Wax deoiling technology for the future - Sulzer

deoiling process purifies the wax but also increases the hardness and congealing point of the paraffin wax, both important quality criteria. Change of market Today, the global annual demand for wax is about 4.4 million tons, whereby the most-produced wax types are recov - ered from crude oil. Of the total wax

Chemical Treatment of Petroleum Products

Chemical Treatment of Petroleum Products The aims of chemical treatment is to remove the impurities, such as sulfur, nitrogen, oxygen, asphaltene, unsaturated compounds and some aromatics compounds at low temperature. Treatment processes for the removal of impurities compounds are much less severe than the hydrotreating processes.

Cyclonic gas stripping deoiling and gas flow acceleration ...

Jul 20, 2018· The oily catalysts are added by a screw feeder and transported by the high-temperature gas to enter the gas stripping cyclone for deoiling. The deoiled dry catalyst particles slide into the gas flow acceleration classifier for the activity classification.

Recycling and Recovery Routes for Spent Hydroprocessing ...

Recycling and Recovery Routes for Spent Hydroprocessing Catalyst Waste Article in Industrial & Engineering Chemistry Research 52(36):12794–12801 · August 2013 with …

Denox Process - kasravand.com

Denox Process The most effective process to date for flue gas NOx removal in power plants is known as selective catalytic reduction (SCR). It operates at temperatures of between 300 °C and 400°C on the reaction principle that is shown in Fig. 1 and may be summarized by the following equations:

US20070025899A1 - Process for metals recovery from spent ...

The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

A. SOLVENT EXTRACTION AND DEWAXING - Chemical …

A. SOLVENT EXTRACTION AND DEWAXING . 1.Description . Solvent treating is a widely used method of refining lubricating oils as well as a host of other refinery stocks. Since distillation (fractionation) separates petroleum products into groups only by their boiling-point ranges, impurities may remain.

Dewaxing by a combination centrifuge/catalytic process ...

Oct 16, 1984· The partially dewaxed oil streams obtained from the first chilling/centrifugation process and that obtained from the deoiling of the hard wax, are mixed. The combined stream is then catalytically dewaxed in the presence or absence of H 2 over a suitable catalytic dewaxing catalyst to the required dewaxed oil targets.

Spent-caustic treating technology converts waste into ...

Deoiling does not remove any substantial amount of the dissolved hydrocarbon in the spent caustic because of the low net effective extract-to-raffinate phase flow rates ratio that is used in the ...

Recycling of waste spent catalyst in road construction and ...

Waste spent catalyst is generated in Oman as a result of the cracking process of petroleum oil in the Mina Al-Fahl and Sohar Refineries. The disposal of spent catalyst is of a major concern to oil ...

PROCESS FOR SEPARATING AND RECOVERING METALS

Nov 27, 2014· A process for treating spent catalyst containing heavy metals, e.g., Group VIB metals and Group VIII metals is provided. In one embodiment after deoiling, the spent catalyst is treated with an ammonia leach solution under conditions sufficient to dissolve the group VIB metal and the Group VIII metal into the leaching solution, forming a leach slurry.

Process Reactor Technologies - torftech.com

processing 3,000 tonnes per year of SPL was commissioned. The process has proved to be as effective as predicted and by the end of 1994, the plant capacity was increased to 10,000 tonnes per year. This is a well-proven industrial application of the TORBED technology. 1m diameter reactor used for SPL processing

Process to recover metals from spent catalyst - Shell Oil ...

Jan 30, 2001· As mentioned, a residual catalyst typically arrives containing free oil, while an HDS typically contains less oil. It is desirable to remove the oils as one of the initial process steps. The HDS catalyst should remain dry prior to the deoiling process, wherein dry as used herein means water-free.

Oil removal of spent hydrotreating catalyst CoMo/Al2O3 via ...

Deoiling process is a key issue for recovering metal values from spent hydrotreating catalysts. The oils can be removed with organic solvents, but the industrialized application of this method is ...

THE ROTARY KILN - FEECO International Inc.

THE ROTARY KILN HANDBOOK FEECO International was founded in 1951 as an engineering and equipment manufacturer. We quickly became known as the material experts, able to solve all sorts of material processing and handling problems,

US4661265A - Catalyst deoiling process - Google Patents

An improved deoiling process is provided for removing substantial amounts of oil from spent catalyst withdrawn from resid hydrotreating units. In the process, a slurry of spent catalyst and oil is spirally conveyed at an upward angle of inclination in a spiral classifier. Oil is drained from the upwardly spiraling slurry to substantially separate the oil from the spent catalyst.

Recycling and Recovery Routes for Spent Hydroprocessing ...

In the extraction process, metals were recovered through pyrometallurgical and hydrometallurgical routes. The possibility of recycling of total spent catalyst (TSC) was studied using various steps such as deoiling, drying, grinding, sieving, and decoking.

Hydroprocessing catalysts and methods for making thereof ...

Jun 30, 2015· In another embodiment, the deoiling process further comprises a subsequent liquid/solid separation step for the recovery of deoiled spent catalyst. The deoiling process in one embodiment employs a filtration process such as cross-flow filtration, dynamic filtration, microfiltration, and combinations thereof, which may or may not include the use ...

Wax Hydrotreatment - Axens

Wax Hydrotreatment. Waxes coming from Deoiling need a final hydrotreatment to be used in food applications. Merits of Axens Solutions' process are as follows: no sludge disposal problems, easy and reliable operation, great flexibility of use, low operating cost,

Deoiling of oil-coated catalyst using high-speed ...

The oily catalyst samples to be used in experiment were weighed and recorded as m 1. After deoiling in cyclone, samples m 2 were collected and extracted by petroleum ether in the boiling range of 60–90 °C, evaporated at 95 °C after until the weight has stabilised to get the oil-free samples m 3.

Refi ning Processes Index • Company Index • Refi ning ...

• Refi ning Processes Index • Company Index • Refi ning Articles • E quipment and Services Providers. ... Dewaxing/wax deoiling Diesel upgrading Diesel—ultra-low-sulfur diesel (ULSD) Electrical desalting ... "The Process: A new solid acid catalyst gasoline alkylation technology," NPRA 2002 Annual Meeting, March 17–19, 2002. ...

Oil removal from spent HDT catalyst by an aqueous method ...

The contact angle of oily spent HDT catalyst is 98.7° (Fig. 5(a)), and the contact angle of spent HDT catalyst reduces to 57.2° after doiling process with help of ultrasound (Fig. 5(b)). The main compositions of spent HDT catalyst after deoiling are Al, O, Mo, C and Co .

US7736607B2 - Process for metals recovery from spent ...

The process of this invention is directed to the removal of metals from an unsupported spent catalyst. The catalyst is subjected to leaching reactions. Vanadium is removed as a precipitate, while a solution comprising molybdenum and nickel is subjected to further extraction steps for the removal of these metals. Molybdenum may alternately be removed through precipitation.

Options and processes for spent catalyst handling and ...

Journal of Hazardous Materials B101 (2003) 123–132 Options and processes for spent catalyst handling and utilization M. Marafi ∗, A. Stanislaus Petroleum Refining Department, Petroleum ...

Catalytic dehazing of heavy lube oil - A chevron case ...

The process uses a catalyst downstream of the solvent dewaxer to remove inadvertent wax contaminants. The catalyst was loaded in the upper portion of an existing hydrofinishing reactor so that there were no expenditures for new equipment. Since the process went onstream in the fall of 1985, the heavy neutral lube oil has been consistently haze ...

Ultrasound-assisted oil removal of γ-Al2O3-based spent ...

The spent HDS catalyst provided by a Chinese oil company was used in this work. The spent catalyst used in deoiling process is a rod-like particle with the length of about 3–5 mm and the diameter of about 2 mm. The surface of the spent catalyst is surrounded by a black oily substance with the …

Catalyst deoiling process - Amoco Corporation

Apr 28, 1987· Advantageously, the deoiling process is effective, efficient, and environmentally beneficial. In the novel deoiling process, a slurry of spent catalyst and reactor oil is initially cooled to a temperature below the flash point of the oil. While the slurry can be water-cooled, it …

Oil removal of spent hydrotreating catalyst CoMo/Al2O3 via ...

Nov 15, 2016· Deoiling process is a key issue for recovering metal values from spent hydrotreating catalysts. The oils can be removed with organic solvents, but the industrialized application of this method is greatly hampered by the high cost and complex processes.

Chevron Lummus Global LC-SLURRY Technology for VR …

The LC-SLURRY process can be used to convert nearly of heavy oils/ solvent deasphalting ( SDA) tar to high -value products. This new techno logy is based on a unique, high- activity catalyst that is recycled and recovered in the process (ISOSLURRY™ catalyst), eliminating fouling concerns associated with other catalyst or additive systems.

US4477333A - Dewaxing by a combination centrifuge ...

US4477333A US06/552,701 US55270183A US4477333A US 4477333 A US4477333 A US 4477333A US 55270183 A US55270183 A US 55270183A US 4477333 A US4477333 A US 4477333A Authority US United States Prior art keywords stream oil solvent wax dewaxing Prior art date 1982-09-29 Legal status (The legal status is an assumption and is not a legal conclusion.