156results about How to "High aroma" patented technology

Disclosed is a combined process for hydrotreating and catalytic cracking of residue, wherein the residue, catalytic cracking heavy cycle oil with acidic solid impurity being removed, optional distillate oil and adistillate of catalytic cracking slurry oil from which the acidic solid impurity is removed are fed into residue hydrotreating unit, the hydrogenated residue obtained and optional vacuum gas oil are fed into catalytic cracking unit to obtain various products; the catalytic cracking heavy cycle oil from which the acidic solid impurity is removed is circulated to the residue hydrotreating unit; the catalytic cracking slurry oil is separated by distilling, the distillate of the catalytic cracking slurry oil after removing off the acidic solid impurity is circulated to the residue hydrotreating unit. This process makes the residue hydrotreating and catalytic cracking being combined together more effectively such that it is not only able to improve product quality of the residue hydrotreating, elongate operation cycle of the residue hydrotreating unit, but also increases the yield of the hydrogenated diesel oil and catalytic cracking light oil, and decreases coking quantity of the catalytic cracking.

Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain gas, hydrogenated naphtha, hydrogenated diesel oil, and hydrogenated tail oil; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products to obtain dry gas, hydrogenated naphtha, liquefied petroleum gas, catalytic cracked gasoline, catalytic cracked diesel oil, and catalytic cracking cycle oil; wherein the hydrogenated tail oil and / or normal catalytic cracking feedstock oil are separated into at least two fractions, the light and the heavy fractions or normal catalytic cracking heavy feedstock oil and normal catalytic cracking light feedstock oil, prior to contacting the hydrogenated tail oil and / or normal catalytic cracking feedstock oil with the cracking catalyst. The process according to the present invention is especially suitable for conversion of hydrocarbon oils to produce more products of gasoline or diesel oil.

The invention provides a processing method of green tea, which is used for solving the problem of bitter taste of a large amount of green tea produced in Sichuan province. The processing method of the green tea is characterized by comprising the following steps of: picking fresh leaf, tedding green leaves, deactivating enzymes, rolling, conducting first-step roasting, conducting secondary rolling, conducting deblocking, conducting second-step roasting, spreading and airing, roasting to be dry, spreading and airing, and drying and extracting flavor, wherein twice rolling processes are carried out by hot rubbing. According to the processing method of the green tea, the bitter taste of the large amount of the green tea produced in the Sichuan province can be effectively reduced, the quality of tea leaves can be improved, and the heavy, mellow, fresh and brisk degrees can be increased; and the good foundation is established for expanding the tea markets of Sichuan and promoting the export of the tea in Sichuan.

Disclosed is a combination process for improved hydrotreating and catalytic cracking of hydrocarbon oils, including: contacting residual oil, catalytic cracking cycle oil, and optional distillate oil with a hydrotreating catalyst under hydrotreating conditions in the presence of hydrogen followed by separation of the reaction products to obtain hydrogenated tail oil and other products; contacting the hydrogenated tail oil and optional normal catalytic cracking feedstock oil with a cracking catalyst under catalytic cracking conditions followed by separation of the reaction products; wherein the hydrogenated tail oil and / or normal catalytic cracking feedstock oil are separated into at least two fractions prior to contacting the hydrogenated tail oil and / or normal catalytic cracking feedstock oil with the cracking catalyst.

The invention discloses a tea making process for stale flavor orchid-flavored Danchongcha. The tea making process comprises the following steps: (1) fresh leaf picking; (2) sun-withering; (3) leaf cooling; (4) green leaf making; (5) de-enzyming; (6) rolling; (7) roasting; (8) aging; and (9) packaging. According to the stale flavor orchid-flavored Danchongcha prepared by the tea making process disclosed by the invention, the strip shape of the tea is robust and bead-shaped, the tea is olivine in color and luster, pure and lofty in fragrance, the fragrance of the tea is slightly like fragrance of gardenia, the tea is stale flavored and mellow in taste, strong in sweetness after taste, golden and bright in tea soup and smooth and heavy in taste.

The invention belongs to the field of catalytic slurry oil deep processing and particularly relates to a system device for producing needle coke crude oil through catalytic slurry oil. According to the device, a mixer 1, the top of a catalytic slurry oil extraction tower 2, the top of an aromatic-hydrocarbon-rich oil separation tower 4 and the top of an aromatic-alkane-rich oil separation tower 5 are sequentially connected through pipelines. The bottom of the catalytic slurry oil extraction tower 2 is connected with a gas stripping tower A8-1. The bottom of the aromatic-hydrocarbon-rich oil separation tower 4 is directly connected with a gas stripping tower B8-2. The bottom of the aromatic-alkane-rich oil separation tower 5 is connected with a gas stripping tower C8-3. A gas outlet of the gas stripping tower A8-1, a gas outlet of the gas stripping tower B8-2 and a gas outlet of the gas stripping tower C8-3 are sequentially connected and then connected with a condenser 7 and a solvent tank 6, and the bottom of the gas stripping tower B8-2 is connected with a hydrofining reactor 9. The device fully utilizes petroleum resources and turns waste into wealth, the catalytic slurry oil can be utilized at high value, and the produced needle coke crude oil can serve as needle coke raw materials high-additional-value products.

The invention discloses a coal tar and residuum hydrocracking-delayed coking combination processing method which is as follows: light and heavy coal tar are obtained by reduced pressure distillation of coal tar; the light coal tar is mixed with and residuum, and enters a fluidized bed reactor together with hydrogen to contact a hydrocracking catalyst for hydrocracking reaction, a hydrocracked effluent is separated to obtain a gas and a liquid phase product, gasoline, diesel, vacuum gas oil and tail oil are obtained by fractionation of the liquid phase product; the tail oil and the heavy coal tar together enter a delayed coking unit for thermal cracking reaction to obtain coker dry gas, coker gasoline, coker diesel oil, coker gas oil and coke. The process method can improve the conversion rate of raw materials, reduce coking, increase the yield of light oil, and prolong the device operation cycle, and provides a processing method for low-added-value coal tar and residuum to improve the economical efficiency.