7results about How to "Suitable for acidity" patented technology

The invention provides a diesel oil hydrofining catalyst. The diesel oil hydrofining catalyst comprises a modified alumina carrier and an active component, the active component is an oxide of active metal, and the active metal comprises at least one of Co, Mo, Ni and W; the modified alumina carrier is alumina hydrothermally modified by ammonium fluoborate; the B / L acid value of the modified alumina carrier is 0.07 to 0.15; the specific surface area is 240-400 m < 2 > / g, and the pore volume is 0.55-0.80 mL / g. The diesel oil hydrofining catalyst containing the B acid can promote removal of sulfides with steric hindrance in distillate oil through a direct desulfurization reaction path and a hydroisomerization-direct desulfurization reaction path, promote adsorption and removal of nitrides, and reduce mutual inhibition effect in the removal process of the sulfides and the nitrides; and the diesel oil hydrofining catalyst has excellent hydrogenation activity.

The invention relates to the technical field of flue gas treatment, and provides a high-capacity chlorinated hydrocarbon adsorbent as well as a preparation method and application thereof, the structural formula of the adsorbent is FexCuy-MOFs, and the atomic ratio x: y of Fe / Cu is 1: (4-19). According to the invention, the coupling effect of double metal ions (Fe < 3 + > and Cu < 2 + >) is utilized, so that the acidity of the adsorbent is moderate, and the attraction effect on chloride ions in chlorinated hydrocarbon is enhanced, so that the adsorption capacity on chlorinated hydrocarbon is increased; wherein the adsorption capacity to CH3Cl is 102.36 mmoL / g, the adsorption capacity to CH2Cl2 is 36.43 mmoL / g, the adsorption capacity to CHCl3 is 15.16 mmoL / g, the adsorption capacity to vinyl chloride is 10.68 mmoL / g, the adsorption capacity is greatly improved, and the industrial application value is very high.

The invention discloses a silicon-aluminum material and a preparation method thereof. After being roasted at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-75wt%, and the pore volume is 0.70-1.5 mL / g; and the specific surface area is 280-400 m < 2 > / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) uniformly mixing a silicon-containing compound A, an auxiliary agent A, an aluminum-containing compound and water to obtain a material flow A; (2) carrying out heat treatment on the material flow A in the presence of organic amine to obtain a material flow B; (3) uniformly mixing a silicon-containing compound B, an acidic aluminum-containing compound, an alkaline aluminum-containing compound and water, and treating to obtain a material flow C; (4) mixing the material flow C with an auxiliary agent B to obtain a material flow D; and (5) mixing the material flow B and the material flow D, carrying out hydrothermal treatment, and then washing, drying and roasting to obtain the silicon-aluminum material. The provided silicon-aluminum material shows certain molecular sieve characteristics, has the characteristics of high B acid content and stepped pore channel distribution, and is especially suitable for being used as a carrier of a hydrogenation catalyst.

This invention provides a method for producing lubricating oil base oil from heavy feedstock and the resulting lubricating oil base oil. The method includes: cutting the heavy feedstock to obtain a light component, a middle fraction, and a bottom wax; wherein the boiling point ranges of the light component, the middle fraction, and the bottom wax are 170-300℃, 300-500℃, and >500℃, respectively; subjecting the bottom wax to a first isomerization reaction under the catalysis of a first isomerization catalyst to obtain a first isomerization product; subjecting the first isomerization product and the middle fraction to a second isomerization reaction under the catalysis of a second isomerization catalyst to obtain a second isomerization product; subjecting the second isomerization product to hydrorefining; and then fractionating the obtained refined product to obtain the lubricating oil base oil. The lubricating oil base oil produced by this method has high yield, low pour point, low cloud point, and high viscosity index, making it a high-quality lubricating oil base oil.

The invention provides a preparation method of a modified Y molecular sieve, a nickel element and a stable element are loaded on the Y molecular sieve through dipping treatment, macropores are formed through roasting, and the stable element is one or more of lanthanum, sodium and potassium elements. The invention also provides the modified Y molecular sieve and application thereof. The invention further provides a preparation method of the tert-dodecyl mercaptan. The modified Y molecular sieve and the preparation method of the tert-dodecyl mercaptan using the modified Y molecular sieve as the catalyst, provided by the invention, have the advantages of simple and convenient process, high catalytic efficiency, no need of high cost and strong industrial practicability, so that the modified Y molecular sieve has very important economic value and social value.

The invention relates to a method for preparing 3, 4-dihydropyran. According to the method, tetrahydrofurfuryl alcohol is adopted as a reactant, and under the catalytic action of a modified aluminum oxide catalyst, 3, 4-dihydropyran is prepared through a reaction. The reaction conditions are as follows: the reaction is carried out in a fixed bed reactor at normal pressure, the reaction temperature is 250-340 DEG C, and the feeding mass space velocity of tetrahydrofurfuryl alcohol is 0.1-2.0 h <-1 >. The method is characterized in that modified aluminum oxide is used as a catalyst, the catalyst is simple to prepare and relatively good in stability and can efficiently catalyze tetrahydrofurfuryl alcohol to selectively generate 3, 4-dihydropyran, and the conversion rate of the catalyst is gt; the selectivity of the 3, 4-dihydropyran is gt; 95%. The method has the beneficial effects that after being modified, the industrial activated aluminum oxide is moderate in acidity, tetrahydrofurfuryl alcohol is efficiently catalyzed to be dehydrated to prepare the 3, 4-dihydropyran, high-temperature carbonization inactivation of a product is effectively avoided, and the service life is greatly prolonged; and the catalyst is low in price and simple to prepare, and has a good industrial application prospect.

The invention provides a method for producing lubricating oil base oil from a heavy raw material and the obtained lubricating oil base oil, and the method comprises the following steps: cutting the heavy raw material to obtain a light component, a middle fraction and tower bottom wax; wherein the boiling point ranges of the light component, the middle fraction and the tower bottom wax are 170-300 DEG C, 300-500 DEG C and gt respectively; 500 DEG C; performing a first isomerization reaction on the middle fraction under the catalytic action of a first isomerization catalyst to obtain a first isomerization reaction product; carrying out a second isomerization reaction on the tower bottom wax under the catalytic action of a second isomerization catalyst to obtain a second isomerization reaction product; and mixing the first isomerization reaction product and the second isomerization reaction product, performing hydrofining, and performing fractionation cutting on the obtained refined product to obtain the lubricant base oil. The lubricating oil base oil product produced by the method provided by the invention is high in yield, low in condensation point and high in viscosity index, and is high-grade lubricating oil base oil.