Antioxidants UV absorbers Antioxidant Polyethylene glycol derivatives Fluorescent brightener Plastic rubber chemicals polymer Precious Metal Catalysts Coupling Zeolite Flame retardants Petrochemical Fluor reagent
ChemicalBook >   Product Catalog >  Catalyst and Auxiliary

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
More
Less

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:
Fluorescent Brightener 220
CAS:
16470-24-9
MF:
C40H45N12NaO16S4
Structure:
Chemical Name:
DIETHYL AZELATE
CAS:
624-17-9
MF:
C13H24O4
Structure:
Chemical Name:
2,2'-Thiobis(4-tert-octylphenolato)-n-butylamine nickel(II)
CAS:
14516-71-3
MF:
C32H51NNiO2S
Structure:
Chemical Name:
2-tert-Butyl-1,4-benzoquinone
CAS:
3602-55-9
MF:
C10H12O2
Structure:
Chemical Name:
4-Dodecyloxy-2-hydroxybenzophenone
CAS:
2985-59-3
MF:
C25H34O3
Structure:
Chemical Name:
1,2-Benzenedicarboxylic acid di-C9-11-branched alkyl esters C10-rich
CAS:
68515-49-1
MF:
C28H46O4
Structure:
Chemical Name:
DI-N-HEXYL PHTHALATE
CAS:
84-75-3
MF:
C20H30O4
Structure:
Chemical Name:
TRIETHYLENE GLYCOL MONOMETHYL ETHER
CAS:
112-35-6
MF:
C7H16O4
Structure:
Chemical Name:
UV-1577
CAS:
147315-50-2
MF:
C27H27N3O2
Structure:
Chemical Name:
Poly[N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine-co-2,4-dichloro-6-morpholino-1,3,5-triazine]
CAS:
82451-48-7
MF:
C7H8Cl2N4O
Structure:
Chemical Name:
Oxydipropyl dibenzoate
CAS:
27138-31-4
MF:
C20H22O5
Structure:
Chemical Name:
Poly(methyl methacrylate)
CAS:
9011-14-7
MF:
C15H24O6X2
Structure:
Chemical Name:
HEXAETHYLENE GLYCOL MONOMETHYL ETHER
CAS:
23601-40-3
MF:
C13H28O7
Structure:
Chemical Name:
4,4'-Dithiodimorpholine
CAS:
103-34-4
MF:
C8H16N2O2S2
Structure:
Chemical Name:
Diisobutyl fumarate
CAS:
7283-69-4
MF:
C12H20O4
Chemical Name:
Polyethylene glycol dimethyl ether
CAS:
24991-55-7
MF:
H3CO(C2H4O)nCH3
Structure:
Chemical Name:
Diethyl 3,5-di-tert-butyl-4-hydroxybenzyl phosphate
CAS:
976-56-7
MF:
C19H33O4P
Structure:
Chemical Name:
HEXYL ACETATE
CAS:
88230-35-7
MF:
C8H16O2
Structure:
Chemical Name:
ETHYL PHTHALYL ETHYL GLYCOLATE
CAS:
84-72-0
MF:
C14H16O6
Structure:
Chemical Name:
2,2'-Thiobis(6-tert-butyl-p-cresol)
CAS:
90-66-4
MF:
C22H30O2S
Structure:
Chemical Name:
DIBUTYL ITACONATE
CAS:
2155-60-4
MF:
C13H22O4
Structure:
Chemical Name:
Plasticizer 8
CAS:
26914-52-3
MF:
C9H15NO2S
Structure:
Chemical Name:
Fluorescent brightener 71
CAS:
16090-02-1
MF:
C40H38N12Na2O8S2
Structure:
Chemical Name:
Poly(ethylene glycol) diacrylate
CAS:
26570-48-9
MF:
C5H10O4
Chemical Name:
SOLVENT DEGREASER
CAS:
64742-49-0
MF:
N/A
Structure:
Chemical Name:
4-Nitronaphthalene-1,8-dicarboxylic anhydride
CAS:
34087-02-0
MF:
C12H5NO5
Structure:
Chemical Name:
2,2'-Methylenebis(6-cyclohexyl-4-methyl)phenol
CAS:
4066-02-8
MF:
C27H36O2
Structure:
Chemical Name:
FLUORESCENT BRIGHTENER 28
CAS:
4404-43-7
MF:
C40H44N12O10S2
Structure:
Chemical Name:
Poly(acrylic acid)
CAS:
9003-01-4
MF:
C5H10O2
Structure:
Chemical Name:
5-BENZOXAZOLOL, 2-METHYL-
CAS:
23997-94-6
MF:
C8H7NO2
Chemical Name:
Α-azido-Ω-mercapto polyethylene glycol
Structure:
Chemical Name:
Propanoic acid, 2-?hydroxy-?, polymer with 2-?hydroxyacetic acid
CAS:
34346-01-5
MF:
C5H10O6
Structure:
Chemical Name:
2-Hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone
CAS:
106797-53-9
MF:
C12H16O4
Chemical Name:
8-Arm PEG-ACA
Chemical Name:
LA-PEG-OH
Chemical Name:
Fmoc-NH-PEG-Mal
Chemical Name:
Silane-PEG-OH
Chemical Name:
6-NO2DA-PEG-OH
Chemical Name:
COOH-PEG16-COOH
Chemical Name:
DMPE-PEG-Mal
Chemical Name:
DPPE-PEG-COOH
Chemical Name:
Estrogen-PEG-NH2
Chemical Name:
FA-PEG-FA
Chemical Name:
mPEG25-N3
Chemical Name:
mPEG-STA
Chemical Name:
OH-PEG48-OH
Chemical Name:
PLA(5K)-PEG-NH2
Chemical Name:
SC-PEG-MTA
Chemical Name:
STA-PEG-Mal
Chemical Name:
Tocopherol-PEG-Mal
Chemical Name:
POLYOXYETHYLENE 10 TRIDECYL ETHER
CAS:
78330-21-9
MF:
C13H27(OCH2CH2)nOH,n~12
Structure:
Chemical Name:
2,5-Dioxopyrrolidin-1-yl 3-(2-(3-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)propanamido)ethoxy)propanoate
CAS:
1260092-50-9
MF:
C16H19N3O8
Chemical Name:
FITC-PEG-OPSS
Structure:
Chemical Name:
Dioctyldiphenylamine
CAS:
101-67-7
MF:
C28H43N
Structure:
Chemical Name:
Gold evaporating material silver evaporating material platinum evaporating material palladium evaporating material
MF:
Au
Chemical Name:
NA
Structure:
Chemical Name:
-ether-PEG5-amine
CAS:
2341841-01-6
MF:
C25H36ClN3O10
Chemical Name:
High Purity Ruthenium Powder
Chemical Name:
Cy3.5-PEG-COOH
Chemical Name:
Boc-NH-PEG4-ACA
Chemical Name:
4-ArmPEG-DTPA
Chemical Name:
BOC-NH-PEG-SS
Chemical Name:
PCL(5K)-PEG-CHO
Chemical Name:
Diethoxylsilane-PEG-Mal
Chemical Name:
Alkyne-PEG-SVA
Chemical Name:
Cy3-PEG-Mal
Chemical Name:
mPEG-NH-CHO
Chemical Name:
NH2-PEG-PA
Chemical Name:
MTX-PEG-NH2
Chemical Name:
PAA(2K)-PEG-NH2
Chemical Name:
NH2-PEG-Mannose
Chemical Name:
SH-PEG7-NH2.HCl
Chemical Name:
[DSPE-PEG-MAL] α-Maleimidyl-ω-distearoyl-sn-glycero-3-phosphoethanolamino poly(ethylene glycol)
Chemical Name:
Teflon micropowder rubber and plastic
Structure:
Chemical Name:
PVM/MA
CAS:
1644545-52-7
MF:
C14H13ClF6N6
Structure:
Chemical Name:
BIS(2-METHYLALLYL)PALLADIUM CHLORIDE DIMER
CAS:
12081-18-4
MF:
C16H28Cl2Pd2
Chemical Name:
CARBOPOL ETD 2020
CAS:
176429-87-1
Structure:
Chemical Name:
Poly(dimethylamine-co-epichlorohydrin-co-ethylenediamine)
CAS:
42751-79-1
MF:
C7H20ClN3O
Structure:
Chemical Name:
1,3-Dimethyl-1,3-diphenylurea
CAS:
611-92-7
MF:
C15H16N2O
Structure:
Chemical Name:
Chloro[1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene]gold(I)
CAS:
852445-81-9
MF:
C21H24AuClN2
Structure:
Chemical Name:
Di-chlorobis[(1,2,3-)-1-phenyl-2-propenyl]dipalladium(II)
CAS:
12131-44-1
MF:
C18H12Cl2Pd2
Chemical Name:
α-Azido-ω-MaleiMidyl poly(ethylene glycol)
Structure:
Chemical Name:
DibroMo(1,5-cyclooctadiene)palladiuM(II)
CAS:
12145-47-0
MF:
C8H12Br2Pd
Chemical Name:
acrylate-PEG-acrylate
Structure:
Chemical Name:
Thio-PEG12-acid
CAS:
1032347-93-5
MF:
C27H54O14S
Chemical Name:
mPEG-SA(mPEG-Succinic acid)
Chemical Name:
mPEG-VS(mPEG-Vinyl sulfone)
Chemical Name:
Iodoacetyl-PEG-Biotin
Chemical Name:
DSPE-PEG-Silane
Chemical Name:
FITC-PEG-NHS
Structure:
Chemical Name:
S-acetyl-PEG4-Propargyl
CAS:
1422540-88-2
MF:
C13H22O5S
Structure:
Chemical Name:
Di-μ-iodobis(tri-t-butylphosphino)dipalladium(I)
CAS:
166445-62-1
MF:
C24H56I2P2Pd2
Structure:
Chemical Name:
ALPHA,OMEGA-BIS(PROPIONIC ACID) DODECAE(ETHYLENE GLYCOL)
CAS:
892155-64-5
MF:
C30H58O17
Structure:
Chemical Name:
POTASSIUM TETRANITROPALLADATE(II)
CAS:
13844-89-8
MF:
K2N4O8Pd
Chemical Name:
Tetrazine PEG Maleimide
Chemical Name:
Lysine PEG Lysine
Chemical Name:
DMPE PEG NBD
Chemical Name:
Monoethoxylsilane-PEG-Biotin
Chemical Name:
CHO-PEG12-COOH
Structure:
Chemical Name:
Chloro{1,3-bis[2,6-di-i-propylphenyl]-4,5-dihydroimidazol-2-ylidene}gold(I)
CAS:
852445-84-2
MF:
C27H38AuClN2