GB856331A - Process for conducting chemical reactions - Google Patents

Process for conducting chemical reactions

Info

Publication number
GB856331A
GB856331A GB33688/57A GB3368857A GB856331A GB 856331 A GB856331 A GB 856331A GB 33688/57 A GB33688/57 A GB 33688/57A GB 3368857 A GB3368857 A GB 3368857A GB 856331 A GB856331 A GB 856331A
Authority
GB
United Kingdom
Prior art keywords
liquid
filter
withdrawn
reaction zone
returned
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
GB33688/57A
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.)
FMC Corp
Original Assignee
FMC Corp
Food Machinery and Chemical 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 FMC Corp, Food Machinery and Chemical Corp filed Critical FMC Corp
Publication of GB856331A publication Critical patent/GB856331A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In an example, a 10 % wt solution of ethyl anthraquinone in a mixture of 40 parts by volume of benzene and 60 parts by volume of diisobutyl carbinol is hydrogenated at 30 DEG C. in the presence of a suspended hydrogenation catalyst such as Raney nickel or palladium on a carrier until 50% of the quinone has been reduced to the corresponding hydroquinone: some of the liquid is then withdrawn from the reaction zone through a filter positioned therein whilst a quantity of fresh solution equal to that removed is added. 50 alternating pulsations per minute are applied by means of a filter pump to the liquid being withdrawn in such manner that 1/3 of the liquid passing out of the reaction zone through the filter is returned therethrough, thus keeping the filter clear of suspended particles.ALSO:In conducting a reaction involving a liquid containing a suspended solid wherein some of the liquid is continuously withdrawn from the reaction zone through a filter positioned therein and fresh reactant liquid is continuously added to the reaction zone, an alternating pulsating movement of liquid through the filter is established at 1-500 pulses/minute, whereby a part of the liquid thus withdrawn is periodically returned to the reaction zone through the filter, which is thereby kept clear of solid particles. The suspended solid may be a catalyst used for hydrogenating a substituted anthraquinone in an inert solvent e.g. Raney-nickel or palladium on a carrier (see Group IV(b)). A number of embodiments is described and illustrated: for instance in Fig. 3 liquid <PICT:0856331/III/1> from the reactor 34 is withdrawn by pump 32 through filter 33 into line 35 containing valve 36 on the suction stroke. On the pressure stroke the liquid is expelled through line 37 containing valve 38 except when reducing valve 52 is periodically opened. A further valve may be installed in line 37 thus controlling the quantity of liquid returned through the filter. A stirrer 53 is preferably provided in the reactor. Preferably the particle size of the catalyst is 0.001-0.833 mm. and 20-70% of the filtered liquid is returned through the filter.
GB33688/57A 1956-11-09 1957-10-29 Process for conducting chemical reactions Expired GB856331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE856331X 1956-11-09

Publications (1)

Publication Number Publication Date
GB856331A true GB856331A (en) 1960-12-14

Family

ID=6789302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33688/57A Expired GB856331A (en) 1956-11-09 1957-10-29 Process for conducting chemical reactions

Country Status (1)

Country Link
GB (1) GB856331A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168907A (en) * 1984-12-20 1986-07-02 British Petroleum Co Plc Filtration
GB2269114A (en) * 1992-07-31 1994-02-02 Pall Corp Recovering catalyst by filtration
US5628916A (en) * 1994-08-17 1997-05-13 Pall Corporation Method for filtering edible oils
CN117181164A (en) * 2023-09-18 2023-12-08 西安国康瑞金制药有限公司 A kind of preparation device and method of benzoyl corylide

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168907A (en) * 1984-12-20 1986-07-02 British Petroleum Co Plc Filtration
GB2168907B (en) * 1984-12-20 1989-04-12 British Petroleum Co Plc Separation process
GB2269114A (en) * 1992-07-31 1994-02-02 Pall Corp Recovering catalyst by filtration
GB2269114B (en) * 1992-07-31 1995-10-18 Pall Corp Method of removing catalyst
US5690836A (en) * 1992-07-31 1997-11-25 Pall Corporation Method of removing catalyst
US5628916A (en) * 1994-08-17 1997-05-13 Pall Corporation Method for filtering edible oils
CN117181164A (en) * 2023-09-18 2023-12-08 西安国康瑞金制药有限公司 A kind of preparation device and method of benzoyl corylide

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