441results about "Petroleum wax refining" patented technology

A process for producing a product slate, which includes at least three base oil grades having kinematic viscosities at 100° C. within the range between about 1.8 cSt and 30 cSt, from a waxy feed having an initial boiling point of about 340° C. or less and a final boiling point of about 560° C. or higher, said process comprising (a) isomerizing at least a portion of the waxy feed, whereby the amount of isoparaffins present are increased; (b) distilling a first portion of the isomerized waxy feed in light block mode operation into at least three base oil fractions having different boiling ranges; (c) distilling a second portion of the isomerized waxy feed in medium block mode operation into at least three base oil fractions having different boiling ranges; and (d) blending at least one base oil fraction produced from light block mode with at least one base oil fraction produced from medium block mode to produce a lubricating base oil blend meeting a target value for at least one pre-selected property.

A process for isomerization dewaxing of a hydrocarbon feed which includes contacting the hydrocarbon feed with a large pore size, small crystal size, crystalline molecular sieve and an intermediate pore size, small crystal size, crystalline molecular sieve to produce a dewaxed product with a reduced pour point and a reduced cloud point. In a preferred embodiment, the feed is contacted with the molecular sieves sequentially, first with the large pore sieve followed by the intermediate pore sieve.

The invention relates to a method for preparing a petroleum wax hydrofining catalyst. The method comprises the following steps of: weighing boehmite, adding a silicon-containing compound in an amount which is 6 to 17 percent based on the weight of the boehmite and phosphorus-containing organic compound solution in an amount which is 2 to 20 percent based on the weight of the boehmite, and extruding and forming on an extruder; drying at the temperature of between 100 and 120 DEG C; baking at the temperature of between 500 and 700 DEG C to obtain a gamma-Al2O3 carrier containing silicon and phosphorus, wherein the silicon-containing compound is silica solution of which SiO2 accounts for 30 percent based on the weight of the silica solution, or nano-silica; the active ingredients are one or two of NiO and Moo3, and WO3; NiO accounts for 2 to 7 percent based on the total mass of the catalyst, and MoO3 and/or WO3 account for 28 to 32 percent based on the total mass of the catalyst; the prepared catalyst has intensively distributed pores and appropriate surface acidity and still has high hydrogenation activity at a low reaction temperature and under a low reaction pressure.

The invention discloses a petroleum wax hydrofining catalyst and its preparing method, using Wu, Mo and Ni (or Co) as active metals and using the aluminum oxide containing Si and P auxiliaries to act as a carrier and its preparing method: it dips the aluminum oxide carrier in the Wu-Ni/Co water solution and the Mo-B water solution, respectively, so as to make it. The aluminum oxide carrier is prepared by using the Si-containing aluminum hydroxide prepared by CO2 neutralization process and then adding in the P-containing compound in the forming process. Its preparing process is simple and low-cost. The invention can effectively regulate the physico-chemical property of a catalyst by the cooperative regulation of the two compound auxiliaries, making the catalyst have reasonable aperture structure and proper surface acidic property. This catalyst can process the petroleum waxes including high-melting point petroleum wax and produce food-grade petroleum wax products.

The invention discloses a petroleum wax hydrogenation catalyst and its preparing method, adopting the Si- and P- containing aluminum hydroxide prepared by CO2 netur neutralization process to act as a carrier material of catalyst, where the Si and P auxiliaries are added in steps, some Si- and P- containing compounds mix with sodium meta-aluminate solution to form a glue, some Si-containing compounds are added after the glue is formed or in the ageing process, and most P-containing compounds are added in the process of peptizing or pulping the produced aluminum hydroxide after washed, thus making most Si and P are distributed on the surface of aluminum hydroxide, effectively give full play to the Si and P cooperatively regulating surface physico-chemical property and hole structure of the catalyst. Its preparing process is simple and low-cost. It has good activity and selectivity as processing petroleum waxes including high-melting point petroleum wax.

The invention discloses a method for refining and deoiling paraffin for pharmaceutic adjuvants, and belongs to the field of medical materials. The method disclosed by the invention comprises the following steps of: refining hydrogenant paraffin which is used as a raw material by adopting an active substance so that the paraffin is effectively deodorized, de-colored and deodorized and the paraffin is odorless and tasteless; 'sweating' the paraffin by using a deoiling box so that the paraffin is deoiled and the oil content of the paraffin is reduced, wherein the active substance is active carbon, diatomite and/or active floridin; and the deoiling box is a device which enable the paraffin to be sweated according to a principle that heating is performed by using different melting points of the paraffin so that oil is separated to be infiltrated to the surface of the paraffin, and the deoiling effect of the deoiling box is that the oil content is reduced from 0.5 percent to 0.3 percent, so that the oil content is effectively reduced and the paraffin is difficult to oxidize. The invention aims to widen the application field of the paraffin, and widen the application field of the paraffin from food industry and daily chemical industry to pharmaceutic adjuvant industry; and the paraffin is mainly used as an ointment base hard-enhancing component and a sustained-release material in medicaments.

The invention relates to a Fischer-Tropsch synthesis wax refinement method, which comprises that: a crude wax component from a Fischer-Tropsch synthesis system is subjected to hydrogenation refinement, and then is conveyed to a sweating tank through a raw material pump, sweating is performed to remove lipid materials in the wax component, and the obtained material enters the next process device. According to the method, the sweating process is adopted to remove the lipid materials in the wax component, such that characteristics of simple process, low energy consumption and environment protection are provided; and candles produced by the raw material refined by the method have characteristics of smooth appearance, no toxicity, no odor and no smoke during burning, and no harm on human body.

The invention provides a method for processing Fischer-Tropsch wax production series products. The method comprises: carrying out hydrofinishing on a Fischer-Tropsch wax raw material F to prepare a hydrofinished material FR; separating FR to obtain a light component material L and a heavy material H; carrying out oil removing operation on L to obtain an oil-removed light component material LDO; separating LDO to obtain a light component material LL1 and a remaining component material LH1; carrying out improvement of physicochemical properties on LL1 and forming so as to obtain a lightweight product LP1; treating LH1 according to the processes of the steps (4) and (5) to obtain a lightweight product LP2 and a remaining component material LH2; treating LH2 according to the processes of the steps (4), (5) and (6) to finally obtain a series of lightweight products LP3,..., LPN, and LPNN; separating H to obtain a light component material HL1 and a remaining component HH1; carrying out improvement of physicochemical properties on HL1 andforming so as to obtain a heavyweight product HP1; treating HH1 according to the processes of the steps (8) and (9) to obtain a heavyweight product HP2 and a remaining component material HH2; and treating HH2 according to the processes of the steps (8), (9) and (10) to finally obtain a series of heavyweight products HP3,..., HPN, and HPNN.

The invention relates to the field of production of high melting-point wax, and discloses a method for producing high-grade wax by Fischer-Tropsch synthesis crude wax. The method comprises the following steps: A) a hydrogenation saturation step: performing hydrogenation saturation on a raw material; B) primary separation: placing the saturated raw material in the step A) in a primary rectification unit, rectifying the raw material under certain pressure and temperature effects to obtain a light component, soft wax and crude hard wax; C) secondary separation: placing the crude hard wax obtained in the step B) in a secondary distillation unit, evaporating the material under certain pressure and temperature to obtain a first gas phase and a liquid phase; and D) third separation: placing the liquid phase in a third distillation unit, evaporating the material under certain pressure and temperature to obtain a second gas phase and superhard wax; wherein the primary rectification unit is a vacuum rectifying tower. The method can reduce the hardware cost of the employed distillation units in the separation process and increases the economic performance of a Fischer-Tropsch device.

The invention discloses a technology for recycling a paraffin-resin mold material and particularly belongs to a technology for recycling a mold material of a precise mould. The technology for recycling the paraffin-resin mold material performs full reaction on hydrochloric acid and an alkali substance waterglass sodium silicate in a recycled paraffin-resin mold material to obtain a finished product in a steam heating way. The technology for recycling the paraffin-resin mold material has the advantages of simple process, convenience in operation, capability of effectively removing the alkali substance and granular impurities from the recycled paraffin-resin mold material, and reusability of the recycled paraffin-resin mold material.

The invention relates to a method for in-depth hydrogenation and dearomatization of vaseline. According to the method, a vaseline raw material and hydrogen enter into a first reactor at first and contact with a sulfided non-noble metal hydrorefining catalyst for desulphurization, denitrification, deoxidation and partial aromatic saturation; then a reaction product of the first reactor undergoes gas-liquid separation in a high pressure separator, and an obtained liquid phase and fresh hydrogen enter into a second reactor which employs a noble metal catalyst for aromatic saturation; a reaction product of the second reactor undergoes gas-liquid separation, an obtained liquid phase is subjected to removal of light hydrocarbon and odor so as to obtain a vaseline product, and an obtained gas phase enters into the first reactor and is used as supplementary hydrogen for the first reactor; and hydrogen partial pressure of the first reactor and the second reactor is 5 to 10 MPa. With the method provided by the invention, the high-quality vaseline product can be obtained at a low reaction pressure, and equipment investment and operation cost are reduced.

The present invention is paraffin hydrorefining catalyst and its preparation process. New type of gamma-Al2O3 carrier is first prepared via adding boron compound or boron-containing halide for excellent surface structure favorable to the dispersion of active metal. The carrier is then soaked in Mo-Ni-P solution, and through drying, roasting and other steps, Mo-Ni-P/B2O3-Al2O3 catalyst is prepared. During the preparation of the catalyst, the condition is controlled and optimized for homogeneous dispersion of the metals on the surface of B2O3-Al2O3, proper distribution of active components and even raised reducing performance. The catalyst has excellent paraffin hydrorefining performance, even if in reduced metal loading amount, and excellent paraffin decolorizing performance.

The invention relates to a phase-change paraffin preparation method, and belongs to the technical field of pharmaceutical and chemical engineering. The phase-change paraffin preparation method is simple in technology; by means of the method, demand-based customized production can be achieved, waste can be reduced, cost can be lowered, and economic benefits can be effectively increased. According to the technical scheme, the phase-change paraffin preparation method includes the following steps that coal is subjected to gasification production to obtain synthesis feed gas, the feed gas is subjected to a Fischer-Tropsch synthesis reaction to obtain Fischer-Tropsch synthesis products, the Fischer-Tropsch synthesis products are subjected to a hydrogenation reaction to obtain a wide-fraction mixture, namely, Fischer-Tropsch synthesis paraffin, the Fischer-Tropsch synthesis paraffin is subjected to molecular short steaming and rectification to obtain refined paraffin products with different phase change enthalpy values, and NNO is added to obtain stable phase-change paraffin.

The invention relates to a preparation method of food-grade microcrystalline wax. The preparation method comprises the following steps that blended oil comprising paraffin-based slag-reduced deasphalted oil and naphthenic base slag-reduced deasphalted oil is used as a raw material, is fed into a first reaction bed layer and then undergoes a hydrotreatment modification reaction; the reaction product is fed into a stripping tower and the stripped product is fed into a second reaction bed layer and undergoes a hydrofining reaction to produce hydrofined product oil; the hydrofined product oil is cut by atmospheric and vacuum fractionation equipment to form a heavy lubricant component having a temperature of 480-750 DEG C; the heavy lubricant component and an acetone-benzol dewaxing solvent are mixed; the mixture is cooled to below -15 DEG C; the cooled mixture is filtered so that dewaxed filtrate and deoiled wax are obtained; the deoiled wax is mixed with carclazyte by stirring; and the mixture is filtered so that the carclazyte is removed and the food-grade microcrystalline wax is obtained. The food-grade microcrystalline wax has Seybolt color number greater than +25, a drop melting point of 67-92 DEG C, a needle penetration degree of 15-35(1/10mm), oil content of 0.85-3.0%, sulfur and nitrogen content less than 1 microgram per gram and heavy metal and arsenic content less than 1mg/kg.

The invention disclosed a method of ozocerite hydrogenation refinement, which adopts ozocerite hydrogenation refining catalyst and hydrogenation isomerizing catalyst as the two main catalysts. Under the ozocerite hydrogenation refining conditions, the ozocerite contacts the two catalysts one by one. The invention can not only get refined ozocerite products with low sulphur and nitrogen content, low polycyclic aromatic hydrocarbon content, it can also decrease the content of ortho- diolefine in the ozocerite and overcome the defects of poor tenacity and brittleness. The ozocerite produced according to the invention can be used in food, medicine and cosmetics.

The invention relates to a method for production of high-melting-point petroleum wax. The method comprises the steps of: firstly making a deoiling raw material contact a petroleum wax hydrofining catalyst to undergo refining reaction under a hydrofining condition, subjecting the deoiling raw material undergoing hydrofining to deoiling by a solvent to produce deoiled wax. According to the method provided by the invention, the solvent used in the solvent deoiling process is a mixed solvent of tert-butyl-containing asymmetric ether and C3-C6 aliphatic ketone. Production of high-melting-point petroleum wax by the method provided by the invention can improve the filtration speed of solvent deoiling by 20%-35% and increase the yield of deoiled wax by 1%-3%.

The petroleum wax hydrofining process is one process in single reactor with two kinds of graded and filled catalyst. Under hydrofining condition, the petroleum wax is first contacted with Mo-Ni catalyst, the refined product is then mixed with cold hydrogen and the mixture is finally contacted with W-Ni catalyst to obtain refined product with low S and N content and low fused ring arene content. The product has obviously improved stability. The said petroleum wax material includes paraffin and microcrystalline wax, and petroleum wax product of the present invention may be used in food product,medicine and cosmetics.

The invention discloses a method for improving petroleum wax smell and appearance. According to the method, deoiled wax obtained after a solvent recovery process of a solvent dewaxing device contacts clay; a mixture is separated, such that clay refined wax is obtained; through solvent dewaxing solvent recovery, the content of a toluene solvent in deoiled wax is no higher than 300mg/kg; the clay refined wax is subjected to inert gas stripping in a stripping tower, such that substances influencing the smell and appearance of the petroleum wax are removed, and a wax product meeting the petroleum wax standard requirement is obtained. After a period of time of storage, the petroleum wax obtained after clay refining and inert gas stripping is prevented from a bulge phenomenon.

The invention discloses a production method of vaseline. The method comprises the following steps: 1, blending HVI650 cerate, reduced pressure distillate oil base oil and selective reduced pressure residual oil light removal cerate which are treated as raw materials; 2, hydrotreating the obtained blended mixture through first-stage series hydrofinishing with a fixed bed; and 3, allowing the blended mixture to go through a first reactor and a second reactor under hydrofinishing conditions, wherein the first reactor is filled with a hydroisomerizing catalyst and a hydrofinishing catalyst, and the second reactor is filled with a hydrofinishing catalyst. The method of the invention allows high quality vaseline products to be obtained by treating raw materials which cannot be vaseline raw materials in the prior art as the vaseline raw materials, blending the raw materials with a proper process and hydrogenating the raw materials, so the vaseline raw material source is enlarged, the HVI650 cerate utilization approach is widened, and economic benefits are improved.