155results about "Mineral wax recovery/refining" patented technology

The present invention relates to wax dielectric for heating temperature control valve and its preparation process. The destination product is prepared with fluid wax, wax paste, soap wax, etc containing C9-C20 components and through decompression distillation in 5-20 deg.c fraction width, sweating of the fractions in the smelting point temperature as the ultimate temperature, equal weight ratio mixing, refining and other technological steps. The product may be used in heating temperature controlling valve for temperature control in 5-30 deg.c and has basically the same stroke each degree of temperature. The product may be also used in other automatic temperature controlling devices.

The present invention relates to distillate fuels or distillate fuel blend stocks comprising a blend of a Fischer-Tropsch derived product and a petroleum derived product that is hydrocracked under conditions to preserve aromatics. The resulting distillate fuel product is a low sulfur, moderately aromatic distillate fuel. The resulting distillate fuel or distillate fuel blend stock exhibits excellent properties, including good seal swell, density, and thermal stability. The present invention also relates to processes for making these distillate fuels or distillate fuel blend stocks.

A chemical composition of matter comprising a wax plasticizing agent (plasticizer) tributoxyethyl phosphate, a mixture of selected long chain fatty acids (preferably C₁₀ to C₂₂), and a mixture of selected low-surface tension surfactants, which when added in solution to crude oil or refined products has been shown to lower both the B.S. & W. (rag layer) and the coefficient of friction of crude oils and refined products. This chemical composition of matter is particularly useful as a wax liquefaction, dispersant, and solubilization agent for asphaltene and paraffins in crude oil and refined products. The reduction in the co-efficient of friction resulting from the addition of this product to crude oil will allow crude oil to pump through pipelines with a minimum amount of resistance due to friction (drag).

The invention relates to a production method used for extracting lignite wax from lignite, which can effectively solve the problems that the lignite wax is difficult to be prepared, has small yield and can not meet the practical requirements. The technical proposal used for solving the problems is as follows: the lignite is crushed and prepared into grains, dried and sent to an extractor for carrying out extraction; the lignite grains with the lignite wax extracted are sent to a continuous dry desolventizer so as to remove an organic solvent; the lignite grains coming out of the dry desolventizer are used for extracting a humic acid; three-effectiveness separation of the organic solvent rich in lignite wax is carried out so as to remove 95 percent of the organic solvent; subsequently, vacuum condensation is carried out so as to obtain the lignite wax; and subsequently, the solvent is recovered and circularly used. The method has simple process, can carry out production of large scale in batches, has high production efficiency, low cost and no environmental pollution, saves material, is a great creation on the preparation of lignite wax, and the application of the method has huge economical and social benefits.

In crude oil fractions, fossil fuels, and organic liquids in general in which it is desirable to reduce the levels of sulfur-containing and nitrogen-containing components, the process reduces the level of these compounds via the application of heat, an oxidizing agent and, preferably, sonic energy. The invention is performed either as a continuous process or a batch process, and may further include optional steps of centrifugation or hydrodesulfurization.

During solvent dewaxing, the mixture of wax containing material oil, dewaxing solvent and dewaxing assistant is made to pass through two stages of dewaxing material oil and deoiling cerate; the filtrate from the deoiling stage is returned to the dewaxing stage completely; and dewaxed oil and deoiled wax are obtained after recovering the solvent. The dewaxing assistant is ashless polymer mixture of high branched chain degree polymer and low branched chain degree polymer. The method improves the crystal structure of wax, raises oil-wax separating effect, raises dewaxed oil yield and filtering speed obviously, lowers the solvent ratio and lowers the oil content in cerate. The cerate may be used in producing paraffin or microcrystal wax.

Facilities to convert natural gas into syncrude often are located at remote sites. At these sites and in their surrounding communities there exists demand for salable products: gasoline, distillate fuels, solvents, lubricants, etc. While it would be possible to produce these products from syncrude, the construction of such production facilities would be very expensive, and their operation would be difficult at the remote site. Fischer-Tropsch syncrude will be waxy and will also contain volatile components, complicating the shipping of both Fischer-Tropsch products from remote production sites to developed sites and salable products from developed sites to remote sites. This invention describes a safe process to both transport Fischer-Tropsch syncrude from the remote site to the developed site and supply salable products from the developed site to the remote site.

This invention relates to lubricant base oil having high viscosity indexes and low pour points, and particularly to lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, wherein (a) an average carbon number Nc in one molecule is not less than 28 but not more than 40, and (b) an average branch number Nb in one molecule calculated from a ratio of CH₃ carbon to total carbon determined by ¹³C-NMR analysis and the average carbon number Nc in one molecule is not more than (0.2Nc−3.1) but not less than 1.5.

A lignite wax green extractive solvent and its production are disclosed. The process is carried out by taking mixed solvent of cyclohexane and alcohol, crushing for lignite, screening, putting lignite coal grain into extractor, mixing with solvent in proportion of 1:1-1:4 while extracting, flash evaporating, recovering solvent, evaporating for residual mixed solvent by stewing system to obtain crude lignite wax, condensing for mixed solvent steam by heat exchanger, oil-water separating, delivering cyclohexane to solvent trough, separating tert-butyl from water while rectifying, inducing tert-butyl into solvent trough, inspecting cyclohexane or tert-butyl content, supplement cyclohexane and alcohol, mixing proportionally and using. It's cheap, simple reliable, and economical, it has more wax yield and no environmental pollution.

A process for making a lubricating base oil having a viscosity index of at least 110, comprising the steps of: combining a waxy light neutral base oil and a wax derived from pyrolyzing a plastics feed comprising polyethylene to form a blend; hydroisomerization dewaxing the blend; and recovering the lubricating base oil from an effluent from the hydroisomerization dewaxing step.

The present invention discloses a continuous material extraction system for continuously extracting valuable components in the material by means of a solvent, the system comprising: an extraction tank which is a sealed container being substantially parallelepiped, wherein in the longitudinal direction of the extraction tank, the extraction tank has a first end at which a material inlet is provided, and a second end, and a material outlet is provided at the first end or the second end; the upper portion of said extraction tank is provided with a solvent inlet, and the lower portion of said extraction tank is provided with a solution outlet; in the longitudinal direction of said extraction tank, the lower portion of said extraction tank is provided with an extraction bath which is applied for accommodating the solvent and the material, wherein in the longitudinal direction of said extraction tank said extraction bath is provided with a material conveying mechanism and an ultrasonic generator. The present invention further discloses a method of extracting valuable components in the material by the continuous material extraction system mentioned above.

The invention discloses an improved solvent dewaxing method, which is characterized by the following: adding ash-free macromolecular mixture with A) poly-alpha- olefin, B) polyethylene or ethane, propylene copolymer, C) alcohol polymer and derivant in the regular solvent dewaxing or solvent dewaxing de-oiling course; reducing oil content of dewaxing obviously to improve the quality of wax.

The invention provides a method for producing high purity montan wax, including solvent extraction; wherein no solvent for submerging montan is added in the extraction process, the solvent is composed of the following components by mass ratio: 20-100% of isopropanol and 0-80% of alcohol or hydrocarbon or water, the alcohol is one or more than one of methyl alcohol, ethyl alcohol and tertiary butanol, and the hydrocarbon is one or more than one of petroleum ether, solvent No. 6, normal hexane and cyclohexane. The invention thoroughly solves the problems that the existing extraction solvent benzene has high toxicity, pollutes the environment and is harmful to human body health. Besides, non-toxic isopropanol or isopropanol mixed solvent with extremely low toxicity is used for extracting montan wax in montan, impurity content in montan wax is effectively reduced, resin content is lower than 16%, asphaltos is lower than 6%, high purity product is obtained, product quality of montan wax isgreatly improved, and the difficult problem of the current montan wax extraction technology is solved, thus providing a beneficial approach for producing high quality montan wax in scale.

An initial chemical composition comprising selected surfactants, dispersants, and degreasers that liquefy, disperse, demulsify, degrease, inhibit corrosion and scale formation, and lower the pour point of a petroleum, coal, Fischer-Tropsch synthesized, or naturally occurring paraffin-based wax and asphaltene. Such a product is capable of converting crystalline wax (paraffin) in, for example, slop oil into an amorphous form of wax at room temperature, allowing the wax to be dissolved in, for example, crude oil without the need for heating, and maintaining it in solution at room temperature, substantially reducing, indeed in some applications, preventing, for example, wax build-up in pipelines, processing and transportation equipment, etc., and the recovery of the hydrocarbons in the slop oil. In a second aspect of the invention, the pre-blend addition of a hydrotrope-demulsifier, a chelating agent and a wax plasticizer can result in a BS&W of zero for the recovered hydrocarbon blend.

The invention provides a method for extracting wax in wood coal, which is characterized by comprising the following steps: adopting methylbenzene as extraction solvent, and extracting the wood coal for 30min-5h under the temperature condition of 10-100 DEG C according to the mass/volume ratio 1:2-4 of the wood coal to the methylbenzene. The wax has no harm to the environment and the human body, and the extracted wood coal wax has the quality, the mass, and the like similar to those of the wood coal wax extracted by benzene; in addition, the extraction method has simple process, convenient operation, non-toxicity, safety, high yield, and low cost, and is suitable for the mass production.

During direct production of paraffin or microcrystal wax, wax-containing material oil, dewaxing solvent and dewaxing assistant are mixed, and the mixture is cooled to -5 deg.c to -30 deg.c and separated to obtain wax product and dewaxed oil. The dewaxing assistant is ashless polymer mixture of high branched chain degree polymer and low branched chain degree polymer, the high branched chain degree polymer is polymethacrylate or polyolefin, and the low branched chain degree polymer is polyethylene or ethylene-propylene copolymer. The method improves the crystal structure of wax and raises oil-wax separating effect, and the oil-containing cerate obtained through the dewaxing process reaches the requirement of paraffin or microcrystal wax in oil content, and may be used in producing paraffin or microcrystal wax through refining.

The invention discloses a solvent and method for removing resin from lignite wax by virtue of a crystallization process, belonging to methods for removing resin from lignite wax. The method comprises the following steps: (1) heating and dissolving, namely putting lignite wax particles into a crystallization kettle, injecting a cyclohexane solvent or an acetic ester solvent according to a material-liquid mass ratio of 1:(5-50), stirring, heating the crystallization kettle by using steam, and controlling the pressure of the container to be 1.0-5.0 MPa until the lignite wax particles are dissolved; (2) cooling and crystallizing, namely after the lignite wax particles are dissolved, stopping heating, performing water cooling on the crystallization kettle until the temperature is between -10 and 20 DEG C, and keeping the low temperature for crystallization for 10-50 minutes; (3) filtering and drying, namely after crystallization, filtering to separate filter residues and filtrate, performing reduced pressure drying on the filter residues at 40 DEG C in a vacuum drying machine, and then performing press forming; and (4) recovering the filtrate, namely recovering by virtue of rectification, and separating the solvent and resin for recycling. The solvent adopted in the method disclosed by the invention is cyclohexane or acetic ester, and the two solvents are nontoxic, cause small harm to human bodies, are not corrosive, can be recycled, are harmless to the ecological environment and are environment-friendly.

The invention relates to a solvent dewaxing method of low-wax content hydrocarbon oil. The solvent dewaxing method comprises the following steps of mixing one or more raw material oil, one or more dewaxing assistants and dewaxing solvents, cooling to a filtration temperature, filtering to obtain a dewaxed solution and dewaxed cerate, removing the solvents in a dewaxed filtrate to obtain dewaxed oil, heating the dewaxed cerate until dissolution, cooling for crystallization, before dewaxed cerate heating dissolution and/or after dewaxed cerate heating dissolution, adding a deoiling solvent into the crystallized dewaxed cerate, cooling to a deoiling filtration temperature, and filtering to obtain a deoiled filtrate and deoiled cerate, wherein C17-C100 n-alkane mass content of the one or more dewaxing assistants is greater than or equal to 40% and a mass ratio of the one or more dewaxing assistants to the one or more raw material oil is in a range of (0.01: 1) to (0.3: 1). Compared with the conventional solvent dewaxing technology, the solvent dewaxing method provided by the invention can effectively remove wax in low-wax content hydrocarbon oil, reduce a dewaxing temperature difference and improve a filtration speed.

The invention belongs to the technical field of recovery from Fischer-Tropsch paraffin residues and particularly relates to a device and a method for recovering paraffin from the Fischer-Tropsch paraffin residues. The device comprises a pyrolysis furnace, a precipitator, a condensing device and a gas-liquid separator, wherein the pyrolysis furnace is connected with the precipitator which is connected with the condensing device, and the condensing device is connected with the gas-liquid separator which is connected with the pyrolysis furnace; an inner barrel and an outer barrel are arranged in the pyrolysis furnace, a boost screw is arranged in the inner barrel, and a flue is formed between the inner barrel and the outer barrel; the pyrolysis furnace is further provided with a nitrogen inlet and a residue discharge port. The device and the method have the advantages that the purpose of paraffin recovery is achieved through separation of the paraffin from catalyst residues, the effective constituent yield of the paraffin residues is higher than 82%, produced non-condensable gas returns to the hearth of the pyrolysis furnace for combustion, flue gas emission is reduced, and the method is a clean process for recovering the paraffin from the Fischer-Tropsch paraffin residues.

The invention discloses a lignite wax oxidizing and refining method which comprises the following steps: on the basis of taking degreased lignite wax as a raw material, refining the lignite wax by using a sectional method, firstly, performing primary rinsing by using peracetic acid and assistant, subsequently performing secondary rinsing by using hydrogen peroxide and hydrogen peroxide assistant, and finally drying and preparing a refined lignite wax product in a hot melting mode. The method disclosed by the invention is simple, feasible in technique, environment-friendly and energy-saving, the prepared wax is excellent in quality, and the method is an effective method for oxidizing and refining lignite wax of a non-chromium system.

The invention discloses a solvent dewaxing method by the use of a dewaxing assistant, comprising the following steps of: mixing molten dewaxing materials and a dewaxing assistant, adding a dewaxing solvent, and cooling to a dewaxing temperature. The addition mode of the solvent is a multipoint dilution method or a one-time full dilution method. Dewaxing oil and dewaxing cerate can be obtained by filtration and separation at the dewaxing temperature. The dewaxing assistant is Fischer-Tropsch synthetic wax with high-melting point. According to the invention, the filtration speed and the dewaxing oil yield are raised, and simultaneously the applied assistant needs not to be separated from wax and generates no unfavorable impact on wax properties.