公开(公告)号：US2767051A

公开(公告)日：1956-10-16

申请号：US36384153

申请日：1953-06-24

Applicant: ALLIED CHEM & DYE CORP

Inventor： FOLLOWS ALAN G ,  HOYT ERNEST B ,  SMITH EARL W

IPC: C01D7/18

CPC classification number: C01D7/18

公开(公告)号：US3288596A

公开(公告)日：1966-11-29

申请号：US39065764

申请日：1964-08-19

Applicant: ALLIED CHEM

Inventor： HOYT ERNEST B ,  FOLLOWS ALAN G

IPC: C22B34/32

CPC classification number: C22B34/32

公开(公告)号：US2768060A

公开(公告)日：1956-10-23

申请号：US39517453

申请日：1953-11-30

Applicant: ALLIED CHEM & DYE CORP

Inventor： FOLLOWS ALAN G

IPC: C01D7/16

CPC classification number: C01D7/16

公开(公告)号：US3705790A

公开(公告)日：1972-12-12

申请号：US3705790D

申请日：1970-12-01

Applicant: ALLIED CHEM

Inventor： GAROFANO NORMAN R ,  FOLLOWS ALAN G

IPC: C01D7/37 ,  C01D7/40 ,  C01D7/00

CPC classification number: C01D7/40 ,  C01D7/37

Abstract: INVENTION RELATES TO AN IMPROVED PROCESS FOR THE PREPARATION OF SODIUM CARBONATE PRECURSOR CRYSTALS BY A CRYSTALLIZATION PROCESS WHICH INVOLVES FORMING A FIRST CROP OF SAID CARBONATE PRECURSOR CRYSTALS FROM A SUBSTANTIALLY SATURATED CARBONATE PROCESS SOLUTION AND PROVIDING IN THE MOTHER LIQUOR SEPARATD FROM SAID FIRST CROP OF CRYSTALS A SUFFICIENT AMOUNT OF CALCIUM IONS SUCH THAT WHEN THE MOTHER LIQUOR IS SUBJECTED TO CRYSTALLIZATION AT A TEMPERATURE HIGHER THAN THAT EMPLOYED TO OBTAIN THE FIRST CROP OF SAID PRECURSOR CRYSTALS, A SECOND CROP OF SODIUM CARBONATE PRECURSOR CRYSTALS OF IMPROVED QUALITY IS OBTAINED.

公开(公告)号：US2837404A

公开(公告)日：1958-06-03

申请号：US60796456

申请日：1956-09-04

Applicant: ALLIED CHEM & DYE CORP

Inventor： FOLLOWS ALAN G

IPC: C01D7/16

CPC classification number: C01D7/16

公开(公告)号：US3557231A

公开(公告)日：1971-01-19

申请号：US3557231D

申请日：1969-05-05

Applicant: ALLIED CHEM

Inventor： KURTZ BRUCE E ,  FOLLOWS ALAN G ,  HARTFORD WINSLOW H

IPC: C07C17/361 ,  C07C17/00

CPC classification number: C07C17/361 ,  C07C19/03

Abstract: THIS INVENTION RELATES TO THE PREPARATION OF CHLOROMETHANES FROM METHYL CHLOROMETHYL ETHER BY REACTING AT ELEVATED TEMPERATURES METHYL CHLOROMETHYL ETHER WITH HYDROGEN CHLORIDE IN THE PRESENCE OF A ETHER-CLEAVING AGENT COMPRISING SULFUR TRIOXIDE DISSOLVED IN SULFURIC ACID, AND PREFERABLY HAVING DISSOLVED THEREIN A MINOR AMOUNT OF MERCURY. THE METHYL CHLOROMETHYL ETHER ID PREPARED BY REACTING ESSENTIALLY EQUIMOLAR PROPORTIONS OF METHYL ALCOHOL AND FORMALDEHYDE AND CONTACTING THIS MIXTURE IN COUNTERCURRENT RELATIONSHIP WITH HYDROGEN CHLORIDE IN A REACTION VESSEL AT ELEVATED TEMPERATURES.

公开(公告)号：US2882144A

公开(公告)日：1959-04-14

申请号：US52966355

申请日：1955-08-22

Applicant: ALLIED CHEM

Inventor： FOLLOWS ALAN G ,  KEENE PAUL A

IPC: C22B34/12

CPC classification number: C22B34/1272 ,  Y10S266/905