天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Catalyst and Auxiliary

The catalyst can change the reaction rate in the chemical reaction, and the composition and the quality of the catalyst can be kept constant after the reaction. The catalyst that accelerates the reaction is called the positive catalyst, slows down called Negative Catalyst or slow agent. It said catalyst is a positive catalyst for the general correction. This kind of catalyst in the industry, especially the organic chemical industry used more, and has great significance, Such as sulfuric acid prepared by contacting, ammonia, hydrolysis of the ester and polysaccharide, Oil Hydrogenation, etc. Commonly used catalysts are mainly metal, metal oxide and inorganic acid. If the catalyst is solid, the substance of the reaction is gas, to form a multi-phase catalytic reaction, this catalyst, sometimes called catalyst or contact agent. The catalyst is generally selective, it can only make a reaction or a certain type of reaction to speed up. But some reaction can be used for a variety of catalysts, such as the hydrogenation reaction can often be platinum, palladium, nickel, should be carefully chosen. In the catalytic reaction, the catalyst is often added cocatalyst known to enhance catalytic action of the catalyst. For example, iron is a catalyst in ammonia industry, adding a small amount of potassium and aluminum can enhance the catalytic effect of iron. The composition and weight of the catalyst and cocatalyst cannot change before and after the reaction. All of the above are inorganic catalysts. The enzyme is a protein, is very important organic catalyst.

There are many kinds of catalyst, catalyst and reaction system according to the phase of the classification, there are two types of homogeneous and heterogeneous catalysts. Heterogeneous catalysts most widely used, there are 3 kinds of gas, liquid and solid state, the variety and application of solid catalyst. The solid catalyst, which is made of metal (nickel, platinum, palladium, chromium, cobalt, titanium, vanadium, etc.) or metal oxide (copper oxide, vanadium pentoxide, lead oxide), is dispersed and deposited on the carrier in order to obtain a good dispersion effect and increase the specific surface area. The catalyst requires reliable activity, stability, selectivity, long working life, not easy to poisoning and over-burning, easy to regenerate. In order to improve the catalytic efficiency, the pure metal catalysts are made into alloy catalysts (such as nickel aluminium alloy) and composite catalysts (ZieglerNatta). The composite catalyst is composed of main catalyst and co-catalyst. In the new efficient catalysts also add other components. The production and development of high efficiency catalyst have promoted the development of polymer materials, and produced much polymer function and structure material ,which is new generation of high performance and high added value.

With the extensive application of catalyst and a number of new catalysts, we can make a lot of new chemical reactions to achieve industrialization, in order to provide an increasing number of chemical products; also can make some of the original chemical reaction conditions have been improved, in order to improve the production efficiency and product quality, make full use of resources. The important subject in the field of modern chemistry and chemical research is to select and develop more and better catalyst for the new generation. But the role of a catalyst is not beneficial to humans, such as combustion products of supersonic jet fuel as a catalyst can cause the stratosphere (10 to 50 km altitude) decomposition of ozone in the atmosphere, to the sun's ultraviolet absorption decreased, resulting in some areas of skin cancer patients increased. Is developing a new supersonic jet fuel, its combustion products will not become a catalyst,which will cause the ozone decomposition catalyst in the stratosphere.

Additives are added in the industrial and agricultural production, especially in the chemical production of some of the auxiliary chemicals, its role is to improve the production process, improve product quality and yield, or to give the product a unique application performance.

Additive are large class of important chemical in the production of auxiliary raw materials, they can give a special performance to product, improve use of finished products; and can accelerate the chemical reaction rate, improve product yield; they can save raw materials, improve processing efficiency. Additives are widely used in the chemical industry, especially organic synthesis, synthetic material processing and petroleum refining, pesticide, medicine, dye, paint and other industrial sectors. Additives can be divided into synthesized additives and processing additives. Synthetic additives are used in monomer synthesis and polymerization of a variety of auxiliary agents in resin, fiber, rubber, etc. They include catalysts, initiators, solvents, dispersants, emulsifiers, polymerization inhibitors, regulators, termination agents, etc. Processing aid refers to the auxiliary chemicals used in the manufacture of raw rubber, plastics processing, chemical fiber spinning and spinning process, including plasticizers, heat stabilizers, antioxidants, light stabilizers , flame retardants, blowing agents, lubricants, mold release agents, curing agents, accelerators, softeners, anti-scorching agents, surfactants, oils, fillers, etc. In these additives, many of them are dangerous chemicals, Such as benzoyl peroxide, azobisisobutyronitrile, hydrogen peroxide - ferrous blue, alkyl aluminum chloride, titanium and other initiators, catalysts are inflammable and explosive materials, should be required to "chemical Dangerous Goods Safety Management Regulations", for storage, transportation, operation and use.

Click on the specific product, view the latest prices of the products, information, serving information
Structure Chemical Name CAS MF
PHENOL-FORMALDEHYDE RESIN PHENOL-FORMALDEHYDE RESIN 9003-35-4 (C6H6O.CH2O)x
Trimethylolpropane triglycidyl ether Trimethylolpropane triglycidyl ether 30499-70-8 C9H19ClO4
AMBERLITE XAD-16 AMBERLITE XAD-16 104219-63-8
C.I. 482200 C.I. 482200 38775-22-3 C28H22O6S2
DIETHYLENE GLYCOL MONO-METHACRYLATE DIETHYLENE GLYCOL MONO-METHACRYLATE 2351-43-1 C8H14O4
CYASORB UV-3638 CYASORB UV-3638 18600-59-4 C22H12N2O4
Antioxidant 1726 Antioxidant 1726 110675-26-8 C33H60OS2
Flame retardants Flame retardants
Polyethylene Terephthalate Polyethylene Terephthalate 25038-59-9 C10H12O6
Poly(tetrahydrofuran) Poly(tetrahydrofuran) 25190-06-1 (C4H8O)nH2O
Polyvinylidene fluoride Polyvinylidene fluoride 24937-79-9 C2H2F2
UV absorber-928 UV absorber-928 73936-91-1 C29H35N3O
AMBERLYST(R) 15 AMBERLYST(R) 15 39389-20-3 C18H18O3S
BIS[2-(2-BUTOXYETHOXY)ETHYL] ADIPATE BIS[2-(2-BUTOXYETHOXY)ETHYL] ADIPATE 141-17-3 C22H42O8
Diisononyl adipate Diisononyl adipate 33703-08-1 C24H46O4
Aromatics solvent oil Aromatics solvent oil C6H6-C4H11
Glucurulactone CP95 Glucurulactone CP95
N,N'-Bis(methylphenyl)-1,4-benzenediamine N,N'-Bis(methylphenyl)-1,4-benzenediamine 27417-40-9 C20H20N2
Fluorescent Brightener Pf Fluorescent Brightener Pf C18H14O2N2
POLY(ISOBUTYL METHACRYLATE) POLY(ISOBUTYL METHACRYLATE) 9011-15-8 C8H14O2
Solvent oil No.200 Solvent oil No.200
NYLON 6 NYLON 6 25038-54-4 C18H33N3O3X2
DBE DIBASIC ESTER DBE DIBASIC ESTER 95481-62-2 C21H36O12
Poly(1,2-dihydro-2,2,4-trimethylquinoline) Poly(1,2-dihydro-2,2,4-trimethylquinoline) 26780-96-1 C12H15N
Poly(propylene glycol) bis(2-aminopropyl ether) Poly(propylene glycol) bis(2-aminopropyl ether) 9046-10-0 CH3CH(NH2)CH2[OCH2CH(CH3)]nNH2
Propanoic acid, 2-hydroxy-, homopolymer Propanoic acid, 2-hydroxy-, homopolymer 26100-51-6 (C3H6O3)x
Polypropylenglycol diglycidyl ether Polypropylenglycol diglycidyl ether 26142-30-3 (C3H6O)n.C6H10O3
POLY(VINYL FORMAL) POLY(VINYL FORMAL) 9003-33-2 C5H8O2
N,N'-Propane-1,3-diylbis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide] N,N'-Propane-1,3-diylbis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide] 69851-61-2 C37H58N2O4
N-(2-Ethoxyphenyl)-N'-(4-ethylphenyl)-ethlyene diamide N-(2-Ethoxyphenyl)-N'-(4-ethylphenyl)-ethlyene diamide 23949-66-8 C18H20N2O3
Fluorescent Brightener 33 Fluorescent Brightener 33 61902-19-0
Lubricant base Lubricant base 8002-05-9
Sulfur powder Sulfur powder S8
POLY(ETHYLENE GLYCOL) METHYL ETHER ACRYLATE POLY(ETHYLENE GLYCOL) METHYL ETHER ACRYLATE 32171-39-4 C6H10O3
POLY(ETHYLENE GLYCOL) BIS(CARBOXYMETHYL) ETHER POLY(ETHYLENE GLYCOL) BIS(CARBOXYMETHYL) ETHER 39927-08-7 C4H10O5
HEXAETHYLENE GLYCOL MONOHEXADECYL ETHER HEXAETHYLENE GLYCOL MONOHEXADECYL ETHER 5168-91-2 C28H58O7
antioxidant AO80 antioxidant AO80 90498-90-1 C43H64O10
Fluorescent Brightener 210 Fluorescent Brightener 210 28950-61-0 C40H36N12Na4O14S4
Coupling agent Coupling agent
Chlorinated Paraffin-70 Chlorinated Paraffin-70
1,3-Dioxan-2-one homopolymer 1,3-Dioxan-2-one homopolymer 31852-84-3 C4H6O3
PETROLEUM ETHER PETROLEUM ETHER 64742-89-8
POLY(2-HYDROXYACETIC ACID) POLY(2-HYDROXYACETIC ACID) 26009-03-0 C6H6O5X2
DICYCLOHEXYL PHTHALATE-3,4,5,6-D4 DICYCLOHEXYL PHTHALATE-3,4,5,6-D4 358731-25-6 C20H22D4O4
Polymaleic acid Polymaleic acid 26099-09-2 C4H4O4
polyethyleneimine polyethyleneimine 25987-06-8 C4H13N3
Diethylene glycol diglycidyl ether Diethylene glycol diglycidyl ether 39443-66-8 C10H18O5
Glyceryl monooleate Glyceryl monooleate 25496-72-4 C21H40O4
Fluorescent Brightener 357 Fluorescent Brightener 357 41098-56-0 C40H45N12NaO18S6
Fluorescent brightener  185 Fluorescent brightener 185 12224-41-8 C18H10N2O2S
Diundecyl phthalate Diundecyl phthalate 3648-20-2 C30H50O4
POLYETHYLENE GLYCOL-BOUND RUTHENIUM CARBENE COMPLEX POLYETHYLENE GLYCOL-BOUND RUTHENIUM CARBENE COMPLEX 321922-26-3 C36H57Cl2O6PRu
MONO-METHYL POLYETHYLENE GLYCOL 5'000 SUCCINATE N-SUCCINIMIDYL ESTER MONO-METHYL POLYETHYLENE GLYCOL 5'000 SUCCINATE N-SUCCINIMIDYL ESTER 78274-32-5
AMBERLITE(R) IRA-400 (CL) AMBERLITE(R) IRA-400 (CL) 60177-39-1 C22H28ClN
Fluorescent Brightener Fluorescent Brightener
Poly(4-chlorostyrene) Poly(4-chlorostyrene) 24991-47-7 C8H7Cl
Fluorescent brightener CBS Fluorescent brightener CBS C28H22O6S2
POLYETHYLENEGLYCOL 600 MONOOCTYL ETHER POLYETHYLENEGLYCOL 600 MONOOCTYL ETHER 27252-75-1 (C2H4O)nC8H18O
MONO-METHYL POLYETHYLENE GLYCOL 5'000 2-MALEIMIDOETHYL ETHER MONO-METHYL POLYETHYLENE GLYCOL 5'000 2-MALEIMIDOETHYL ETHER 99126-64-4 (C2H4O)n.C7H9NO3
POLY(ALLYLAMINE) POLY(ALLYLAMINE) 30551-89-4 C3H7N
Poly(dicyclopentadiene-co-p-cresol) Poly(dicyclopentadiene-co-p-cresol) 68610-51-5 C10H12.C7H8O.C4H8
Ethylene-vinyl acetate copolymer Ethylene-vinyl acetate copolymer 24937-78-8 C18H30O6X2
POLY(4-VINYLPYRIDINE) POLY(4-VINYLPYRIDINE) 25232-41-1 C7H7N
POLY(VINYL CHLORIDE), CARBOXYLATED POLY(VINYL CHLORIDE), CARBOXYLATED 25702-80-1 C5H7ClO2
Fluorescent Brightener 9 Fluorescent Brightener 9 133-66-4 C44H34N12Na2O6S2
HEAVY CUT RESIDUE OIL HEAVY CUT RESIDUE OIL
1500,1712,1808 SBR 1500,1712, 1808 1500,1712,1808 SBR 1500,1712, 1808
Fluorescent Whitening Agent VBL Fluorescent Whitening Agent VBL
Fluorescent Brightener BC Fluorescent Brightener BC C32H26N12Na2O6S2
Polyglyceryl fatty ester Polyglyceryl fatty ester
2-BUTOXYETHYL OLEATE 2-BUTOXYETHYL OLEATE 109-39-7 C24H46O3
Hexamethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] Hexamethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] 35074-77-2 C40H62O6
DI-N-HEXYL AZELATE DI-N-HEXYL AZELATE 109-31-9 C21H40O4
Chimassorb 119 Chimassorb 119 106990-43-6 C132H250N32
POLY(VINYL METHYL ETHER) POLY(VINYL METHYL ETHER) 9003-09-2 C9H18O3X2
1-PROPOXY-2-PROPANOL 1-PROPOXY-2-PROPANOL 1569-01-3 C6H14O2
POLY(2-ETHYL-2-OXAZOLINE) POLY(2-ETHYL-2-OXAZOLINE) 25805-17-8 C5H9NO
DIISOHEPTYL PHTHALATE DIISOHEPTYL PHTHALATE 71888-89-6 C22H34O4
AMBERLITE IRP-69 AMBERLITE IRP-69 55464-99-8
DIISODECYL GLUTARATE DIISODECYL GLUTARATE 29733-18-4 C25H48O4
Fluorescent Brightener 121 Fluorescent Brightener 121 2744-49-2 C15H14ClN3O2S
Fluorescent Brightener 119 Fluorescent Brightener 119 12270-52-9
sodium 4-[3-(4-chlorophenyl)-4,5-dihydro-5-phenyl-1H-pyrazol-1-yl]benzenesulphonate sodium 4-[3-(4-chlorophenyl)-4,5-dihydro-5-phenyl-1H-pyrazol-1-yl]benzenesulphonate 40691-09-6 C21H18ClN2NaO3S
Naphtha (petroleum), light alkylate Naphtha (petroleum), light alkylate 64741-66-8 unspecified
Fluorescent Whitening Agent EBF Fluorescent Whitening Agent EBF
Fluorescent Brightener BBU Fluorescent Brightener BBU
Ultraviolet absorbent Ultraviolet absorbent
POLYSTYRENE SULFONIC ACID POLYSTYRENE SULFONIC ACID 28210-41-5 C8H8O3S
AMBERLITE(R) XAD-4 AMBERLITE(R) XAD-4 37380-42-0
Polyquaternium-10 Polyquaternium-10 68610-92-4 (C2H4O)n.C6H16NO2.xCl.xUnspecified
Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite Bis(2,6-di-ter-butyl-4-methylphenyl)pentaerythritol-diphosphite 80693-00-1 C35H54O6P2
Fluorescent Brightener 87 Fluorescent Brightener 87 12768-91-1 C40H40N12O16S4.4Na
Fluorescent Brightener 113 Fluorescent Brightener 113 12768-92-2 C40H42N12O10S2.2Na
Distillates, wood-tar Distillates, wood-tar 91995-59-4
MBHA RESIN HCL MBHA RESIN HCL C15H18ClN
O,O'-BIS(3-AMINOPROPYL)POLYETHYLENE GLYCOL 1'500 O,O'-BIS(3-AMINOPROPYL)POLYETHYLENE GLYCOL 1'500 34901-14-9 NH2(CH2)3(OCH2CH2)nO(CH2)3NH2
Polyquaternium-7 Polyquaternium-7 26590-05-6 C11H21ClN2O
Methoxypolyethylene glycol amine Methoxypolyethylene glycol amine 80506-64-5 C5H13NO2
POLYETHYLENE GLYCOL 5'000 MONOMETHYL POLYETHYLENE GLYCOL 5'000 MONOMETHYL 175172-61-9 C4H10O4S
Allyloxypolyethyleneglycol Allyloxypolyethyleneglycol 27274-31-3 C5H10O2
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.