WO2007066915A1 - Environment-friendly hydrocarbon solvent composition removed normal hexane - Google Patents

Environment-friendly hydrocarbon solvent composition removed normal hexane Download PDF

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Publication number
WO2007066915A1
WO2007066915A1 PCT/KR2006/004980 KR2006004980W WO2007066915A1 WO 2007066915 A1 WO2007066915 A1 WO 2007066915A1 KR 2006004980 W KR2006004980 W KR 2006004980W WO 2007066915 A1 WO2007066915 A1 WO 2007066915A1
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Prior art keywords
hydrocarbon solvent
solvent composition
hydrocarbon
weight
hexane
Prior art date
Application number
PCT/KR2006/004980
Other languages
French (fr)
Inventor
Jae Suk Koh
Jeong Eop Choi
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Sk Energy Co., Ltd.
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Publication of WO2007066915A1 publication Critical patent/WO2007066915A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
    • C10G21/12—Organic compounds only
    • C10G21/14—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/01—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G7/00—Distillation of hydrocarbon oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20—Characteristics of the feedstock or the products
    • C10G2300/30—Physical properties of feedstocks or products
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/18—Solvents

Definitions

  • the present invention relates to an industrial solvent for use as an industrial cleaning solvent, a solvent for adhesives and tapes, and a solvent for drug reactions. More particularly, the present invention relates to an industrial solvent composition, which contains little or no aromatic component and n-hexane, which are hazardous to human health.
  • Prior industrial cleaning solvents particularly n-hexane solvents for electronic cleaning applications, are compositions characterized by an n-hexane content of more than 60%, distillation properties such as an initial boiling point of higher than 65 ° C, a dry point of lower than 70 ° C and an aniline point of lower than 70 ° C .
  • Such n-hexane solvents can be produced by the hydrotreating and fractional distillation of fractions produced in petrochemical processes and oil-refining processes.
  • Such n-hexane solvents have been widely used for the cleaning of electronic devices and electronic parts due to their suitable dissolving ability and fast drying properties.
  • naphthene petroleum solvents are used as, for example, metal processing oils, ink solvents and cleaning solvents.
  • straight-chain paraffin is widely used as a raw material for, for example, soft alkylbenzene, chlorinated paraffin or ⁇ -olefin, and the demand therefor has recently increased.
  • the naphthene petroleum solvents are frequently produced by the hydrogenation of petroleum fractions, but if hydrogenation is not sufficiently performed, the resulting petroleum solvents will contain a large amount of aromatic hydrocarbons. If the petroleum solvents contain aromatic hydrocarbons, for example, alkylbenzenes, they will cause offensive odors, and thus worsen a working environment.
  • Japanese Patent Laid-Open Publication No. Hei 2- 67396 discloses a method of producing a hydrocarbon solvent having an aromatic content of less than 2 wt% by hydrogenating a petroleum fraction and then removing n-paraffin from the hydrogenated fraction.
  • the n-paraffin removal method disclosed in the patent document is a reaction for removing n-paraffin from the hydrogenated product using a zeolite catalyst.
  • this reaction removes n-paraffin by the decomposition or isomerization of n-paraffin, it has a disadvantage in that the yield of n-paraffin is reduced, even though a low-aromatic hydrocarbon solvent is obtained.
  • Japanese Patent Laid-Open Publication No. Sho 63-15889 discloses a method of producing a hydrocarbon solvent containing a given amount of aromatic hydrocarbon by carrying out the nuclear hydrogenation of a kerosene fraction and then removing n-paraffin from the hydrogenated product.
  • this method has a shortcoming in mat the efficiency of the n- paraffin removal process is low due to insufficient desulfurization.
  • a hydrogenation reaction is carried out in order to further reduce the aromatic content of the hydrocarbon solvent, which contains a given amount of aromatic hydrocarbon, obtained in this method, there is a shortcoming in that the remaining sulfur, resulting from insufficient desulfurization, acts as a catalyst poison, which reduces the life of the catalyst for the hydrogenation reaction.
  • Fractionated petroleum solvents are sometimes used, and are a composition having an aromatic content of more than 5%, a n-hexane content of more than 10%, and distillation properties such as an initial boiling point of higher than 35 " C and a dry point of lower than 140 "C .
  • This solvent can be produced by the fractional distillation of fractions produced in petrochemical processes and oil refining processes.
  • the present invention has been made to solve the problems with the prior hydrocarbon solvents, and it is an object of the present invention to provide a non-aromatic, low-n-hexane, industrial solvent composition having reduced human health risks.
  • a hydrocarbon solvent composition according to the present invention contains a significantly reduced amount of n-hexane and aromatic contents, unlike the prior solvent compositions, and thus has reduced human health risks. Accordingly, the inventive hydrocarbon solvent composition is advantageous in that it is environment-friendly and does not poison workers with organic substances.
  • a hydrocarbon solvent composition according to the present invention comprises a C 6-7 hydrocarbon mixture, and comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-70 parts by weight of paraffin, 25-85 parts by weight of a naphthene compound, less than 1.0 part by weight of n-hexane and less than 0.1 part by weight of an aromatic compound.
  • the hydrocarbon solvent composition according to the present invention comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-80 parts by weight of C 6 hydrocarbon and 10-80 parts by weight of C 7 hydrocarbon.
  • the hydrocarbon solvent composition has an initial boiling point of higher than 60 ° C , a dry point of lower than 105 ° C and an aniline point of lower than 70 ° C .
  • the hydrocarbon solvent composition can be obtained by subjecting a hydrocarbon fraction produced in a petrochemical process to an adsorption/desorption process in an SMB (simulating moving bed), a hydrogenation process and a distillation process.
  • the inventive composition can be produced by removing n-hexane and n-heptane from a hydrocarbon feedstock produced in petroleum refining processes, using the adsorption/desorption principle, and removing aromatic components from the feedstock through a hydrogenation process.
  • hydrocarbon feedstock may include a C 6-7 fraction obtained by the fractional distillation of a naphtha fraction produced in crude oil refining, or a C 6-7 fraction obtained by the fractional distillation of a raffinate fraction remaining after the extraction of aromatic components in a sulfolane extraction process, but the present invention is not specifically limited thereto.
  • the removal of n-hexane is preferably carried out by continuously removing only n-hexane through alternative operation of a plurality of valves on the basis of adsorption/desorption using an adsorbent (e.g., molecular sieve) in the SMB process.
  • an adsorbent e.g., molecular sieve
  • a feedstock subjected to fractional distillation and hydrogenation processes is a non-aromatic fraction containing 6-7 carbon atoms. This fraction is introduced into an SMB system without a pretreatment process.
  • the SMB system consists of 20 adsorbent beds filled with an adsorbent, and 80 on-off valves.
  • the introduced fraction is passed through an adsorption zone while only the n-paraffin component thereof is adsorbed by the adsorbent.
  • the adsorbed n-paraffin is desorbed by desorbent n- pentane and sent to an extract column, in which the desorbent is recovered as an overhead fraction, and the n-paraffin is separated as a bottom fraction.
  • the fraction that was not adsorbed in the adsorption zone, and from which the n-paraffin component was removed, is sent through a pressure control valve to a 35-stage packed column, in which the desorbent is recovered as an overhead fraction, and the fraction from which the n-paraffin was removed is separated as a bottom fraction.
  • aromatic compounds such as benzene and toluene can be converted into naphthene compounds through a hydrogenation process.
  • a fraction from which aromatic components were removed can be obtained through a continuous reaction using a pilot-scale continuous reactor and an HTC catalyst.
  • the reacted fraction is subjected to GC to confirm that it contains no aromatic component.
  • Experimental conditions are as follows: catalyst charge amount: 180 cc; inlet temperature: 40 ° C; reaction temperature: 100-110 ° C; pressure: 25 kg/cm 2 g; feed flow rate: 50 cc/hr; and H 2 flow rate: 80 NL/hr.
  • the hydrocarbon solvent composition of the present invention has reduced amounts of n-hexane and aromatic components and comprises a C 6-7 hydrocarbon mixture as a main component.
  • the hydrocarbon solvent composition comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-70 parts by weight of paraffin, 25-85 parts by weight of a naphthene compound, less than 1 part by weight of n-hexane and less than 0.1 parts by weight of an aromatic compound.
  • the hydrocarbon solvent composition comprises, based on 100 parts by weight of the solvent composition, 10-80 parts by weight of C 6 hydrocarbon and 10-80 parts by weight of C 7 hydrocarbon.
  • the hydrocarbon solvent composition has an initial boiling point of higher than 60 ° C, a dry point of lower than 105 ° C and an aniline point of lower than 70 ° C. More preferably, the hydrocarbon solvent composition has distillation properties, including an initial boiling point of 75-85 ° C , a dry point of 90- 100 ° C and an aniline point of 60-70 ° C .
  • This solvent composition is characterized in that it boils within a narrow temperature range and has a fast evaporation rate due to the large amount of light components.
  • the aniline point can be used as an indirect index of the ability to dissolve resin, by which measure the solvent composition has suitable dissolving capability, so mat it can remove organic contaminants in a cleaning process without influencing resin material.
  • the solvent composition contains no n-hexane and aromatic component, and thus entails reduced human health risks when workers are exposed to the solvent.
  • the hydrocarbon solvent composition according to the present invention as described above has advantages in that it can be used as a cleaner and/or a paint/adhesive solvent due to its suitable dissolving ability and fast drying properties, and it will have reduced human health risks, when workers are exposed to the solvent.
  • an environment-fiiendly hydrocarbon solvent reducing human health risks can be provided by removing or reducing n- hexane and aromatic components.
  • the fraction remaining after extracting aromatic components in a sulfolane extraction process was subjected to fractional distillation in a 30-stage packed column to obtain a C 6-7 fraction.
  • the obtained fraction was subjected to a hydrogenation process using a catalyst in a continuous reaction to convert aromatic components into naphthene components, and was passed through an adsorbent to selectively remove only an n-paraffin component.
  • n-hexane which has been frequently used in the prior art, there are shortcomings in that it rapidly evaporates in damp weather conditions due to excessively fast drying properties, to thus form water drops on the surface as a result of a decrease in temperature, thus staining the surface, and particularly, it has an n-hexane content of 64%, which is hazardous to workers.
  • product B In the case of product B, it has suitable dissolving ability, but has a shortcoming in that it has a slow drying rate, leading to a decrease in processing rate. In addition, although product B has a reduced n-hexane content, it still has an n-hexane content of about 10% and an aromatic content of 4%, suggesting that it does not satisfy the environmental requirement. In the case of product C, it can undergo evaporation loss during storage because it evaporates in a wide temperature range, and has slow drying properties. Although product C has no aromatic component, it has a high n-hexane content of 13%, and thus it does not satisfy the environmental requirement.
  • the composition according to the present invention (Example 1) can satisfy all the requirements. It has suitable dissolving ability, as can be seen by the aniline point. Also, it has a suitable evaporation rate, and thus does not cause a phenomenon in which water drops are formed due to fast drying. Also, it has drying properties that match cleaning processing speed. Thus, the inventive composition has excellent performance compared to other products. In addition, it has no aromatic components, and has an n-hexane content of less than 1%, suggesting that it does not degrade the environment of workers.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Detergent Compositions (AREA)

Abstract

Disclosed herein is an environment-friendly hydrocarbon solvent composition containing substantially no n-hexane. The hydrocarbon solvent composition comprises C6-7 paraffin and naphthene as main components, and contains substantially no aromatic component and n-hexane. The hydrocarbon solvent has an initial boiling point of higher than 60 °C, a dry point of lower than 105 °C , and an aniline point of lower than 70 °C .

Description

[DESCRIPTION]
[Invention Title]
ENVIRONMENT-FRIENDLY HYDROCARBON SOLVENT COMPOSITION REMOVED NORMAL HEXANE
[Technical Field]
CROSS REFERENCE TO RELATED APPLICATION(S)
This application claims the benefit of Korean Patent Application No. l 0-2005-0118180. filed December 6, 2005, entitled "Environment-friendly hydrocarbon solvent composition removed normal hexane".
The present invention relates to an industrial solvent for use as an industrial cleaning solvent, a solvent for adhesives and tapes, and a solvent for drug reactions. More particularly, the present invention relates to an industrial solvent composition, which contains little or no aromatic component and n-hexane, which are hazardous to human health.
[Background Art]
Prior industrial cleaning solvents, particularly n-hexane solvents for electronic cleaning applications, are compositions characterized by an n-hexane content of more than 60%, distillation properties such as an initial boiling point of higher than 65 °C, a dry point of lower than 70 °C and an aniline point of lower than 70 °C . Such n-hexane solvents can be produced by the hydrotreating and fractional distillation of fractions produced in petrochemical processes and oil-refining processes. Such n-hexane solvents have been widely used for the cleaning of electronic devices and electronic parts due to their suitable dissolving ability and fast drying properties.
Also, naphthene petroleum solvents are used as, for example, metal processing oils, ink solvents and cleaning solvents. Moreover, straight-chain paraffin is widely used as a raw material for, for example, soft alkylbenzene, chlorinated paraffin or α -olefin, and the demand therefor has recently increased. Herein, the naphthene petroleum solvents are frequently produced by the hydrogenation of petroleum fractions, but if hydrogenation is not sufficiently performed, the resulting petroleum solvents will contain a large amount of aromatic hydrocarbons. If the petroleum solvents contain aromatic hydrocarbons, for example, alkylbenzenes, they will cause offensive odors, and thus worsen a working environment.
In connection with this problem, Japanese Patent Laid-Open Publication No. Hei 2- 67396 discloses a method of producing a hydrocarbon solvent having an aromatic content of less than 2 wt% by hydrogenating a petroleum fraction and then removing n-paraffin from the hydrogenated fraction. Specifically, the n-paraffin removal method disclosed in the patent document is a reaction for removing n-paraffin from the hydrogenated product using a zeolite catalyst. However, because this reaction removes n-paraffin by the decomposition or isomerization of n-paraffin, it has a disadvantage in that the yield of n-paraffin is reduced, even though a low-aromatic hydrocarbon solvent is obtained.
Also, Japanese Patent Laid-Open Publication No. Sho 63-15889 discloses a method of producing a hydrocarbon solvent containing a given amount of aromatic hydrocarbon by carrying out the nuclear hydrogenation of a kerosene fraction and then removing n-paraffin from the hydrogenated product. However, this method has a shortcoming in mat the efficiency of the n- paraffin removal process is low due to insufficient desulfurization. In addition, even when a hydrogenation reaction is carried out in order to further reduce the aromatic content of the hydrocarbon solvent, which contains a given amount of aromatic hydrocarbon, obtained in this method, there is a shortcoming in that the remaining sulfur, resulting from insufficient desulfurization, acts as a catalyst poison, which reduces the life of the catalyst for the hydrogenation reaction.
Meanwhile, in the industrial fields of adhesives and tapes, Fractionated petroleum solvents are sometimes used, and are a composition having an aromatic content of more than 5%, a n-hexane content of more than 10%, and distillation properties such as an initial boiling point of higher than 35 "C and a dry point of lower than 140 "C . This solvent can be produced by the fractional distillation of fractions produced in petrochemical processes and oil refining processes.
However, there are reports that, when workers are exposed to an excess amount of n- hexane, polyneuropathy can occur in the workers. Thus, the Threshold Limit Value (Time Weighted Average) of n-hexane is strictly regulated to a value of 50 ppm. Moreover, although aromatic compounds such as benzene are classified as carcinogenic substances, workers have a high possibility of being exposed to hazardous substances such as aromatic substances and n- hexane due to the characteristics of the industrial field. For this reason, there is a need for a solvent that contains little or no aromatic substance and n-hexane, and thus the present invention has been made.
[Disclosure]
[Technical Problem]
The present invention has been made to solve the problems with the prior hydrocarbon solvents, and it is an object of the present invention to provide a non-aromatic, low-n-hexane, industrial solvent composition having reduced human health risks.
[Advantageous Effects]
A hydrocarbon solvent composition according to the present invention contains a significantly reduced amount of n-hexane and aromatic contents, unlike the prior solvent compositions, and thus has reduced human health risks. Accordingly, the inventive hydrocarbon solvent composition is advantageous in that it is environment-friendly and does not poison workers with organic substances.
[Best Mode]
A hydrocarbon solvent composition according to the present invention comprises a C6-7 hydrocarbon mixture, and comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-70 parts by weight of paraffin, 25-85 parts by weight of a naphthene compound, less than 1.0 part by weight of n-hexane and less than 0.1 part by weight of an aromatic compound.
Preferably, the hydrocarbon solvent composition according to the present invention comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-80 parts by weight of C6 hydrocarbon and 10-80 parts by weight of C7 hydrocarbon.
Preferably, the hydrocarbon solvent composition has an initial boiling point of higher than 60 °C , a dry point of lower than 105 °C and an aniline point of lower than 70 °C .
According to one preferred embodiment of the present invention, the hydrocarbon solvent composition can be obtained by subjecting a hydrocarbon fraction produced in a petrochemical process to an adsorption/desorption process in an SMB (simulating moving bed), a hydrogenation process and a distillation process.
Hereinafter, the present invention will be described in further detail.
According to one preferred embodiment of the present invention, the inventive composition can be produced by removing n-hexane and n-heptane from a hydrocarbon feedstock produced in petroleum refining processes, using the adsorption/desorption principle, and removing aromatic components from the feedstock through a hydrogenation process.
Particular examples of the hydrocarbon feedstock may include a C6-7 fraction obtained by the fractional distillation of a naphtha fraction produced in crude oil refining, or a C6-7 fraction obtained by the fractional distillation of a raffinate fraction remaining after the extraction of aromatic components in a sulfolane extraction process, but the present invention is not specifically limited thereto.
Generally, when a hydrocarbon fraction having C6 components is produced by reducing n-hexane through a distillation process, there are shortcomings in that a distillation column having a high theoretical plate number should be used because the components of the feedstock have similar boiling points, and in that the production yield is low, leading to low efficiency and high cost.
For this reason, the removal of n-hexane is preferably carried out by continuously removing only n-hexane through alternative operation of a plurality of valves on the basis of adsorption/desorption using an adsorbent (e.g., molecular sieve) in the SMB process.
A method of continuously separating only n-hexane from a hydrocarbon feedstock using the SMB process will now be described by way of example, but it is of note that the present invention is not specifically limited thereto.
As a naphtha fraction produced in an oil refining process, a feedstock subjected to fractional distillation and hydrogenation processes is a non-aromatic fraction containing 6-7 carbon atoms. This fraction is introduced into an SMB system without a pretreatment process.
The SMB system consists of 20 adsorbent beds filled with an adsorbent, and 80 on-off valves.
The introduced fraction is passed through an adsorption zone while only the n-paraffin component thereof is adsorbed by the adsorbent. The adsorbed n-paraffin is desorbed by desorbent n- pentane and sent to an extract column, in which the desorbent is recovered as an overhead fraction, and the n-paraffin is separated as a bottom fraction. The fraction that was not adsorbed in the adsorption zone, and from which the n-paraffin component was removed, is sent through a pressure control valve to a 35-stage packed column, in which the desorbent is recovered as an overhead fraction, and the fraction from which the n-paraffin was removed is separated as a bottom fraction.
Meanwhile, aromatic compounds such as benzene and toluene can be converted into naphthene compounds through a hydrogenation process.
The method of removing aromatic components from a hydrocarbon feedstock through the hydrogenation process will now be described by way of example, but it is of note that the present invention is not limited thereto. A fraction from which aromatic components were removed can be obtained through a continuous reaction using a pilot-scale continuous reactor and an HTC catalyst. The reacted fraction is subjected to GC to confirm that it contains no aromatic component. Experimental conditions are as follows: catalyst charge amount: 180 cc; inlet temperature: 40 °C; reaction temperature: 100-110 °C; pressure: 25 kg/cm2g; feed flow rate: 50 cc/hr; and H2 flow rate: 80 NL/hr.
According to the preferred embodiments described above, the hydrocarbon solvent composition of the present invention has reduced amounts of n-hexane and aromatic components and comprises a C6-7 hydrocarbon mixture as a main component.
Particularly, the hydrocarbon solvent composition comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-70 parts by weight of paraffin, 25-85 parts by weight of a naphthene compound, less than 1 part by weight of n-hexane and less than 0.1 parts by weight of an aromatic compound.
Preferably, the hydrocarbon solvent composition comprises, based on 100 parts by weight of the solvent composition, 10-80 parts by weight of C6 hydrocarbon and 10-80 parts by weight of C7 hydrocarbon.
Preferably, the hydrocarbon solvent composition has an initial boiling point of higher than 60 °C, a dry point of lower than 105 °C and an aniline point of lower than 70 °C. More preferably, the hydrocarbon solvent composition has distillation properties, including an initial boiling point of 75-85 °C , a dry point of 90- 100 °C and an aniline point of 60-70 °C .
This solvent composition is characterized in that it boils within a narrow temperature range and has a fast evaporation rate due to the large amount of light components. Meanwhile, the aniline point can be used as an indirect index of the ability to dissolve resin, by which measure the solvent composition has suitable dissolving capability, so mat it can remove organic contaminants in a cleaning process without influencing resin material. In particular, the solvent composition contains no n-hexane and aromatic component, and thus entails reduced human health risks when workers are exposed to the solvent.
The hydrocarbon solvent composition according to the present invention as described above has advantages in that it can be used as a cleaner and/or a paint/adhesive solvent due to its suitable dissolving ability and fast drying properties, and it will have reduced human health risks, when workers are exposed to the solvent.
As described above, according to the present invention, an environment-fiiendly hydrocarbon solvent reducing human health risks can be provided by removing or reducing n- hexane and aromatic components.
[Mode for Invention]
The results of analysis of the properties and components of the composition thus produced can be obtained through the following examples. It is to be understood, however, that these examples are for illustrative purposes only and the scope of the present invention is not limited thereto.
Example 1
To obtain the composition shown in Table 1 below, the fraction remaining after extracting aromatic components in a sulfolane extraction process was subjected to fractional distillation in a 30-stage packed column to obtain a C6-7 fraction. The obtained fraction was subjected to a hydrogenation process using a catalyst in a continuous reaction to convert aromatic components into naphthene components, and was passed through an adsorbent to selectively remove only an n-paraffin component.
[Table 1]
Composition of fraction
Figure imgf000008_0001
Figure imgf000009_0001
[Table 2]
Results of properties
Figure imgf000009_0002
Comparative Examples 1-3
The properties of cleaners, which are currently used for mobile cases, are shown in Table 3 below.
[Table 3]
Properties of cleaners currently used for mobile cases
Figure imgf000009_0003
Mobile phone manufacturers require a hydrocarbon cleaner satisfying the following requirements: having suitable dissolving ability and drying properties, and containing no aromatic component such as benzene as a carcinogenic substance, and n-hexane, which causes central nervous system damage, in consideration of workers. Cleaners that are currently used do not satisfy these requirements. In the case of n-hexane, which has been frequently used in the prior art, there are shortcomings in that it rapidly evaporates in damp weather conditions due to excessively fast drying properties, to thus form water drops on the surface as a result of a decrease in temperature, thus staining the surface, and particularly, it has an n-hexane content of 64%, which is hazardous to workers. In the case of product B, it has suitable dissolving ability, but has a shortcoming in that it has a slow drying rate, leading to a decrease in processing rate. In addition, although product B has a reduced n-hexane content, it still has an n-hexane content of about 10% and an aromatic content of 4%, suggesting that it does not satisfy the environmental requirement. In the case of product C, it can undergo evaporation loss during storage because it evaporates in a wide temperature range, and has slow drying properties. Although product C has no aromatic component, it has a high n-hexane content of 13%, and thus it does not satisfy the environmental requirement.
On the other hand, the composition according to the present invention (Example 1) can satisfy all the requirements. It has suitable dissolving ability, as can be seen by the aniline point. Also, it has a suitable evaporation rate, and thus does not cause a phenomenon in which water drops are formed due to fast drying. Also, it has drying properties that match cleaning processing speed. Thus, the inventive composition has excellent performance compared to other products. In addition, it has no aromatic components, and has an n-hexane content of less than 1%, suggesting that it does not degrade the environment of workers.
Although the present invention has been described in detail with reference to specific embodiments, those skilled in the art will appreciate that these embodiments are for illustrative purposes only, that the hydrocarbon solvent composition according to the present invention is not limited thereto, and that those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

[CLAIMS]
[Claim 1]
A hydrocarbon solvent composition including a C6-7 hydrocarbon mixture, comprising, based on 100 parts by weight of the hydrocarbon solvent component, 10-70 parts by weight of paraffin, 25-85 parts by weight of a naphthene compound, less than 1.0 part by weight of n- hexane and less than 0.1 part by weight of an aromatic compound.
[Claim 2]
The hydrocarbon solvent composition of Claim 1, which comprises, based on 100 parts by weight of the hydrocarbon solvent composition, 10-80 parts by weight of C6 hydrocarbon and 10-80 parts by weight of C7 hydrocarbon.
[Claim 3]
The hydrocarbon solvent composition of Claim 1, which has an initial boiling point of higher than 60 "C , a dry point of lower than 105 °C and an aniline point of lower than 70 °C .
[Claim 4]
The hydrocarbon solvent composition of Claim 1, which is obtained by subjecting a hydrocarbon fraction, produced in a petrochemical process, to an adsorption/desorption process in an SMB (simulating moving bed), a hydrogenation process, and a distillation process.
PCT/KR2006/004980 2005-12-06 2006-11-24 Environment-friendly hydrocarbon solvent composition removed normal hexane WO2007066915A1 (en)

Applications Claiming Priority (2)

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KR1020050118180A KR101192057B1 (en) 2005-12-06 2005-12-06 Environment-friendly Hydrocarbon Solvent Composition Removed Normal Hexane
KR10-2005-0118180 2005-12-06

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KR102692262B1 (en) * 2019-06-03 2024-08-07 에스케이이노베이션 주식회사 Hydrocarbon solvent composition
KR102193379B1 (en) * 2019-10-08 2020-12-21 에스케이이노베이션 주식회사 Hydrocarbon solvent composition comprising normal heptane, method of preparing the same, and method of preparing conjugated diene polyer

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