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Giáo trình Thuật ngữ chuyên ngành Dầu và Khí
UNIT 2 REFINING OPERATIONS
Petroleum refining operations can be separated into five basic areas:
1. Fractionation (distillation) is the separation of crude oil in atmospheric and vacuum distillation towers into different "fractions" or "cuts."
2. Conversion processes change the size and/or structure of hydrocarbon molecules. These processes include:
− Decomposition by thermal and catalytic cracking;
− Unification through alkylation and polymerization;
− Alteration with isomerization and catalytic reforming.
3. Treatment processes may involve chemical or physical separation such drying, precipitation, absorption desalting, including or
as hydrodesulfurizing, solvent refining, sweetening, solvent extraction,…
4. Blending is the process of mixing and combining hydrocarbon fractions, additives and other components to produce finished products with specific performance properties.
5. Other Refining Operations include: process-water treatment and cooling; storage; product movement; hydrogen production; sulfur recovery, …
DEFINITIONS ALKYLATION A process using sulfuric or fluoric acid as a catalyst to combine olefins (usually butylene) and isobutane to produce a high-octane product known as alkylate.
DESALTING Removal of mineral salts (most chlorides, e.g., magnesium chloride and sodium chloride) from crude oil.
HYDRODESULFURIZATION A catalytic process in which the principal purpose is to remove sulfur from petroleum fractions in the presence of hydrogen.
QUESTIONS
How many basic areas can the petroleum refining operations be 1. separated into?
2. What is the purpose of distillation process?
3. How many processes do the conversion processes include?
4. What workshops that belong to decomposition process?
5. What workshops that belong to unification process?
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Giáo trình Thuật ngữ chuyên ngành Dầu và Khí 6. What workshops that belong to alteration process?
7. What is the purpose of alkylation process?
8. What is the purpose of desalting process?
9. What is the purpose of hydrodesulfurization process?
VOCABULARY
/ әb's(cid:31):p∫n/
: hấp thụ absorption
/ 'æditiv/
: chất phụ gia additive
/ ,(cid:31):ltә'rei∫n/
: sự biến đổi alteration
/ 'eәriә/
: khu vực, diện tích area
/ kәn'vә:∫n/
: sự chuyển hóa conversion
/ ,di:k(cid:31)mpә'zi∫n/
decomposition : sự phân huỷ
/ iks'træk∫n/
: sự chiết tách extraction
/ 'fræk∫n/
: phân đoạn, phân số fraction
/ in'klu:d/
: bao gồm, gồm có include
/ in'v(cid:31)lv/
: gồm involve
/ 'm(cid:31)likju:l/
: phân tử molecule
/ 'mu:vmәnt/
: sự di chuyển, vận chuyển movement
/ ,(cid:31)pә'rei∫n/
:Sự hoạt động, vận hành operation
/ pri,sipi'tei∫n/
: sự lắng, kết tủa precipitation
/ ri'k(cid:31)vәri/
: sự thu hồi recovery
/ [ri'fain/
: lọc refine
/ saiz/
: kích cở, kích thước size
/ 's(cid:31)lvәnt/
: dung môi solvent
/ 'st(cid:31):ridʒ/
: sự tồn chứa storage
/ 'str(cid:31)kt∫ә/
structure : cấu trúc
/ 'swi:tniη/
: sự mềm hóa sweetening
/ 'θә:ml/
: thuộc về nhiệt, nhiệt thermal
/ 'tri:tmәnt/
: sự xử lý treatment
/ ,ju:nifi'kei∫n/
: sự hợp nhất unification
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Giáo trình Thuật ngữ chuyên ngành Dầu và Khí
GRAMMAR FOCUS PAST SIMPLE AND PRESENT PERFECT
Present perfect describe an action in the past but this action A always last until now
Example 1:
- Tom is looking for his key. He can’t find it.
- He has lost his key. (present perfect)
Few minutes later:
- Now Tom has found his key. He has it now.
- Has he lost his key? (present perfect)
- No, he hasn’t. He has found it.
- Did he lose his key? (past simple).
- Yes, he did.
- He lost his key (past simple) but now he has found it (present perfect).
Example 2:
- Jack grew a beard but now he has shaved it off. (= he doesn't have a beard now)
- They went out after lunch and they’ve just come back. (= they come back now).
Past simple describe an action in the past and it doesn’t last until B now
- The Chinese invented printing. (not "have invented")
- How many plays did Shakespeare write? (not "has Shakespeare written")
- Beethoven was a great composer. (not 'has been')
Compare:
- Shakespeare wrote many plays.
- My sister is a writer. She has written many books. (she still writes books)
- He was ill last week (He’s all right now)
- He has been ill since last week = He has been ill for a week (He’s ill until now)
Present perfect describe an action has just happened and the C actions following will be used in past simple:
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Giáo trình Thuật ngữ chuyên ngành Dầu và Khí
A: Ow! I’ve burnt myself.
B: How did you do that? (not "have you done").
A: I picked up a hot dish. (not "have picked")
A: Look! Somebody has splilt milk on the carpet.
B: Well, it wasn’t me. I didn’t do it. (not "hasn't been...haven't done")
A: I wonder who it was then. (not "Who it has been")
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Giáo trình Thuật ngữ chuyên ngành Dầu và Khí
