1357 results about "Isobutylene" patented technology

The invention discloses a film-forming composition and a lip makeup product containing the same. The film-forming composition comprises the following components: phenyl silicone oil, wherein the phenyl silicone oil comprises two or more than two of diphenyl polydimethylsiloxane, trimethyl pentaphenyl trisiloxane, phenyl polytrimethyl siloxane and trimethyl siloxy phenyl polydimethylsiloxane; the viscosity of the phenyl silicone oil at the temperature of 25 DEG C is 50 mPa.s to 500 mPa.s; the film-forming agent comprises at least one of hydrogenated polyisobutene and polyisobutene; and the viscosity of the film forming agent at 75 DEG C is 1500 mPa.s to 2500 mPa.s. The mass ratio of the phenyl silicone oil to the film-forming agent is (2-5): 1. The film-forming composition provided by the invention is applied to a formula system of a lip makeup product, and the phenomena of cup staining, fading and the like of the lip makeup product can be reduced.

The invention discloses a single-ion conductor polymer, a ternary composite binder solution, high-solid-content sulfide electrolyte slurry and a wet film forming method and application thereof, and belongs to the technical field of all-solid-state lithium batteries. The key technical problems in the wet membrane preparation of the sulfide electrolyte are solved through an innovative solvent-binder synergistic system, and the method specifically comprises the steps that 1, through the synergistic effect of a non-polar solvent and a weak-polar solvent, low-viscosity coating of high-solid-content slurry is achieved while the chemical stability of the sulfide electrolyte is guaranteed; 2, a poly (lithium styrenesulfonate-butyl acrylate), styrene butadiene rubber and polyisobutene ternary composite binder is designed, a lithium ion transmission channel is provided through a lithium sulfonate group, a benzene ring structure in the styrene butadiene rubber enhances the mechanical strength, long-chain alkane in the polyisobutene improves the interface adhesive force, and the mechanical strength is improved; the three components cooperate to realize balance of mechanical and electrochemical properties of the electrolyte membrane, so that the prepared electrolyte membrane has low porosity, high ionic conductivity and mechanical strength.

The invention belongs to the technical field of coking product extraction and organic separation, and particularly relates to a method for refining 2, 3, 5-tricresol and 3-methyl-5-ethyl phenol from a tricresol mixture. According to the method for refining the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol from the tricresol mixture, the tricresol mixture is rectified to obtain the mixed tricresol, the mixed tricresol and the isobutene are subjected to the tert-butylation reaction under the action of the catalyst, and due to the fact that the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol do not react with the isobutene, the 2, 3, 5-tricresol and the 3-methyl-5-ethyl phenol are not reacted with the isobutene. The method comprises the following steps: taking 2, 3, 5-trimethylphenol as a raw material, reacting other phenols with isobutene to generate corresponding tert-butyl phenol, boiling point of a tert-butyl product is obviously higher than that of 2, 3, 5-trimethylphenol and 3-methyl-5-ethyl phenol, performing rectification to obtain a 3-ethyl-5-cresol crude product and a 2, 3, 5-trimethylphenol crude product, and performing solvent refining and melt crystallization to obtain 3-ethyl-5-cresol of which the content is greater than or equal to 99% and 2, 3, 5-trimethylphenol of which the content is greater than or equal to 99%.

The invention relates to a bis-polyisobutylene alcohol amine compound and compositions thereof. The invention also is directed to a new process for making the bis-polyisobutylene alcohol amine by reacting a polyisobutylene epoxide with a polyamine, optionally in the presence of a catalyst, a protic solvent initiator and / or a diluent. In addition, the invention further relates to the many uses of the bis-polyisobutylene alcohol amine including but not limited to its use in lubricants, surfactants, emulsifiers, resins, and the like.

A method of manufacturing a free-standing, sheet-type solid-state electrolyte is provided. The method includes: mixing a sulfide ion conductor-containing material and a non-polar or low-polar binder in a solvent to obtain a slurry composition; disposing the slurry composition onto a planar substrate; spreading the slurry composition on the substrate to obtain a film; calendering the film to densify the film; and subsequently drying the film under vacuum. The binder may be polyisobutylene and may be present in the slurry composition in an amount of up to 10 wt. %, optionally between 1 and 5 wt. %. The sulfide ion conductor-containing material may be a lithium argyrodite having the chemical formula Li6PS5X in which X is Cl, Br, or I. The solvent may be toluene or xylene. The film may have a thickness of between 10 and 200 μm.

The embodiment of the invention provides a method for separating various phenols from cresol containing 2, 6-xylenol, which utilizes the characteristics that 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and isobutene can only generate mono-tert-butylated phenol, m-cresol, p-cresol and o-ethyl phenol, and o-cresol and isobutene can generate di-tert-butylphenol, and contains 2, 6-xylenol, 2, 4-xylenol, 2, 5-xylenol and 2, 4-xylenol. According to the method, cresol containing 2, 6-xylenol is subjected to the steps of monoalkylation, rectification, dialkylation, rectification, dealkylation, rectification and the like to realize separation of various phenols, so that the problem that the quality of m-cresol and p-cresol is influenced by 2, 6-xylenol when cresol extracted from medium-low temperature phenol-containing coal tar is separated is solved.

The invention discloses a self-adhesive polymer modified asphalt composite root-resistant waterproof coiled material and a preparation method thereof, and relates to the field of waterproof coiled materials, the self-adhesive polymer modified asphalt composite root-resistant waterproof coiled material comprises an isolating membrane layer, a polymer modified asphalt layer, a tire base layer, a polymer modified asphalt layer and an isolating membrane layer which are sequentially arranged from top to bottom; the physical root resistance effect of the base layer and the chemical root resistance effect of the polymer modified asphalt layer synergistically improve the root resistance performance of the waterproof coiled material. The polymer modified asphalt layer is prepared from petroleum asphalt, aromatic hydrocarbon oil, SBS, modified styrene butadiene rubber, polyisobutene, modified microcapsules and other raw materials; the modified microcapsule is obtained by grafting nano montmorillonite, hindered phenol, thioether group and the like into a wall material urea-formaldehyde resin of an epoxy resin microcapsule, and the modified styrene-butadiene rubber is obtained by grafting DOPO and sorbate group into styrene-butadiene rubber through epoxidized emulsion polymerized styrene-butadiene rubber participating in a reaction. The waterproof coiled material disclosed by the invention has excellent self-repairing capability, flame retardance and antibacterial property, and is worthy of popularization.

The invention discloses a method for preparing tert-butyl ethylbenzene through alkylation of ethylbenzene and isobutene. In a reactor, a raw material containing ethylbenzene and isobutene is in contact with a catalyst for an alkylation reaction to obtain a product containing tert-butyl ethylbenzene, by changing the proportion of the shell ZSM-12 molecular sieve in the hydrogen-type Beta-coated ZSM-12 core-shell molecular sieve and combining high-temperature water vapor treatment, the obtained catalyst shows excellent catalytic performance in liquid-phase alkylation reaction of ethylbenzene and isobutene. The catalyst preparation process is simple to operate and easy for industrial production. The development of a p-tert-butyl ethylbenzene production technology is favorably promoted.

The invention provides a flame-retardant high-modulus polypropylene composite material and a preparation method thereof, and relates to the technical field of composites.The flame-retardant high-modulus polypropylene composite material comprises a matrix phase, and the matrix phase comprises, by weight, 50-60 parts of polypropylene, 30-40 parts of a phosphorus-nitrogen flame retardant, 3-5 parts of a compatilizer and 0.5-1.5 parts of a dispersing agent; wherein the matrix phase comprises the following components in parts by weight: 0.5 to 1.5 parts of a scratch-resistant agent and 0.1 to 0.5 part of an antioxidant, the dispersing agent is an imidized isobutylene-maleic anhydride copolymer, the compatilizer is a polystyrene-oxazoline graft polymer, and the matrix phase further comprises the following components in parts by weight: 0.5 to 1.5 parts of a scratch-resistant agent and 0.1 to 0.5 part of an antioxidant. The flame-retardant high-modulus polypropylene composite material disclosed by the invention can comprehensively improve the flame-retardant property and the scratch resistance of the flame-retardant high-modulus polypropylene composite material.

The invention provides medium-high molecular weight high-activity polyisobutene and a preparation method thereof, and the preparation method comprises the following steps: mixing hydrogen peroxide and a butyl rubber solution, and reacting for 0.5-20 hours at 20-80 DEG C under the catalytic action of a catalyst to obtain epoxidized butyl rubber; dissolving epoxidized butyl rubber to obtain an epoxidized butyl rubber solution; adding an oxidative cracking reagent into the epoxidized butyl rubber solution, and reacting at 0-80 DEG C for 0.5-20 hours to obtain a polyisobutylene solution; the medium-high molecular weight high-activity polyisobutene has the characteristics of high molecular weight, narrow distribution and higher end group activity, and can be applied to the application fields of traditional high-activity polyisobutene such as additives of lubricating oil, fuel oil, rubber and the like; and the product can be used as a sealing material, a waterproof water-retaining agent, a rubber and plastic modifier and the like, can meet wider application requirements, and has good industrial application value.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention discloses a catalyst for an n-butene isomerization reaction and a preparation method thereof, and belongs to the technical field of catalysts. The preparation method comprises the following steps: mixing a silicon source, an aluminum source, tetrapropylammonium hydroxide and water, adding boric acid, and crystallizing to obtain a seed crystal; the method comprises the following steps: mixing a silicon source, an aluminum source, pyridine and water, adding a seed crystal and ammonium fluoride, and crystallizing to obtain a core-shell type molecular sieve; adding the core-shell type molecular sieve into the bimetallic complex solution for dipping to obtain a metal-loaded type molecular sieve; adding the metal-loaded molecular sieve into a triethyl phosphine ethanol solution for treatment to obtain a phosphorus-modified molecular sieve; uniformly mixing the phosphorus-modified molecular sieve, pseudo-boehmite, sesbania powder and water, kneading, performing extrusion molding, drying and calcining to obtain the catalyst. The catalyst prepared by the invention is used for n-butene isomerization reaction, and has excellent catalytic activity and isobutene selectivity.

The invention belongs to the field of functional composite materials, and particularly relates to low-viscosity and high-dispersity aluminum oxide slurry and a preparation method thereof.The low-viscosity and high-dispersity aluminum oxide slurry is prepared from a newly-designed phosphono-carboxyl block copolymer and biquaternary ammonium salt polyether silane as composite modifiers; and efficient anchoring and stable dispersion of the surfaces of alumina particles are realized through the synergistic effect of molecular structures. The phosphono-carboxyl block copolymer is prepared through controllable polymerization and deprotection reaction, and strong chemical bonding is formed between a phosphono group and the surface of aluminum oxide; the biquaternary ammonium salt polyether silane is subjected to click chemical synthesis, and electrostatic adsorption of quaternary ammonium salt and the steric hindrance effect of a polyether chain are combined. When the slurry is prepared, the two modifiers are sequentially added into water, the aluminum oxide powder is added after the pH value is adjusted, finally, the isobutylene maleic anhydride copolymer and the defoaming agent are introduced, and the slurry is obtained through vacuum defoaming and filtering. The slurry prepared by the method has the characteristics of high solid content, low viscosity and good dispersion stability.

A high-thermal-conductivity phase change sheet and a preparation method therefor. The high-thermal-conductivity phase change sheet is prepared from the following raw materials in parts by mass: 3-5 parts of a resin, 80-100 parts of a thermally conductive filler, 0.1-1 part of a treating agent, 0.1-1 part of an antioxidant, and 1-2 parts of a phase change material, wherein the resin is low-molecular-weight polyisobutylene, the thermally conductive filler comprises aluminum powder of 10 μm, aluminum powder of 2 μm and zinc oxide of 0.2 μm, and heat treatment and vacuumizing operation are involved in the preparation process.

The invention belongs to the technical field of molecular sieve catalysts, and discloses a catalyst for preparing isobutene through acetone conversion and a preparation method and application thereof.The preparation method comprises the steps that firstly, an HBeta molecular sieve is treated with concentrated nitric acid to prepare a dealuminated Beta molecular sieve; then loading the hafnium oxychloride octahydrate in the dealuminated Beta molecular sieve by an impregnation method; putting the obtained sample into a tetraethylammonium hydroxide solution, and fully stirring; and drying, centrifuging, washing to be neutral, drying, and roasting to obtain the Hf / Beta catalyst. The catalyst shows excellent catalytic activity and selectivity in the reaction of preparing isobutene through acetone conversion, is good in stability, and can obtain high-efficiency isobutene yield; the catalyst carrier and the metal precursor salt are cheap and easy to obtain, and the preparation process is simple; therefore, a new effective way is provided for production of isobutene, and the situation that isobutene mainly depends on traditional energy at present is effectively relieved.

The invention discloses a super-retarding type polycarboxylic acid water reducing agent and a preparation method and application thereof, and belongs to the field of concrete water reducing agents. The preparation method comprises the following steps: taking acrylic acid AA, isobutenol polyoxyethylene ether HPEG and hydroxyethyl acrylate HEA as monomers, taking mercaptopropionic acid MPA as a chain transfer agent, taking hydrogen peroxide H2O2 and L-ascorbic acid Vc, and mixing in proportion to serve as an initiator; preparing a first and second monomer mixed solution; adding bottom water into the reaction kettle, and carrying out stepwise polymerization reaction; and cooling the reaction liquid, adjusting the pH value, filtering, and discharging to obtain the product. According to the invention, an ester functional monomer hydroxyethyl acrylate HEA is introduced, and a step-by-step polymerization technology is adopted to control the dispersion process of water reducing agent molecules on cement particles, so that the water reducing agent molecules continuously disperse the cement particles within a certain period of time; the problem that the slump loss is too fast due to long-time and long-distance transportation of concrete or transportation in high-temperature weather is effectively relieved.

The invention relates to the technical field of fuel additives, in particular to a fuel additive as well as a preparation method and application thereof. Comprising the following components in parts by weight: 60 to 220 parts of bis-polyether amine, 10 to 20 parts of polyisobutene amine, 5 to 15 parts of polyether polyol, 5 to 30 parts of alkyl amine alcohol, 0.5 to 20 parts of polybasic fatty acid ester, 0.5 to 20 parts of alkyl acid ester, 10 to 30 parts of a catalyst, 2 to 7 parts of an antioxidant, 5 to 10 parts of a corrosion inhibitor and 10 to 50 parts of carrier oil. A small amount of the fuel additive is mixed with gasoline or diesel oil, and through bis-polyether amine and polyisobutene amine, combustion of fuel oil in a combustion chamber of an internal combustion engine is improved, more complete combustion of the gasoline or the diesel oil is promoted, the combustion efficiency of the fuel oil is enhanced, the oil consumption is reduced, and the economical efficiency of the fuel oil is improved; and air pollution caused by emission of hydrocarbon or combustion intermediate products is reduced.

The invention relates to a membrane separation method and device for separating 1, 3-butadiene from a C4 hydrocarbon mixture. According to the membrane separation method, a C4 hydrocarbon mixture is used as a raw material and is separated through an MOF membrane, and 1, 3-butadiene is obtained on the permeation side of the membrane; the C4 hydrocarbon mixture comprises 1, 3-butadiene, and further comprises one or a combination of more selected from the group consisting of n-butene, isobutene, n-butane, isobutane, cis-2-butene and trans-2-butene; and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90, and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90. The separation is carried out in an MOF membrane separation device, the MOF membrane separation device comprises an MOF membrane separator, and the MOF membrane separator comprises an MOF membrane assembly and the MOF membrane. According to the method, a membrane separation technology is adopted, so that high-purity 1, 3-butadiene can be efficiently obtained in a manner of increasing the productivity.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The invention provides a polypropylene composite material. The polypropylene composite material comprises the following components in parts by weight: 40-80 parts of copolymerized PP (polypropylene), 5-25 parts of POE (polyolefin elastomer), 5-25 parts of polyisobutene and 10-30 parts of filler, the number-average molecular weight of the polyisobutene is greater than 600. The POE elastomer, the polyisobutene and the filler are introduced into the copolymerized PP, so that the polypropylene composite material with low sink mark characteristic and good mechanical property can be obtained.

A gasoline modifier, a preparation method therefor and a use thereof, and a clean and environmentally friendly gasoline containing same. By volume, the gasoline modifier comprises 10-30 parts of No. 3 or No. 5 white oil, 5-50 parts of a gasoline detergent synergist and 40-85 parts of isooctyl alcohol; the gasoline detergent synergist comprises a stock liquid and a diluent liquid; the stock liquid is a liquid substance formed by mixing 2-ethylhexyl phosphate and etidronic acid in a weight ratio of 1.8-3:1 and heating to perform an esterification reaction; and / or the stock liquid comprises 2-ethylhexanol, phosphite ester, 2-ethylhexyl acetate, polyisobutylene succinic anhydride and ethylhexyl phosphate; the diluent liquid is formed by mixing formaldehyde having a content greater than 99% with oligomeric water clusters in a weight ratio of 1:4-3:7; and the weight percentage of the stock solution in the gasoline detergent synergist is 0.8%-1.3% white oil. The gasoline modifier is a pure petroleum product. When added to gasoline, it can change the physical properties of the gasoline, and achieve the effects of increasing efficiency, saving fuel, removing carbon and reducing emissions.

The invention relates to the technical field of waterproof coiled materials, and particularly discloses a self-adhesive modified rubber asphalt waterproof coiled material and a preparation method thereof. The self-adhesive modified rubber asphalt waterproof coiled material comprises a surface isolating membrane, an asphalt layer, a reinforcing layer and a bottom surface isolating membrane from bottom to top, and the asphalt layer comprises the following raw materials: regenerated rubber modified asphalt, SEBS, terpene resin, polyisobutene amine, an antioxidant and an ultraviolet light absorber; the surface isolating membrane and the bottom isolating membrane are selected from sand surface isolating membranes, and the thickness of the surface isolating membrane and the bottom isolating membrane is 0.8-1.2 mm; and the reinforcing layer is a long-fiber polyester base reinforcing layer. The tensile strength of the self-adhesive modified rubber asphalt waterproof coiled material is 4.5-5.6 N / mm < 2 >, the self-adhesive modified rubber asphalt waterproof coiled material does not flow or drip at 70 DEG C and does not crack at-30 DEG C, the self-adhesive modified rubber asphalt waterproof coiled material has high use performance, the joint peel strength of the waterproof coiled material is 3.2-4.2 N / mm, the holding power is greater than 15 min, and the self-adhesive property of the waterproof coiled material is improved.

The invention discloses a preparation method of tert-butyl alcohol, and relates to the technical field of chemical raw materials. The method comprises the following steps: pretreatment of a catalyst: activating the solid acid catalyst to remove possible impurities and moisture so as to improve the activity and selectivity of the catalyst; hydration reaction: adding the pretreated catalyst into a reaction tower, introducing isobutene gas and water, stirring, and carrying out hydration reaction under the action of the catalyst; and separation and purification: the reacted mixture enters a separator, tert-butyl alcohol and the raw material are separated out, the unreacted raw material isobutene is circulated back to the reaction kettle to continue to participate in the reaction, the separated crude tert-butyl alcohol product enters a rectifying tower to be rectified and purified, and the tert-butyl alcohol product is obtained. Compared with a traditional liquid acid catalyst, the solid acid catalyst has the advantages of being easy to separate, capable of being repeatedly used, small in corrosion to equipment and the like.

The invention relates to a butyl hot melt adhesive, which is prepared from the following raw materials in parts by weight: 10 to 30 parts of butyl rubber, 5 to 15 parts of polyisobutene, 25 to 50 parts of amorphous polyolefin, 10 to 30 parts of organic silicon modified polymer, 0.1 to 1 part of lubricant, 0.1 to 1 part of antioxidant, 1 to 30 parts of modified filler and 1 to 20 parts of carbon black, the organic silicon modified polymer comprises a polyurethane polymer terminated by a silane coupling agent. The butyl hot melt adhesive provided by the invention has the characteristics of difficulty in flowing after being heated, good high-temperature stability and excellent bonding performance, can be used for bonding and sealing a car lamp, and can ensure that the car lamp is stable in structure in a high-temperature environment, so that the car lamp can still work normally in hot weather or when the car lamp is close to high-temperature parts such as an engine, and the service life of the car lamp is prolonged.

The invention relates to the field of sealing materials, in particular to a butyl rubber sealing material and a preparation method thereof. Comprising the following components in parts by weight: 50-70 parts of butyl rubber, 30-50 parts of a brominated isobutylene-p-methylstyrene copolymer, 30-50 parts of carbon black, 8-12 parts of an alkyl phenolic resin vulcanizing agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of an anti-aging agent and 5-10 parts of a plasticizer. The butyl rubber provides ideal air tightness and heat aging resistance, bromine atoms are introduced into the brominated isobutylene-p-methylstyrene copolymer, co-vulcanization with the butyl rubber is achieved, it is ensured that a uniform and stable co-crosslinking network can be formed between the two rubber molecules, and the service life of the rubber is prolonged. The alkyl phenolic resin vulcanizing agent can form a C-C bond with high bond energy with two rubber molecules, so that the thermal aging resistance of the butyl rubber sealing material is effectively improved, the compression set is reduced, and the butyl rubber sealing material with excellent performance is prepared.

The present invention relates to a composition in the form of a water-in-oil emulsion, including, (a) one or more esters formed from at least one fatty acid having more than 13 carbon atoms; (b) a polymer component including one or more polymerized (iso)butenes; (c) at least about 3% by weight of one or more carbohydrate fatty acid ester emulsifiers; (d) one or more fillers comprising hydrophobic silica; and (e) one or more pigments. The composition is substantially free of silicones & alkanes.

The invention discloses a hydrolysis-resistant reinforced high-temperature nylon composite material and a preparation method thereof, and relates to the technical field of nylon composite materials. The hydrolysis-resistant reinforced high-temperature nylon composite material is prepared from the following components in parts by mass: 50-85 parts of a nylon resin matrix, 10-40 parts of a reinforcing material, 4-8 parts of polyisobutene, 0.5-8 parts of a hydrolysis-resistant agent, 0.1-2 parts of an antioxidant and 0.2-3 parts of a lubricant. Through the synergistic effect of the antioxidant and the hydrolysis-resistant agent, a hydrolysis reaction chain is effectively blocked, and performance degradation of the material in a high-temperature and high-humidity environment is greatly delayed. The compatibility of the material and a resin matrix is improved, and the interface bonding force is enhanced by combining a gradient cooling process, so that the material still keeps high mechanical strength retention rate under extreme working conditions.

The present invention relates to the technical field of skin care products, and specifically discloses a soothing smoothie cream containing Centella asiatica extract and a preparation method thereof. The soothing smoothie cream containing Centella asiatica extract includes phase A, phase B, phase C, and phase D, wherein phase A is a compound of solvent, glycerol, butylene glycol, erythritol, allantoin, sodium carbomer, p-hydroxyacetophenone, polypropylene (ester) class / C10-20 alkyl acrylate cross-linked polymer; phase B is a compound of hydrogenated polyisobutene, caprylic / capric triglyceride, and polyglycerol-3 methyl glucose distearate; phase C is arginine; phase D is a compound of 1,2 hexanediol, dipotassium glycyrrhizate, saccharide isomers, Centella asiatica extract, white iris root extract, centella roxburghii extract, and white oak bark extract. The present invention has the advantage of further improving the soothing effect of skin care products.

The invention discloses a catalyst for synthesizing 3-methyl-3-butene-1-alcohol as well as preparation and application of the catalyst. The preparation method of the catalyst comprises the following steps: (S1) mixing acrylic acid, acrylate, a dispersing agent, a flatting agent and a light curing agent to obtain a photosensitive resin mixed solution; (S2) mixing first powder with the photosensitive resin mixed solution obtained in the step (S1), sequentially adding a suspending agent, a soaking and washing agent and second powder, standing, and then adding an anti-sticking agent and a soaking and washing agent to obtain printing slurry; and (S3) loading the printing slurry obtained in the step (S2) into a liquid carrying device, carrying out 3D printing according to a set program, and carrying out post-treatment to obtain the catalyst with a three-dimensional cuboid grid skeleton structure. The catalyst is high in mechanical strength and long in service life, and is used for the process of generating 3-methyl-3-butene-1-alcohol from isobutene and formaldehyde, and the formaldehyde conversion rate and the 3-methyl-3-butene-1-alcohol selectivity are greatly improved.

The invention discloses a method for preparing a large-size ceramic part by utilizing 3D printing, which comprises the following steps: weighing ceramic powder, a dispersing agent, an isobutylene-maleic anhydride copolymer, acrylamide and N, N-dimethylformamide; the preparation method comprises the following steps: mixing and ball-milling N, N, N ', N'-tetramethylethylenediamine and ammonium persulfate into ceramic slurry to obtain ceramic slurry, adding N, N, N ', N'-tetramethylethylenediamine and ammonium persulfate into the ceramic slurry, continuously ball-milling, defoaming the obtained slurry, pouring the slurry into a charging barrel, sealing and baking to obtain printing feed, performing screw extrusion printing by adopting direct-writing 3D printing equipment to obtain a wet blank, and performing secondary gelling and drying on the wet blank to obtain the 3D printing material. And sintering the green body to obtain a ceramic blank, and carrying out precision machining and polishing to obtain the large-size ceramic part. According to the method, the printing working stroke is large, the printing feeding binder content is low, the solid content is high, cracking is not prone to occurring in the drying and sintering process, and rapid and safe preparation of large-size ceramic parts can be achieved.

A process for converting whole crudes and other heavy hydrocarbon streams to produce ethylene. The process includes feeding a hydroprocessed medium boiling fraction, a hydroprocessed residue fraction, or both, and a light boiling fraction to a steam cracker and recovering a light fraction. The light fraction is fed to a first separator and recovering a C1-C3 stream and a mixed C4 and C4+ stream, comprising isoolefins, olefins, and dienes and feeding the mixed C4 and C4+ stream to a second separator and recovering a mixed C4 stream comprising isoolefins, olefins, and a C4+ stream. A portion of the mixed C4 stream is dimerized in a dimerization unit to produce a dimerized product stream, hydrogenated in a total hydrogenation system, producing a hydrogenated dimer product stream, and cracking the hydrogenated dimer product stream in a thermal cracking reactor system, producing one or more of hydrogen, methane, ethylene, propylene, n-butenes, and isobutene.