sulfuric acid alkylation unit

Alkylation Process - كلية الهندسة

Alkylation Process Alkylation is the process of producing gasoline range material light olefins (primarily propylene and butylene) with isobutane in the presence of a highly acidic catalyst, either sulfuric acid or hydrofluoric acid. The product (alkylate) contains a mixture …

Alkylating Refinery Grade Propylene - Wood Group

The focus of this paper is to assess the feasibility of modifying an existing alkylation unit to process either refinery-grade or high-purity propylene. Case study results are presented where the modifications needed to revamp an existing 10,000 BPSD butylene sulfuric acid alkylation unit to handle either

Alkylation | FSC 432: Petroleum Refining

Alkylation reactions are catalyzed by strong acids (i.e., sulfuric acid [H 2 SO 4] and hydrofluoric acid [HF]) to take place more selectively at low temperatures of 70°F for H 2 SO 4 and 100°F for HF. By careful selection of the operating conditions, a high proportion of products can fall in the gasoline boiling range with motor octane ...

Alkylation Unit Monitoring FINAL 2008 - DuPont USA

Alkylation Unit Monitoring Page 2 II. ALKYLATION UNIT FEED STREAMS Figure 1 shows a block flow diagram for an alkylation unit. The two main feed streams, olefin feed and makeup isobutane, are highlighted. Figure 1 - Typical Alkylation Unit Feed Streams ALKYLATION REACTION

HYDROFLUORIC ACID IN U.S. REFINERIES

commented that staffing levels were too low to ensure the safe operation of alkylation units. Alternatives to HF: There are other ways to perform alkylation in an oil refinery. Some refineries use a modified form of HF containing a chemical which renders it less volatile. Others use sulfuric acid instead of HF.

Intro to Alkylation Chemistry - DuPont USA

strong acid catalyst. Although alkylation can take place at high temperature without catalyst, the only processes of commercial importance involve low to moderate temperatures using either sulfuric or hydrofluoric acid. Alkylation reactions are complex and consequently the product has a …

STRATCO® Alkylation Technology - cleantechnologies.dupont.com

The STRATCO® Alkylation Technology is a sulfuric acid catalyzed process that converts low-value, straight-chain olefins into high-value, branched components called alkylate. Alkylate, with its superior blending properties, is a key component for clean gasoline.

Alky Unit Applications - YouTube

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Alkylation unit | McKinsey Energy Insights

Alkylation unit. Also known as: alky. ... C3s, or a mix) is injected into a series of reaction chambers filled with an acid catalyst. The acid is either sulfuric acid (H2SO4) or hydrofluoric acid (HF). The catalyst causes the isobutane to combine with the olefin to produce either …

Technical service agreement for sulfuric acid alkylation

Technical service agreement for sulfuric acid alkylation. A strategic partnership to maximise alkylation unit performance. Maximizing the performance of your alkylation unit is a high priority, but challenging in today’s world with a changing workforce, increased workloads, and technology advances. ...

Shutting Down A Sulfuric Acid Alkylation Unit Reactor ...

Shutting Down A Sulfuric Acid Alkylation Unit Reactor. ... Required pretreatment levels are projected to be no more than equivalent to that normally associated with sulfuric acid units. The process flow scheme for the AlkyClean process is similar to that employed for current liquid acid technologies. As illustrated in the block flow diagram in ...

Alkylation unit - Howling Pixel

Alkylation unit. An alkylation unit is one of the conversion processes used in petroleum refineries.It is used to convert isobutane and low-molecular-weight alkenes (primarily a mixture of propene and butene) into alkylate, a high octane gasoline component.The process occurs in the presence of a strong acting acid such as sulfuric acid or hydrofluoric acid (HF) as catalyst.

US5284990A - Method for converting a hydrogen fluoride ...

A method for converting HF alkylation unit to a sulfuric acid alkylation unit comprising the steps of retaining a reactor, an acid settler and a fractionation section from the HF alkylation unit and modifying at least a portion of the HF alkylation unit to produce a converted alkylation unit that is adapted to use sulfuric acid as a reaction catalyst.

Refining Technologist - Sulfuric Acid Alkylation

•Lead the Sulfuric Acid Alkylation Advisory group through developing and implementing a technology business plan and best practices to drive refinery performance. Conduct annual Unit Reviews for all Sulfuric Acid Alkylation units to assess progress in achieving goals and develop scorecard to …

Alkylation unit - Wikipedia

An alkylation unit is one of the conversion processes used in petroleum refineries.It is used to convert isobutane and low-molecular-weight alkenes (primarily a mixture of propene and butene) into alkylate, a high octane gasoline component.The process occurs in the presence of a strong acting acid such as sulfuric acid or hydrofluoric acid (HF) as catalyst.

Industrial: Refining: Alkylation Units - MEI

Alkylation processes use either sulfuric or hydrofluoric acid as the catalyst to promote the alkylation reaction. Each catalyst has different operating temperatures and pressures, and the sulfuric acid is liquid at unit operating conditions, unlike hydrofluoric acid which is a gas at unit operating conditions.

HF vs. sulfuric for alkylation catalyst. - Petroleum ...

Jul 07, 2007· The following thread, in the Chemical plant design & operations Forum, describes corrosion problems using 98% sulfuric acid in an alkylation unit. Refinery Alkylation Unit - Metallurgy Upgrade thread124-187428: Refinery Alkylation Unit - Metallurgy Upgrade Recently, the proposed use of hydrofluoric acid (rather than sulfuric acid) as alkylation ...

Sulfuric Acid Alkylation Unit - Shutdown Procedure ...

Jul 23, 2007· Sulfuric Acid Alkylation Unit - Shutdown Procedure - posted in Refining, Hydrocarbons, Oil, and Gas: Why is it necessary to empty complete Alkylation Unit when unit is in circulation/shutdown regime more than 72 hours? Why is it necessary to perform neutralization and empty the complete unit instead of having time-unlimited isobutane circulation when following conditions are provided:1.

Sulfuric Acid Alkylation - NMR Testing Laboratory

NMR Application – Sulfuric Acid Alkylation The alkylation unit control system provides composition measurement and control solutions to reduce or eliminate problems characteristic of sulfuric acid alkylation unit operation. The system applies NMR technology for stream composition analyses with tightly integrated advanced process control to deliver optimum unit performance.

Alkylation - Wikipedia

Typical catalysts are zeolites, i.e. solid acid catalysts, and sulfuric acid. Silicotungstic acid is used to manufacture ethyl acetate by the alkylation of acetic acid by ethylene: C 2 H 4 + CH 3 CO 2 H → CH 3 CO 2 C 2 H 5 In biology. Methylation is the most common type of alkylation. ...

INTRODUCTION TO SULFURIC ACID ALKYLATION UNIT ... - …

paper, only sulfuric acid catalyzed alkylation is considered. This paper will discuss the technical issues involved in the design of a sulfuric acid alkylation unit. More specifically, the design of a STRATCO Effluent Refrigerated Sulfuric Acid Alkylation Process will be discussed.

What is Alkylation? - WorldOfChemicals

In oil refining: In alkylation of petroleum, gaseous hydrocarbons or isoparaffins are combined with olefins or alkenes. This process is called an Alkylation unit. Isobutene and alkenes with low molecular weight are converted into a high octane gasoline compound, alkylate. An acid catalyst such as sulfuric acid or hydrofluoric acid is also used ...

U.S. Alkylation | Stratas Advisors

The alkylation of mixtures of light olefins is a major process in oil refineries because the end product – mainly synthetic C7-C8 alkylate – provides valuable antiknock properties to gasoline. The standard alkylation process involves an alkyl group transfer reaction in the presence of an acid catalyst: either hydrofluoric (HF) or sulfuric acid.

SAFETY DATA SHEET - Valero

Sulfuric acid 7664-93-9 88 - 92 Chemical name CAS number % Distillates (petroleum), alkylate 64741-73-7 6 - 8 Diethyl sulfate 64-67-5 <0.2 Dimethyl sulfate 77-78-1 <0.2 Composition comments This product is a blend of sulfuric acid and hydrocarbon produced in a sulfuric acid based petroleum alkylation unit.

STRATCO® Sulfuric Acid Alkylation Services and Solutions

We leverage the sulfuric acid alkylation know-how DuPont has obtained through our world-leading STRATCO® Alkylation Technology licensing solutions to provide a comprehensive suite of products, solutions, and ongoing support to existing alkylation units with a focus on reliability, operability, the environment, and safety.

Lower costs for converting alkylation units from ...

For petroleum refineries, the cost of converting hydrofluoric-acid-based alkylation units to the relatively safer sulfuric-acid-based alkylation process (diagram) has been cost-prohibitive and has lacked specific economic benefits. Now, DuPont (Wilmington, Del.; p>

CDAlky® Alkylation Technology - CB&I

in commercial service since 2013. Four units are now in commercial operation with more in construction or design. The CDAlky process is the most advanced sulfuric acid alkylation technology. The technology is simple, innovative, flexible and robust with respect to both feedstock and operation. Until now, sulfuric acid alkylation is

Sulfuric acid alkylation technical services

Sulfuric acid alkylation technical services. Maximise the performance of your alkylation unit. As the world leader in sulfuric acid alkylation, DuPont has extensive experience and know-how that can support your alkylation unit, either on an as needed or ongoing basis. Whether it’s troubleshooting, optimizing operations, supporting maintenance ...

Petroleum refining - Polymerization and alkylation ...

Hydrofluoric acid is also used as a catalyst for many alkylation units. The chemical reactions are similar to those in the sulfuric acid process, but it is possible to use higher temperatures (between 24 and 46 °C, or 75 to 115 °F), thus avoiding the need for refrigeration.

Alkylation Technology Study FINAL REPORT - aqmd.gov

Plot area for a Sulfuric Acid Alkylation unit (without onsite acid regeneration) or Solid Acid Alkylation unit is comparable to that for an HF Alkylation unit, although this is somewhat dependent on the capacity of the unit, as a large capacity alkylation unit would require multiple reactors for sulfuric acid or solid catalyst systems. If onsite

Alkylation Unit - SlideShare

May 28, 2014· Other PPE to be provided includes: Face shield, goggles or acid resistance gauntlets- To protect the eyes from HF and sulfuric acid. Acid resistance gloves- to protect the hands from HF and sulfuric acid in the alkylation unit. Acid resistance boots and coverall- To protect the feet and body from acid burns. Air-supplied respirator (self ...

Alkylation is an important source for octane in gasoline ...

Either sulfuric or hydrofluoric acid is used as the catalyst for the alkylation reaction. Alkylate is high in octane but has low volatility and can be added to motor gasoline and aviation gasoline to increase octane while meeting stringent volatility specifications.

Refinery Operations | » Expanding Alkylation Unit Capacity

In this aspect, acid consumption remains a significant operating expense for many sulfuric acid (H 2 SO 4) alkylation units. One technology supplier, CDTECH claims to have developed an alkylation process (CDAlky) that produces top quality alkylate while reducing H 2 SO 4 consumption, thereby mitigating the expense [of regeneration]. According ...

Results of alkylation unit hazard, operability study are ...

The authors describe and illustrate a sulfuric acid alkylation unit with a horizontal contact. As a result of the use of this design solution, the isobutane/olefin ratio is 10/1 in comparison with 4/1 to 5/1 in the other types of units, namely vertical reactors and cascade tank reactors. The unit was designed to process the butane-butylene cut ...

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