199 results about "Organic chloride compound" patented technology

A process is provided for the start-up of an ethylene epoxidation process comprising: (a) contacting a catalyst bed comprising a high selectivity epoxidation catalyst with a feed comprising ethylene, oxygen and an organic chloride for a period of time until an increase of at least 1×10⁻⁵ mole-% of vinyl chloride (calculated as the moles of vinyl chloride relative to the total gas mixture), preferably 2×10⁻⁵ mole-% of vinyl chloride is detected in a reactor outlet gas or a recycle gas loop; and (b) subsequently adjusting the quantity of organic chloride in the feed to a value sufficient to produce ethylene oxide at a substantially optimum selectivity.

The invention discloses a dechlorination agent and a preparation method thereof. The dechlorination agent is prepared from the following materials: 15-70wt% of carrier, 15-60wt% of active components, 1-10wt% of a pore-forming agent, 1-5wt% of an extrusion aid and 2-10wt% of a binder, wherein the carrier is at least one of weak acid salt, kaolin, pseudo-boehmite or Al2O3. The preparation method comprises the steps of mixing the materials, adding water, mixing, kneading, extruding, drying and calcining. The dechlorination agent has the advantages of high adsorption efficiency against high-concentration or low-concentration HCl at normal temperature, high dechlorination precision, high chlorine content of above 30% and a certain adsorption effect against organic chlorides; chemical reaction adsorption is adopted for adsorption against HCl, the adsorption is performed at normal temperature and normal pressure, energy consumption is not required, and the absorbed HCl and the active component in the dechlorination agent perform reaction to form a stable chemical substance to exist in an adsorber bed layer; and the dechlorination agent further has the advantages of low toxicity, high stability, easiness in filling and unloading, and no secondary pollution.

The invention relates to a method for removing organochlorine from hydrocarbon oil. A demulsifier, an alkaline compound, a phase transfer agent, injected water and the hydrocarbon oil are mixed, oil-water separation is performed under the action of a thermal field and/or an electric field, organic chloride is transformed into inorganic chloride and the inorganic chloride is removed with a water phase, so that the aim of dechlorination is fulfilled. The method is suitable for organochlorine-containing conventional crude oil, heavy crude oil and distillate oil.

The present invention relates to a method for producing a Ti/V supported catalyst useful in polymerization of ethylene and copolymerization of ethylene and alpha-olefin. The method includes a treatment, by a titanium compound and a vanadium compound, of the magnesium-containing carrier, which is obtained by reaction of an organomagnesium compound of the structure of MgPh2.nMgCl2.mR2O (n=0.37~0.7; m>=1; R2O=ether; Ph=phenyl) with an organic chloride compound in a mole ratio of organic chloride compound/Mg>=0.5, at -20~80° C. According to the method for producing the catalyst, it is possible to provide a catalyst which can control the distribution of molecular weight, and when polymerization is performed using this catalyst, it is possible to restrain the inactivation and to secure a sufficient activity. Moreover, the polymer produced by the use of this catalyst proves to have a high bulk density and an adjusted particle size distribution.

The invention discloses a system and a method for purifying tail gas of medical waste incineration. The method is characterized in that a spray gun is used for quickly cooling tail gas at 400-600 DEG C to below 200 DEG C in a tail gas quenching tower; the cooled tail gas enters into a semi-dry type reactor; lime and activated carbon are added in front of the semi-dry type reactor, so as to de-acidify the tail gas and absorb dioxin and heavy metal; dust is removed from the de-acidified tail gas by a bag-type dust collector; the de-dusted tail gas is subjected to spraying alkali wash through a spraying layer in a spraying absorbing tower; liquid drop carried by the tail gas after being subjected to the spraying alkali wash is removed by a demister in the spraying absorbing tower; and then the tail gas is heated after entering into a steam-tail gas heat exchanger, and lastly the tail gas is discharged from a chimney by a draught fan. By using the system and method provided by the invention, the purifying efficiency for the tail gas of medical waste incineration can be obviously increased. Especially, when a large amount of organic chloride is burnt, such as waste plastics (for example, PVC (polyvinyl chloride), PVDc (polyvinyl dichloride)), rubbers, leathers, and the like, concentration of HCL (hydrogen chloride) generated by being burnt is higher, the wet alkali wash is automatically performed, and the deacidification demand is still met, thereby reducing environmental pollution, generating no waste water and solving the problem of generating waste water by performing wet treatment.

The invention discloses modified polyolefin paper without plant fiber. The modified polyolefin paper is formed by a matrix layer 1 without the plant fiber, a matrix layer 2 without the plant fiber and a matrix layer 3 without the plant fiber which are compounded into a whole, wherein the matrix layer 1 and the matrix layer 3 are prepared by 20 to 30 percent of ethylene-acrylic acid modified copolymer EAA, 45 to 60 percent of metallocene high-density polyethylene mHDPE, and 20 to 25 percent of activated ultrafine inorganic powder respectively, and the matrix layer 2 is prepared by 60 to 90 percent of activated ultrafine inorganic powder, 2 to 5 percent of maleic anhydride and 8 to 35 percent of high-density polyethylene. The modified polyolefin paper has the advantages of good ink receptivity and softness. Therefore, the modified polyolefin paper can be used as industrial paper, packing paper and household paper, can also be used as cultural paper, and enlarges the use range. The modified polyolefin paper has higher foldability and rigidity, has the longitudinal and transverse tearing strength which are superior to those of plant fiber paper, has good surface flattening, good handwriting, and clear printing performance, saves printing ink, has simple production technology, protects forest resources, saves energy sources and water, reduces the discharge of organic chlorides and harmful gas, has no waste, and protects the environment.

The present invention relates to adsorbent, and belongs to the field of technology of treating water and air with active carbon. The present invention prepares active carbon with giant reed root and stem and through crushing, stoving, carbonizing, forming pore and activating. The prepared active carbon may be applied widely in eliminating aromatic compound and organic chloride from waste water, eliminating heavy metal ions, treating atmosphere pollution, etc. The giant reed has low carbonizing temperature and low power consumption.

The invention discloses a method for purifying and removing chlorides contained in a chlorine-containing industrial mixed gas and recovering light hydrocarbon, and the method comprises a pressure-swing adsorption and/or temperature swing adsorption method. An adsorptive separation system which comprises two or more than two adsorption towers filled with adsorbents and a series of program control valves absorbs and fine removes the chlorine-containing industrial mixed gas; a tail gas is respectively subjected to the following steps of: adsorption, reverse release, normal-temperature evacuation or heating flushing and filling increase in the adsorption towers under the action of the program control valves; the adsorption towers is operated according to a sequence circulating and time sequence alternating mode; the outlets positioned on the upper ends of the adsorption towers control the total content of the chlorides to be less than 5 ppm, so that a purified gas or other target product gases are obtained after the chlorides are purified and removed. The method disclosed by the invention can be used for fine purifying and removing various organic chlorides, chlorine hydride and chlorine which are contained in a dichloroethane synthetic tail gas synthesized by directly chloridizing a refining and chemical dry gas and dilute ethylene or other chlorine-containing industrial mixed gases and recovering the light hydrocarbon or the other target product gases.

The invention discloses a bleaching process with low pollution used for straw pulp by virtue of elemental chlorine-free bleaching agents such as oxygen, chlorine dioxide, hydrogen peroxide and the like. The invention is characterized in that the process comprises the steps as follows: (1) on oxygen delignification section, sealing, sifting and washing are carried out; (2) on chlorine dioxide delignification section, washing is carried out; (3) on alkaline extraction section, washing is carried out; (4) on chlorine dioxide whitening section, washing and papermaking are carried out. The process of the invention is simple and feasible, applicable for reed pulps and the mixed pulp thereof and anaphalis yedoensis, the final brightness of the pulp of the reed pulps (ISO) reaches 78-85%, the brightness stability and the strength are good, and tear index is more than or equal to 8.0mN.m<2>/g; as no elemental chlorine joins the bleaching process, the generation amount of organic chloride during the bleaching process is greatly lowered and the pollution to ecological environment is reduced, thus having obvious social and economic benefits.

The invention provides a liquid organosilicon lubricating grease composition, which is cast between a heating element and a heat radiation element and then solidified, thereby improving thermometric conductivity and simultaneously maintaining allocation performance of organosilicon lubricating grease composition with heat conductivity. The organosilicon lubricating grease composition with heat conductivity contains the following substances: 25 DEG C, viscosity 50-1000 Pa.s: (A) organopolysiloxane containing more than two alkenyl groups in one molecule; (B) organic hydrogen polysiloxane showed in general formula (1); (C) organic hydrogen polysiloxane showed in general formula (2); (D) bulking agent with heat conductivity, whose thermometric conductivity is more than 10W/m DEG C; (E) catalyst selected from platinum and platinum compound; (F) control agent selected from acetylenic compound, nitrogen compound, organic phosphorus compound, oxime compound and organic chloride compound; (G) volatile solvent for dispersing or dissolving ingredients mentioned above and the boiling point is 80-360 DEG C.

The invention discloses a method for recovering organic chloride from rectification residues of methane chloride or/and tetrachloroethylene. The method specifically comprises the steps of leading the rectification residues of methane chloride and tetrachloroethylene into an evaporator to perform evaporation, condensing volatile components into liquid and then feeding the liquid into a trap device and transferring the residues into a sublimator; using a tetrachloroethylene rectification system to separate trichloromethane, carbon tetrachloride and the tetrachloroethylene from a part of light component mixed liquid; meanwhile sublimating the residues in the sublimator under the 240-250 DEG C condition, cooling the residues through a condensation device to obtain an initial hexachloroethane product; leading the light component mixed liquid into a refining pan, adding and dissilving the initial hexachloroethane product and then transferring the product into a crystallizing pan for crystallization; performing filtration after the crystallization, collecting a filter cake and filtrate, drying the filter cake to obtain a hexachloroethane product and leading the filtrate into the evaporator for continuous circulation. The method is simple and adopts simple devices, additional solvents and raw materials are not needed, and the method has good environment-friendly benefit and social benefit.

The invention discloses a high-solid content polyamide polyamine epichlorohydrin wet strength agent, as well as a preparation method and an application thereof. The preparation method comprises the following steps: performing condensation on a dibasic acid and a diamine under the action of an acidic catalyst to get a polyamide polyamine intermediate; enabling the polyamide polyamine intermediate, an organic chloride and a cation active monomer or a mixture of the cation active monomer and sodium hydroxide to perform nucleophilic addition reaction to get a high-viscosity cation polymer; and further adding water-soluble hydroxy amine to react and regulating pH with an acid to get the high-solid content polyamide polyamine epichlorohydrin wet strength agent. The obtained wet strength agent has the advantages of high solid content above 40% (in percentage by weight), high charge density, stability in storage, great wet-strengthening performance and few chlorine-containing byproducts, and can be applied in papermaking wet-end chemistry process.

The invention provides an additive for removing organochlorine from crude oil. The additive is characterized by being prepared through compounding of 2%-10% of a phase-transfer catalyst, 10%-30% of alkali and 60-88% of a solvent by mass. During electrical desalting and dewatering, the additive of the invention is added together with a demulsifier, thus being able to effectively remove an organic chloride from crude oil, reduce the content of chloride ions in condensed water at the top of a distillation tower, alleviate corrosion of tower top distillate pipelines and cooling-heat transfer equipment, as well as having no side effect on subsequent processes.

The invention relates to a catalyst used for removing organic chloride in hydrocarbons. The catalyst is composed of 5-40 percent of active compositions and 95 percent-60 percent of carriers, which are calculated according to total weight of the total catalyst. The catalyst is prepared through the following three steps: 1) the catalyst carriers are dipped into aqueous solution with the active compositions for 2-20 hours; 2) the catalyst dipped in the step 1) is dried for 1-24 hours at 20-150 DEG C; 3) the catalyst dried in the step 2) is roasted for 1-24 hours at 300-600 DEG C, and then the temperature thereof is cooled to room temperature. By adopting the catalyst, the removal rate of the organic chloride in oil products is more than 90 percent.

The invention provides an absorbent removing organic and inorganic chloride from hydrogen flows produced by catalytic reforming of heavy naphtha. The absorbent comprises 1% to 50% weight of activated carbon component, 40% to 90% weight of aluminum oxide component and 5% to 55% weight of metallic oxide component as well as 0.5% to 3% weight of binder. The invention further provides a method of manufacturing and using the absorbent.

The invention, belonging to the field of chemical industry production, discloses a method for removing contained chlorine from a byproduct hydrogen chloride gas generated in the process of producing organic chlorides, comprising the following steps: carrying out reduction reaction upstream on a byproduct hydrogen chloride gas output by the process of producing organic chlorides and a purification solution in a packed tower to remove chlorine, and then conducting freeze drying to obtain a high-purity hydrogen chloride gas with the chlorine content of less than 1ppm. According to the invention, by using a ferrous chloride solution containing satuarated hydrogen chloride as the purification solution to remove chlorine from the hydrogen chloride gas with a chlorine content of less than 5%(v/v) to obtain chlorine, the advantages of simpleness, reliability, fast removing speed, and low energy consumption and cost of purification are achieved, and the method can effectively raise the application value of the byproduct hydrogen chloride gas, broaden the application range of the byproduct hydrogen chloride gas, and the like; and the method can be used for removing chlorine from a synthetic hydrogen chloride gas with a chlorine content of less than 5%(v/v and byproduct hydrogen chloride gases generated from other production processes.

The invention discloses an antichlor and a preparation method thereof. The antichlor uses a composite oxide as a carrier to be loaded with oxides of alkali metal and/or alkaline earth; the composite oxide carrier contains theta aluminum oxide and calcium oxide. The composite oxide carrier is prepared by a coprecipitation method; calcium oxide is introduced into a carrier framework structure; the breakthrough chlorine content can reach 17.6 percent at the normal temperature. Through high-temperature roasting, the prepared aluminum oxide with the theta material phase structure reduces the surface hydroxyl quantity; the physical adsorption of HCl on the antichlor is reduced to the maximum degree; the phenomenon of antichlor surface acidity enhancement due to HCl physical adsorption concentration is reduced, so that the phenomenon of green oil generation through olefin polymerization due to acid catalysis is reduced; the phenomenon of organic chloride generation through reaction of olefin and HCl due to acid catalysis can be avoided. In addition, through the prepared composite oxide carrier, the intensity of the antichlor is obviously improved; the agglomeration or pulverization phenomenon under the water-containing steam work condition can be eliminated.

The invention relates to a hybrid membrane capable of degrading organic chloride and a preparation method of the hybrid memrbane, belonging to the scientific and technical field of polymers. The preparation method comprises the steps of dispersing polyvinylidene fluoride powder, polyacrylic acid microgel or microspheres in N,N-dimethylfomamide, and preparing a flat base membrane by adopting a phase inversion method; then soaking the base membrane in an aqueous solution containing FeCl2 to react for a certain period of time, then soaking the base membrane in an aqueous solution containing sodium borohydride to prepare a hybrid membrane containing Fe<0> nanoparticles, and then soaking the hybrid membrane in an anhydrous ethanol solution containing noble metal salt to prepare a hybrid membrane capable of degrading organic chloride and containing iron-noble metal nanoparticles. The hybrid membrane can degrade chlorinated organic compounds including monochloroacetic acid, chlorophenesic acid, trichloroethylene, tetrachlormethane, polychlorinated biphenyl and the like, and has the advantages of high catalytic reaction activity, convenience in operation, good reuse effect and the like. Besides, the hybrid membrane also has the advantages of simple preparation method, low cost, suitability for large-scale production and the like.