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GB1362894A - Means and method for controlling the strength of acid in an alkylation unit - Google Patents

Means and method for controlling the strength of acid in an alkylation unit

Info

Publication number
GB1362894A
GB1362894A GB3157572A GB3157572A GB1362894A GB 1362894 A GB1362894 A GB 1362894A GB 3157572 A GB3157572 A GB 3157572A GB 3157572 A GB3157572 A GB 3157572A GB 1362894 A GB1362894 A GB 1362894A
Authority
GB
United Kingdom
Prior art keywords
acid
strength
rate
fresh
olefin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3157572A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texaco Development Corp
Original Assignee
Texaco Development Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texaco Development Corp filed Critical Texaco Development Corp
Publication of GB1362894A publication Critical patent/GB1362894A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
    • C07C2/54—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by addition of unsaturated hydrocarbons to saturated hydrocarbons or to hydrocarbons containing a six-membered aromatic ring with no unsaturation outside the aromatic ring
    • C07C2/56—Addition to acyclic hydrocarbons
    • C07C2/58—Catalytic processes
    • C07C2/62—Catalytic processes with acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0086—Processes carried out with a view to control or to change the pH-value; Applications of buffer salts; Neutralisation reactions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S208/00—Mineral oils: processes and products
    • Y10S208/01—Automatic control

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Feedback Control In General (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)

Abstract

1362894 Automatic control TEXACO DEVELOPMENT CORP 6 July 1972 [5 Aug 1971] 31575/72 Heading G3R [Also in Division C5] In alkylation apparatus, where an olefin is reacted with an isoparaffin in the presence of an acid catalyst, to form an acid-hydrocarbon mixture that is then separated, a portion of the acid being recycled and the remainder being discharged and replaced by fresh acid, the strength of the acid is regulated according to the actual acid strength, and the olefin input composition and flow-rate. As shown, butylene or propylene is reacted with isobutance in mixer 4, using a sulphuric acid catalyst, the resultant mix being separated in settler 12 into hydrocarbons, discharged through line 14, and acid, recycled by pump 20, a portion of the acid being discharged via line 21, fresh acid entering through line 17. The acid discharge flow-rate, as detected by sensor 33, is maintained at a required value from set point means 28. This value is varied according to an average acid strength signal, calculated using analogue or digital techniques from the time of titration of an acid sample with caustic as determined by programmer 27, and an anticipated required value which is calculated from the olefin input flow-rate from sensor 40, and input composition from chromatograph 38. The discharge flow-rate is thus adjusted for each acid sample taken, using the programmer 27 to start and stop the acid analysis, and to recycle the apparatus. If for example the acid strength is too low, acid discharge is increased, with subsequent increase of inflow of fresh acid to maintain the liquid level in settler 12 at a pre-set value, and thus regulate the acid strength. Circuits 27, 28, 35 and 36 are described with reference to Figs. 2-6 (not shown).
GB3157572A 1971-08-05 1972-07-06 Means and method for controlling the strength of acid in an alkylation unit Expired GB1362894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16944371A 1971-08-05 1971-08-05

Publications (1)

Publication Number Publication Date
GB1362894A true GB1362894A (en) 1974-08-07

Family

ID=22615727

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3157572A Expired GB1362894A (en) 1971-08-05 1972-07-06 Means and method for controlling the strength of acid in an alkylation unit

Country Status (11)

Country Link
US (1) US3729624A (en)
JP (1) JPS544638B2 (en)
AU (1) AU466677B2 (en)
BE (1) BE787018A (en)
BR (1) BR7205158D0 (en)
CA (1) CA982612A (en)
FR (1) FR2149896A5 (en)
GB (1) GB1362894A (en)
IT (1) IT963769B (en)
NL (1) NL159513B (en)
SE (1) SE396374B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3864346A (en) * 1971-08-05 1975-02-04 Texaco Inc Means and method for controlling the strength of acid in an alkylation unit
US3819917A (en) * 1972-08-16 1974-06-25 Texaco Inc Means and method for controlling the hydrocarbon content of recycle acid in an alkylation unit
US4482969A (en) * 1982-03-09 1984-11-13 Phillips Petroleum Company Control of an alkylation reactor
US4554499A (en) * 1983-05-03 1985-11-19 Genentech, Inc. Computer controlled motor
US5707923A (en) * 1995-05-01 1998-01-13 Stratco, Inc. Method of and apparatus for controlling an alkylation process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002818A (en) * 1956-11-28 1961-10-03 Phillips Petroleum Co Process control system
US3173969A (en) * 1961-11-17 1965-03-16 Standard Oil Co Method and apparatus for determining the titratable acidity of spent sulfuric alkylation acid
US3325391A (en) * 1963-12-06 1967-06-13 Petrolite Corp Hydrocarbon purification
US3442972A (en) * 1965-10-12 1969-05-06 Stratford Eng Corp Alkylation of alkyl sulfates
US3513220A (en) * 1968-01-19 1970-05-19 Chevron Res Specific gravity analyzer for control of an alkylation process
US3625655A (en) * 1969-12-02 1971-12-07 Texaco Inc Acid analyzer

Also Published As

Publication number Publication date
US3729624A (en) 1973-04-24
JPS544638B2 (en) 1979-03-08
NL7210394A (en) 1973-02-07
DE2237983B2 (en) 1976-01-22
SE396374B (en) 1977-09-19
JPS4826704A (en) 1973-04-09
BR7205158D0 (en) 1973-06-12
AU4457472A (en) 1974-01-17
IT963769B (en) 1974-01-21
AU466677B2 (en) 1975-11-06
FR2149896A5 (en) 1973-03-30
DE2237983A1 (en) 1973-02-01
BE787018A (en) 1973-01-31
CA982612A (en) 1976-01-27
NL159513B (en) 1979-02-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee