SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                               ________________

                               Amendment No. 19
                                      to
                                SCHEDULE 14D-9

                 (AS AMENDED AND RESTATED AT JANUARY 6, 1998)

                Solicitation/Recommendation Statement Pursuant
                          to Section 14(d)(4) of the
                        Securities Exchange Act of 1934
                               ________________

                              SAFETY-KLEEN CORP.
                           (Name of Subject Company)


                              SAFETY-KLEEN CORP.
                     (Names of Person(s) Filing Statement)

                    Common Stock, Par Value $0.10 Per Share
            (Including the Associated Common Share Purchase Rights)
                        (Title of Class of Securities)

                                   786484105
                     (CUSIP Number of Class of Securities)

                              DONALD W. BRINCKMAN
                     Chairman And Chief Executive Officer
                               One Brinckman Way
                          Elgin, Illinois  60123-7857
                                (847) 697-8460

                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications
                 on Behalf of the Person(s) filing Statement)

                               ________________

                                With a copy to:
                            DENNIS N. NEWMAN, ESQ.
                         Sonnenschein Nath & Rosenthal
                                  Sears Tower
                           Chicago, Illinois  60606
                                (312) 876-8000

 
                                  INTRODUCTION

     Safety-Kleen Corp. ("Safety-Kleen") hereby amends and supplements its
Solicitation/Recommendation Statement on Schedule 14D-9, as amended and restated
at January 6, 1998 and amended on January 9, 1998, January 12, 1998, January 14,
1998, January 16, 1998, January 20, 1998, January 21, 1998, January 26, 1998,
January 27, 1998, February 4, 1998, February 9, 1998, February 11, 1998,
February 13, 1998, February 17, 1998, February 17, 1998, February 19, 1998,
February 23, 1998 and February 23, 1998 (as amended, the "Schedule 14D-9"), with
respect to the exchange offer made by LES Acquisition, Inc., a wholly-owned
subsidiary of Laidlaw Environmental Services, Inc., for all of the outstanding
Shares. Capitalized terms not defined herein have the meanings assigned thereto
in the Schedule 14D-9.

Item 8.  Additional Information to be Furnished.

     Item 8 of the Schedule 14D-9 is hereby amended and supplemented by adding
the following text thereto:

          On February 25, 1998, Safety-Kleen announced in a press release that
     in accordance with the determination of its Board of Directors, it
     adjourned its special meeting of shareholders scheduled to be held at 3
     p.m. on February 25. The Board elected to adjourn the meeting until Monday,
     March 9, 1998, at 3 p.m. at The Elgin Community College Business Conference
     Center, to allow shareholders the opportunity to cast a fully informed vote
     on the merger. A copy of the press release is attached hereto as Exhibit 44
     and is incorporated herein by reference.

          On February 25, 1998, Safety-Kleen also announced in a press release 
     that, based upon a preliminary count by its proxy solicitor Chase Mellon of
     proxies it has received, those proxies represent approximately 70% of the
     outstanding Shares, of which more than two-thirds are in favor of the
     Philip Merger. A copy of the press release is attached hereto as Exhibit 45
     and is incorporated herein by reference.

          On February 26, 1998, Philip issued the press release attached hereto
     as Exhibit 45, which press release is incorporated herein by reference.

Item 9.  Materials to be Filed as Exhibits.

     Item 9 of the Schedule 14D-9 is hereby amended and supplemented by adding
the following text thereto:

     Exhibit 44   Press Release issued by Safety-Kleen on February 25, 1998.
     Exhibit 45   Press Release issued by Safety-Kleen on February 25, 1998. 
     Exhibit 46   Press Release issued by Philip Services Corp. on February 26,
                  1998.


 
                                   SIGNATURE
                                        

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                         SAFETY-KLEEN CORP.



                         By:  /s/  Donald W. Brinckman
                            -------------------------------------------------
                              Name: Donald W. Brinckman
                              Title: Chairman and Chief Executive Officer

Dated: February 25, 1998

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                                 EXHIBIT INDEX


     Except as noted below, the following Exhibits have been previously filed in
connection with this Statement.



Exhibit No.                             Description
- ----------- --------------------------------------------------------------------
         
Exhibit 1   Excerpts from Safety-Kleen's Proxy Statement, dated March 28, 1997,
            relating to Safety-Kleen's 1997 Annual Meeting of Shareholders.

Exhibit 2   Share Ownership of Certain Beneficial Owners and Management.

Exhibit 3   Agreement and Plan of Merger, dated as of November 20, 1997, by and
            among SK Parent Corp., SK Acquisition Corp. and Safety-Kleen Corp.

Exhibit 4   Form of Change of Control Severance Agreement.

Exhibit 5   Letter to Shareholders of Safety-Kleen, dated January 6, 1998.

Exhibit 6   Press Release issued by Safety-Kleen Corp., dated December 22, 1997.

Exhibit 7   Text of September 24, 1997 letter from Laidlaw Environmental
            Services, Inc.

Exhibit 8   Text of November 4, 1997 letter from Laidlaw Environmental Services,
            Inc.

Exhibit 9   Text of November 13, 1997 letter from Laidlaw Environmental
            Services, Inc.

Exhibit 10  Complaint filed by Safety-Kleen Corp. v. Laidlaw Environmental
            Services, Inc. (dated November 17, 1997, United States District
            Court for the Northern District of Illinois Eastern Division).

Exhibit 11  Opinion of William Blair & Company L.L.C., dated November 20, 1997.

Exhibit 12  Text of November 20, 1997 letter from Laidlaw Environmental
            Services, Inc.

Exhibit 13  Verified Answer, Affirmative Defenses, and Counterclaim filed by
            Laidlaw Environmental Services, Inc. v. Safety-Kleen Corp., et. al.
            (dated November 24, 1997, United States District Court for the
            Northern District of Illinois Eastern Division).

Exhibit 14  Opinion of William Blair & Company L.L.C., dated December 20, 1997.

Exhibit 15  Complaint filed by William Steiner against Donald W. Brinckman, et
            al. (dated November 4, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).

Exhibit 16  Complaint filed by Josh Kaplan against Donald W. Brinckman, et al.
            (dated November 5, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).


                                      -3-





Exhibit No.                             Description
- ----------- --------------------------------------------------------------------
         
Exhibit 17  Complaint filed by Gershon Knoll against Richard T. Farmer, et al.
            (dated November 5, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).

Exhibit 18  Complaint filed by Larry Hanon against Safety-Kleen Corp. et al.,
            (dated November 5, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).

Exhibit 19  Complaint filed by Robin Fernhoff against Safety-Kleen Corp., et al.
            (dated November 6, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).

Exhibit 20  Complaint filed by Epstein Family Trust against Safety-Kleen Corp.,
            et al. (dated November 12, 1997, Circuit Court of Cook County,
            Illinois County Department, Chancery Division).

Exhibit 21  Complaint filed by David Steinberg against Safety-Kleen Corp., et
            al. (dated December 5, 1997, Circuit Court of Cook County, Illinois
            County Department, Chancery Division).

Exhibit 22  Press Release issued by Safety-Kleen Corp., dated January 8, 1998.

Exhibit 23  Press Release issued by Safety-Kleen Corp., dated January 9, 1998.

Exhibit 24  Definitive Additional Materials.

Exhibit 25  Press Release issued by Safety-Kleen Corp., dated January 15, 1998.

Exhibit 26  Definitive Additional Materials.

Exhibit 27  Definitive Additional Materials.

Exhibit 28  Definitive Additional Materials.

Exhibit 29  Press Release issued by Safety-Kleen Corp., dated January 27, 1998.

Exhibit 30  Press Release issued by Safety-Kleen Corp., dated February 4, 1998.

Exhibit 31  Letter to Shareholders of Safety-Kleen Corp., dated February 2,
            1998.

Exhibit 32  Press Release issued by Safety-Kleen Corp., dated February 2, 1998.

Exhibit 33  Opinion of William Blair & Company L.L.C., dated January 31, 1998.

Exhibit 34  Press Release issued by SK Parent, dated February 10, 1998.
 

                                      -4-





Exhibit No.                             Description
- ----------- --------------------------------------------------------------------
         
Exhibit 35  Letter to Shareholders of Safety-Kleen Corp., dated February 12,
            1998.

Exhibit 36  Press Release issued by Safety-Kleen Corp., dated February 13, 1998.

Exhibit 37  Press Release issued by Safety-Kleen Corp., dated February 16, 1998.

Exhibit 38  Press Release issued by Safety-Kleen Corp., dated February 18, 1998.

Exhibit 39  Press Release issued by Philip Services Corp., dated February 20,
            1998.

Exhibit 40  Press Release issued by SK Parent Corp. dated February 20, 1998.

Exhibit 41  Press Release issued by Safety-Kleen Corp., dated February 20, 1998.

Exhibit 42  Definitive Additional Materials.

Exhibit 43  Press Release issued by SK Parent Corp., dated February 23, 1998.

Exhibit 44* Press Release issued by Safety-Kleen Corp., dated February 25, 1998.

Exhibit 45* Press Release issued by Safety-Kleen Corp., dated February 25, 1998.

Exhibit 46* Press Release issued by Philip Services Corp., dated February 26,
            1998.

 

- ------------

  *Filed herewith.

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