575-43-9

Usage

Uses

Used in Chemical Industry:
1,6-Dimethylnaphthalene is used as a chemical intermediate for the synthesis of dyes and pigments, contributing to the coloration and enhancement of various products. Its role in this industry is crucial for the development of a wide range of organic compounds.
Used in Agricultural Industry:
In the agricultural sector, 1,6-Dimethylnaphthalene is utilized in the manufacturing of insecticides, playing a significant role in pest control and ensuring crop protection.
Used in Industrial Processes:
1,6-Dimethylnaphthalene serves as a solvent in various industrial processes, facilitating chemical reactions and improving the efficiency of manufacturing operations.
Used in Environmental Regulation:
Due to its classification as a potential environmental pollutant, 1,6-Dimethylnaphthalene is subject to regulation to mitigate its impact on ecosystems and human health.
Used in Fuel Additive Research:
1,6-Dimethylnaphthalene has been investigated for its potential as a fuel additive, leveraging its properties to improve fuel performance and efficiency.
Used in Electronic Materials:
1,6-Dimethylnaphthalene's electronic and optical properties have made it a candidate for use in electronic materials, where it could contribute to the development of advanced technologies in the electronics industry.

InChI:InChI=1/C12H12/c1-9-6-7-12-10(2)4-3-5-11(12)8-9/h3-8H,1-2H3

Upstream product

• 2051-04-9 diisoamyl disulfide 
• 475-03-6 1,2,3,4-tetrahydro-1,1,6-trimethylnaphthalene 
• 54881-55-9 2-(1-Methyl-2-m-tolyl-ethylidene)-malononitrile 
• 83469-38-9 1-<(methoxytrimethylsilyl)methyl>-6-methylnaphthalene 
• 25419-37-8 1,6-dimethyl-5,6,7,8-tetrahydronaphthalene 
• 28884-75-5 1,3,3-trimethyl-2-(3-methyl-1,3-butadienyl)-1-cyclohexene 
• 7446-70-0 aluminium trichloride 
• 483-78-3 cadalene 
• 14087-01-5 (-)-isozingiberene 
• 49749-07-7 4,4,7,8a-tetramethyl-1,2,3,4,4a,5,6,8a-octahydro-naphthalene 
• 3454-06-6 1,6-dimethyl-tetrahydronaphthalene 
• 21564-91-0 1,5-dimethyltetraline 
• 581-40-8 2,3-dimethylnaphthalene 
• 573-98-8 dimethyl-1,2 naphtalene 

Downstream Products

• 108712-23-8 2-(4,7-dimethylnaphthoyl)benzoic acid 
• 23802-60-0 trans-1,6-Bis-(4-phenyl-styryl)-naphthalin 
• 23802-58-6 trans-1,6-Bis-(3,4-dimethoxy-styryl)-naphthalin 
• 23802-59-7 trans-1,6-Bis-<4-phenoxy-styryl>-naphthalin 
• 23802-57-5 trans-1,6-Bis-<4-methoxy-styryl>-naphthalin 
• 63409-04-1 6-methyl-1-naphthaldehyde 
• 102606-09-7 5-methyl-2-naphthaldehyde 
• 102606-10-0 Acetic acid 6-methyl-naphthalen-1-ylmethyl ester 
• 124-38-9 carbon dioxide 
• 569-51-7 benzene-1,2,3-tricarboxlic acid 
• 144-62-7 oxalic acid 
• 64-19-7 acetic acid 
• 2089-87-4 naphthalene-1,6-dicarboxylic acid 
• 37102-74-2 3-methylphthalic acid 

Relevant academic research and scientific papers

Synthesis of Nanosized ZSM-5 Zeolites by Different Methods and Their Catalytic Performance in the Alkylation of Naphthalene

Abstract: Three nanosized ZSM-5 zeolites were successfully prepared from reactive gelswith the same Si/Al ratios by different synthetic procedures that included theuse of tetrapropylammonium hydroxide or n-butylamine as a template and a seedingmethod that did not use an organic additive. The effect of the synthetic methodon the physicochemical properties of the prepared samples was investigated byXRD, XRF, XPS, N2 physisorption, SEM, TEM,27Al MAS NMR, NH3-TPD, andPy-FTIR. The catalytic performance of thenanosized ZSM-5 zeolites in the alkylation of naphthalene with methanol wascompared. The prepared samples were phase-pure, highly crystalline ZSM-5zeolites, but they had different bulk and surface Si/Al ratios as well astextural and acidic properties. The study of the prepared catalysts innaphthalene methylation revealed that both the acid characteristics of the ZSM-5nanosized zeolites and their textural properties were responsible for theiractivity in the reaction. A difference in the composition ofmonomethylnaphthalenes and dimethylnaphthalenes was attributed to the ability ofthe catalyst to isomerize the primary reaction products on acid sites located onthe external surface of the zeolite crystals. 2,7-DMN was found to be thepreferred reaction product over 2,6-DMN when formed at pore entrances to ZSM-5channels due to the differences in their dimensions. In contrast,2,6-dimethylnaphthalene could be produced on weaker external Br?nsted acidsites, which are hydroxyls attached to octahedral Al atoms. The presentedresults show that the method used to synthesize nanoscale ZSM-5 zeolites is acritical factor that determines the physicochemical properties and catalyticperformance of the resulting crystals.

Methylation of 2-methylnaphthalene over metal-impregnated mesoporous MCM-41 for the synthesis of 2,6-triad dimethylnaphthalene isomers

2,6-Dimethylnaphthalene (2,6-DMN) is one of the key intermediates for the production of polyethylene naphthalate (PEN), which demonstrates superior properties compared with the polyethylene terephthalate. However, the complex synthesis procedure of 2,6-DMN increases the production cost and decreases the commercialisation of PEN. In this study, selective synthesis of 2,6-triad DMN isomers (1,5-DMN, 1,6-DMN and 2,6-DMN) has been investigated by the methylation of 2-methylnaphthalene (2-MN) over mesoporous Cu/MCM-41 and Zr/MCM-41 zeolite catalysts. On the contrary of other DMN isomers, 2.6-triad isomers can effectively be converted to be profitable 2,6-DMN with an additional isomerisation reaction, which is a new approach to reach higher 2,6-DMN yield. The methylation reactions of 2-MN were investigated in a fixed-bed reactor at 400?°C and weight hourly space velocity of 1–3?h?1. The results showed that the activity of MCM-41 on the methylation of 2-MN has been enhanced with the impregnation of Cu. The conversion increased from about 17% to 35 wt% with the impregnation of Cu. Similarly, the 2,6-triad DMN selectivity and 2,6-/2,7-DMN ratio reached the maximum level (48 wt% and 1.95, respectively) over Cu-impregnated MCM-41 zeolite catalyst.

Selective synthesis of 2,6-triad dimethylnaphthalene isomers by disproportionation of 2-methylnaphthalene over mesoporous MCM-41

2,6-Dimethylnaphthalene (2,6-DMN) is one of the crucial intermediates for the synthesis of polybutylenenaphthalate and polyethylene naphthalate (PEN). The complex synthesis procedure and the high cost of 2,6-DMN production significantly reduce the commercialisation of PEN even though PEN demonstrates superior properties compared with polyethylene terephthalate. 2,6-DMN can be produced by methylation of 2-methylnaphthalene (2-MN) and/or naphthalene, disproportionation of 2-MN, and/or isomerisation of dimethylnaphthalenes (DMNs). In this study, synthesis of 2,6-triad DMN isomers consisting of 2,6-DMN, 1,6-DMN, and 1,5-DMN have been investigated with the disproportionation of 2-MN over unmodified and Zr-modified mesoporous MCM-41 zeolite catalysts. In contrast to other DMN isomers, both 1,5-DMN and 1,6-DMN can be effectively isomerised to be profitable 2,6-DMN. The disproportionation of 2-MN experiments were carried out in a catalytic fixed-bed reactor in the presence of 1?g of catalyst at a temperature range of 350–500?°C and weight hourly space velocity between 1 to 3?h?1. The results demonstrated that mesoporous MCM-41 zeolite catalyst has a selective pore shape for 2,6-triad DMN isomers, which may allow a decrease in the production cost of 2,6-DMN. Additionally, 2,6-DMN was successfully synthesised by the disproportionation of 2-MN over MCM-41 zeolite catalyst. Furthermore, both the conversion of 2-MN and the selectivity of 2,6-DMN were considerably enhanced by the Zr impregnation on MCM-41.

Methylation of naphthalene on MTW-type zeolites. Influence of template origin and substitution of Al by Ga

Two templates, methyltriethylammonium bromide (MTEA) and tetraethylammonium bromide (TEA) were used to synthesize aluminosilicate ZSM-12 zeolites. Additionally, zeolites isomorphously substituted (partially or totally) by gallium were prepared with MTEA.

Method for producing dimethylnaphthalene using a metal catalyst

Disclosed herein is a process of producing high purity and high yield dimethylnaphthalene by dehydrogenating a dimethyltetralin isomer using a metal catalyst for dehydrogenation. The metal catalyst contains a carrier selected from alumina (Al2O3), silica (SiO2), a silica-alumina mixture and zeolite. The metal catalyst also contains 0.05 to 2.5 % by weight of platinum (Pt), 0.1 to 3.0 % by weight of tin (Sn) or indium (In), 0.5 to 15.0 % by weight of at least one selected from the group consisting of potassium (K), magnesium (Mg) and cesium (Cs), 0.3 to 3.0 % by weight of chlorine, and 0.01 to 3.0 % by weight of zinc (Zn) or gallium (Ga) as active components based on an element weight of the final catalyst.

Dehydrogenation process of dimethylnaphthalene using metal catalyst

Disclosed herein is a process of producing high purity and high yield dimethylnaphthalene by dehydrogenating a dimethyltetralin isomer using a metal catalyst for dehydrogenation. The metal catalyst contains a carrier selected from alumina (Al2O3), silica (SiO2), a silica-alumina mixture and zeolite. The metal catalyst also contains 0.05 to 2.5% by weight of platinum (Pt), 0.1 to 3.0% by weight of tin (Sn) or indium (In), 0.5 to 15.0% by weight of at least one selected from the group consisting of potassium (K), magnesium (Mg) and cesium (Cs), 0.3 to 3.0% by weight of chlorine, and 0.01 to 3.0 % by weight of zinc (Zn) or gallium (Ga) as active components based on an element weight of the final catalyst.

Method for obtaining 2,6-dimethylnaphthalene using isomerization and crystallization processes

The present invention relates to a method for preparation, separation and purification of high-purity 2,6-dimethylnaphthalene. The method according to the present invention comprises a step of subjecting a dimethylnaphthalene isomer mixture rich in 1,5-dimethylnaphthalene, high boiling point materials, unreacted 1,5-dimethyltetralin, and low boiling point materials, which are produced from a dehydrogenation reaction of 1,5-dimethyltetralin, to separation, using a distillation column;a step of subjecting the dimethylnaphthalene mixture separated by the distillation column to liquid state isomerization in the presence of an isomerization catalyst;a first crystallization step (melt crystallization process) of cooling the product of liquid state isomerization with a refrigerant without a solvent to form crystals; anda second crystallization step (solution crystallization process) of mixing the product of the first crystallization step with a solvent to form crystals.

Process for producing organic compounds by catalysis of imide compounds

A process produces an organic compound by catalysis of an imide compound of Formula (1): wherein R1 and R2 are each an alkyl group, aryl group, cycloalkyl group, etc., where R1 and R2 may be combined to form a double bond, or an aromatic or non-aromatic ring; and X is an oxygen atom or a hydroxyl group. In this process, the imide compound catalyst is added in installments to the reaction system to perform a reaction. Such reactions include, for example, oxidation reactions, carboxylation reactions, nitration reactions, sulfonation reactions, and carbon-carbon bond formation reactions. This process can produce a target compound with a higher conversion or selectivity in the production of the organic compound by catalysis of the imide compound catalyst such as N-hydroxyphthalimide.

Characterization of the combustion products of polyethylene

Polyethylene (PE) was burned in a tube-type furnace with an air flow at a temperature of 600~900°C. Combustion products were collected with glass wool, glass fiber filter, and XAD-2 adsorbent. The analysis of the products was performed with GC-FID and GC-MSD. At low temperature, hydrocarbons were the major components, while at higher temperature the products were composed of polycyclic aromatic hydrocarbons. With the high performance of the Hewlett-Packard 6890GC-5973MSD, more compounds were identified in comparison with previous studies.