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Catalyst and Auxiliary

Antioxidants UV absorbers Antioxidant Polyethylene glycol derivatives Fluorescent brightener Plastic rubber chemicals polymer Precious Metal Catalysts Coupling Zeolite Flame retardants Petrochemical Fluor reagent
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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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Chemical Name:
Iodoacetyl-PEG-Mal
Chemical Name:
8-Arm PEG-SA
Structure:
Chemical Name:
DSPE-PEG-COOH
MF:
C48H90NO14P
Chemical Name:
CY5.5-PEG-SH
Structure:
Chemical Name:
Tetrakis(tri-o-tolylphosphine)palladium(0)
CAS:
175164-86-0
MF:
C84H84P4Pd
Chemical Name:
DMPE PEG NHS
Chemical Name:
Monoethoxylsilane-PEG-COOH
Chemical Name:
Retinoic acid PEG azide
Chemical Name:
Cysteine PEG Cysteine
Chemical Name:
Retinoic acid PEG Maleimide
Chemical Name:
Pyralene
Chemical Name:
Polyethylenglykoldiallylether
CAS:
59788-01-1
Chemical Name:
Cellulose diacetate
CAS:
9035-69-2
MF:
C2H4O2
Chemical Name:
SG-PEG-SG
Chemical Name:
4-arm-PEG-OPSS
Chemical Name:
Alkyne-PEG-FITC
Chemical Name:
mPEG-PLGA
Chemical Name:
Tetrazine PEG Biotin
Chemical Name:
Estrogen PEG Fluorescein
Chemical Name:
Retinoic acid PEG Biotin
Chemical Name:
Diethoxylsilane-PEG-Biotin
Chemical Name:
Retinoic acid PEG acid
Chemical Name:
Acetylthio-PEG-Mal
Chemical Name:
Biotin-PEG-CHO
Chemical Name:
CLS-PEG-Biotin
Chemical Name:
Cy5-PEG-COOH
Chemical Name:
DA-PEG-NH2
CAS:
1383691-49-3
Chemical Name:
FITC-PEG-Progestrone
Chemical Name:
mPEG-CLS
Chemical Name:
NH2-PEG-GAA
Chemical Name:
Palmitic acid-PEG-COOH
Chemical Name:
Phosphoric acid-PEG-N3
Chemical Name:
PLGA(50:50)(8K)-PEG-Mal
Chemical Name:
VD-PEG-Mal
Structure:
Chemical Name:
4-(4-Pyridyl)Benzoic Acid
CAS:
2163772-19-6
MF:
C42H45N7O8
Structure:
Chemical Name:
Boron trifluoride acetonitrile complex
CAS:
420-16-6
MF:
C2H3BF3N
Chemical Name:
NA
Chemical Name:
NA
Structure:
Chemical Name:
2,3,4,5-TETRAMETHYLCYCLOPENTADIENEDIMETHYLSILYL-TERT-BUTYLAMIDO TITANIUM DICHLORIDE
CAS:
135072-61-6
MF:
C15H27Cl2NSiTi
Structure:
Chemical Name:
HEXAFLUOROPROPYLENE OXIDE DIMER
MF:
C6F12O2
Structure:
Chemical Name:
Dichloro[η(5):η(1)-N-dimethyl(tetramethylcyclopentadienyl)silyl(tert-butyl)amido]titanium
CAS:
162763-85-1
MF:
C15H27Cl2NSiTi
Chemical Name:
Fmoc-Lys-PEG4-OH
Chemical Name:
Fmoc-NH-PEG-SG
Chemical Name:
C18H37-PEG-Sulfate
Chemical Name:
S-Acetyl-PEG-OH
Chemical Name:
PLGA(17K)-PEG-COOH
Chemical Name:
CY5-PEG-PCL(2K)
Chemical Name:
Monoethoxylsilane-PEG-NH2
Chemical Name:
DLPE-PEG-NH2
Structure:
Chemical Name:
Pentaerythritol glycidyl ether
CAS:
3126-63-4
MF:
C17H28O8
Structure:
Chemical Name:
dipotassium tetrakis(thiocyanato-S)palladate(2-)
CAS:
14516-47-3
MF:
C4K2N4PdS4
Chemical Name:
OLETH-2 PHOSPHATE
CAS:
39464-69-2
MF:
(C18H36O).(C2H4O)n.x(H3PO4)
Chemical Name:
PEG derivatives
Chemical Name:
Palladium carbon catalyst 5%
Chemical Name:
NA
Chemical Name:
Palladium calcium carbonate catalyst
Chemical Name:
Teflon emulsion JF-4DCF
Structure:
Chemical Name:
SPhos Pd G1, Methyl t-Butyl Ether Adduct
CAS:
1028206-58-7
MF:
C34H45ClNO2PPd
Chemical Name:
mPEG-ACA (mPEG-Acrylamide)
Chemical Name:
mPEG-GAS(mPEG-Glutaramide Succinimidyl ester)
Chemical Name:
mPEG-Biotin
Chemical Name:
OPSS-PEG-Silane
Chemical Name:
Br-PEG-Mal
Chemical Name:
Silane-PEG-Biotin
Structure:
Chemical Name:
RuPhos Palladacycle Gen. 4
CAS:
1599466-85-9
MF:
C44H58NO5PPdS
Chemical Name:
PI fiber
Chemical Name:
Biotin-PEG-PFP
Structure:
Chemical Name:
OPSS-PEG-OPSS
MF:
C16H20N2O2S4
Chemical Name:
TCO PEG NHS
Chemical Name:
Glutathione PEG Glutathione
Chemical Name:
Polylysine PEG Conjugate
Chemical Name:
Cy3 PEG Biotin
Structure:
Chemical Name:
Ruthenium powder
MF:
Ru
Structure:
Chemical Name:
tetraamminepalladium(2+) dihydroxide
CAS:
68413-68-3
MF:
H9N4OPd+
Chemical Name:
WELAN GUM
CAS:
96949-22-3
Structure:
Chemical Name:
SALICYLALDEHYDE THIOSEMICARBAZONE PALLADIUM(II) CHLORIDE, 97%
CAS:
219954-63-9
MF:
C8H9Cl2N3OPdS
Chemical Name:
Polymerization inhibitor
Structure:
Chemical Name:
PALLADIUM(II) PROPIONATE
CAS:
3386-65-0
MF:
C3H6O2Pd
Structure:
Chemical Name:
rac-Ethylenebis(4,5,6,7-tetrahydro-1-indenyl)]zirconium dichloride
CAS:
100163-29-9
MF:
C20H24Cl2Zr10*
Structure:
Chemical Name:
(R,R)-(-)-2,3-Bis(t-butylmethylphosphino)quinoxaline
CAS:
866081-62-1
MF:
C18H28N2P2
Structure:
Chemical Name:
4,4'-Butylidenebis(6-tert-butyl-3-methylphenol)
CAS:
85-60-9
MF:
C26H38O2
Chemical Name:
α-ForMyl-ω-carboxyl poly(ethylene glycol)
Structure:
Chemical Name:
[(R)-(+)-2,2′-Bis(di-p-tolylphosphino)-1,1′-binaphthyl]palladiuM(II) chloride
CAS:
191654-69-0
MF:
C48H42Cl2P2Pd
Chemical Name:
Zinc Acrylate Self-polishing Resin
Chemical Name:
Folic acid PEG DSPE
CAS:
1236288-25-7
Chemical Name:
DSPE-PEG-Mal
CAS:
474922-22-0
Chemical Name:
mPEG-COOH
Chemical Name:
ALKYNE-PEG-CHO
Chemical Name:
Polyethylene glycol-G-isocyanate
Structure:
Chemical Name:
Thiol-PEG3-acid
CAS:
1347750-82-6
MF:
C9H18O5S
Chemical Name:
mPEG-NPC(mPEG-4-nitrophenyl carbonate)
Chemical Name:
SA-PEG-SA(Succinic Acid-PEG-Succinic Acid)
Chemical Name:
Acrylamide-PEG-Acrylamide
Chemical Name:
ACA-PEG-OH
Chemical Name:
8-Arm PEG-GA
Structure:
Chemical Name:
DSPE-PEG-ACA
MF:
C47H89N2O11P
Chemical Name:
SPhos Pd G4
Structure:
Chemical Name:
t-BuXphos Palladacycle Gen. 4
CAS:
1599466-89-3
MF:
C44H62Cl2NO3PPdS
Structure:
Chemical Name:
IRON NICKEL OXIDE
CAS:
12168-54-6
MF:
Fe2NiO4
Structure:
Chemical Name:
Ethanol, 2-[2-[2-(triphenylmethoxy)ethoxy]ethoxy]-
CAS:
133699-09-9
MF:
C25H28O4