CN107513414B

CN107513414B - A method of preparing grinding wheel processing wax

Info

Publication number: CN107513414B
Application number: CN201610432968.0A
Authority: CN
Inventors: 孙剑锋; 袁平飞; 陈保莲; 王士新; 王咏芳; 张志银
Original assignee: China Petroleum and Chemical Corp; Sinopec Fushun Research Institute of Petroleum and Petrochemicals
Current assignee: China Petroleum and Chemical Corp; Sinopec Fushun Research Institute of Petroleum and Petrochemicals
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2019-05-21
Anticipated expiration: 2036-06-17
Also published as: CN107513414A

Abstract

The invention discloses a kind of methods for preparing grinding wheel processing wax.The method of the present invention is on the basis of common sweating process, liquid composition is carried out to force separation solids fraction and liquid composition by wax layer using air-flow in sweating effort, micro-bubble is formed in wax layer using the gas that the decomposable substance of dissolution in the feed generates simultaneously, is also beneficial to the quick discharge of liquid composition.The method of the present invention has many advantages, such as that equipment investment is low, preparation process is simple and operating cost is low, safety, energy conservation and solvent-free pollution, products therefrom can be used as grinding wheel release agent.

Description

A method of preparing grinding wheel processing wax

Technical field

The invention belongs to Wax special production technical fields, more particularly to a kind of method for preparing grinding wheel processing wax.

Background technique

Paraffin is common auxiliary agent in machining, one of them is just used as various materials as a kind of oil product Grinding wheel release agent.

In the fabrication process, mold and release agent are all essential to grinding wheel.Release agent has non-as a kind of coating Often low surface energy can form good heat-staple film layer when on the basis material for being applied to manufacture grinding wheel production mould, it Chemical bonds are formed with die surface, abrasive wheel forming component can be allowed quickly to fall off easily.Good release agent can be generated without dirt Stripping result, thus yield rate is improved, production cost is reduced, the production cycle is shortened, guarantees the consistency of wheel face quality.Sand Wheel release agent is generally external application type, that is, is coated in cavity surface.Exterior-applied mold lubricant can be divided into inorganic, organic and polymerization species. Common inorganic release agent mainly has talcum powder, mica powder etc., they the shortcomings that be easily to leave mold deposit and trace；Organic release agent Including soaps, paraffin etc., they the shortcomings that be also that mold deposit is more, there are also corrosivenesses to mold for soaps release agent；Polymerization species have Polytetrafluoroethylene (PTFE), silicone oil etc., stripping result is good, but expensive.

In terms of paraffin wax product production technology, the common manufacturing process that separates mainly has distillation, solvent separation, sweating separation Deng.

Distillation is to achieve the purpose that separating-purifying using the boiling point difference of different hydrocarbons, and the boiling range for reducing distillation can be effective The width of product carbon distribution is reduced, but distillation process needs raw material being heated to boiling point or more, consumes a large amount of energy.Simultaneously Fusing point 70 DEG C or more of hydro carbons boiling point more than 500 DEG C (normal pressures), efficiency is greatly reduced when being separated using distillation.

Solvent fractionation method is to reach separating-purifying using n-alkane and the different solubility of isoparaffin in a solvent Purpose, solvent separating technology investment of production equipment is big；It needs largely to use solvent in production process, recycling design needs to consume A large amount of energy；Benzene homologues are usually contained in solvent, environment can be impacted；Solvent is inflammable, be easy to cause production accident.

Sweating separation method carries out separating-purifying using components various in wax property with different melting points.Various groups in wax The molecular weight divided Bu Tong can all make its fusing point different with structure.When being all n-alkane, the biggish n-alkane of molecular weight Fusing point is higher, and the fusing point of the lesser n-alkane of molecular weight is lower；When molecular weight is identical, the fusing point of isoparaffin and cycloalkane To be lower than n-alkane, and isomery degree more high-melting-point is lower.So sweating separation method can reduce the distribution of product carbon Width can improve normal paraffin content again.

Compared with distillating method, since the melting temperature of various hydro carbons is far below boiling temperature, so sweating separation process Energy consumption far below distillation separation；Compared with solvent fractionation method, sweating separation process does not use solvent, so sweating separated Cheng Anquan, energy conservation and on environment without influence.

Common sweating process mainly comprises the steps that (1) preparation: pad water is (with water full of sweatbox ware plate Lower space) charge (raw material is heated to being packed into sweatbox when fusing point or more is in a liquid state) afterwards；(2) it crystallizes: by raw material with little 10~20 DEG C of its fusing point or less are progressively cooled in the rate of temperature fall of 4 DEG C/h.In cooling procedure, various components are by fusing point by height It is successively crystallized to low sequence and forms solid；(3) it sweating: after wax layer temperature reaches preset cooling final temperature, bleeds off Pad water；Raw material is slowly heated to preset sweating final temperature again.In sweating effort, various components by fusing point by as low as High sequence, which is successively fused into liquid and flows out the wax layer residue (on wax) finally obtained (under wax), to be exactly high-melting-point, low contains The wax of oil；(4) it refines: collection crude product (continue to increase temperature after sweating effort, be taken out on wax with fusing, as thick production Product), (predetermined temperature, mistake after addition carclazyte and constant temperature were stirred to the predetermined time are warming up to after melting crude product through clay-filtered Filter) after, reshaping, packaging are purpose product.

Common sweating separating technology can produce fusing point has coarse flaky crystal structure under 40 DEG C~60 DEG C of solid-state Soap manufacturing paraffin and low melt point paraffin, but for common sweating separation method, solids fraction is (compared with Gao Rong in heating sweating effort The wax of point) and liquid composition (wax oily and compared with low melting point) although being respectively at two kinds of phases of solid and liquid, be also difficult It is kept completely separate.To make the oil content of final products meet the requirements, generallys use and extend sweating sessions and raising sweating final temperature Method, but will lead to that the production cycle is long and product yield declines in this way.

Compared with solvent separates, sweating process is intermittently operated, and product yield is lower, the production cycle is longer, but is sent out Sweat technique has that small investment, production process is simple, operating cost is low, production process is safe, energy saving and no pollution to the environment etc. is excellent Point still has part of the manufacturer producing soap manufacturing paraffin product using this method at present.

For many years, sweating method has obtained some development in production equipment and process aspect, such as CN89214332(vertical type square Shape multipul sections spacer diaphoresis tank), CN94223980.6(ware type sudorific device), CN98233254.8(Paraffin sweating pot), CN200920033500.X(novel paraffin sweating tank), a kind of Efficient paraffin sweatbox of CN201210508905.0(), CN201320127680.4(tubular type paraffin deoiler) etc., it is improved in sweating production equipment；CN91206202(is a kind of High-efficient sweat pot for paraffin wax) it is improved on sweating process, but, the disadvantages such as product yield low long there are still the production cycle.

Sweating process is the unique solvent-free separation method being currently known for commercial scale wax product, green advocating Color low-carbon, environmental protection and energy saving today, good grinding wheel release agent can be prepared using sweating process.

Summary of the invention

In view of the deficiencies of the prior art, the present invention provides a kind of method for preparing grinding wheel processing wax.Using sweatbox, On the basis of common sweating separating technology, the decomposable substance for generating gas of oil-soluble is added after raw material heating fusing；And Liquid composition carried out by wax layer to force separation solids fraction and liquid composition using air-flow in sweating effort, is enhanced point From effect and accelerate separating rate；And increase the constant temperature stage of sweating effort, make this solvent-free separation method of sweating can be with Prepare the grinding wheel processing wax of low oil content, high isomery hydrocarbon content.The method of the present invention is with investment of production equipment is low, produced Journey is simple and operating cost is low, safety, energy conservation and the advantages that solvent-free pollution.

A kind of method preparing grinding wheel processing wax of the invention, including the following contents:

(1) charge: with fusing point for 50~72 DEG C, the common paraffin less than 2.0% is raw material, heating to oil content in mass The decomposable substance for generating gas of oil-soluble is added after fusing, is packed into sweatbox；

(2) it crystallizes: wax layer is cooled to by 8 DEG C~20 DEG C of raw material fusing point or less pre- with 1.0 DEG C/h~4.0 DEG C/h rate Determine temperature；

(3) sweating: with the heating of 0.5 DEG C/h~3.0 DEG C/h rate；Wax layer reaches first predetermined temperature and one section of constant temperature Time is continuously heating to second predetermined temperature and constant temperature stops sweating afterwards for a period of time, forces air-flow logical in sweating effort Cross wax layer；

(4) it refines: being that wax product is used in grinding wheel processing after the purification of purpose group lease making.

In method of the invention, the paraffin is that fusing point is 50~72 DEG C, oil content be less than 2.0%(mass) it is common The paraffin of paraffin, preferably fusing point at 54~64 DEG C.

In method of the invention, after the heating fusing of step (1) raw material, it is preferably added to the decomposable oil-soluble for generating gas Substance.Concrete operations are first to heat sweating raw material and melt, then the decomposable substance for generating gas of oil-soluble is dissolved in raw material After be packed into sweatbox.It includes organic azo compound, sulfonyl hydrazines compound, You Jiya that the oil-soluble, which can decompose substance, Nitro compound, organic peroxide etc., preferably one or more of organic azo compound and organic peroxide.Oil is molten Property decomposable substance additional amount be the 0.01%~15.00% of raw material weight, preferably 0.03%~8.00%.

Wherein, the organic azo compound is selected from azobisisoheptonitrile (ABVN), azodiisobutyronitrile (AIBN), idol One group of substance that nitrogen dicyclohexyl formonitrile HCN (ACCN) is constituted；The sulfonyl hydrazines compound is selected from benzene sulfonyl hydrazide, to toluene sulphur One group of substance that hydrazides, 4,4 '-bis oxides (benzene sulfonyl hydrazide) are constituted；The organic nitroso compounds are selected from dinitroso five Methenamine and/or N, N '-dimethyl N, N '-dinitroso phthalic amide；The organic peroxide is selected from peroxide Change dibenzoyl (BPO), dilauroyl peroxide (LPO), diacetyl peroxide, dicetyl peroxydicarbonate isopropyl ester (IPP), peroxidating One group of substance of the compositions such as two dicyclohexyl carbonates (DCPO).

In method of the invention, the sweatbox is sweating ware, and wax layer pressurizing device added above and/or Increase vacuum plant below wax layer.In step (3) sweating effort, the wax layer that forces air flow through is used above wax layer Increase air pressure and/or reduce air pressure below wax layer, so that wax layer upper and lower is formed pressure difference and realize.The pressure difference is general For 0.1~5.0 atmospheric pressure, preferably 0.2~2.0 atmospheric pressure, to force air flow through wax layer.

In method of the invention, the rate of temperature fall preferably 2.0 DEG C/h~3.0 DEG C/h of step (2) described crystallization.The drop Warm final temperature is preferably 8 DEG C~15 DEG C of paraffin fusing point or less.

In method of the invention, the heating rate of sweating effort described in step (3) preferably 1.0 DEG C/h~2.0 DEG C/h.Institute First predetermined temperature for stating heating is -10 DEG C of raw material fusing point~-2 DEG C of raw material fusing point (not including -2 DEG C of raw material fusing point), preferably - 6 DEG C of raw material fusing point~-2 DEG C of raw material fusing point；The predetermined temperature of second of heating is -2 DEG C of raw material fusing point~+6 DEG C of raw material fusing point, excellent It is selected as -2 DEG C of raw material fusing point~+4 DEG C of raw material fusing point.

It is described be warming up to predetermined temperature after, increasing the constant temperature stage can be such that solids fraction and liquid composition separates more to fill Point, the time in constant temperature stage is 0~5.0 hour, preferably 1.0~5.0 hours.In the present invention, purpose described in step (4) Component refers to that wax layer sweating effort is collected during the first time constant temperature of heating, which terminates to second of constant temperature, to be terminated in step (3) (two) wax under product.

In method of the invention, the heating rate and cooling rate of said wax layer can pass through air bath, water-bath, oil bath Or other feasible modes are controlled, it is preferred to use water-bath or oil bath.Wax layer heating is controlled using water-bath or oil bath mode When rate and rate of temperature fall, collet can be increased outside sweating ware, collet is connected with removable coil pipe and the circulatory system, collet, disk Pipe etc. can make wax layer lifting/lowering temperature process faster, wax layer more uniform temperature；The circulatory system has program cooling/heating function, circulation The substances such as water or conduction oil are added as circulatory mediator in system.

In method of the invention, the wax layer that forces air flow through of step (3) described sweating effort can be in sweating effort times The meaning stage implements, and preferably implements at sweating initial stage.

In method of the invention, the wax layer that forces air flow through of step (3) described sweating effort is utilized in above wax layer Increase what air pressure was realized, can such as apply the pressure of 0.2~2.0 atmospheric pressure (gauge pressure) above wax layer, and is kept below wax layer For normal pressure.

In method of the invention, the wax layer that forces air flow through of step (3) described sweating effort is utilized in below wax layer It reduces what air pressure was realized, normal pressure can be such as kept above wax layer, and maintain -0.2~-1.0 atmospheric pressure (tables below wax layer Pressure) pressure.

When release agent is applied on the basis material of manufacture grinding wheel production mould, good heat-staple film layer can be formed, it can To allow abrasive wheel forming component quickly to fall off easily.Good release agent can generate the stripping result without dirt, thus improve yield rate, drop Low production cost shortens the production cycle, guarantees the consistency of wheel face quality.

Release agent used in grinding wheel processing at present is substantially common paraffin.Studies have shown that presently commercially available commodity Paraffin usually contains the alkane of 20 carbon numbers or more, and carbon number distribution is wider, and oil content is usually 0.8 mass of mass %~2.0 %'s Higher level.When test result shows that common paraffin carbon number distribution is wide, that oil content is high is used as the release agent of grinding wheel processing, When being coated on cavity surface in grinding wheel process, there are uniformities, and bad, holding demoulding time is not grown, is had to product appearance The deficiencies of adverse effect.This is because the crystallization of common paraffin is thicker, and it is inadequate with mold adhesion strength, it is easily transferred to grinding wheel On, generally 2~3 production cycles can only be run by playing a wax, influence production efficiency；The product made of waxing for the first time speckles with more The wax of amount, hardness is partially soft after grinding wheel product hardens out, plays excessive wax or even can cause film.These are all common paraffinized Caused by learning composition, therefore common paraffin needs to reduce the carbon dispersion of distribution and oil content and properly increases isomery hydrocarbon content, just changes It is apt to its service performance, improves grinding wheel product quality and production efficiency.

Sweating separation method is to be separated using various components property with different melting points, but consolidate in sweating effort State component is difficult to be kept completely separate with liquid composition, this is because wax and oily two kinds of components are all nonpolar hydrocarbon molecules, molecule Between active force it is larger；Solid wax crystallization forms capillary pipe structure simultaneously, has stronger suction-operated to oil, this results in only leaning on Wax and oil are difficult to be kept completely separate in the common sweating effort of gravity natural separation.It generallys use and extends sweating sessions, improves sweating The methods of final temperature makes the oil content of final products meet the requirements, but this will lead to production cycle extension again, wax product is received Rate reduces.These affect the extensive use of sweating separation method.

The present invention, by being associated with for composition to common paraffin and service performance, determines to prepare grinding wheel processing wax Common paraffin carbon wider distribution, oil content are higher, lower isomery hydrocarbon content is the reason of influencing grinding wheel quality, by using sweating Method reduces oil content and the carbon dispersion of distribution, improves isomery hydrocarbon content.By the further investigation to common sweating effort, for solid State component is difficult to separate reason with liquid composition, uses in sweating effort and forces air flow through wax layer, and in sweating effort Increase the constant temperature stage；Further preferably oil-soluble, which is added, after raw material heating fusing can decompose substance simultaneously, these measures effectively improve The separative efficiency of sweating effort.

It is difficult to the reason of separating with liquid composition for solids fraction in sweating effort, by using gas in sweating effort Stream forces the separation of solids fraction and liquid composition by the method that wax layer carries out liquid composition, enhances separating effect and adds Fast separating rate；Oil-soluble is further preferably added after raw material heating fusing simultaneously can decompose substance, these substances are decomposable to be generated Gas, and have preferable dissolubility in the feed and be dispersed in wax layer.Raw material arrives sweating after being cooled to fusing point or less Wax layer is in softer solid state in the time that process terminates, and decomposable substance slowly decomposes the gas released during this Body can form evenly dispersed micro-bubble in wax layer, and the space that these micro-bubbles are formed is easy in sweating effort Several tiny channels are formed in wax layer, to be conducive to the discharge of liquid composition in sweating effort.Nitrogen is generated it is preferred that decomposing Or the oil-soluble of the gas of the nontoxic no special odor such as carbon dioxide can decompose substance, and the other materials molecular weight generated It is low, wax layer will be discharged with liquid composition in sweating effort.Be aided with again sweating effort the constant temperature stage make solids fraction with Liquid composition separation is the methods of more abundant, so that the grinding wheel processing wax that sweating process can be excellent with processability.

The invention has the advantages that by using air-flow to increase in sweating effort by the method that wax layer carries out liquid composition Strong solids fraction and the separating effect of liquid composition simultaneously accelerate separating rate；It can decompose substance decomposition using oil-soluble simultaneously The gas of generation forms evenly dispersed micro-bubble in wax layer, is also beneficial to the quick discharge of liquid composition；And increase hair The processes such as the constant temperature stage of sweat process, to produce good grinding wheel processing wax.Method of the invention has plant investment Low, production process is simple and operating cost is low, safety, energy conservation and the advantages that solvent-free pollution environment.

Specific embodiment

The present invention is raw material by selecting suitable common paraffin, on the basis of common sweating process, sweating ware top It connects dismountable sealing device and is connect with pressurized buffer tank and compressor, and/or connect pressure-reducing cushioning in sweating ware lower part Tank and vacuum pump；Raw material heating melts and is packed into sweating ware after being preferably added to the decomposable substance for generating gas of oil-soluble；With water Bath control wax layer heating-cooling speed；Wax layer reaches first predetermined temperature and constant temperature for a period of time, is continuously heating to second in advance Determine temperature and constant temperature stops sweating afterwards for a period of time；In sweating effort, start compressor in wax layer positive pressure formed above, And/or starting vacuum pump is in wax layer negative pressure formed below, to force air flow through wax layer；It is after the purification of purpose group lease making Wax product is used in grinding wheel processing.

1~4 illustrate the method for preparing grinding wheel processing wax of the invention by the following examples.As nothing is especially said Bright, the % being related to below is mass percent.

Embodiment 1

The present embodiment includes: (1) preparation, (2) crystallization, (3) heating-constant temperature-heating-constant temperature sweating, (4) purification etc. Process.

(1) preparation

Water is padded below sweating ware ware plate.The sealing system of sweating ware and pressurized buffer tank and compressor are connected；It is sending out Sweat ware lower part installation pressure-reducing cushioning tank simultaneously connects vacuum pump；Sweating ware collet and removable coil pipe are connect with the circulatory system, it will Coil pipe is fixed on sweating ware；Using water as heat-conducting medium, start the heating function of the circulatory system, recirculated water is made to be warming up to 62 DEG C.

With 58^#(production of Sinopec Yanshan Mountain branch company, 58.4 DEG C of fusing point, oil content 1.26%, isoparaffin contains semi-refined wax 21.66%) amount is raw material, sweating ware is added after being heated to 62 DEG C of fusings.

(2) it crystallizes

The refrigerating function for starting the circulatory system, makes wax layer temperature drop to 48.0 DEG C with the rate of temperature fall of 2.0 DEG C/h.It closes The refrigerating function of the circulatory system.

(3) heating-constant temperature-heating-constant temperature sweating

Sweating ware is discharged and pads water.Sweating ware outlet connection intermediate storage tank (I) is to receive under wax；The close of sweating ware top is installed Envelope system；Starting compressor simultaneously keeps pressurized buffer pressure inside the tank to stablize in 1.2~1.4 atmospheric pressure (gauge pressure), sweating ware ware Normal pressure is kept below plate；Start circulation system function, so that wax layer temperature is increased to 55.0 DEG C with the heating rate of 1.5 DEG C/h And constant temperature 3.0h；Stop compressor.

Sweating ware exports changing-over crude product storage tank (I) to receive under two waxes, as crude product (I)；Starting vacuum pump is simultaneously protected Pressure of keeping reducing buffering pressure inside the tank stablizes the air pressure above -0.5~-0.7 atmospheric pressure (gauge pressure), wax layer and keeps normal pressure；Continue with The heating rate of 1.5 DEG C/h makes wax layer temperature be increased to 60.0 DEG C and constant temperature 3.0h.Stop vacuum pump, terminates sweating effort.

The outlet of sweating ware is changed to connection intermediate storage tank (II)；Continue heat cycles water and is warming up to 70 DEG C with fusing taking-up wax On.

(4) it refines

It is that wax product (I) is used in grinding wheel processing after two wax the following group lease makings are clay-filtered in crude product storage tank (I).

Grinding wheel processing wax product (I) property: 58.2 DEG C of fusing point, oil content 0.45%, isoparaffin content 38.32%

Grinding wheel processing wax product (I) yield is 54.5%(relative to raw material 58^#Semi-refined wax).

Embodiment 2

(1) preparation

With 58^#Semi-refined wax (with embodiment 1) is raw material, is heated to the dilauroyl peroxide that 62 DEG C of fusings are added 0.35%, stirs Sweating ware is added after mixing.

(2) it crystallizes

(3) heating-constant temperature-heating-constant temperature sweating

Sweating ware is discharged and pads water.Sweating ware outlet connection intermediate storage tank (III) is to receive under wax；Sweating ware top is installed Sealing system；Starting compressor simultaneously keeps pressurized buffer pressure inside the tank to stablize in 1.2~1.4 atmospheric pressure (gauge pressure), sweating ware Normal pressure is kept below ware plate；Start circulation system function, so that wax layer temperature is increased to 55.0 with the heating rate of 1.5 DEG C/h DEG C and constant temperature 3.0h；Stop compressor.

Sweating ware exports changing-over crude product storage tank (II) to receive under two waxes, as crude product (II)；Start vacuum pump simultaneously It keeps pressure-reducing cushioning pressure inside the tank to stablize the air pressure above -0.5~-0.7 atmospheric pressure (gauge pressure), wax layer and keeps normal pressure；Continue Wax layer temperature is set to be increased to 60.0 DEG C and constant temperature 3.0h with the heating rate of 1.5 DEG C/h.Stop vacuum pump, terminates sweating effort.

The outlet of sweating ware is changed to connection intermediate storage tank (IV)；Continue heat cycles water and is warming up to 70 DEG C with fusing taking-up wax On.

(4) it refines

It is that wax product (II) is used in grinding wheel processing after two wax the following group lease makings are clay-filtered in crude product storage tank (II).

Grinding wheel processing wax product (II) property: 58.1 DEG C of fusing point, oil content 0.29%, isoparaffin content 42.59%

Grinding wheel processing wax product (II) yield is 60.8%(relative to raw material 58^#Semi-refined wax).

Embodiment 3

(1) preparation

With 58^#Semi-refined wax (with embodiment 1) is raw material, is heated to the azobisisoheptonitrile that 62 DEG C of fusings are added 6.8%, stirs Sweating ware is added after mixing.

Process (2)~(4) are the same as embodiment 2.

Grinding wheel processing wax product (III) property manufactured in the present embodiment: 58.2 DEG C of fusing point, oil content 0.30%, isomeric alkane Hydrocarbon content 41.47%

Grinding wheel processing wax product (III) yield is 60.5%(relative to raw material 58^#Semi-refined wax).

Comparative example 1

With the product of embodiment 1-3 and 58^#Semi-refined wax (property is with embodiment 1) is as grinding wheel release agent, grinding wheel raw material Liquid phenolic resin (wetting agent) and powdered phenol-formaldehyde resin, liquid powder ratio 1:3 carry out grinding wheel pilot production, knot using cold-press process Fruit see the table below 1.

Table 1

	Product (I)	Product (II)	Product (III)	58^#Semi-refined wax
					Number of run	6	7	7	3
Yield rate, %	97	99	99	91

Above-mentioned test result shows the product prepared with embodiment 1-3 as grinding wheel release agent, production run number and production Product yield rate is substantially improved.

By embodiment 1-3 can be seen that the present invention prepare grinding wheel processing wax method, by increase pressurization and/or The improvement to sweatbox such as vacuum facility；It is formed in wax layer using the gas that oil-soluble can decompose substance generation evenly dispersed Short space, force air flow through in sweating effort wax layer, the constant temperature stage for increasing sweating effort etc. to sweating process It improves；It enhances the separating effect of solids fraction and liquid composition and accelerates separating rate, to effectively remove in raw material Non- Suitable ingredients simultaneously increase isomery hydrocarbon content, and sweating process is made to prepare grinding wheel processing wax product.

Claims

1. a kind of method for preparing grinding wheel processing wax, including the following contents:

(1) charging: with fusing point for 50~72 DEG C, the paraffin less than 2.0% is raw material to oil content in mass, is added after heating fusing Enter the decomposable substance for generating gas of oil-soluble, is packed into sweatbox；

(2) it crystallizes: wax layer is cooled to 8 DEG C~20 DEG C of raw material fusing point or less of predetermined temperature with 1.0 DEG C/h~4.0 DEG C/h rate Degree；

(3) sweating: with the heating of 0.5 DEG C/h~3.0 DEG C/h rate；When wax layer reaches first predetermined temperature and one section of constant temperature Between, it is continuously heating to second predetermined temperature and constant temperature stops sweating afterwards for a period of time, forced air flow through in sweating effort Wax layer；First predetermined temperature is -10 DEG C of raw material fusing point~-2 DEG C of raw material fusing point, and second predetermined temperature is raw material - 2 DEG C of fusing point~+6 DEG C of raw material fusing point；

(4) it refines: being that wax product is used in grinding wheel processing after the purification of purpose group lease making；The purpose component refers to step (3) sweating First time constant temperature terminates to second of constant temperature product under the wax collected during terminating in the process.

2. according to the method for claim 1, which is characterized in that oil-soluble as described in step (1) is decomposable to generate gas Substance additional amount be raw material weight 0.01%~15.00%.

3. according to the method for claim 2, which is characterized in that oil-soluble as described in step (1) is decomposable to generate gas Substance additional amount be raw material weight 0.03%~8.00%.

4. according to the method for claim 1, which is characterized in that oil-soluble as described in step (1) is decomposable to generate gas Substance be selected from organic azo compound, sulfonyl hydrazines compound, organic nitroso compounds, organic peroxide constitute one Group substance.

5. according to the method for claim 4, which is characterized in that the organic azo compound is selected from the different heptan of azo two One group of substance that nitrile, azodiisobutyronitrile, azodicarbonamide and azo diisopropyl imidazoline hydrochloride are constituted；The sulfonyl hydrazines It closes object and is selected from one group of substance that benzene sulfonyl hydrazide, unifor, 4,4 '-bis oxides (benzene sulfonyl hydrazide) are constituted；Described is organic Nitroso compound is selected from dinitrosopentamethylene tetramine and/or N, N '-dimethyl N, N '-dinitroso phthalyl Amine；The organic peroxide is selected from dibenzoyl peroxide, dilauroyl peroxide, dicetyl peroxydicarbonate isopropyl ester and peroxide Change one group of substance of two dicyclohexyl carbonates composition.

6. according to method described in claim 1 or 4, which is characterized in that oil-soluble as described in step (1) is decomposable to generate gas The substance of body is organic azo compound and/or organic peroxide.

7. according to the method for claim 1, which is characterized in that predetermined temperature described in step (2) is starting paraffin 8 DEG C~15 DEG C below fusing point.

8. according to the method for claim 1, which is characterized in that force air flow through wax layer use described in step (3) Increase air pressure above wax layer and/or reduce air pressure below wax layer, so that wax layer upper and lower is formed pressure difference and realize, the pressure Power difference is 0.1~5.0 atmospheric pressure.

9. according to the method for claim 1, which is characterized in that first predetermined temperature described in step (3) is raw material - 6 DEG C of fusing point~-2 DEG C of raw material fusing point, described second predetermined temperature is -2 DEG C of raw material fusing point~+4 DEG C of raw material fusing point.

10. according to the method for claim 1, which is characterized in that in the time of first predetermined temperature constant temperature in step (3) It is 0.1~5.0 hour, is 0.1~5.0 hour in the time of second predetermined temperature constant temperature.

11. according to the method for claim 1, which is characterized in that force air flow through wax layer described in step (3) and sending out Sweat initial stage implements.

12. according to the method for claim 8, which is characterized in that the wax layer that forces air flow through uses in wax layer Fang Zengjia air pressure is realized, applies the gauge of 0.2~2.0 atmospheric pressure above wax layer, and remains normal pressure below wax layer.

13. according to the method for claim 8, which is characterized in that the wax layer that forces air flow through uses under wax layer Side reduces air pressure and realizes, air pressure keeps normal pressure above wax layer, and the table of -0.2~-1.0 atmospheric pressure is maintained below wax layer Pressure pressure.

14. according to the method for claim 1, which is characterized in that the sweatbox is sweating ware.

15. according to the method for claim 1, which is characterized in that the melting point of paraffin wax is 54~64 DEG C.

16. according to the method for claim 8, which is characterized in that the pressure difference is 0.2~2.0 atmospheric pressure.

17. according to the method for claim 10, which is characterized in that in step (3) first predetermined temperature constant temperature when Between be 1.0~5.0 hours, second predetermined temperature constant temperature time be 1.0~5.0 hours.