CS264806B1

CS264806B1 - Oil for rubber purposes

Info

Publication number: CS264806B1
Application number: CS862901A
Authority: CS
Inventors: Jozef Doc Ing Csc Baxa; Jiri Ing Kotek; Milos Ing Revus; Jan Kavec; Ludovit Guldan; Jan Jex
Original assignee: Baxa Jozef; Kotek Jiri; Revus Milos; Jan Kavec; Ludovit Guldan; Jan Jex
Priority date: 1986-04-21
Filing date: 1986-04-21
Publication date: 1989-09-12
Also published as: CS290186A1

Abstract

Riešenie sa týká oleja pre gumárenské účely s vysokým obsahom aromátov na báze menej viskózneho extraktu a velmi viskózneho reextraktu. Olej podlá riešenia pozostáva z 25 až 70 % hmot. olejového reextraktu o teplote varu v rozsahu 430 až 520 °C, kinematickej viskozitě pri 100 °C od 50 do 90 mm^ s“í, hustotě pri 20 °C 1 010 až 1 030 kg m-3, teplote tuhnutia 10 až 25 °C a obsahu parafínu 0,1 až 3 % hmot., vyrobeného extrakciou olejového extraktu zo sírno~parafinickej ropy furfuralom a z 30 až 75 % hmot. olejového extraktu o teplote varu z rozsahu 360 až 430 °C, kinematickej viskozitě pri 100 °C 5 až 10 mm^ s-1, hustotě pri 20 °C 970 až 995 kg m“3, teplote tuhnutia 4 až 18 °C a obsahu parafínu 6 až 13 $ hmot. Vzniknutý olej má viskozitu pri 100 °C 12 až 20 mm^ s-í, teplotu tuhnutia nižšiu ako 10 °C a obsahuje 30 až 50 % hmot. aromatického uhlíka a 3 až 9 % hmot. parafínu.The solution relates to an oil for rubber purposes with a high aromatic content based on a less viscous extract and a very viscous re-extract. The oil according to the solution consists of 25 to 70% by weight. oil re-extract with a boiling point in the range of 430 to 520 °C, a kinematic viscosity at 100 °C from 50 to 90 mm^ s“í, a density at 20 °C of 1,010 to 1,030 kg m-3, a freezing point of 10 to 25 °C and a paraffin content of 0.1 to 3% by weight, produced by extraction of an oil extract from sulfur-paraffinic crude oil with furfural and from 30 to 75% by weight of an oil extract with a boiling point in the range of 360 to 430 °C, a kinematic viscosity at 100 °C of 5 to 10 mm^ s-1, a density at 20 °C of 970 to 995 kg m“3, a freezing point of 4 to 18 °C and a paraffin content of 6 to 13% by weight. The resulting oil has a viscosity at 100°C of 12 to 20 mm^s-1, a pour point lower than 10°C and contains 30 to 50% by weight of aromatic carbon and 3 to 9% by weight of paraffin.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high aromatic rubber oil comprising defined and especially modified petroleum fractions.

In the processing industry of natural and synthetic rubbers, petroleum oils are used as so-called. extenders. A large part of them are aromatic oils, usually containing above 30% aromatic carbon. Processes which make it possible to obtain extracts having the desired aromatic carbon content are used to produce such oils. Oils with a high aroma content improve processability, actually accelerate processing, increase the tensile strength of the pulp elastomers, especially butadiene-styrene, increase impact resistance and also accelerate vulcanization. So the procedure according to the Czechoslovak. No. 245 333 is based on the subsequent extraction of furfural oil refining extracts from sulfur-paraffinic RSP. This extraction is carried out mainly at lower temperatures compared to conventional petroleum oil refining. At lower temperatures, the solvent is characterized by higher selectivity and reduced solubility. Thus, an extract with increased aromaticity and reduced pour point is produced, Csl. author's certificate 245 333 protects the production process. Despite many advantages over the previously known methods of production and achievement of quality adjustment parameters according to the requirements of rubber manufacturers, the product obtained by the technology according to the above mentioned article. of the author's certificate does not have some quality indicators at the level that is in the potential possibilities of the oil raw material from sulfur-paraffinic r6p. In particular, it is the relatively narrow fractional range of the extender thus obtained, since for the refining processes a narrow rainfall is generally made. and the presence of solid saturated hydrocarbons. ceresines, which are present in the oil fractions used to date for the production of extenders.

However, this deficiency is also solved by high aromatic rubber oil, which is characterized by the fact that it consists of 25 to 70% by weight. oil reextract with boiling range 430 to 520 ° C, kinematic viscosity at 100 ° C from 50 to 90 mm ² with ³ , density at 20 ° C 1 010 to 1 030 kg m- ³ , pour point 10 to 25 ° C and a paraffin content of 0.1 to wt.%, produced by furfural oil extraction of sulfur-paraffinic petroleum, and from 30 to 75% of oil extract boiling in the range of 360 to 430 ° C, kinematic viscosity at 100 ° C to 5 to 75%. 10 mm ² with ³ , a density at 20 ° C of 970 to 995 kg m ³ , a pour point of up to 18 ° C and a paraffin content of 6 to 13% by weight; produced by the furfural refining of the sulfur-paraffinic petroleum distillate to produce a compound oil having a viscosity at 100 ° C of 12 to 20 mm ² s ^-1 , a density at 20 ° C of 1 000 to 1 025 kg m ³ , a pour point below 10 ° C, containing 30 to 50% aromatic carbon and 3 to 9% wt. paraffin.

The aforementioned qualitative parameters of the starting components and the resulting product, in relation to the structure-property relationships, ensure the desired aroma and other properties of the oil. The advantage of the rubber oil according to the present invention is its wide fractionation range as it consists of a mild-viscous oil extract with a mean boiling point of about 400 ° C and a very viscous reextract with a mean boiling point of about 430 ° C, produced by subsequent extraction of furfural extract to 75 ° C and an extract-furfural weight ratio of 1: 1 to 4, which positively affects interacias in rubber mixtures. Also, the presence of a small amount of paraffin present in the low viscosity component is desirable in the product since paraffin itself is added to the rubber compound, mainly in the manufacture of tires, conveyor belts and other products. The rubber extenders of the compositions of the present invention have a group composition preferred for a variety of rubbers. They maintain good iysical-chemical parameters even at lower temperatures. Very good compatibility with polydiene rubbers, mainly due to a defined aromatic content, but also EPDM and other predominantly saturated rubbers, due to the alkanocyclanic fraction, which makes it suitable for a wide range of processed rubbers. There is no significant difference in the freezing point of the product of the present invention and of the products obtained by the foregoing methods. However, taking into account that in the case of petroleum products there is the right pour point as a result of solid hydrocarbon elimination; The false freezing point due to the high viscosity at low temperature and in the mixtures of oil extracts and reextracts, the freezing point characteristics can vary considerably depending on their composition. For the freezing temperatures of the mixture, such as oil extracts and reextracts, no additivity applies, but the depressant effect of the higher molecular weight proportions - resins present in the reextract - applies here. All in all, the freezing point of the compositions is a result of the multiplication of the viscosity, the crystallizing hydrocarbon content and the effect of the natural freezing point depressants. This results in a lower pour point of the product compared to that of the starting components.

Reextracts from the production of other oils, e.g. from the preparation of pseudoraffinates for cable oils, and conventional oil extracts.

More detailed details of the rubber oil according to the present invention as well as other advantages thereof are apparent from the example.

Example l

By extracting the heavy distillate extract from sulfur-paraffinic oil under the extraction conditions: head temperature RDC 62-75 ° C, temperature gradient 20-25 ° C, and a furfural-oil ratio of 2.5: 1, component A was produced in addition to the pseudo-refinate was compounded with component B (an extract from furfural refining of a medium-viscosity distillate from sulfur-paraffinic petroleum) in a weight ratio of 45 parts to 55 parts.

Ingredient and product properties:

Component A Component B Oil for Rubber-

Claims

Oil for rubber purposes with a high aroma content, characterized in that it consists of 25 to 70 wt. an oil reextract having a boiling range of 430 to 520 ° C, a kinematic viscosity at 100 ° C of 50 to 90 mm ² with a density at 20 ° C of 1,010 to 1,030 kg in ³ , a pour point of 10 to 25 ° C and a paraffin content 0.1 to 3 wt.% Produced by extracting the oil extract from sulfur-paraffinic petroleum with furfural and from 30 to 75 wt. oil extract boiling in the range of 360 to 430 ° C, kinematic viscosity at 100 ° C 5 to 10 mm ² with ³ , density at 20 ° C 970 to 995 kg m ^-3 , pour point 4 to 18 ° C and paraffin content 6-13% by weight, produced by refining sulfuric paraffinic petroleum desolate furfural, the resulting oil having a viscosity at 100 ° C of 12-20 mm ² s, a pour point of less than 10 ° C, and containing 30-50% % wt. % aromatic carbon and 3 to 9 wt. paraffin.