can be improved, and the method is high in practicality and convenient to popularize and apply.

The invention discloses a small molecular inhibitor pyrazinamide (shortened as PZA) used in plant ethylene synthesis. The small molecular inhibitor pyrazinamide is characterized by being a specific inhibitor of ACC oxidase (ACO), and being capable of inhibiting conversion of an ethylene synthesis precursor ACC into ethylene in the plant ethylene synthesis; and the pyrazinamide has a structural formula shown as a figure in the abstract, and has the molecular weight of 123.12. The invention further provides a culture medium which contains the pyrazinamide and can inhibit the plant ethylene synthesis. The invention further provides application of the small molecular inhibitor pyrazinamide used in the plant ethylene synthesis to plant growth and development regulation and refreshment during plant transportation. The inhibitor pyrazinamide can obviously inhibit the plant ethylene synthesis, has a stronger effect than known ethylene synthesis inhibitors, and is convenient in popularization and application.

The invention provides a dimethyl sulphur-based ethylene synthesis method. In the method, potassium hydroxide which has grain size at the range of 100 to 300 nm is replaced by nano potash to serve as a raw material to react. The method comprises the following steps: adding the raw materials of carbon disulfide, nitromethane or malononitrile, the nano potash and solvent into a reactor to react; filtering after complete reaction to obtain brick red solid, carrying out atmospheric distillation on filtrate and recovering the solvent; dissolving the brick red solid in water, slowly adding dimethyl sulfate while stirring; filtering after complete reaction; and recrystallizing the solid with ethanol to obtain buff solid 1,1-dimethyl sulfur-2-nitroethyleneor or 1,1-dimethyl sulfur-2,2-dicyano ethenyl. In the method, strong base potassium hydroxide is not used, and the method has moderate reaction condition and hardly any side reaction, and is simple and convenient in operation.

The invention relates to a catalyst for ethylene synthesis, especially relates to a method for preparing a catalyst of transition metal ethylene synthesis after load; iron system of aluminosilicate, which includes the following steps: a, with agtatering by machine, the aluminosilicate and alcohol solution of long-chain amine salt will react in water in the temperature of 20-90deg.C for 0.5-8hours, wash, dry and scatter it to make modified carrier; b, with agtatering by machine, the modified carrier generated will react with methyl aluxanes in long-chain alkane with the temperature of 0-120deg.C for 0.5-8hours through washing, the activated carrier is made; c, with agtatering by machine, the long-chain alkane solution of complex compound of transition metal after ironis dropped into the activated carrier generated in the temperature of 10-100deg.c, after 0.5-12hours, wash it for several times, the catalyst is made. The invention has high efficiency of loading, simple technique, low cost and the catalyst being made has high activity.

The invention relates to a catalyst composition containing modified ZSM-11 zeolite and an application of the catalyst composition. The catalyst composition comprises the following components of: 30-85 percent of ZSM-11 zeolite, 10-60 percent of binding agent, 0.1-10 percent of alkali metal oxide, 1-20 percent of ZSM-11 zeolite modified additive SiO2 and 1-20 percent of ZSM-11 zeolite modified additive alkali metal oxide. The catalyst composition disclosed by the invention is used in a methylbenzene alkylation process for synthesizing p-methyl methylbenzene from methylbenzene and ethylene and is favorable in catalytic reaction effect.

The invention discloses a peach transcription factor PpERF.A16 and application thereof. The gene belongs to an ERF family member, and has a nucleotide sequence as shown in SEQ ID NO.1; the length of acoding sequence is 966bp, and 321 amino acids are coded; an amino acid sequence coded by the amino acids is as shown in SEQ ID NO.2. On the basis of genome and RNA SEQ analysis, an ethylene biosynthetic gene, 1-aminocyclopropane-1-carboxyl synthase and an AP2 / ERF transcription factor are separated and analyzed. Biological functional verification shows that the PpERF.A16 gene has a function of promoting ethylene synthesis. The finding of the PpERF.A16 gene provides new gene resources for promoting molecular breeding of the ethylene synthesis and provides new genetic resources for implementinggreen agriculture; development and utilization of the resources are favorable for improving the commercial value and the market competitiveness of peach fruits, prolonging the shelf life of fruits, reducing the agricultural cost and realizing environmental friendliness.

The invention discloses an application of polyamine decomposition inhibitor aminoguanidine in fruit preservation, and a usage of the polyamine decomposition inhibitor aminoguanidine in fruit preservation. The fruits are honey peaches, apples, grapes, pomegranates, apricots or strawberries. A usage method of the polyamine decomposition inhibitor aminoguanidine in fruit preservation specifically comprises the following steps: (1) blending an aqueous aminoguanidine hydrochloride solution of which the concentration is 1-10mM by utilizing aminoguanidine hydrochlorides and water; (2) when color of the fruits starts to change, sprinkling the aqueous aminoguanidine hydrochloride solution obtained in the step (1) onto the fruits, wherein the sprinkling of the aqueous aminoguanidine hydrochloride solution obtained in the step (1) is performed once every 4-7 days for totally 3-5 times. The polyamine decomposition inhibitor aminoguanidine is capable of delaying ripening and softening of the fruitsby inhibiting ethylene synthesis by utilizing polyamines in the fruits by inhibiting polyamine decomposition and metabolism during ripening processes of the fruits, and thus, storage and preservationlives of the fruits are prolonged; moreover, the polyamine decomposition inhibitor aminoguanidine is relatively good in effects, and low in use cost.

Provided are systems and methods for plant stress mitigation. The systems provided comprises three key components to perform a self-standardized algorithm for identifying / measuring significant stress conditions within a short time window (for example 1 to 3 days). After identification of a significant stress condition, plants under stress can be treated with a composition comprising an ethylene synthesis or perception inhibitor, for example 1-methylcyclopropene (1-MCP). Also provided are methods for identifying plant genes in response to stress using the system disclosed herein.

The invention belongs to the technical field of biology, and particularly relates to a novel method for prolonging a shelf life of a tomato fruit by utilizing a genetic engineering technology. The shelf life is mainly related to ethylene synthesis, ethylene signal conduction, cell wall degradation and the like, and the existing technology has some researches on related target control genes, but maturing and softening of the fruit are not effectively delayed after the genes are modified or nutrient ingredients, active ingredients and the like of the fruit are also affected although maturing andsoftening of the fruit can be delayed, and therefore, the existing technology is not suitable for production application. The SlEB1 gene of the tomato is tightly related to synthesis of ethylene andcell wall degradation, and the shelf life of the tomato generated by transgenosis is extremely prolonged after the gene is silent, and therefore, the novel method can be practically applied to production and life.

The invention discloses a method for vinyl chloride synthesis waste treatment and control. High-temperature flue gas generated by waste incineration enters a quench tower and contacts with circulating acid fluid to be cooled; the cooled flue gas enters a condenser to be cooled again; the flue gas cooled once again enters a falling film absorber to be absorbed, and absorbed tail gas enters an alkaline tower to be treated. A waste treatment device can stably generate high-concentration and pure hydrochloric acid, the quality of the byproduct hydrochloric acid is ensured, the device can run by adopting different control methods according to different working conditions, the running cost can be reduced, and flue gas generated by incineration can also meet environmental protection requirements.

The present invention generally relates to liquid compositions comprising an ethylene synthesis inhibitor for the treatment of crops suitable for thermal fogging applications. A preferred ethylene synthesis inhibitor is aminoethoxyvinylglycine hydrochloride (AVG HCl).

The invention discloses a pine wood nematode effector BxSCD1 interaction protein as well as a coding gene and application thereof, and belongs to the technical field of molecular biology. The pine wood nematode effector BxSCD1 interaction protein has an amino acid sequence as shown in SEQ ID No. 1, and a nucleotide sequence for expressing the protein is as shown in SEQ ID No. 2. Starting from an effector secreted by the pine wood nematode and a host target, the interaction between a host pine tree and the pine wood nematode is studied, it is found that BxSCD1 silencing can delay the disease attack of the black pine, and BxSCD1 inhibits expression of genes related to the disease course of the black pine; through interaction of the BxSCD1 and the pine tree ethylene synthase gene ACO1, it is proved that the BxSCD1 can influence the immune response of the pine tree by influencing the expression quantity of the ethylene synthase ACO1 of the black pine, and the BxSCD1 has important scientific significance in the aspects of revealing the pathogenesis of the pine wood nematode, early detection of the occurrence of the pine wood nematode disease and the like.

The invention provides a moistening moisturizing lipstick. The moistening moisturizing lipstick is prepared from water, glycerine, polyethylene, paraflint, sunflower seed wax, hydrogenated polyisobutylene, pigment, pearl powder, silica, ethylhexylglycerin, caprylyl glycol, polydimethylsiloxane and PEG-10 polydimethylsiloxane. The moistening moisturizing lipstick disclosed by the invention reservesbasic characteristics of nourishing and coloring of a lipstick, besides, through an emulsifying technique, about 10% of water phase moisturizing components are prepared into a stable water-in-oil emulsifying system, water phase components are stabilized in the system but are not demulsified to separate, besides, due hardness of the lipstick can be reserved, and the lipstick can be shaped. When the moistening moisturizing lipstick is used for making-up, unique moisturizing moistening sense and cool and refreshing sense can be caused.

Synthesis and application methods for a non-noble metal catalyst used for selective hydrogenation of high concentration acetylene to produce ethylene. An active component of the non-noble metal catalyst is a combination of Ni, Zn and K, wherein alpha-Al2O3 serves as a carrier. The proportion of nickel acetylacetonate, zinc acetylacetonate, potassium acetate to the alpha-Al2O3 is 8.7-30:20-40:2.5-7.5:100 by gram. In synthesis of the catalyst, dimethylformamide (DMF) is used as a solvent and graphene is used as an enhancer. The catalyst is synthesized under a non-aqueous condition and is prepared by drying the components and then calcining the components at 400-500 DEG C. The catalyst, after being reduced with hydrogen gas, is applied to a reaction system of selective catalysis of high concentration acetylene to produce ethylene, wherein the acetylene is sourced from a calcium carbide method. In addition, the ethylene is synthesized in a slurry bed reactor at high space velocity, DFM being the solvent. In the invention, the catalyst has high acetylene conversion rate and high ethylene selectivity, and is long in service life.

The present invention generally relates to methods of thermal fogging ethylene synthesis inhibitor compositions for post-harvest treatment of crops. A preferred ethylene synthesis inhibitor is aminoethyoxyvinylglycine hydrochloride (AVG HCl). In a preferred embodiment, a method comprises producing a thermal fogging mist from said composition, wherein said thermal fogging mist contains particles of the ethylene synthesis inhibitor and applying an effective amount of said thermal fogging mist to said crops.

The invention relates to a vinyl chloride synthesis reaction process, in particular to an acetylene method vinyl chloride synthesis reaction process which comprises the following steps: (1) carrying out adiabatic catalytic reaction on mixed raw material gas A to obtain mixed gas B; and (2) carrying out isothermal catalytic reaction on the mixed gas B to obtain mixed gas C containing vinyl chloride, and enabling the mixed gas C to enter a post-treatment system. Radial and two-stage catalytic reactions are adopted, an independent raw material gas preheater is omitted, the number of devices is reduced, the device investment is saved, the reaction pressure drop is reduced, the service life of the catalyst is prolonged, meanwhile, the subsequent reaction efficiency is improved, the conversion rate is larger than 98.5%, and the selectivity is larger than 99%.

The invention discloses a mercury-free catalyst for synthesizing vinyl chloride through renewable reaction and a preparation method of the mercury-free catalyst. The preparation method comprises the steps that: copper salt is added into a hydrochloric acid solution, and after uniform stirring, an impregnation liquid a is obtained; a ligand solution is added into the obtained impregnation liquid a, impregnation is conducted for 10-48 h, the impregnation temperature is kept at the constant water bath temperature of 50-80 DEG C, the materials are evenly stirred and mixed, and an impregnation liquid b is obtained; a carrier is impregnated with the obtained impregnation liquid b, filtering is carried out after impregnation is completed, the carrier is cleaned with deionized water until the carrier is neutral, and then the carrier are dried and roasted to finally obtain the catalyst; and after the prepared catalyst is inactivated, the catalyst is kept at the oxygen volume space velocity of 400-1500, and high-temperature reduction regeneration is carried out in an oxygen-containing oxidation atmosphere. The catalyst prepared by the preparation method is environment-friendly and simple in process flow, the production cost of the mercury-free catalyst is effectively reduced, the manufacturing fund is saved, the inactivation and regeneration of the catalyst can be realized, and the catalyst is convenient to put into use.

The invention belongs to the technical field of plant genetic engineering, and specifically relates to a gene OsVAS1 capable of regulating the ideal plant type of rice. According to the present invention, the gene OsVAS1 simultaneously participating in rice auxin and ethylene synthesis pathways is cloned by using a candidate gene screening method, the plant type of rice can be improved and the yield can be increased through the site-directed mutation of the OsVAS1 gene by using a CRISPR technology, and biological function verification results prove the functions and the application ways of thegene; the nucleotide sequence of the gene OsVAS1 is represented by SEQ ID NO:1; the sequence of the protein encoded by the first transcript of the gene is represented by SEQ ID NO:3; and the sequenceof the protein encoded by the second transcript of the gene is represented by SEQ ID NO:5.