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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.

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Structure Chemical Name CAS MF
(η(5):η(1)-C13H8SiMe2N(t)Bu)ZrCl2 (η(5):η(1)-C13H8SiMe2N(t)Bu)ZrCl2 145519-50-2 C19H23Cl2NSiZr
Vinyl resin Vinyl resin
Alkylphenol resin SW-109 Alkylphenol resin SW-109
Poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine) Poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine) 42751-79-1 C7H20ClN3O
zirconium carbide zirconium carbide 12020-14-3 ErFeH2O
	1,3-Dimethyl-1,3-diphenylurea 1,3-Dimethyl-1,3-diphenylurea 611-92-7 C15H16N2O
Chloro[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene]gold(I) Chloro[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene]gold(I) 852445-81-9 C21H24AuClN2
Di-chlorobis[(1,2,3-)-1-phenyl-2-propenyl]dipalladium(II) Di-chlorobis[(1,2,3-)-1-phenyl-2-propenyl]dipalladium(II) 12131-44-1 C18H12Cl2Pd2
2-Propenoic acid, polymer with 1,3-butadiene and 2-propenenitrile 2-Propenoic acid, polymer with 1,3-butadiene and 2-propenenitrile 25265-19-4 C10H13NO2
Alcohols, C12-14, ethoxylated propoxylated Alcohols, C12-14, ethoxylated propoxylated 68439-51-0 C34H70O10
[DSPE-PEG-MAL] α-Maleimidyl-ω-distearoyl-sn-glycero-3-phosphoethanolamino poly(ethylene glycol) [DSPE-PEG-MAL] α-Maleimidyl-ω-distearoyl-sn-glycero-3-phosphoethanolamino poly(ethylene glycol)
Palladium, [μ-[1,1'-(1,4-butanediyl)bis[1,1-bis(1,1-dimethylethyl)phosphine-κP]]]dichlorobis[(1,2,3-η)-1-phenyl-2-propen-1-yl]di- Palladium, [μ-[1,1'-(1,4-butanediyl)bis[1,1-bis(1,1-dimethylethyl)phosphine-κP]]]dichlorobis[(1,2,3-η)-1-phenyl-2-propen-1-yl]di- 2756973-32-5 C38H58Cl2P2Pd2
Teflon micropowder rubber and plastic Teflon micropowder rubber and plastic
PVM/MA PVM/MA 1644545-52-7 C14H13ClF6N6
BIS(2-METHYLALLYL)PALLADIUM CHLORIDE DIMER BIS(2-METHYLALLYL)PALLADIUM CHLORIDE DIMER 12081-18-4 C16H28Cl2Pd2
CARBOPOL ETD 2020 CARBOPOL ETD 2020 176429-87-1
DSPE-PEG-NHS DSPE-PEG-NHS 1445723-73-8 C49H89N2O15P
Anti-tear resin KS-60 Anti-tear resin KS-60
Poly(dimethylsiloxane-co-methylphenylsiloxane) Poly(dimethylsiloxane-co-methylphenylsiloxane) 63148-52-7 C21H24O3Si3X2
Silane-PEG-COOH Silane-PEG-COOH
DSPE PEG Biotin DSPE PEG Biotin 740794-01-8
Monostearin-PEG-COOH Monostearin-PEG-COOH
Brominated SBS Brominated SBS 1195978-93-8
4-Methylmorpholine N-oxide monohydrate 4-Methylmorpholine N-oxide monohydrate 70187-32-5 C5H11NO2
Tinuvin-1130 Tinuvin-1130 104810-47-1 C20H23N3O3
1,1,1-Tris(4-hydroxyphenyl)ethane 1,1,1-Tris(4-hydroxyphenyl)ethane 27955-94-8 C20H18O3
Bis(tert-butyldioxyisopropyl)benzene Bis(tert-butyldioxyisopropyl)benzene 25155-25-3 C20H34O4
2’,4’-Di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate 2’,4’-Di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate 4221-80-1 C29H42O3
SAS-PEG-SAS SAS-PEG-SAS
Boc-NH-PEG-Mal Boc-NH-PEG-Mal
FITC-PEG-N3 FITC-PEG-N3
8-ArmPEG-CHO 8-ArmPEG-CHO
ACA-PEG-SC ACA-PEG-SC
Benzyl-PEG11-OH Benzyl-PEG11-OH
DOPE-PEG-FA DOPE-PEG-FA
3-[2-(2-Iodoethoxy)-ethoxy]-propyne 3-[2-(2-Iodoethoxy)-ethoxy]-propyne 1234387-33-7 C7H11IO2
-ether-PEG5-amine -ether-PEG5-amine 2341841-01-6 C25H36ClN3O10
High Purity Ruthenium Powder High Purity Ruthenium Powder
Cy3.5-PEG-COOH Cy3.5-PEG-COOH
Boc-NH-PEG4-ACA Boc-NH-PEG4-ACA
4-ArmPEG-DTPA 4-ArmPEG-DTPA
BOC-NH-PEG-SS BOC-NH-PEG-SS
PCL(5K)-PEG-CHO PCL(5K)-PEG-CHO
Diethoxylsilane-PEG-Mal Diethoxylsilane-PEG-Mal
Alkyne-PEG-SVA Alkyne-PEG-SVA
Cy3-PEG-Mal Cy3-PEG-Mal
mPEG-NH-CHO mPEG-NH-CHO
NH2-PEG-PA NH2-PEG-PA
MTX-PEG-NH2 MTX-PEG-NH2
PAA(2K)-PEG-NH2 PAA(2K)-PEG-NH2
NH2-PEG-Mannose NH2-PEG-Mannose
SH-PEG7-NH2.HCl SH-PEG7-NH2.HCl
Anti-aging additive TMQ (RD) Anti-aging additive TMQ (RD)
Rubber Tackfier R-80 Rubber Tackfier R-80
O-(3-Carboxypropyl)-O'-[2-(3-MercaptopropionylaMino)ethyl]-polyethylene glycol Mw 5000 O-(3-Carboxypropyl)-O'-[2-(3-MercaptopropionylaMino)ethyl]-polyethylene glycol Mw 5000 1220112-75-3 (C2H4O)nC9H17NO4S
TAMRA-PEG4-alkyne TAMRA-PEG4-alkyne 1225057-68-0 C36H41N3O8
PTFE ultrafine powder PTFE ultrafine powder
Sintering agent Sintering agent
Methylamino-PEG3-azide Methylamino-PEG3-azide 1355197-57-7 C9H20N4O3
Zinc N-Ethyl-N-phenyldithiocarbamate Zinc N-Ethyl-N-phenyldithiocarbamate 14634-93-6 C18H20N2S4Zn
Polyaniline Polyaniline 25233-30-1 C6H7N
APA-1042 APA-1042 647030-43-1 C41H38Cl2Zr
Br-PEG-OH Br-PEG-OH
Silane-PEG-SH Silane-PEG-SH
4-ArmPEG-(3COOH-1NH2) 4-ArmPEG-(3COOH-1NH2)
Thalidomide-O-PEG4-amine Thalidomide-O-PEG4-amine 2401832-00-4 C23H31N3O9
Thalidomide-O-PEG4-Propargyl Thalidomide-O-PEG4-Propargyl 2098799-77-8 C24H28N2O9
Fmoc-Lys-PEG8-OH Fmoc-Lys-PEG8-OH
4-ArmPEG-(2OH-2COOH) 4-ArmPEG-(2OH-2COOH)
COOH-PEG-Tretinoin COOH-PEG-Tretinoin
Monoethoxylsilane-PEG-SC Monoethoxylsilane-PEG-SC
Alkyne-PEG-Silane Alkyne-PEG-Silane
DBCO-PEG-SVA DBCO-PEG-SVA
PLGA(5K)-PEG-SH PLGA(5K)-PEG-SH
8-ArmPEG-(7Arm-OCH3,1ARrm-SH) 8-ArmPEG-(7Arm-OCH3,1ARrm-SH)
NH2-PEG-Retinoic acid NH2-PEG-Retinoic acid
COOH-PEG-N+Me3 COOH-PEG-N+Me3
Palmitic acid-PEG-NH2 Palmitic acid-PEG-NH2
Poly(dipropyleneglycol)phenyl phosphite Poly(dipropyleneglycol)phenyl phosphite 80584-86-7 C102H134O31P8
tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate tetraethyl 2,2'-(1,4-phenylenedimethylidyne)bismalonate 6337-43-5 C22H26O8
m-PEG-Aminooxy m-PEG-Aminooxy
m-PEG-CH2COOH m-PEG-CH2COOH
Resin acids and Rosin acids, maleated, esters with glycerol Resin acids and Rosin acids, maleated, esters with glycerol 94581-16-5
Bis(2,26,6Tetramethylheptanedionato)palladium(II) Bis(2,26,6Tetramethylheptanedionato)palladium(II) 15214-66-1 C22H38O4Pd
Photoinitiator Photoinitiator
Platinum on activated carbon Platinum on activated carbon
Benzyl-PEG48-OH Benzyl-PEG48-OH
CLS-PEG-NH2 CLS-PEG-NH2
DOPE-PEG-SC DOPE-PEG-SC
FA-PEG-Alkyne FA-PEG-Alkyne
LNA-PEG-Mal LNA-PEG-Mal
mPEG-CH3 mPEG-CH3
mPEG-MTA mPEG-MTA
OH-PEG-COOH OH-PEG-COOH
PCL(12K)-PEG-Mal PCL(12K)-PEG-Mal
PLGA(2K)-PEG-Ph PLGA(2K)-PEG-Ph
PLGA(5K)-PEG-NH2 PLGA(5K)-PEG-NH2
Tr-PEG10-Benzyl Tr-PEG10-Benzyl
Pomalidomide-PEG3-CO2H Pomalidomide-PEG3-CO2H 2138440-82-9 C22H27N3O9
DBCO-PEG12-acid DBCO-PEG12-acid 2353410-00-9 (C2H4O)nC24H24N2O5
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