Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of transformer oil base oil

A transformer oil and base oil technology, applied in chemical instruments and methods, catalyst activation/preparation, base materials, etc., can solve the problems of high price, high molecular sieve content, high catalyst cost, etc., to reduce production costs and improve utilization , the effect of low pour point

Active Publication Date: 2021-04-09
CHINA NAT OFFSHORE OIL CORP +3
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent 106833740A discloses a method for preparing transformer oil base oil, which includes the following steps: hydrofining the naphthenic distillate oil under the action of a catalyst to obtain hydrofining oil, and hydrofining the oil. After hydroisomerization, the hydroisomerized oil is obtained, and the hydroisomerized oil is subjected to hydrogenation supplementary refining to obtain the three-stage hydrogenated oil, and then subjected to atmospheric and vacuum fractionation, and the fraction above 280°C is the transformer oil base Oil, the hydrogenation isomerization catalyst in this invention is a mixture of SAPO-11 and ZSM-22 molecular sieves as a carrier, and a noble metal catalyst with Pt / Pd as the active metal, which is expensive, resulting in higher cost of transformer oil base oil
[0012] However, the utilization rate of molecular sieves in the hydrogen depreciation catalyst in the above-mentioned patents is low, and its catalytic hydrogenation activity and selectivity need to be improved in the actual preparation process of transformer oil base oil, and both of them will increase in the actual use process. The pressure drop of the catalyst bed is reduced, which is not conducive to the long-term operation of the device
At the same time, the high content of molecular sieve in hydrodepressing leads to higher cost of catalyst

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of transformer oil base oil
  • Preparation method of transformer oil base oil
  • Preparation method of transformer oil base oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Weigh the pore volume 1.095mL / g and the specific surface area 328m3 produced by the aluminum sulfate method respectively. 2 Add 500g of pseudo-boehmite 500g of dry basis 71%, 18.4g of nitric acid of concentration 65%, 10g of scallop powder, 71g of carbon black, 60g of nickel nitrate auxiliary agent and 754g of deionized water into the roller compactor and roll and mix , extruded into a cylindrical bar with an outer diameter of 6 mm and an inner hollow diameter of 2.5 mm, and dried the bar to a solid content of 65% under conditions of constant humidity and constant temperature.

[0065] Use punching equipment to punch circular through-holes with a diameter of 1.5mm uniformly arranged on the surface of the cylindrical strip, and make particles with a length of 3mm to 10mm. After drying at 130°C for 8h, bake at 900°C for 3h to get carrier support. body.

[0066] Weigh 7.52g of aluminum sulfate, 320g of silica sol containing 30% of silicon oxide, 2.15g of sodium hydroxide,...

Embodiment 2

[0069] Weigh the pore volume 1.095mL / g and the specific surface area 328m3 produced by the aluminum sulfate method respectively. 2 Add 18.4g of nitric acid 18.4g, 10g of squid powder, 89g of starch, 43.7g of copper nitrate trihydrate auxiliary agent and 754g of deionized water into the roller compactor and grind 500g of pseudo-boehmite with 71% dry basis, 18.4g of nitric acid with a concentration of 65%. Press and mix, extrude into a cylindrical bar with an outer diameter of 6 mm and an inner hollow diameter of 2.5 mm, and dry the bar to a solid content of 65% under constant humidity and constant temperature conditions.

[0070] Use punching equipment to punch circular through-holes with a diameter of 1.5mm uniformly arranged on the surface of the cylindrical strip, and make particles with a length of 3mm to 10mm. After drying at 130°C for 8h, bake at 900°C for 3h to get carrier support. body.

[0071] Weigh 15.53g of aluminum sulfate, 663g of silica sol containing 30% of sil...

Embodiment 3

[0079] A 200mL reactor device was used to conduct a pilot test, and the diesel fraction of a hydrogenation upgrading unit in a factory was used as a raw material (see Table 2 for the properties of the raw material). Transformer oil with a pour point less than -50°C. According to the flow direction of the reaction materials, the special-shaped support body containing the spinel structure and the shape-selective cracking molecular sieve membrane hydrogen depreciation catalyst and a certain amount of SiO are loaded sequentially. 2 Alumina-supported supplementary refined catalysts.

[0080] Wherein, the hydrodecondensation catalyst of the hydrodecondensation reactor is the catalyst prepared in Example 1 and Example 2.

[0081] The supplementary refining catalyst in the hydrogenation supplementary refining reaction zone is based on SiO 2 9wt% γ-Al 2 o 3 is the carrier, W-Mo-Ni is the active component, P is the promoter, and the WO in the catalyst 3 Content is 22wt%, MoO 3 Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Pour pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of transformer oil base oil, and the method comprises the following steps of: sequentially carrying out hydrodewaxing reaction and hydrofinishing reaction on raw oil to obtain the transformer oil base oil. According to the method, a hydrodewaxing catalyst with a specific structure is adopted in the hydrodewaxing reaction process, and the hydrofinishing process is combined, so that the prepared transformer oil base oil is low in pour point and aromatic hydrocarbon content.

Description

technical field [0001] The invention relates to the field of preparation of transformer oil base oil. More specifically, it relates to a preparation method of transformer oil base oil. Background technique [0002] Transformer oil is a liquid insulating heat transfer oil produced from mineral oil, mainly composed of base oil and additives. The performance of transformer oil depends to a large extent on the performance of the base oil. Its performance is related to the composition of the contained hydrocarbons. [0003] For many years, transformer oil was mainly produced from naphthenic crude oil. Due to the lack of naphthenic crude oil resources, the output is not enough to meet the demand of transformer oil. Therefore, countries continue to develop related technologies and processes for producing transformer oil from paraffin-based crude oil, but the output of paraffin-based transformers is still low. my country's naphthenic crude oil resources are relatively sufficient...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10M101/02B01J29/46B01J29/44B01J29/48B01J23/42B01J37/02B01J37/08B01J35/10B01J35/04B01J32/00C10G65/04C10N40/16
CPCC10M101/02B01J29/46B01J29/44B01J23/42B01J29/48B01J37/0201B01J37/0018C10G65/04B01J2229/18C10M2203/1006B01J35/56B01J35/638B01J35/633B01J35/635B01J35/615
Inventor 金吉海甄涛宋君辉焦祖凯张铎严金龙刘丽芝
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com