一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

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
PAC flocculant PAC flocculant
Hyaluronic acid finishing agent Hyaluronic acid finishing agent
Diisopropyl peroxydicarbonate Diisopropyl peroxydicarbonate 105-64-6 C8H14O6
SODIUM 2,4-PENTANEDIONATE SODIUM 2,4-PENTANEDIONATE 15435-71-9 C5H7NaO2
AdBrettPhos Pd G3 AdBrettPhos Pd G3 1445972-29-1 C56H74NO5PPdS
R-4-oxide-4-hydroxy-2,6-bis(2,4,6-triMethylphenyl)-Dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin R-4-oxide-4-hydroxy-2,6-bis(2,4,6-triMethylphenyl)-Dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin 695162-87-9 C38H33O4P
CGE CGE
Humectant G18 Humectant G18
Cationic polymer flocculant Cationic polymer flocculant
Special flocculant for coal washing Special flocculant for coal washing
Catocene Catocene 37206-42-1 C17H22Fe10*
dBET1 dBET1 1799711-21-9 C38H37ClN8O7S
Chloro(2-methylphenyl)bis(triphenylphosphine)nickel(II) Chloro(2-methylphenyl)bis(triphenylphosphine)nickel(II) 27057-09-6 C43H39ClNiP2
3-(2-Fluoroethoxy)propylamine 3-(2-Fluoroethoxy)propylamine 593-00-0 C5H12FNO
Carburizer Carburizer
Polyether amino silicone oil Polyether amino silicone oil
Plastic auxiliary SB-200 Plastic auxiliary SB-200
P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% P,P′-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis[N,N,N′,N′-tetraethyl-phosphonous diamide] 97% 349100-75-0 C31H52N4OP2
PHYTANTRIOL PHYTANTRIOL 74563-64-7 C20H42O3
DC-0400 leveling agent DC-0400 leveling agent
L-Lactide(Medical,Implantable degradation) L-Lactide(Medical,Implantable degradation)
Burgess reagent Burgess reagent 29684-56-8 C8H18N2O4S
GLYCEROL ETHOXYLATE GLYCEROL ETHOXYLATE 31694-55-0 (C2H4O)n(C2H4O)n(C2H4O)nC3H8O3
TG-810 defoamer TG-810 defoamer
(2R)-2,3-Dihydro-2-phenylimidazo[2,1-b]benzothiazole (2R)-2,3-Dihydro-2-phenylimidazo[2,1-b]benzothiazole 885051-07-0 C15H12N2S
Vinyl tri (2-methoxyethoxy) silane IOTA-5072 Vinyl tri (2-methoxyethoxy) silane IOTA-5072
9-(BroMoMethyl)nonadecane 9-(BroMoMethyl)nonadecane 69620-20-8 C20H41Br
Carson fungicide Carson fungicide
Ceteareth-100 Ceteareth-100
1-AMINO-3-BUTENE HYDROCHLORIDE 1-AMINO-3-BUTENE HYDROCHLORIDE 17875-18-2 C4H10ClN
CARBOMER676 CARBOMER676
MOLECULAR SIEVES MOLECULAR SIEVES 1327-39-5 Al2Ca2O15Si5
Docosanamide, N,N'-1,6-hexanediylbis- Docosanamide, N,N'-1,6-hexanediylbis- 96548-58-2 C50H100N2O2
AKD polymer emulsifier for papermaking AKD polymer emulsifier for papermaking
Waterproof and Oil-Proof Finishing Agent Waterproof and Oil-Proof Finishing Agent
Three Proofing Finishing Agent Three Proofing Finishing Agent
(η(5):η(1)-C9H6SiMe2N(t)Bu)ZrCl2 (η(5):η(1)-C9H6SiMe2N(t)Bu)ZrCl2 135571-34-5 C15H19Cl2NSiZr
Ferrous acetylacetonate Ferrous acetylacetonate 14024-17-0 C10H14FeO4
2,2',4-Tris(2-chlorophenyl)-5-(3,4-dimethoxyphenyl)-4',5'-diphenyl-1,1'-biimidazole 2,2',4-Tris(2-chlorophenyl)-5-(3,4-dimethoxyphenyl)-4',5'-diphenyl-1,1'-biimidazole 100486-97-3 C44H31Cl3N4O2
Silica-supported Tetrazolium Silica-supported Tetrazolium
Eight carbon water and oil proof finishing agent Eight carbon water and oil proof finishing agent
POLYGLYCERYL-8 OLEATE POLYGLYCERYL-8 OLEATE 75719-56-1
DY composite flocculant DY composite flocculant
Coating preservative Coating preservative
Pd adsorbent Pd adsorbent
Polydimethylsiloxane PEG/PPG-15/10 9919 Polydimethylsiloxane PEG/PPG-15/10 9919
Nano silver antibacterial powder Nano silver antibacterial powder
JL8 JL8
BT-2066 BT-2066
Biochemical promoter (nano iron) Biochemical promoter (nano iron)
TG-901 defoaming agent TG-901 defoaming agent
KB601 long chain alkyl silicone oil KB601 long chain alkyl silicone oil
Water Decoloring Agent Water Decoloring Agent
Plant deodorant deodorizes and eliminates odors Plant deodorant deodorizes and eliminates odors
Polyglyceryl-2 Isostearate Polyglyceryl-2 Isostearate 73296-86-3 C24H50O7
Quaternary ammonium compounds, di-C14-18-alkyldimethyl, chlorides Quaternary ammonium compounds, di-C14-18-alkyldimethyl, chlorides 68002-59-5 C34H72ClN
Pretreatment agent RP-98 Pretreatment agent RP-98
chloroethoxyethylaluminium chloroethoxyethylaluminium 6013-78-1 C4H8AlClO
epoxy functionalized colloidal silica, epoxy modified nano silica colloid, epoxy functionalized silica epoxy functionalized colloidal silica, epoxy modified nano silica colloid, epoxy functionalized silica
hydroxy functionalized colloidal silica, hydroxy modified colloidal silica, hydroxy functionalized nano silica,  hydroxy modified silica nanoparticles hydroxy functionalized colloidal silica, hydroxy modified colloidal silica, hydroxy functionalized nano silica, hydroxy modified silica nanoparticles
Strong Penetrant JFC-E Strong Penetrant JFC-E
Emulsifier DOM Emulsifier DOM
2,5,8,11-tetramethyldodec-6-yne-5,8-diol 2,5,8,11-tetramethyldodec-6-yne-5,8-diol 68227-33-8 C16H30O2
PHENYL TRIMETHICONE PHENYL TRIMETHICONE 73559-47-4
JADEADD 276 JADEADD 276
MF dispersant high concentration aqueous solution MF dispersant high concentration aqueous solution
C12-14 Alkyl Clycidyl Ether C12-14 Alkyl Clycidyl Ether
Dispersing agent IW Dispersing agent IW
Brightening agent Brightening agent
Water-based defoamer Water-based defoamer
Copper extractant N910 Copper extractant N910
High viscosity silicone oil iota PDMS 47v5000 - 47v500000 High viscosity silicone oil iota PDMS 47v5000 - 47v500000
Proxan sodium Proxan sodium 140-93-2 C4H7NaOS2
FANGFUJI FANGFUJI
Lameform TGI Lameform TGI
TG-4000 wetting agent TG-4000 wetting agent
DC-0349 emulsified silicone oil DC-0349 emulsified silicone oil
(η-cumene)-(η-cyclopentadienyl)iron(II) hexafluoroantimonate (η-cumene)-(η-cyclopentadienyl)iron(II) hexafluoroantimonate 100011-37-8 C14H7F6FeSb
R-3,3'-Bis(3,5-bis(methyl)phenyl)-1,1'-binaphthyl-2,2'-diyl hydrogenphosphate R-3,3'-Bis(3,5-bis(methyl)phenyl)-1,1'-binaphthyl-2,2'-diyl hydrogenphosphate 861909-53-7 C36H29O4P
PalladiuM, [1,3-bis[2,6-bis(1-Methylethyl)phenyl]-1,3-dihydro-2H-iMidazol-2-ylidene]dichloro(1-Methyl-1H-iMidazole-kN3)-, (SP-4-1)- PalladiuM, [1,3-bis[2,6-bis(1-Methylethyl)phenyl]-1,3-dihydro-2H-iMidazol-2-ylidene]dichloro(1-Methyl-1H-iMidazole-kN3)-, (SP-4-1)- 1314876-23-7 C31H42Cl2N4Pd
Environmentally friendly penetrant JFC Environmentally friendly penetrant JFC
Efficient dephosphorization flocculant HW-99 Efficient dephosphorization flocculant HW-99
WEICON W44T WEICON W44T
LITHIUM TETRACHLOROALUMINATE LITHIUM TETRACHLOROALUMINATE 14024-11-4 AlCl4Li
RICINOLEIC ACID RICINOLEIC ACID 61789-44-4 C18H34O3
Dichloro[η(5):η(1)-N-dimethyl(tetramethylcyclopentadienyl)silyl(tert-butyl)amido]titanium Dichloro[η(5):η(1)-N-dimethyl(tetramethylcyclopentadienyl)silyl(tert-butyl)amido]titanium 162763-85-1 C15H27Cl2NSiTi
Chitosan antibacterial finishing agent Chitosan antibacterial finishing agent
Paper fungicide Paper fungicide
Diisobutyryl peroxide Diisobutyryl peroxide 3437-84-1 C8H14O4
Emulsifier 400MO Emulsifier 400MO
Pentaerythritol glycidyl ether Pentaerythritol glycidyl ether 3126-63-4 C17H28O8
zinc bis[p-toluenesulphinate] zinc bis[p-toluenesulphinate] 24345-02-6 C14H14O4S2Zn
phenyl functionalized colloidal silica, phenyl modified nano silica, phenyl silica nanoparticles phenyl functionalized colloidal silica, phenyl modified nano silica, phenyl silica nanoparticles
OLETH-2 PHOSPHATE OLETH-2 PHOSPHATE 39464-69-2 (C2H4O)nC18H36O.xH3O4P
Anti-skinning agent Anti-skinning agent
deodorant deodorant
plant deodorant plant deodorant
Pingping plus 25 Pingping plus 25
Naphthalene series high efficiency slushing agent Naphthalene series high efficiency slushing agent
(R)-SEGPHOS (R)-SEGPHOS 244261-66-3 C38H28O4P2
HomePage | Member Companies | Advertising | Contact us | Previous WebSite | MSDS | CAS Index | CAS DataBase
Copyright © 2016 ChemicalBook All rights reserved.
巨野县| 陇南市| 伊通| 海门市| 临清市| 石泉县| 宜宾市| 兰坪| 汝阳县| 宜城市| 五大连池市| 东丽区| 平湖市| 保靖县| 安泽县| 乐清市| 龙川县| 博罗县| 大渡口区| 尼勒克县| 蒙阴县| 山丹县| 宜丰县| 合水县| 盐源县| 乌恰县| 金沙县| 阳山县| 靖宇县| 洮南市| 齐齐哈尔市| 汉阴县| 湟源县| 正定县| 长子县| 安图县| 虹口区| 宁德市| 都昌县| 常熟市| 同江市|