1. Introduction
antiknock agent, also known as an octane booster and seismic agent. To prevent or minimize combustion of gasoline in a gasoline engine knocking, and improve the thermal efficiency of octane additives. Usually organometallic compound (such as tetraethyl lead, the lead poisoning and air pollution, has been eliminated), aromatic amines (e.g., N- dimethylaniline) with an alkyl halide and the like.
2, associated entries
gasoline antiknock additive (MMT)
1, product name:
Chemical name: Methyl tricarbonyl manganese carbonyl chemical formula: C6H7Mn (CO) 3 existing forms: liquid
2. Physical and chemical properties
table 1 HS – 3098 typical physicochemical properties
properties unit typical data
form orange liquid
manganese content of 24.4 weight percent
density @ 20 ℃ g / ml ≥1.36
Freezing point (initial) -1 deg.] C
Flash point (closed) 94 deg.] C
solubility miscible gas
in toluene may be mixed solution
water, 20 ℃ 5ppm
glycerol 5 percentage
ingredients composition
(wt%) MMT> 98 Percent
oil solvent <2 Percent
tABLE 2 HS – typical physical and chemical properties 3062
properties unit typical data
form orange liquid
15.1 weight percent manganese content
density @ 20 ℃ g / ml ≥1.10
Freezing point (initial) -30 deg.] C
light oil solvent Flash point (closed) 50 deg.] C
ingredients composition
(wt%)
MMT> 62 percentage percentage 0-40
heavy solvent Oil 0-40 Percent
Other aromatic 0-40 percentage
3, the mechanism: similar to the mechanism of action of tetraethyl lead, i.e. decomposition of activated manganese oxide particles under combustion conditions, because of their active surface, Which destroy peroxide generated in an automobile engine, resulting in reduced concentration of the pre-flame reaction of peroxide, while selectively interrupting the chain reaction part, thus preventing automatic fire, slowing the release of energy, fuel resistance explosion improved.
wherein the liquid product is added some additives, antiknock agglomeration can effectively prevent the decomposition of the main agent; simultaneously, auxiliaries can be generated outside the combustion machine and a metal oxide derived promote the combustion of gasoline antiknock after the main agent gasoline complete combustion, reduce exhaust emissions, reducing coke combustion and improve overall product performance.
4, the performance characteristics:
(1) to increase gasoline octane
MMT in gasoline was added micros, the manganese content does not exceed 18mg / L, can increase gasoline octane 2 ~ 3 units.
(2) improving the car power, reduces fuel consumption
by the Ministry of motor transport industry energy use monitoring center engine bracket experiments show: MMT additions of unleaded gasoline and 90 # 90 # MMT-free unleaded gasoline compared improve engine performance and reduce fuel consumption. Parts of
(3) an oxygen-containing group such as ethanol and MTBE good fit of the
and an MMT MTBE, ethanol adduct having good properties in octane improvers, which provides convenience for the production of high grade gasoline . To meet the higher octane, but also to avoid excessive use of MTBE performance degradation caused by excessive automobile power, and can meet the “oxygen content of not more than 2.7 percent” of the national standard.
(4) reduce automobile exhaust emissions
MMT additions of 90 # unleaded gasoline without additive and 90 # unleaded gasoline engine exhaust CO decreased compared to 17.7 percentage, HC 18.2 percentage decrease.
(5) improvement of automobile exhaust gas catalytic converter
is recognized as phosphorus catalyst toxins may be cleared when the MMT phosphorus combustion and reduce deposits on the catalyst, and therefore to extend the use of MMT fuel catalyst the life of the catalyst to maintain high conversion to more efficiently convert harmful gases, reducing pollutant emissions.
(6) improve refinery operations
● reformer severity reduction operation
● reduced aromatics content in gasoline
● reduce the olefin content in gasoline
● reduce the required amount of crude
(7) increase in gasoline blending flexibility
can be obtained by rational use of MMT, MTBE, reformed gasoline, straight-run gasoline, and the catalytic gasoline to bring up a variety of petroleum products.
5, using the method: the MMT diluted
(1): For high concentrations of MMT should be diluted before adding to gasoline, the MMT special additives added simultaneously with a solvent (such as toluene, mixed xylene, ethanol, mineral spirits, gasoline, etc.), under N2 protection, was stirred for 30 minutes to fully dissolve, dubbed MMT solution, then, to the solution was transferred formulated gasoline.
(2) a low concentration of MMT products can be directly transferred in proportion gasoline.
(3) MMT product was added an amount of:
Product Type on gasoline content of manganese per liter of gasoline was added an amount
HS-309824.4% 102g0.074g
HS-306215.1% 165g0.119g
6, packing: 200L using galvanized iron packaging, weighing barrel 180Kg; according to the actual needs of customers can use other forms of packaging. 7, Storage: Store in a cool, dry, well-ventilated area away from the fire source, close the container when not in use; MMT gasoline containing the sample, the sample must be left a dark brown bottle.
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