The easier way is to use RedGate SQL Search.
But, you can build a query using INFORMATION_SCHEMA.ROUTINES and the ROUTINE_DEFINITION if you feel like.
edit:
You can use this
SELECT ROUTINE_NAME, ROUTINE_DEFINITION
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%YOUR COLUMN %'
AND ROUTINE_TYPE='PROCEDURE'
or if you have more than one column with same name in database, you can use this.
select DISTINCT p.name
from sys.procedures p
INNER JOIN sys.sql_dependencies d on p.object_id = d.object_id
INNER JOIN sys.tables t on t.object_id = d.referenced_major_id
INNER JOIN INFORMATION_SCHEMA.ROUTINES R ON R.ROUTINE_NAME = p.name
WHERE R.ROUTINE_DEFINITION like '%YOUR COLUMN %' AND t.name = YOURTABLE
But, I think you should use Search SQL
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