CN1069998A

CN1069998A - The production technique of coal-tar type diesel and compound method

Info

Publication number: CN1069998A
Application number: CN 92110407
Authority: CN
Inventors: 郑鉴
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-08
Filing date: 1992-09-08
Publication date: 1993-03-17

Abstract

The present invention relates to a kind of 360 ℃ of cuts in the past that utilize coal tar, take tar liquid after distillation, cooling, knot product separation as basic oil, add auxiliary agent and additive through acid, alkali and water washing, filtration again, carry out deodorization and decolouring and the coal-tar type diesel that can replace diesel oil that obtains.The invention has the advantages that raw material sources are extensively abundant, low cost of manufacture, Processes and apparatus is simple and easy to grasp.The product sufficient combustion, the thermo-efficiency height, stability period is long, and tail cigarette free air delivery is lower than advantages such as national standard, and quality meets the requirement of GB252-87 salable product, and being fit to various is the motive power machine equipment of fuel with diesel oil.

Description

The production technique of coal-tar type diesel and compound method

The present invention relates to and a kind ofly produce the production technique and the compound method of diesel oil, belong to the preparation method of the novel motive power machine fuel of substitute diesel with coal tar.

The main raw material of preparation diesel oil is an oil, and Processes and apparatus is more complicated all, and cost is high and investment is big.Other similar substitute diesel has emulsification and combined diesel oil etc., and every physical and chemical index just descends thereupon more than January once depositing, its less stable, and it is significant to adopt coal tar to produce diesel oil.The objective of the invention is to utilize the coal resources of China's abundant, from high, with coalite tar in extract the main raw material of special component as substitute diesel, the diesel oil of producing through special production technique and prescription is to alleviate the situation of oil shortage.

The production technique of coal-tar type diesel of the present invention and compound method is characterized in that collecting the liquid fractions that distills out before 360 ℃ in the coal tar, remove deleterious solid-state aromatic hydrocarbons thing phenol, naphthalene, anthracene and pitch through rectifying.Again through peracid slightly wash, alkali fine purifiation, allotment, deodorization and decolouring promptly obtain coal-tar type diesel, the every physical and chemical index of its product meets the salable product requirement of GB252-87 solar oil.

The invention has the advantages that and can utilize the raw gas-coal tar of the coke-oven plant's discharge that extensively is distributed in various places to be raw material, resource is very abundant.Adopt better simply air distillation method, technology is easily grasped, and investment of production equipment is little, and production cost is low, but last detective and industrialized developing production.Economic benefit height not only, and can alleviate tar again to the pollution that environment brings, turn waste into wealth.

Below in conjunction with example in detail content of the present invention:

1,360 ℃ of fractions in the past of coal tar are collected in air distillation, and its production technique operation is as follows:

A, in isolating fraction between 180 ℃～216 ℃ that cut, crystallisation by cooling accounts for the solid-state aromatic hydrocarbons things such as phenol, formic acid and pyridine of total tar yield 0.81-1%;

B, again through cooling, crystallization, isolate the solid-state naphthalene that accounts for total tar yield 6～8% between 216 ℃～280 ℃ that cut in the fraction;

C, again through cooling, crystallization, isolate the solid-state anthracene that accounts for total tar yield 4～6% between 300 ℃～360 ℃ that cut in the fraction;

D, 360 ℃ of later raffinates are that coal tar pitch is discharged through being cooled to the use of solid collection packing at the bottom of still kettle;

E, slightly wash: the liquid oil after the above separation is mixed into smart tar, and adding 5% concentration by its weight ratio is that 96% sulfuric acid pumps in enamel or the stainless steel stirred autoclave and slightly washed 30 minutes, and service temperature is 40～50 ℃ in the still, and the stirring revolution is 200r/min.Leave standstill again and isolate acid sludge liquid after 30 minutes and promptly draw basic oil.

F, fine purifiation: basic oil is pumped in another enamel stirred autoclave, and adding 5～10% concentration by its weight ratio is 30% hydroxide soda lye fine purifiation 30 minutes (add-on of alkali liquid is good to transfer pH value 7-8).Service temperature is 80 ℃ in the still, and the stirring revolution is 300r/min, leaves standstill to isolate alkali slag liquid after 40 minutes and promptly draw smart basic oil again.

G, washing: basic oil is pumped into the tap water that adds 0.5 times of its weight ratio in the container of another stirring and washed at normal temperatures 30 minutes, stirrings revolution is 150r/min, leaves standstill the work in-process oil that separation water outlet in 20 minutes promptly draws coal-tar type diesel.

Its main purpose of above operating procedure is the harmful object in 360 ℃ of foreshot oil of Ex-all excision, as the polycyclc aromatic compound of compound such as nitrogen, sulphur, oxygen and classes such as free acid and asphalt colloid.Because these not Ex-alls of organic compound, directly influence oil oxidation rubber addition polymerization, darken fast, starting is difficult, smoke density is big and shortcoming such as etching mechanism part, causes the defective of the unstable and every physical and chemical index of product.And analogous products emulsification that occurs in the market and combined diesel oil etc., can only in short-term (in three months), use and interim adapted, its poor stability, the characteristics of coal-tar type diesel of the present invention are compared the principle that has fundamentally with other analogous products, can match in excellence or beauty with petroleum products.

2, allotment: will more than the work in-process oil that draws after 120 mesh filter screens filter, pump into and add auxiliary agent by its weight ratio in container that another band stirs and additive stirred 30 minutes at normal temperatures, the stirring revolution is 150r/min, promptly draws the finished product coal-tar type diesel.Its concrete prescription is as follows:

A, coal tar (the work in-process oil after the treated processing) 90%

B, auxiliary agent (kerosene or other contain organic goods and materials of normal paraffin) 8%

C, additive (ignition dope aluminum borohydride 0.01%, barium naphthenate 0.05%; Antioxidizing and antigum agent di-sec-butyl-p-phenyl enediamine 0.007%; Metal organic sulfonate 0.87%; Anti-carbon agent diamyl disulfide is for first propylhomoserin aluminium 0.05%; Pour point depressant maleate 0.003%; Cetane number improving agent alkyl nitric ether 1%; Smoke suppressor methyl cyclopentadienyl tricarbonyl manganese 0.01%).

2, the optimum formula of example is as follows:

A, coal tar 30%

B, auxiliary agent 18%

C, additive 2%

4, deodorization decoloring: the readymade coal tar oil type diesel oil after will allocating pumps in another still kettle, and the deodorization industrial chemicals cuprous chloride of adding 1～2% and 5% decolouring are heated to 340～350 ℃ with atlapulgite (or gac).After cooling and the filtration of 200 mesh filter screens, promptly draw the salable product coal-tar type diesel product that meets the GB252-87 solar oil.Adjust the wherein proportional quantity of additive part pour point depressant, the label (condensation point) of oil can be controlled in No. 0 to-No. 35, being adapted at various is to use in the power machine of fuel with diesel oil.

The technological process of production is with reference to the accompanying drawings produced.

Claims

1, a kind ofly produce the prescription of diesel oil, it is characterized in that its each component and content (weight percent) are with coal tar:

A, coal tar 90%, auxiliary agent 8%, additive 2%;

B, coal tar are the fraction before cut through distillation 360 ℃ (through cooling, crystallization, isolate the work in-process oil that phenol, naphthalene, anthracene aftertreatment wash)

Auxiliary agent is kerosene (or other contains the organic matter raw material of normal paraffin)

Each component and content are in the additive: 0.01% aluminum borohydride, 0.05% barium naphthenate, 0.007%, di-sec-butyl-p-phenyl enediamine, 0.87% metal organic sulfonate, 0.05% diamyl disulfide are for first propylhomoserin aluminium, 0.003% maleate, 1% alkyl nitric ether and 0.01% methyl cyclopentadienyl tricarbonyl manganese.

2,, it is characterized in that the optimum content of its each component is: coal tar 80%, auxiliary agent 18%, additive 2% according to the described prescription of claim 1.

3, a kind of compounding process of coal-tar type diesel is characterized in that its six step operations are respectively:

A, distillation: coal tar is heated to 360 ℃ under air distillation, the fraction between collecting 130～360 ℃ goes out phenol, naphthalene, anthracene and promptly draws smart tar through cooling, Crystallization Separation.

B, slightly wash: smart tar is pumped into enamel stirred autoclave internal heating to 40～50 ℃ after 120 mesh filter screens filter, add 5% concentration in proportion and be 96% sulfuric acid and washed 30 minutes, leave standstill and isolate acid sludge liquid after 30 minutes and promptly draw basic oil.

C, fine purifiation: basic oil is pumped into another enamel stirred autoclave internal heating to 80 ℃, added 5～10% concentration in proportion and be 30% caustic wash(ing) 30 minutes, leave standstill and isolate alkali slag liquid after 30 minutes and promptly draw smart basic oil.

D, washing: smart basic oil pumped into add 0.5 times of tap water in container that another band stirs and washed at normal temperatures 30 minutes, leave standstill and separate the work in-process oil that water outlet promptly draws diesel oil after 20 minutes.

E, allotment: the work in-process oil pump is gone into add by weight in the container of another belt stirrer auxiliary agent and additive and stir and promptly drew the finished product coal-tar type diesel in 30 minutes.

F, deodorization decoloring: readymade coal tar oil type diesel oil pumped into add 1～2% cuprous chloride and 5% atlapulgite in other still kettle, be heated to 340～350 ℃ and after cooling off, filter and promptly draw the salable product coal-tar type diesel that meets GB252-87 solar oil standard with 200 mesh filter screens.