45results about How to "High volumetric space velocity" patented technology

A catalyst for preparing isobutene by cracking methyl turt-butyl ether (MTBE) is prepared from the amorphous SiAl through treating by saturated steam at 100-600 deg.C for 1-10 hr. Its advantages are high conversion rate of MTBE, high selectivity to isobutene, and long service life (at least 3504 hr).

The hydrogenation process for producing catalytically cracked material includes the successive contacting and reaction of the mixture of material oil and hydrogen with hydrogenation protecting agent, residual oil hydrogenating and demetallizing agent and residual oil hydrogenating and desulfurizing agent, cooling the reaction resultants, and separating obtain hydrogen-rich liquid and gas products. The catalyst includes hydrogenation protecting agent in 2-10 vol%, residual oil hydrogenating and demetallizing agent in 5-70 vol%, and residual oil hydrogenating and desulfurizing agent 20-93 vol%. The present invention makes it possible to produce high quality catalytically cracked material via adding residual oil in 5-50 wt% into gas oil.

The invention relates to the production field of high purity benzene, toluene and mixed xylene, in particular to a method for treating a hydrorefining crude benzene. The method takes coking crude benzene as raw material, after pretreatment, heavy aromatics are removed directly through a vacuum and de-heavy tower with the pressure at the top of the tower between 0.01MPa and 0.1MPa; pre-hydrotreating reaction and main-hydrotreating reaction are carried out, gas phase material enters a high pressure flash drum after hydrotreating reaction, hydrogen-rich gases are separated, liquid phase material enters a stabilizer and low boiling point hydrocarbon is removed; liquid phase material removed from the low boiling point hydrocarbon enters an aromatics extraction device and high purity benzene, toluene and mixed xylene are obtained through extraction. Under the premise of guaranteeing the yield of benzene, toluene and mixed xylene, the method not only effectively reduces investment cost and the operation cost of devices, but also has the advantages of good product quality, long device running cycle, etc.

The invention provides a method for producing epoxy chloropropane. The method comprises the following steps of chlorination of glycerin, separation of a dichloropropanol-hydrogen chloride aqueous solution, compression of hydrogen chloride, and purification of dichloropropanol saponification and epoxy chloropropane. A dichloropropanol oil phase is decanted and layered through the separation of the dichloropropanol-hydrogen chloride aqueous solution and directly enters the saponification step; gas-phase hydrogen chloride escaped during the separation of the dichloropropanol-hydrogen chloride aqueous solution is pressurized and introduced into a reactor; and hydrogen chloride is subjected to filtration and washing operations, so that the content of water and impurities in hydrogen chloride raw material is reduced; and selective scope of the hydrogen chloride compressor is broadened. The method is advantaged by guaranteeing that volume space velocity of the reactor is not smaller than 0.1; conversion rate of glycerin is not lower than 98% and selectivity for dichloropropanol is not lower than 99%, by optimizing a catalyst proportion, a reaction pressure and reaction temperature during the chlorination of glycerin.

The process of hydrogenating gas oil and residual oil to produce catalytically cracked material includes the following steps: contacting and reacting the mixture of gas oil and hydrogen with optional hydrogenation protecting agent and hydrogenation refining catalyst in the first reaction area; directly mixing the produced oil with residual oil, contacting and reacting the mixture with hydrogenation protecting agent, hydrogenating and demetallizing catalyst and hydrotreating catalyst successively in the second reaction area; cooling and separating the reacted products to obtain hydrogen-rich liquid and gas products. The present invention makes it possible to produce high quality catalytically cracked material via adding residual oil in 5-50 wt% into gas oil.

The invention discloses a multi-component X/Z2O3/POMs/Al2O3 type catalyst for preparing high-purity isopentene, and a preparation method of the catalyst. According to the method, the catalyst contains the following components in percentage by weight: 20-95% of Al2O3, 0.01-20% of Z2O3, 0.01-50% of POMs and 0.01-25% of X. The catalyst can be used for preparing isopentene by cracking of tertiary amyl methyl ether at temperature (140-160 DEG C) lower than that of other similar catalysts, the selectivity of high-purity isopentene and methyl alcohol is ensured, the cracking of tertiary amyl methyl ether approximates complete transformation, the airspeed of the reacted liquid in use of the catalyst is enhanced by 2-5 times than that in use of other similar industrial catalysts, and inert substances such as water are not required to be added in a tertiary amyl methyl ether cracking reaction system; under the condition that the existing reaction equipment is not changed, the energy consumption in industrial production can be lowered and the utilization rate of equipment can be multiplied.

The invention discloses a method for purifying 1,4-butanediol. The method comprises the following step of enabling crude 1,4-butanediol containing aldehyde compound and/or acetal compound impurities to contact a silver-loaded resin catalyst under the hydrogen contacting condition, so as to obtain the purified 1,4-butanediol with color degree smaller than 10APHA. The method has the advantage that the crude 1,4-butanediol containing the aldehyde compound and/or acetal compound impurities can be purified, so that the color degree of the 1,4-butanediol is reduced.

The invention discloses a multicomponent (X/Z2O3/YO4/Al2O3) catalyst for preparing isoamylene and a preparation method thereof. According to the method, the catalyst comprises the following components by weight percent: 20% to 95% of Al2O3, 0.1% to 20% of Z2O3, 0.1% to 50% of YO4 and 0.1% to 40% of X. The catalyst can take a reaction to prepare the isoamylene by the splitting decomposition of t-amyl-methyl ethe at a temperature lower than that of the existing catalyst of the same type. Under the condition that the high selection on the isobutene and the methanol and the high conversion rate of the splitting decomposition of the t-amyl-methyl ether are guaranteed, as compared with the existing catalyst of the same type, the catalyst provided by the invention has the effects that the space velocity of liquids in the reaction is improved exponentially, and water and other inert substances are not required to be added into a splitting decomposition reaction system of the t-amyl-methyl ether. Therefore, under the condition of unchanging the existing reaction equipment, the energy consumption in the industrial production is lowered, and the equipment utilization rate is improved exponentially.

The invention discloses a hydrocracking method for producing chemical materials. The method comprises the steps of entering raw material oil and hydrogen into a hydrorefining reactor for performing hydrodesulfurization, hydro-denitrification, olefin saturation and partial aromatic saturation under the action of a hydrorefining catalyst; and carrying out contact reaction on the obtained effluent and a hydrocracking catalyst in a hydrocracking reactor. According to the method provided by the invention, the required transformation depth can be reached under a relatively mild reaction condition; heavy naphtha is good in selectivity; and long-term operation of a device is realized.

The invention discloses a processing method of Fischer-Tropsch synthetic oil. Fischer-Tropsch synthetic oil is used as a raw material, and a two-stage hydrogenation process of hydrofining-hydro-upgrading-isodewaxing is adopted to produce API III <+> lubricating oil base oil. Generated oil obtained through separation of a hydrofining-hydro-upgrading reaction effluent enters an isodewaxing reactionzone, and different types of API III <+> lubricating oil base oil products are obtained through separation and fractionation of an isodewaxing reaction effluent. The method has the advantages of simple process flow and wide raw material adaptability, and can be suitable for the process of producing special oil products with good stability by Fischer-Tropsch synthetic oil fraction hydrogenation.

The invention discloses a supplementing refining catalyst for preparing 1,4-butanediol, a preparation method and application thereof. Compared with the prior art, the catalyst provided by the invention can be used for effectively removing colored impurities in 1,4-butanediol. Under the reaction condition according to the invention, the ultraviolet transmittance (UV value) of 1,4-butanediol under 220nm, 275nm and 350nm is increased to be more than or equal to 80%, 92% and 99% from 0.1%, 0.3% and 34.0%; the purity of the products can reach 99.8%; the polymer grade requirement is met; the reaction condition of the supplementing refining catalyst is mild; the pressure, temperature and hydrogen consumption are ultralow; the volume airspeed is ultrahigh; compared with rectifying purification, the supplementing refining catalyst is beneficial to the reduction of production cost.

Disclosed is a hydrogenation method for increasing cetane number of diesel oil. According to the invention, a reaction unit is provided with three sequentially arranged reaction zones; in a first reaction zone, a hydrobon catalyst I is filled and a hourly space velocity is 0.5 to 5.0 h <-1>; in a second reaction zone, a hydroupgrading catalyst is filled and a hourly space velocity is 1.0 to 8.0 h <-1>; in a third reaction zone, a hydrobon catalyst II is filled and a hourly space velocity is 1.5 to 12.0 h <-1>; the acidity of the hydrobon catalyst I is less than that of the hydrobon catalyst II. With the utilization of the method provided in the invention, cracking of open loops of annular aromatic hydrocarbons with more than two rings in the raw materials can be realized and the reaction of long-chain alkane cracking into short-chain alkane and the scission reaction of annular hydrocarbon with long side chains can be reduced; therefore, cetane number of diesel oil can be greatly increased under the condition that high yield of diesel oil is maintained.

The invention discloses an efficient hydrogenation process and system for producing hydrogen peroxide through an anthraquinone method. The efficient hydrogenation process comprises the following contents: (1) total hydrogen of the hydrogenation process is divided into two paths, namely hydrogen I and hydrogen II; the hydrogen I and a working solution enter hydrogen dissolving equipment, and thus the hydrogen I is dissolved in the working solution to obtain a hydrogen-dissolved working solution; (2) the hydrogen-dissolved working solution and the hydrogen II enter a mixer containing a ceramic membrane tube bundle, wherein the hydrogen-dissolved working solution enters the shell side outside the tube bundle, the hydrogen II enters the tube pass side inside the tube bundle, the hydrogen II radially passes through the tube wall of the ceramic membrane tube bundle to be dispersed into nano-sized/micron-sized minute bubbles, and the nano-sized/micron-sized minute bubbles act with the hydrogen-dissolved working solution on the shell side to obtain a microemulsion fluid; and (3) the microemulsion fluid enters a liquid phase hydrogenation reactor filled with a hydrogenation catalyst, a hydrogenation reaction is conducted, and a hydrogenation reaction product enter into the next procedure. According to the efficient hydrogenation process, by controlling the two different states of hydrogen in the working solution, the whole hydrogenation reaction is conducted in the liquid phase, the uniformity of the reaction is ensured while the hydrogenation reaction efficiency is improved, the side reaction is effectively controlled, and the anthraquinone consumption is greatly lowered.

The invention discloses a hydrogenation process for producing API III < + > lubricating oil base oil from Fischer-Tropsch synthetic oil. The Fischer-Tropsch synthetic oil is used as a raw material, and a hydrofining-hydro-upgrading-isodewaxing two-stage hydrogenation process is adopted to produce API III + lubricating oil base oil. The generated oil obtained by separation of hydrofining-hydro-upgrading reaction effluent enters an isodewaxing reaction zone; and the process further includes separating and fractionating the isodewaxing reaction effluent to obtain different types of API III + lubricating oil base oil products, cooling fractionated vacuum bottom oil to obtain an incompletely converted wax component, and returning the incompletely converted wax component to the hydro-upgrading reactor to continue the upgrading reaction. The invention has the advantages of simple process flow and wide raw material adaptability, and can be suitable for the process of producing special oil products with good stability by Fischer-Tropsch synthesis oil fraction hydrogenation.

The invention discloses a multi-component NiO/SiO2/F<->/SO4<2->/Al2O3 catalyst for preparing high-purity olefins by ether cracking and a preparation method thereof. According to the method, the catalyst comprises the following components in percentage by weight: 20-95% of Al2O3, 1-50% of NiO, 0.1-20% of SiO2, 0.1-10% of F<-> and 0.5-35% of SO4<2->. The catalyst is prepared by using an impregnation method, the operation is simple, the price is low, the catalyst can be used for preparing olefins by ether cracking at a lower temperature over present congeneric catalysts, the ether cracking is close to complete conversion while high olefin and methanol selectivity is guaranteed, and the air speed ratio of the reaction liquid is improved by 2-10 times over congeneric industrial catalysts.