WO2020065681A1

WO2020065681A1 - An additives composition for natural hydrocarbon-based fuels

Info

Publication number: WO2020065681A1
Application number: PCT/IN2019/050717
Authority: WO
Inventors: Ipsita N. PANDYA
Original assignee: Auto Lng Cryo Solution Llp
Priority date: 2018-09-28
Filing date: 2019-09-28
Publication date: 2020-04-02

Abstract

An additives composition for natural hydrocarbon-based fuels comprises at least one C₁-C₉ alcohol, C₃-C₁₂ alkanes, and catalyst. The present invention also discloses composition wherein 5 to 40 percent by weight of C₁-C₉ alcohol, 10 to 70 percent by weight of C₃-C₁₂ alkanes; catalyst for additives is 1 to 10 presents by weight and 5 to 20 percent by weight of cycloalkanes. The present invention relates to additives composition for natural hydrocarbon-based fuels further discloses method of fuel formation and use of fuel composition thereof.

Description

TITLE: AN ADDITIVES COMPOSITION FOR NATURAL HYDROCARBON-BASED FUELS

FIELD OF THE INVENTION

The invention relates to improved additives composition for natural hydrocarbon-based fuels, fuel formulations, method of production and use. More specifically, the invention is directed to fuel additives compositions, compounds, materials and processes for improving the cutting properties and characteristics of fuels so as to reduce undesirable polluting emissions produced during burning. The present invention also relates to natural hydrocarbon-based compositions comprising base gas as methane and additives for use in cutting and/or welding. BACKGROUND OF THE INVENTION

The present invention relates generally to composition and method for improving properties during cutting and reduces emission. With the rapid development of industry, the demand for gas for cutting metal is growing. Currently, oxygen and acetylene are widely used in oxy-fuel cutting. For torch with acetylene as heating source, it has the benefits of high flame temperature and significant thermal processing effect. Thus, it is widely used in metal cutting, metal welding, deformation correction, etc. Therefore principal torch gas used has been acetylene, which is expensive, difficult to store, transport and requires the use of almost pure oxygen for cutting ferrous metals and forms persistently adherent slag. Moreover, acetylene is disadvantageous due to poor security, high-energy consumption, high price, environmental pollution, etc. Backfiring tendency is another problem often faced while using oxyacetylene flame. As acetylene explodes when subjected to very high pressures, oxyacetylene flame cannot be used under deep water at depths greater than 20 feet under water. A number of attempts have been made to improve torch gas used in cutting and/or welding torches by adding an additive or additives to them.

Currently, the main gas metal welding is oxygen acetylene gas. Since the beginning of its use that is made a great contribution to industrial progress and technological innovation. However, since the explosive acetylene gas, low safety factor, the production process energy consumption, environmental pollution, high production costs. So, there are many defects and hazards in the production, storage, transportation, use, environmental protection and price development has been extremely limited. Thus there has been some alternative to acetylene cutting gas, such as "natural gas", "propylene gas", "LPG" and so on. However, this alternative body and the acetylene gas with more or less compared to the temperature of insufficient cutting, poor cutting quality, defects such as incomplete combustion and need to grind for the finishing. In recent years, metal cutting industry is looking for alternatives such as propane, natural gas, LPG (liquefied petroleum gas), etc. Natural gas has features of high explosion limit, easy to propagate after leaking and is safer than propane and LPG. Natural gas can be safely used in a closed room in shipbuilding industry and has a lower price than propane. However, natural gas for cutting metal has disadvantages of long time to warm for piercing, slow cutting speed, low flame temperature, poor performance, and high- energy consumption. It is often that additives are added to natural gas.

US Patent application No. US20160097012A1 discloses use of natural gas additive comprising alcohol, toluene, xylene, trimethylbenzene in an amount of 20-90 wt. %.

Chinese Patent CN105176611A uses natural gas and an additive, wherein: the additive consists of p-xylene, ethylbenzene, meta-xylene and ferrocene composition. Chinese Patent CN104877722A uses natural gas, and an additive, wherein: the additive consists benzhydrol, cyclohexanol of n-propyl, tert-butyl methyl ether, methanol, ethanol, and gasoline components

However, most additives are corrosive and these additives are hydrogen peroxide, potassium permanganate, water, potassium hydroxide, hydrofluoric acid, perchloric acid, and hydrochloric acid. In long-term use, it will corrode cylinders, pipe walls and thus there is a great security risk. Some additives are viscous liquid, gum, or solid such as nano-alumina, iron oxide nanoparticles, naphthenate (manganese, cerium, cobalt, zirconium, copper, Lanthanum, etc.), alkyl sulfonate, methenamine and Tween-80, etc. They cannot be completely dissolved in natural gas. Gas with liquid may damage rubber membranes of pressure reduction valves in pipes. Thus, additives containing viscous liquid or gum that is insoluble in liquid are not appropriate for long-term use. Ferrocene is also used as additive. Ferrocene is a solid. Ferrocene is required to dissolve in solvent prior to be used as additive. This additive is added to natural gas pipes and ferrocene becomes solid particles floating in natural gas after a period of time. The solid ferrocene particles may clog a torch, make cutting torch instable, and even cut off the torch. The additives like toluene, xylene, trimethylbenzene are toxic, viscous and insoluble. Further, conventional additives have poor performance.

Additionally, these additives do not yield sufficient combustibility to overcome the deleterious by-products such as carbon monoxide and the like. Further natural gas, generated torch / flame only reaches propane flame temperature (£2700°C) and cannot reach acetylene flame temperature (3l00°C). Generally the prior art combustion adding an additive mixed with a certain proportion of gas, coupled with special cutting nozzle, thereby increasing the flame temperature of the gas. However, the conventional combustion additives are unstable, and therefore, an urgent need to develop a new type of additive composition for natural gas which can be used for metal cutting metal cutting gas, in order to meet industry’s needs. In view of the aforementioned attempts and their limitations, the present invention discloses and claim improved additive composition for natural- hydrocarbon fuel compositions, which increases flame temperature, and reduce consumption of expensive fuel or oxygen.

OBJECTIVES OF THE INVENTION

The primary object of the present invention is to provide an improved additives composition for natural hydrocarbon-based fuels so as to have characteristics superior to that of acetylene, LPG and Propane for cutting and/or welding/brazing applications.

Another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels comprising C₁-C₉ alcohol; C₃-C₁₂ alkanes; cycloalkanes and catalyst.

Another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels with high flame temperature to kindle the base metal rapidly.

Yet another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels for cutting and/or welding applications, which can combine effectively with commercial oxygen.

Still another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels, which is readily available, economical, and safe gas, which is easy to enhance its attributes.

A further object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels enabling ferrous metal to be cut economically, faster, cleaner and safely. Another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels, which can be used by existing torches for cutting or welding under water at considerable depths.

Yet another object of the present invention is to provide improved additives composition for natural hydrocarbon-based fuels to reduce the consumption of fuel used for cutting and/or welding applications.

BRIEF DESCRIPTION OF FIGURES.

The invention will be better understood and the above objects as well as objects other than those set forth above will become more apparent after a study of the following detailed description thereof. Such description makes reference to the annexed figures wherein:

(Figure to be placed at appropriate place in description.)

Figure 1 : - acetylene cut

Figure 2: - Pure cut with natural gas with additive

Figure 3: - left side cut is of LPG and right-side cut is with natural gas (NG) with additives.

Figure 4: - It shows the cut finish with natural gas with additives eliminates requirement of grinding. Because grinding has its own problems regarding safety and environment.

DETAILED DESCRIPTION OF THE INVENTION

The following description and examples illustrate certain embodiments of the present invention and include a preferred embodiment for each of the various types of fuel additives, formulations and processes. It will be recognized by those of skill in the art that variations and modifications of the disclosed invention are possible, and accordingly, the description of the embodiments should not be view to limit the scope of the invention. The present invention provides improved additives composition for natural hydrocarbon-based fuels. The improved additives composition which enhance the combustion characteristics of natural hydrocarbon-based fuels, and thus improve emissions characteristics of burnt fuels, are enhanced by including certain groups of molecular structures that have structural parameters hereto not realized as especially useful. In particular improved additives composition for natural hydrocarbon-based fuels comprises molecules selected form group C1-C9 alcohol, C3-C12 alkanes, cycloalkanes and catalyst provide improved combustion characteristics. Such molecules when added in the parts per million to parts per thousand range having the aforementioned characteristics often show improved combustion characteristics when formulated into a natural hydrocarbon-based fuels.

Oxy-fuel process is the most applied industrial thermal cutting process for cutting several metals. It can cut thickness from 0.5 mm to 1000 mm or more, the equipment required is low cost and can be used manually or mechanized. The present invention provide an improved additives composition for natural hydrocarbon-based fuels for Oxy-fuel process wherein the mixture of oxygen and a natural hydrocarbon-based fuels are Natural gas, compressed Natural gas, liquefied natural gas. Oxy-fuel process cuts metals by means of the chemical reaction of oxygen with the base metal at elevated temperature. Oxyfuel is used to preheat the metal to its 'ignition' temperature (for steel, it is 700-900°C) which is well below its melting point. A jet of pure oxygen is then directed into the preheated area initiating a vigorous exothermic chemical reaction between the oxygen and the metal to form metal oxide or slag. The oxygen jet blows away the slag enabling the jet of oxygen to pierce through the material and continue to cut through the material. The present invention provide an improved additives composition for natural hydrocarbon-based fuels and due to its high flame temperature and cutting speed, it can be used for cutting and welding purposes by metal fabricators. Further, present invention provide an improved additive composition, which has the higher BTU and the greatest combustion velocity. The improved additives composition and natural hydrocarbon-based fuels rapidly heats the base metal up to the kindling point.

Natural hydrocarbon-based fuels are Natural gas (NG). The present invention improved additives composition is for Natural gas (NG). Natural gas (NG) is easily available at a low cost compared to other fuels such as LPG, Propane, and acetylene. Natural gas (NG) is mainly a mixture of Ci - C₄ hydrocarbons, (substantially Methane). However, depending on the source of Natural gas (NG), the same may contain Ethane, Propane, Butane, Propylene, Isobutene, and Pentane.

It has now been found that addition of composition of additive mixture to the Natural hydrocarbon-based fuels not only substantially enhances the flame temperature and improves cutting speed and quality, but also decreases the fuel and oxygen consumption in cutting or welding applications.

The additives composition for natural hydrocarbon-based fuels comprises Ci- C₉ alcohol, C3-C12 alkanes, cycloalkanes and catalyst.

In another embodiment of the invention, additives composition for natural hydrocarbon-based fuels comprises 5 wt. % to 40 wt. % C1-C9 alcohols, 10 wt. % to 70 wt. % C3-C12 alkanes, and 5 wt. % 20 wt. % cycloalkanes, 1 wt. % 10 wt. % catalyst selected form 2-methyl-2-Propanethiol and / or Methyl Ethyl Sulfide and mixtures thereof. Further, optionally other additives are higher Octane fuels, Allyl alcohol, and glycol.

The C1-C9 alcohol are linear or cyclic, saturated or unsaturated alcohols are selected form n-butyl alcohol, sec-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, l-pentanol, 2-pentanol, 1 -ethyl- 1 -propanol, 2-methyl- 1 -butanol, 3- methyl-l -butanol, 3-methyl-2-butanol, neopentyl alcohol, l-hexanol, 2- methyl- l-pentanol, 4-methyl-2-pentanol, 2-ethyl- 1 -butanol, l-heptanol, 2- heptanol, 3-heptanol, l-octanol, 2-octanol, 2-ethyl- l-hexanol, l-nonanol, 3,5,5-trimethyl-l-hexanol, l-decanol, l-undecanol, l-dodecanol, cyclohexanol, l-methylcyclohexanol, 2-methylcyclohexanol, 3- methylcyclohexanol, 4-methylcyclohexanol, a-terpineol, 2,6-dimethyl-4- heptanol, nonyl alcohol or tetradecyl alcohol or mixtures thereof.

Preferably, the -Cg alcohol is selected form methanol, ethanol, isopropanol butanol or mixtures thereof.

C₃-C₁₂ alkanes are linear or branched alkanes are:

Alkanes with 3 carbon atoms: n-propane, Alkanes with 4 carbon atoms: n- butane, 2-methylpropane (iso-butane). Alkanes with 5 carbon atoms: n- pentane, 2-methylbutane. Alkanes with 6 carbon atoms: n-hexane, 2- methylpentane, 3-methylpentane, 2, 2-dimethylbutane, 2, 3-dimethylbutane. Alkanes with 7 carbon atoms: n-heptane, 2-methylhexane, 3-methylhexane, 2,

2-dimethylpentane, 2, 3-dimethyl- pentane, 2, 4-dimethylpentane, 3, 3- dimethylpentane, 3 -ethyl pentane, 2, 2, 3 -trimethyl- butane. Alkanes with 8 carbon atoms: n-octane, methylheptanes, e.g. 2-methylheptane, dimethyhexanes, e.g. 2,2- dimethylhex- ane, ethylhexanes, e.g. 2-ethylhexane, trimethylpentanes, e.g. 2,2,3- trimethylpentane, methylethylpentanes, e.g. 2- methyl-3 -ethyl -pentane. Alkanes with 9 carbon atoms: n-nonane, methyloctanes, e.g. 2-methyloktane, dimethylheptanes, e.g. 2,3- dimethylhep- tane, ethylheptanes, e.g. 2-ethylheptane, methylethylhexanes, e.g. 2- methyl-

3- ethylhexane, diethylpentanes, e.g. 3,3-diethylpentane. Alkanes with 10 carbon atoms: n-decane, methylnonanes, e.g. 2-methylnonane, dimethyloktanes, e.g. 2,3- dimethyloktane, methylethylheptanes, e.g. 2- methyl-3-ethylheptane, propylhexanes, e.g. 2-propylhexane, isopropyl hexanes, e.g. 2-isopropylhexane, methylpropylpentanes, e.g. 2-propyl-4- methylpentane and 2-propyl-5-methylpentane. Alkanes with 11 carbon atoms: n-undecane, iso-undecanes. Preferably, the C3-C12 alkanes compound is one of n-butane, i-butane, 2- Methyl-Butane, 2,2 Dimethyl Butane, 2,3-dimethyl butane, Neo-Pentane, N Pentane, l-Pentene, 3-Methyl Pentane, 2-Methyl Pentane, 2,3-Dimethyl Pentane, 3-Methyl Hexane, 2,2,4 -Trimethyl Pentane, 2,5-Dimethyl Hexane, 2,4-Dimethyl Hexane, 2,3,4-Trimethyl Pentane, 2,3,3-Trimethl Pentane, N- Hexane, 2,3-Dimethyl Hexane, heptane, octane, and a combination thereof.

Preferably, the alicyclic compound is one of monocyclic cycloalkanes: cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, norbomadiene. Cyclopentane, and a combination thereof.

Further catalysts for additives are selected from 2-methyl-2-Propanethiol, and Methyl Ethyl Sulfide or mixture thereof.

The other additives are optionally selected form the group of additives higher Octane fuels are selected from the group consisting of paraffins, olefinic, acetylenes hydrocarbons, aromatic hydrocarbons and mixtures thereof; vinyl carbinol or carbinol derivatives; Allyl alcohol and glycol can also be selected from a group consisting of polybutylene glycol, polyethylene glycol, polypropylene glycol and mixtures thereof.

The present invention provides improved additives composition is added to Liquefied Natural Gas (LNG) or Regasified-LNG at different pressure and packaging levels. This improves the cutting property.

The present invention the method of preparing improved additives composition for natural hydrocarbon-based fuels wherein improved additives composition and propylene are mixed with R-LNG. The master batch prepare in 50 liter cylinder and from that other 21 cylinder in skids by adding very few quantity of improved additives composition from master cylinder and then pressurize it till 150 to 200 bar pressure. The master cylinder will have pressure up to 200 bar, for blending at lower pressure.

The additive of the invention can be added to the pipes for supplying natural gas and natural gas cylinders at elevated pressure in order to cater to non- piped users, and can be added to pipes for conveying liquefied natural gas, which is used for cutting or welding. The present invention provide an improved additives composition for natural hydrocarbon-based fuels as metal cutting gas which is filled in compressed gas cylinders. This is a gas, which has more stability to cut metals more efficiently. This metal cutting gas can cut carbon steel and mild steel metal. The gas is safe for cutting metal, as it has no backfire possibility.

The natural hydrocarbon-based fuels or gas contains improved additives composition that has flame enhancing property, some known amount of propylene is added to it. The present invention improved additives composition and natural hydrocarbon-based fuels as compared to LPG and acetylene is the best gas to cut metals. As acetylene was a favorable for metal cutting and heating characteristics because it has high concentration of heat, temperature and flame emissivity, as well as reduced consumption of oxygen necessary to flame. Consequently, it provides a desirable performance when compared to other available fuel gasses.

The present invention improved additives composition and natural hydrocarbon-based fuels are less expensive, safe and has less consumption of oxygen as compared to LPG a petroleum based liquefied gas and acetylene. Further LPG and acetylene requires high consumption of oxygen to produce flame, it does not give desirable result, and it is not safe to use LPG and acetylene. In addition, LPG and acetylene are not as safe as LNG and NG gas cutting mixture.

The present invention improved additives composition and natural hydrocarbon-based fuels as cutting fuel has improve the flame property by reduced consumption of oxygen and improves the flame property.

The present invention improved additives composition for natural

hydrocarbon-based fuels has following advantages:

1) Cutting flame is sharp.

2) Cutting efficiency is high.

3) Slag formation is reduced

4) Cutting surface is smooth and reduces/eliminates grinding.

5) Lower consumption of oxygen

6) More safe product for cutting

7) Low consumption of fuel gas.

8) Recovery from parent metal is higher

9) Emission of gases is reduced drastically.

In accordance with present invention additives composition for natural hydrocarbon-based fuels wherein natural gas additives composition does not corrode steel and can be used for a long time. The additive of the invention can be added to the pipes for conveying natural gas and natural gas cylinders, and can be added to pipes for conveying liquefied natural gas which is used for cutting or welding.

The additive of the invention has no solid particles in room temperature and can be dissolved in natural gas. It does not damage rubber membranes of pressure reduction valves in pipes. It is stable in nature.

The natural gas additive of the invention can increase flame temperature to 3000-3500° C. in cutting operation. It greatly improves the performance. It’s preheat piercing time is short, its cutting speed is quick, and its uses are wide. The natural gas additive of the invention can be widely used for cutting steel plate and sections such as carbon steel and mild steel and steel plates for shipbuilding and fabrication industries. It can be safely used in a closed room in shipbuilding industry and is safer than propane, LPG, acetylene and liquefied gas.

The additives compositions for natural hydrocarbon-based fuels of the invention are cost effective. It can save energy 1 ton of the natural gas with additives compositions of the invention is equivalent to about at least 2 ton of the conventional acetylene/propylene. It can save at least 70% to 40% fuel in comparison with the conventional propane. The additives compositions for natural hydrocarbon-based fuels of the present invention with natural gas are extremely safe for cutting steel plate as lighter than air, quicker start time due to concentrated high temperature, >10 % faster cutting speed on straight cutting, > 15 % faster cutting speed on shape cutting, Less tendency to round at top edge of the cut & produces less slag, easy to remove slag from material and faster cleanup and finishing, Extremely clean, environment friendly, low carbon burning. Unlike Acetylene & LPG, you can use >99% of the gas volume. Reduces the amount of oxygen required for equivalent cutting volume. High quality finish while cutting Reduces Grinding.

In another embodiment of the invention, the following test is conducted: Work piece to be cut steel plate for shipbuilding. Gas for cutting is conventional natural gas with additives compositions of present invention according to the preferred embodiment of the invention. Test results are shown in Table 1.

(Table 1) Example of preparation of additives compositions for natural hydrocarbon-based fuels

Example 1

Example 1 The process of preparation of additives compositions for natural hydrocarbon-based the blend 1 comprises mixture of Neo-Pentane in range of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, 2-Methyl Butane in rang of 0.3% to 30.0%, N-Pentane in rang of 0.35% to 35.0%, Cyclopentane in rang of is 0.5% to 5.0%, 2,2 Dimethyl Butane in rang of 0.3% to 3.0%, 1- Pentene in rang of 0.15% to 15.0%, 3-Methyl Pentane in rang of 0.3% to 3%, N-Hexane in rang of 0.5% to 5.0%, l-Propanol in rang of 0.2% to 20.0%, 2,3 Dimethyl Pentane in rang of 0.3% to 3.0%, 3-Methyl Hexane in rang of 0.1% to 1.0%, 2,2,4- Trimethyl Pentane in rang of 0.15% to 15%, 2,5- Dimethyl Hexane in rang of 0.1% to 1.0%, 2,4 -Dimethyl Hexane in rang of 0.1% to 1.0%, 2,3,4 -Trimethyl Pentane in rang of 0.1% to 1.0%, 2,3,3- Trimethyl

Pentane in rang of 0.5% to 5.0%, 2,3-Dimethyl Hexane in rang of 0.1% to

1.0%.

Blend 1

Result:

Additives composition of blend 2 has excellent cutting speed, Average consumption of Oxygen and Gas. Moreover, said composition does not form any slag as slag property is Nil. Further, said composition provides mirror finishing cutting.

Example 2 Example 2 The process of preparation of additives compositions for natural hydrocarbon-based the blend 2 comprises mixture of Neo-Pentane in range of 0.1% to 1.0%, Ethanol in rang of 0.1% to 1.0%, pentanol in range of 0.3% to 3.0%, glycerol in range of 0.5% to 5.0%, heptane in range of 0.1% to 1.0%, octane in rang of 0.2% to 20.0%, decane in range of 0.15% to 15.0%, undecan in rang of 0.3% to 3.0%, 2-Methyl Butane in rang 0.2% to 20.0%, N-Pentane in range of 0.2% to 20.0% - 0.3% to 30.0%, 2,2 Dimethyl Butane in range of 0.2% to 2.0%, 3-Methyl Pentane in rang of 0.3% to 3.0%, 3-Methyl Hexane in range of 0.1% to 1.0%, 2,2,4- Trimethyl Pentane in range of 0.5% to 5.0% - 0.15% to 15.0%, 2,4 -Dimethyl Hexane in range of 0.2% to 2.0%, 2- Propanethiol, 2-methyl- in range of 0.1% to 1.0%, Methyl Ethyl Sulfide in range of 0.1% to 1.0%.

Blend 2

Result:

Additives composition of blend 2 has better cutting speed, more consumption of Oxygen, Less consumption of Gas. Moreover, said composition mild slag form any slag as slag property is sticky. Further, said composition provides hard surface of cutting finish.

Example 3

Example 3 The process of preparation of additives compositions for natural hydrocarbon-based the blend 3 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, butanol in rang of 0.2% to 2.0%, propylene glycol in rang of 0.5% to 5.0%, vinyl carbinol in rang of 0.5% to 5.0%, nonane in rang of 0.5% to 5.0%, 2-Methyl Butane in rang of 0.15% to 15.0% - 0.25% to 25.0%, N-Pentane in rang of 0.40% to 40.0%, 2,2 Dimethyl Butane in rang of 0.10% to 10.0%, 3-Methyl Pentane in rang of 0.5% to 5.0%, N-Hexane in rang of 0.1% to 1.0%, 3-Methyl Hexane in rang of 0.1% to 1.0%, 2,2,4- Trimethyl Pentane in rang of 0.25% to 25.00%, 2,4 -Dimethyl Hexane in rang of 0.2% to 2.0%, 2,3-Dimethyl Hexane in rang of 0.1% to 1.0%, Methyl Ethyl Sulfide in rang of 0.5% to 5.0%.

Blend 3

Result:

Additives composition of blend 3 has better cutting speed, more consumption of Oxygen and Gas. Moreover, said composition more slag form any slag as slag property is mild sticky. Further, said composition provides rough surface of cutting finish.

Example 4 Example 4 The process of preparation of additives compositions for natural hydrocarbon-based the blend 4 comprises mixture of Ethanol in rang of 0.2% to 2.0%, ethylene glycol in rang of 0.3% to 3.0%, vinyl carbinol in rang of 0.4% to 4.0%, octane in rang of 0.3% to 3.0%, decane in rang of 0.10% to 10.00%, n-octane in rang of 0.1% to 1.0%, 2-Methyl Butane in rang of 0.30% to 30.00%, N-Pentane in rang of 0.25% to 25.00% - 0.35% to 35.00%, 2,2 Dimethyl Butane in rang of 0.5% to 5.0%, l-Pentene in rang of 0.10% to 10.00% - 0.20% to 20.00%, l-Propanol in rang of 0.15% to 15.00%, 2,3 Dimethyl Pentane in rang of 0.2% to 2.0%, 2,5- Dimethyl Hexane in rang of 0.2% to 2.0%, 2,3,3- Trimethyl Pentane in rang of 0.5% to 5.0%, 2-

Propanethiol, 2-methyl- in rang of 0.3% to 3.0%.

Blend 4

Result:

Additives composition of blend 4 has good cutting speed, Low consumption of Oxygen and Gas. Moreover, said composition moderate slag form any slag as slag property is sticky. Further, said composition provides no finishing cutting.

Example 5 Example 5 The process of preparation of additives compositions for natural hydrocarbon-based the blend 5 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, butanol in rang of 0.3% to 3.0%, pentanol in rang of 0.5% to 5.0%, propylene glycol in rang of 0.1% to 1.0%, vinyl carbinol in rang of 0.3% to 3.0%, decane in rang of 0.2% to 2.0%, undecan in rang of 0.2% to 2.0%, 2-Methyl Butane in rang of 0.35% to 35.00%, N-Pentane in rang of 0.45% to 45.00%, Cyclopentane in rang of 0.1% to 1.0%, l-Pentene in rang of 0.30% to 30.00%, N-Hexane in rang of 0.1% to 1.0%, 2,3 Dimethyl Pentane in rang of 0.1% to 1.0%, 2,3,4 - Trimethyl Pentane in rang of 0.1% to 1.0%.

Blend 5

Result:

Additives composition of blend 5 has Average cutting speed, more consumption of Oxygen. Low consumption of Gas. Moreover, said composition no slag forms any slag, as slag property is nil. Further, said composition provides smooth surface of cutting finish.

Example 6 Example 6 The process of preparation of additives compositions for natural hydrocarbon-based the blend 6 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, pentanol in rang of 0.5% to 5.0%, heptane in rang of 0.4% to 4.0%, nonane in rang of 0.1% to 1.0%, 2-Methyl Butane in rang of 0.20% to 20.00% - 0.30% - 30.00%, N- Pentane in rang of 0.30% to 30.00%, 2,2 Dimethyl Butane in rang of 0.4% to 4.0%, l-Pentene in rang of 0.5% to 5.0% - 0.15% to 15.00%, l-Propanol in range of 0.10% to 10.00% - 0.20% to 20.00%, 3-Methyl Hexane in range of 0.5% to 5.0%, 2,5- Dimethyl Hexane in range of 0.2% to 2.0%, 2,3,3- Trimethyl Pentane in rang of 0.1% to 1.0%, Methyl Ethyl Sulfide in range of 0.5% to 5.0%

Blend 6

Result:

Additives composition of blend 6 has poor cutting speed, more consumption of Oxygen. Moderate consumption of Gas. Moreover, said composition no slag forms any slag, as slag property is nil. Further, said composition provides rough surface of cutting finish.

Example 7

Example 7 The process of preparation of additives compositions for natural hydrocarbon-based the blend 7 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, butanol in rang of

0.1% to 1.0%, propylene glycol in rang of 0.1% to 1.0%, vinyl carbinol in rang of 0.5% to 5.0%, undecane in rang of 0.1% to 1.0%, 2-Methyl Butane in rang of 0.40 % to 40.00%, Cyclopentane in range of 0.5% to 5.0%, l-Pentene in rang of 0.15% to 15.0%, 3-Methyl Pentane in rang of 0.3% to 3.0%, 2,3 Dimethyl Pentane in rang of 0.3% to 3.0%, 2,2,4- Trimethyl Pentane in rang of 0.20% to 20.0%, 2,5- Dimethyl Hexane in rang of 0.1% to 1.0%, 2,4 - Dimethyl Hexane in rang of 0.1% to 1.0%, 2,3,4 -Trimethyl Pentane in rang of 0.2% to 2.0%, 2,3-Dimethyl Hexane in rang of 0.1% to 1.0%, 2- Propanethiol, 2-methyl- in rang of 0.2% to 2.0%.

Blend 7

Result:

Additives composition of blend 4 has better cutting speed, Equal consumption of Oxygen and Gas. Moreover, said composition more slag form any slag as slag property is sticky. Further, said composition provides average finishing cutting.

Example 8

Example 8 The process of preparation of additives compositions for natural hydrocarbon-based the blend 8 comprises mixture of Methyl Alcohol in rang of 0.1% to 1.0%, butanol in rang of 0.5% to 5.0%, ethylene glycol in rang of 0.2% to 2.0%, propylene glycol in rang of 0.1% to 1.0%, glycerol in rang of 0.1% to 1.0%, octane in rang of 0.1% to 1.0%, undecan in rang of 0.2% to

2.0%, 2-Methyl Butane in rang of 0.15% to 15.00% - 0.35% to 35.00%, Cyclopentane in rang of 0.2% to 2.0%, 2,2 Dimethyl Butane in rang of 0.3% to 3.0%, l-Pentene in rang of 0.15% to 15.00%, 3-Methyl Pentane in rang of 0.3% to 3.0%, N-Hexane in rang of 0.5% to 5.0%, 2,3 Dimethyl Pentane in rang of 0.3% to 3.0%, 2,5- Dimethyl Hexane in rang of 0.2% to 2.0%, 2,3,4 - Trimethyl Pentane in rang of 0.1% to 1.0%, 2,3-Dimethyl Hexane in rang of 0.5% to 5.0%, 2-Propanethiol, 2-methyl- in rang of 0.5% to 5.0%.

Blend 8

Result:

Additives composition of blend 8 has excellent cutting speed, more consumption of Oxygen. Less consumption of Gas. Moreover, said composition moderate slag forms any slag, as slag property is mild. Further, said composition provides rough surface of cutting finish.

Example 9

Example 9 The process of preparation of additives compositions for natural hydrocarbon-based the blend 9 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, Ethanol in rang of 0.2% to 2.0%, pentanol in rang of 0.4% to 4.0%, propylene glycol in rang of

0.1% to 1.0%, vinyl carbinol in rang of 0.4% to 4.0%, nonane in rang of 0.4% to 4.0%, undecan in rang of 0.2% to 2.0%, 2-Methyl Butane in rang of 0.30% to 30.00%, N-Pentane in rang of 0.40% to 40.00%, Cyclopentane in rang of 0.5% to 5.0%, l-Pentene in rang of 0.5% to 5.0% - 0.15% to 15.00%, 3- Methyl Pentane in rang of 0.3% to 3.0%, N-Hexane in rang of 0.5% to 5.0%, l-Propanol in rang of 0.10% to 10.00% - 0.20% to 20.00%, 2,3 Dimethyl Pentane in rang of 0.3% to 3.0%, 3-Methyl Hexane in rang of 0.1% to 1.0%, 2,5- Dimethyl Hexane in rang of 0.1% to 1.0%, 2,4 -Dimethyl Hexane in rang of 0.1% to 1.0%, 2,3,3- Trimethyl Pentane in rang of 0.5% to 5.0%, 2,3- Dimethyl Hexane in rang of 0.1% to 1.0%, Methyl Ethyl Sulfide in rang of 0.5% to 5.0%.

Blend 9

Result:

Additives composition of blend 9 has average cutting speed, more consumption of Oxygen. Less consumption of Gas. Moreover, said composition no slag forms any slag, as slag property is nil. Further, said composition provides smooth surface of cutting finish.

Example 10

Example 10 The process of preparation of additives compositions for natural hydrocarbon-based the blend 10 comprises mixture of Neo-Pentane in rang of 0.1% to 1.0%, Methyl Alcohol in rang of 0.1% to 1.0%, butanol in rang of

0.2% to 2.0%, ethylene glycol in rang of 0.3% to 3.0%, heptane in rang of

0.1% to 1.0%, decane in rang of 0.2% to 2.0%, 2-Methyl Butane in rang of

0.20% to 20.00% - 0.30% to 30.00%, N-Pentane in rang of 0.25% to 25.00% - 0.35% to 35.00%, Cyclopentane in rang of 0.5% to 5.0%, 2,2 Dimethyl Butane in range of 0.3% to 3.0%, l-Pentene in rang of 0.5% to 5.0% - 0.15% to 15.00%, 3-Methyl Pentane in range of 0.3% to 3.0%, N-Hexane in rang of 0.5% to 5.0%, l-Propanol in rang of 0.10% to 10.00% - 0.20% to 20.00%, 2,3 Dimethyl Pentane in range of 0.3% to 3.0%, 3-Methyl Hexane in rang of 0.1% to 1.0%, 2,2,4- Trimethyl Pentane in rang of 0.5% to 5.0% - 0.15% to 15.00%, 2,4 -Dimethyl Hexane in rang of 0.1% to 1.0%, 2,3,4 -Trimethyl

Pentane in rang of 0.2% to 2.0%, 2,3,3- Trimethyl Pentane in rang of 0.5% to 5.0%, 2,3-Dimethyl Hexane in rang of 0.1% to 1.0%.

Blend 10

Result:

Additives composition of blend 8 has excellent cutting speed, more consumption of Oxygen. Less consumption of Gas. Moreover, said composition no slag forms any slag, as slag property is nil. Further, said composition provides mirror surface of cutting finish.

Claims

CLAIM We, Claim

[CLAIM 1] An additives composition for natural hydrocarbon-based fuels

Comprising:

a) about 5 to 40 percent by weight of C₁-C₉ alcohol;

b) about 10 to 70 percent by weight of C3-C12 alkanes; and c) about 1 to 10 percent by weight of catalyst selected form 2-methyl-2-Propanethiol, Methyl Ethyl Sulfide;

d) About 5 to 20 percent by weight of cycloalkanes.

[CLAIM 2] The additives composition for natural hydrocarbon-based fuels as claimed in claim 1 wherein additives composition comprises:

a) about 5 to 40 percent by weight of C₁-C₉ alcohol;

b) about 10 to 70 percent by weight of C3-C12 alkanes; and c) about 5 to 20 percent by weight of cycloalkanes;

d) about 1 to 10 percent by weight of catalyst selected form 2-methyl-2-Propanethiol, Methyl Ethyl Sulfide;

e) mixtures thereof and optionally higher-Octane fuels, Allyl alcohol, glycol.

[CLAIM 3] The additives composition for natural hydrocarbon-based fuels

As claimed in claim 1 wherein, C₁-C₉ alcohol are linear or cyclic, saturated or unsaturated alcohols.

[CLAIM 4] The additives composition for natural hydrocarbon-based fuels as claimed in claim 3 wherein, C₁-C₉ alcohol are selected form n-butyl alcohol, sec -butyl alcohol, isobutyl alcohol, tert-butyl alcohol, l-pentanol, 2-pentanol, 1 -ethyl- 1 -propanol, 2-methyl -

1 -butanol, 3 -methyl- 1 -butanol, 3-methyl-2-butanol, neopentyl alcohol, l-hexanol, 2-methyl- l-pentanol, 4-methyl-2-pentanol,

2-ethyl- 1 -butanol, l-heptanol, 2-heptanol, 3-heptanol, 1- octanol, 2-octanol, 2-ethyl- l-hexanol, l-nonanol, 3,5,5- trimethyl- l-hexanol, l-decanol, l-undecanol, l-dodecanol, cyclohexanol, l-methylcyclohexanol, 2-methylcyclohexanol,

3-methylcyclohexanol, 4-methylcyclohexanol, a-terpineol, 2,6- dimethyl-4-heptanol, nonyl alcohol or tetradecyl alcohol or mixtures thereof.

[CLAIM 5] The additives composition for natural hydrocarbon-based fuels as claimed in claim 3 wherein, -Cg alcohol are preferably selected from the group methanol, ethanol, isopropanol butanol or mixtures thereof.

[CLAIM 6] The additives composition for natural hydrocarbon-based fuels as claimed in claim 1 wherein, C₃-C₁₂ alkanes are linear or branched alkanes.

[CLAIM 7] The additives composition for natural hydrocarbon-based fuels as claimed in claim 6 wherein, C₃-C₁₂ alkanes Alkanes selected from the group n-propane, n-butane, 2-methylpropane (iso butane), n-pentane, 2-methylbutane, n-hexane, 2- methylpentane, 3-methylpentane, 2,2-dimethylbutane, 2,3- dimethylbutane, n-heptane, 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethyl- pentane, 2,4- dimethylpentane, 3,3-dimethylpentane, 3-ethyl pentane, 2,2,3- trimethyl- butane, n-octane, methylheptanes, 2-methylheptane, dimethyhexanes, 2,2- dimethylhex- ane, ethylhexanes, 2- ethylhexane, trimethylpentanes, 2,2,3- trimethylpentane, methylethylpentanes, 2-methyl-3 -ethyl-pentane, n-nonane, methyloctanes, 2-methyloktane, dimethylheptanes, 2,3- dimethylhep- tane, ethylheptanes, 2-ethylheptane, methylethylhexanes, 2- methyl-3- ethylhexane, diethylpentanes, 3,3-diethylpentane, n-decane, methylnonanes, 2-methylnonane, dimethyloktanes, 2,3- dimethyloktane, methylethylheptanes, 2-methyl-3-ethylheptane, propylhexanes, 2-propylhexane, isopropyl hexanes, 2-isopropylhexane, methylpropylpentanes, 2-propyl-4-methylpentane, 2-propyl-5- methylpentane, n-undecane, iso-undecanes or mixtures thereof.

[CLAIM 8] The additives composition for natural hydrocarbon-based fuels as claimed in claim 6 wherein, C3-C12 alkanes are preferably n- butane, i-butane, 2-Methyl-Butane, 2,2 Dimethyl Butane, 2,3- dimethyl butane, Neo-Pentane, N Pentane, l-Pentene, 3-Methyl Pentane, 2-Methyl Pentane, 2,3 -Dimethyl Pentane, 3 -Methyl Hexane, 2,2,4 -Trimethyl Pentane, 2,5-Dimethyl Hexane, 2,4- Dimethyl Hexane, 2,3,4-Trimethyl Pentane, 2,3,3-Trimethl Pentane, N-Hexane, 2,3-Dimethyl Hexane, heptane, octane or mixtures thereof.

[CLAIM 9] The additives composition for natural hydrocarbon-based fuels as claimed in claim 1 wherein, alicyclic compound are monocyclic cycloalkanes selected from cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, norbornene, norbomadiene. Cyclopentane or mixtures thereof.

[CLAIM 10] The additives composition for natural hydrocarbon-based fuels as claimed in claim 1 wherein, catalysts for additives are selected from 2-methyl-2-Propanethiol, and Methyl Ethyl Sulfide or mixture thereof. [CLAIM 11] The additives composition for natural hydrocarbon-based fuels as claimed in claim 1 wherein, other additives are optionally selected form the group of additives higher Octane fuels are selected from the group consisting of paraffins, olefinic, acetylenes hydrocarbons, aromatic hydrocarbons and mixtures thereof; vinyl carbinol or carbinol derivatives; Allyl alcohol and glycol can also be selected from a group consisting of polybutylene glycol, polyethylene glycol, polypropylene glycol and mixtures thereof.