53results about How to "Increased total liquid recovery" patented technology

A delay coking process able to flexible regulate the circualting ratio operation features that part of the circulating oil in reaction oil vapour of coking tower is separated out by the coking fractionation tower and then proportionally mixed with the raw material of coking tower. Its advantages are flexible regulation, high total liquid output, and high quality of coker wax oil.

The invention discloses a method and a device for gasoline upgrading, mainly solving the problems of high yield of dry gas and coke and low liquid recovery during the gasoline upgrading reaction in the double-riser catalytic cracking device, high energy consumption of the device and low desulphurization efficiency. The method is mainly characterized by the steps as follows: some of the regenerated catalysts returning to the heavy oil riser reactor; some of the regenerated catalysts mixing with the recycled catalysts from the rapid bed reactor in the catalysts mixer before contacting with the gasoline of poor quality and entering part I of the gasoline riser reactor, the rapid bed reactor, and the part II of the gasoline riser reactor; reactants flowing into a second settler for separation; upgrading reaction oil and gas entering the fractionation system for fractionating; spent catalysts entering the regenerators for coke burning regenerating. The invention can reduce dry gas and coke yield and improve the total liquid yield and meanwhile decrease the energy consumption of the whole device.

The invention relates to a high-stability modified Y-type molecular sieve and a preparation method thereof, wherein the modified Y-type molecular sieve contains 5-12 wt% of RE2O3 and 0.1-0.7 wt% of Na2O, and has the total pore volume of 0.33-0.39 mL / g, the pore volume of the secondary pores with the pore size of 2-100 nm accounts for 10-25% of the total pore volume, the unit cell constant is 2.440-2.455 nm, the non-framework aluminum content is not more than 20% of the total aluminum content, the lattice collapse temperature is not below 1050 DEG C, and the pyridine adsorption infrared methoddetermination results show that a ratio of the amount of B acid to the amount of L acid is not less than 2.50. The preparation method comprises: ion exchange, modification treatment at a certain temperature under water vapor conditions, and reaction with silicon tetrachloride. According to the present invention, the modified Y-type molecular sieve has advantages of high heavy oil conversion activity, low coke selectivity, high diesel yield, high liquefied gas yield, high light-oil yield and high total liquid recovery.

A cracking catalyst containing modified beta zeolite comprises 10 wt%-80 wt% of Y zeolite, 1-50 wt% of the modified beta zeolite, 5-70 wt% of clay and 5-60 wt% of a heat-resistant inorganic oxide; theanhydrous chemical expression formula of the modified beta zeolite is(0-0.2)Na2O.(0.5-15)MO2.(0.5-15)RE2O3.(0.5-15)Al2O3(60-98). SiO2 on the basis of oxide mass, wherein M is one or two substances selected from group IVB metals. The preparation method of the catalyst comprises mixing and beating of the Y zeolite, the modified beta zeolite, the clay, the heat resistant inorganic oxide, a binder and water and spraying drying. The catalyst has strong heavy oil cracking ability and high total liquid yield, and propylene in liquefied gas has high concentration.

A cracking catalyst containing modified beta zeolite comprises, by weight, 10-80% of Y type zeolite, 1-50% of modified beta zeolite, 5-70% of clay and 5-60% of heat-resistant inorganic oxide. The anhydrous chemical expression of the modified beta zeolite is, by mass of oxide, (0-0.2)Na2O.(0.5-15)ZrO2.(0-10)MxOy.(1-10)P2O5.(0.5-15)Al2O3.(60-98)SiO2, wherein M is one or more of Ti, Cr, Fe and Ga, x refers to the atomicity of M, y refers to a number required by the oxidation state of M. A preparation method of the catalyst includes the step that Y type zeolite, modified beta zeolite, clay, heat-resistant inorganic oxide, adhesive and water are mixed, pulped, sprayed and dried. The catalyst is high in hydrocarbon cracking capacity, high in liquefied gas yield and high in propylene concentration in liquefied gas.

The invention provides a catalytic cracking catalyst and a preparation method thereof, the catalyst is prepared from 15-60 wt% of molecular sieve, 15-60 wt% of clay, 10-30 wt% of pseudoboehmite, 5-20wt% of adhesive, 0.1-5 wt% of phosphorus-containing compound (calculated by P), 0.1-3 wt% of magnesium-containing compound (calculated by Mg), and may also contain 0-5 wt% of rare earth oxide. The preparation method comprises the following steps: (1) catalyst forming: mixing and pulping molecular sieve, clay, pseudoboehmite, phosphorus-containing compound and adhesive; then adding magnesium-containing compound to mix and pulp, heating and stirring, spraying and forming, and roasting to obtain the formed catalyst; (2) catalyst modification: mixing and pulping the formed catalyst, ammonium salt,phosphorus-containing compound and water, adjusting pH, heating and reacting, and filtering and drying to obtain the catalytic cracking catalyst of the invention. The catalytic cracking catalyst provided by the invention has the characteristics of low coke yield and high total liquid collection (liquefied gas, gasoline and diesel).

A delay coking process able to flexible regulate the circualting ratio operation features that part of the circulating oil in reaction oil vapour of coking tower is separated out by the coking fractionation tower and then proportionally mixed with the raw material of coking tower. Its advantages are flexible regulation, high total liquid output, and high quality of coker wax oil.

The invention relates to a super-stable Y-type molecular sieve containing phosphorus and rare earth, wherein the Y-type molecular sieve contains 4-11 wt% of rare earth, 0.05-10 wt% of phosphorus and 0.1-0.7 wt% of sodium oxide, and has the pore volume of 0.33-0.39 mL / g, the pore volume of the pores with the pore size of 2-100 nm accounts for 15-30% of the total pore volume, the unit cell constantis 2.440-2.455 nm, the non-framework aluminum accounts for less than 20% of the total aluminum, the lattice collapse temperature is more than 1050 DEG C, and a ratio of the amount of B acid to the amount of L acid is not less than 2.50. The preparation method comprises: preparing a rare earth-containing Y-type molecular sieve having a conventional unit cell size, calcining for 4.5-7 h at a temperature of 350-480 DEG C under 30-90% by volume of steam atmosphere, carrying out phosphorus modification treatment, and carrying out a contact reaction with silicon tetrachloride gas. According to the present invention, the Y-type molecular sieve has advantages of good hydrothermal stability, high heavy oil conversion activity, low coke selectivity, high heavy oil conversion diesel yield, high liquefied gas yield and high total liquid recovery.

The invention discloses a catalytic cracking method and a catalytic cracking device. According to the invention, raw oil enters the lower part of a riser reactor, and is subjected to a contact reaction with a catalyst from a catalyst pre-lift mixer; oil gas obtained after reaction is separated from spent catalyst; reaction oil gas obtained by separation is delivered into a fractionating tower, and the separated spent catalyst is regenerated; part of high-temperature regenerated catalyst after regeneration enters an external heat remover; part of cooled regenerated catalyst is delivered back to the regenerator, another part of the cooled regenerated catalyst enters the catalyst pre-lift mixer, and a third part of the cooled regenerated catalyst enters the riser reactor from different height positions of the riser. The method provided by the invention can be used for reducing dry gas and coke total yield. A total liquid yield is increased by more than 1.5 percentage points; gasoline olefin volume content is reduced by 5-15 percentage points; and SOx content in flue gas is reduced by more than 30%.

Belonging to the technical field of catalytic cracking for petroleum refining, the invention relates to a method for reducing emission of carbon dioxide in catalytic cracking flue gas. The method comprises the steps of: conducting emulsification to a catalytic cracking raw material under the conditions of normal pressure, an emulsification of 45-90DEG C, a water adding amount of 1%-10%, a multifunctional composite emulsifier adding amount of 0.01%-2%, and a stirring speed of 15000-20000r / min, and subjecting the emulsified raw oil to direct catalytic reaction as a catalytic material. After emulsification of a heavy oil catalytic cracking raw material, the atomization degree and dispersibility of catalytic charged material are improved, and particle sizes of charged droplets are greatly reduced, thus reaching the purposes of enhancing light oil yield and total liquid yield, lowering coke yield so as to reduce the content of carbon dioxide in flue gas.

The invention relates to a method for emulsification continuous feeding of a heavy oil weight catalytic cracking raw material, comprising the following steps of: mixing and emulsifying the catalytic cracking raw material, a compound emulsifier and water; and directly introducing emulsified emulsifying oil into a catalytic device for catalytic reaction, wherein the emulsifying is carried out at normal pressure and the temperature of 50-95 DEG C, the water adding quantity accounts for 1-15% of the mass of the emulsifying oil, the adding quantity of the compound emulsifier accounts for 0.01-2% of the mass of the emulsifying oil, and the stirring speed is more than 15,000r / min. In the invention, the emulsified emulsifying oil as the catalytic raw material is directly introduced into the catalytic device for catalytic reaction without utilizing a buffer oil tank in the middle process, the dwell time after emulsification is short and the emulsion breaking problem is unavailable. After the heavy oil catalytic cracking raw material is emulsified, the dispersity and the atomization degree of the catalytic cracking feeding are improved, the atomization efficiency is enhanced, the particle diameter of feeding oil drop is greatly reduced, an oiling agent is ensured to be effectively contacted, the cracking depth is increased, and the purposes of enhancing the yield of light weight oil and the total liquid yield and reducing the yield of coke can be achieved.

The invention provides a catalytic cracking catalyst. The catalytic cracking catalyst contains clay, an alumina binder and a modified Y type molecular sieve. The modified Y type molecular sieve comprises 5 to 12 wt% of rare earth and no more than 0.5 wt% of sodium oxide, and has a total pore volume of 0.36 to 0.48 mL / g; the pore volume of secondary pores accounts for 20 to 38% of the total pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is higher than 1060 DEG C; and a ratio of the amount of acid B to the amount of acid L is no less than 3.50. A preparation method for the catalytic cracking catalyst comprises the following steps: preparing a rare earth-containing Y type molecular sieve with a conventional cell size; carrying out roasting in a water vapor atmosphere with a temperature of 350 to 520 DEG C and a volume percentage of 30 to 95% for 4.5 to 7 h; carryingout a contact reaction with silicon tetrachloride; and carrying out acid treatment. The catalyst has higher heavy oil conversion activity, low coke selectivity, and higher gasoline yield, liquefied gas yield, light oil yield and total liquid yield.

The invention provides a secondary-pore-rich modified Y type molecular sieve containing rare earth, and a preparation method thereof. In the modified Y type molecular sieve, the content of rare earthis 5 to 12 wt%; the content of sodium is no more than 0.5 wt%; a total pore volume is 0.36 to 0.48 mL / g; the pore volume of secondary pores accounts for 20 to 38% of the total pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is higher than 1060 DEG C; and a ratio of the amountof acid B to the amount of acid L is no less than 3.50. A preparation method for the modified Y type molecular sieve comprises the following steps: preparing a rare earth-containing Y type molecular sieve with a conventional cell size; carrying out roasting in a water vapor atmosphere with a temperature of 350 to 520 DEG C and a volume percentage of 30 to 95% for 4.5 to 7 h; carrying out a contactreaction with silicon tetrachloride; and carrying out acid treatment. The modified Y type molecular sieve has higher heavy oil conversion activity, low coke selectivity, and higher diesel oil yield,light oil yield and total liquid yield.

The invention provides a catalytic cracking catalyst. The catalytic cracking catalyst contains clay, alumina containing an additive and a modified Y type molecular sieve. The modified Y type molecularsieve comprises 5 to 12 wt% of rare earth and no more than 0.5 wt% of sodium oxide, and has a total pore volume of 0.36 to 0.48 mL / g; the pore volume of secondary pores accounts for 20 to 38% of thetotal pore volume; a lattice constant is 2.440 nm to 2.455 nm; the content of non-framework aluminum is no more than 10% of total aluminum content; lattice collapse temperature is higher than 1060 DEGC; and a ratio of the amount of acid B to the amount of acid L is no less than 3.50. A preparation method for the catalytic cracking catalyst comprises the following steps: preparing a rare earth-containing Y type molecular sieve with a conventional cell size; carrying out roasting in a water vapor atmosphere with a temperature of 350 to 520 DEG C and a volume percentage of 30 to 95% for 4.5 to 7h; carrying out a contact reaction with silicon tetrachloride; and carrying out acid treatment. The catalytic cracking catalyst has higher heavy oil conversion activity, low coke selectivity, and higher gasoline yield, liquefied gas yield, light oil yield and total liquid yield.

The invention discloses a low-coking catalytic cracking catalyst and a preparation method thereof. The catalyst contains medium and macroporous silicon-aluminum materials, and its anhydrous chemical expression is: (0-0.3)Na based on the weight of oxides. 2 O:(2‑18)Al 2 o 3 :(82‑98)SiO 2 ; its pore volume is 0.8‑2mlg ‑1 , the specific surface area is 150‑350m 2 g ‑1 , the most probable pore size is 30-100nm, the B / L acid ratio is 0.8-2.0; the catalyst also contains phosphorus and rare earth modified Y-type molecular sieves, and the molecular sieves contain RE in weight percent 2 o 3 is 0.8-4.0wt%, P is 0.5-5.0wt%, the unit cell is 2.435-2.442nm, and the crystallinity is 45-55%. The catalyst of the invention has the characteristics of high total liquid yield and low coke yield.

The invention discloses a preparation method of a catalytic cracking anti-calcium catalyst. The method comprises the following steps that 1, clay beating is conducted, a zirconium compound and a titanium compound are added, and filtration is conducted; 2, filter cakes obtained in the step 1 are dried and calcinated, and the calcination temperature is 400-600 DEG C, and the time is 0.5-2 hours; 3,calcined materials in the step 2 are beat and ground again, and the average particle size is smaller than or equal to 5 microns; 4, an aluminum compound and modified REY are sequentially added into slurry obtained by the step 3, and acidification is conducted to obtain gel; 5, spraying drying is conducted, collected particles are calcined, washed and filtered, and a phosphorus compound is rinsed;6, the filter cakes obtained in the step 5 are dried to prepare the catalyst. In industrial application, through addition of the anti-calcium catalyst, the total liquid yield of products is increased,and the gasoline liquid yield is also increased.