CN103804928B

CN103804928B - A kind of method improving pitch flash points

Info

Publication number: CN103804928B
Application number: CN201210439990.XA
Authority: CN
Inventors: 张静; 宁爱民; 程国香; 李志军; 陈保莲; 郭皎河; 刘树华
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: 2012-11-07
Filing date: 2012-11-07
Publication date: 2016-08-17
Anticipated expiration: 2032-11-07
Also published as: CN103804928A

Abstract

The invention discloses a kind of method improving pitch flash points, including following content: Na₂CO₃Or NaHCO₃Solution and organic acid substance carry out saponification in matrix pitch, obtain high-flash Colophonium.Wherein, Na₂CO₃Or NaHCO₃Consumption is the 3% ~ 80% of organic acid substance quality, and organic acid substance consumption is the 0.2% ~ 8% of matrix pitch quality.The organic acid that saponification uses includes all of satisfied fatty acid, oleic acid, linoleic acid, rosin acid etc., the crude tall oil particularly extracted from alkaline process wood pulp residual liquid or refined tall oil, cheap, wide material sources, the inventive method can be effectively improved the flash-point of asphaltic products, typically can improve product flash-point value more than 30 DEG C.

Description

A kind of method improving pitch flash points

Technical field

The present invention relates to a kind of method improving pitch flash points.

Background technology

Flash-point is the sign of bi tumenf orr oad construction safety.Flash-point is the highest, then Colophonium is the most nonflammable in work progress, and safety coefficient is the highest.In order to ensure the safety of construction, the flash-point of No. 90 bi tumenf orr oads is brought up to 245 DEG C by original 230 DEG C by Ministry of Communications's standard " standard specification for construction and acceptance of highway asphalt pavement enforcement manual " (JTG F4-2004), and by original 230 DEG C, the flash-point of No. 70 and following trade mark bi tumenf orr oad is brought up to 260 DEG C.Increasing substantially of Hashpoint standard, causes the flash-point of a lot of bi tumenf orr oad product to be difficult to up to standard.

CN1378582A discloses a kind of method improving asphalt performance, relate to a kind of production and there is high-flash and the method for low volatility asphaltic products, decompression distillation is carried out, in order to producing flash-point is the asphaltic products of 265-300 DEG C including the high point petroleum fraction of initial boiling point at least 270 DEG C and the mixed oil of crude oil.The method is interpolation the 3rd component in crude oil vacuum distillation process, and this mode can produce certain impact to vacuum distillation process and the vacuum distillate obtained, and is therefore of limited application.

CN1617916A discloses the batch process for preparing of a kind of high-flash Colophonium, joins in batch still including by coal tar；Add hot coal tar to the intermediate liquid state of maltha；Keep the medium temperature of maltha at maintenance level；And introduce injection gas, keep the temperature of coal tar substantially at maintenance level simultaneously.The method can produce the Colophonium that flash-point exceedes about 270 DEG C, but needs the 3rd component coal tar, is limited by raw material sources.

Above-mentioned existing method cannot be applicable to existing asphalt production device and improve because of asphaltic products standard, and the problem that can not produce qualified products.

Summary of the invention

Problem that can not be up to standard for existing road asphalt flash-point, the invention provides a kind of method improving pitch flash points.

A kind of method improving pitch flash points of the present invention, including following content: Na₂CO₃Or NaHCO₃Solution and organic acid substance carry out saponification in matrix pitch, obtain high-flash Colophonium.

In the inventive method, matrix pitch is heated to trickling state, then mixs homogeneously with organic acid substance, adds Na₂CO₃Or NaHCO₃Solution carries out saponification, and the response time is generally 10 ~ 180 minutes.Course of reaction is it is generally required to carry out under agitation.

In the inventive method, Na₂CO₃Or NaHCO₃Consumption is the 3% ~ 80% of organic acid substance quality, and organic acid substance consumption is the 0.2% ~ 8% of matrix pitch quality.

In the inventive method, Na₂CO₃Or NaHCO₃The mass percent concentration of solution is 10% to saturated solution, preferably saturated solution.

In the inventive method, organic acid substance includes the material containing organic acid that the organic acid, preferably price such as the satisfied fatty acid of C9～C18, oleic acid, linoleic acid, rosin acid are relatively low, the tall oil most preferably extracted from alkaline process wood pulp residual liquid, can be crude tall oil, it is also possible to be refined tall oil.

In the inventive method, matrix pitch can be asphalt stock or the residual oil raw material of any character as required, and such as No. 70 Colophoniumes, No. 90 Colophoniumes etc., the production method of matrix pitch is well known to those skilled in the art.

In the inventive method, other conventional additive can be added as needed on, as one or more in agent etc. are prolonged in age resister, viscosifier, toughener, increasing.

In the inventive method, organic acid substance and the saponification product of alkaline solution, the flash-point value of asphaltic products can be increased substantially, do not affect other character of asphaltic products, generally add and can improve matrix pitch flash-point a little more than 30 DEG C.

Preparation method of the present invention is simple, low cost, and raw material sources are extensive, with a wide range of applications.Saponification is carried out in Colophonium medium, and organic acid substance is prone to mix homogeneously with matrix pitch, and saponification post-modification bituminous composition character is homogeneous, and react gentle, for existing asphalt production device, it is not necessary to make any change, it is possible to produce the asphaltic products meeting new standard.

Detailed description of the invention

Listed embodiment is the purpose further illustrated, and the material involved by preparation method of the present invention is not limited in described in embodiment, and organic acid substance includes satisfied fatty acid, oleic acid, linoleic acid and rosin acid etc..Organic acid in embodiment is only the purpose further illustrated with the material ratio of bases, adjusts with specific reference to matrix pitch medium pitch acid content, the kind of organic acid substance and purity.

It is further described below with embodiment below:

Embodiment 1

Certain 70# asphalt 1000g, adds the crude tall oil 5g that certain alkaline process wood pulp residual liquid is extracted under the conditions of 150 DEG C ± 5 DEG C, is slowly dropped into Na after stirring₂CO₃Saturated solution 3g, this process is carried out the most under agitation, is stirred for 20min and i.e. obtains bituminous composition after titration, and product characteristics the results are shown in Table 1.

Embodiment 2

Certain decompression residuum 1000g, adds the refined tall oil 10g that certain alkaline process wood pulp residual liquid is extracted under the conditions of 135 DEG C ± 5 DEG C, is slowly dropped into the NaHCO of 50wt% after stirring₃Solution 15g, this process is carried out the most under agitation, is stirred for 50min and i.e. obtains bituminous composition after titration, and product characteristics the results are shown in Table 1.

Table 1 embodiment raw material and product characteristics.

Material	Flash-point, DEG C	Needle penetration, 0.1mm	Softening point, DEG C	10 DEG C of ductilities, cm
					No. 70 Colophoniumes	241	73	53.4	>150
Embodiment 1	266	69	54.6	>150
					Decompression residuum	228	156	—	—
Embodiment 2	261	142	—	—

As can be seen from Table 1, the inventive method significantly improves Colophonium and slag oil flash, and softening point raises, and improves the ageing resistace of product.

Claims

1. the method improving pitch flash points, it is characterised in that: Na₂CO₃Or NaHCO₃Solution and organic acid substance carry out saponification in matrix pitch, obtain product；Wherein matrix pitch need to be heated to trickling state, then mixs homogeneously with organic acid substance, adds Na₂CO₃Or NaHCO₃Solution carries out saponification；Na₂CO₃Or NaHCO₃Consumption be the mass percent of organic acid substance be 75% ~ 80%；Organic acid substance consumption is the 0.2% ~ 0.5% of matrix pitch quality.

The most in accordance with the method for claim 1, it is characterised in that: the response time is 10 ~ 180 minutes, and course of reaction is carried out under agitation.

The most in accordance with the method for claim 1, it is characterised in that: Na₂CO₃Or NaHCO₃The mass percent concentration of solution is 10% to saturated solution.

The most in accordance with the method for claim 1, it is characterised in that: organic acid substance is one or more in the satisfied fatty acid of C9～C18, oleic acid, linoleic acid or rosin acid.

The most in accordance with the method for claim 1, it is characterised in that: organic acid substance is the crude tall oil or refined tall oil extracted from alkaline process wood pulp residual liquid.

The most in accordance with the method for claim 1, it is characterised in that: matrix pitch is asphalt stock or residual oil raw material.

The most in accordance with the method for claim 1, it is characterised in that: in preparation process, one or more in agent are prolonged in addition age resister, viscosifier, toughener, increasing.